btrfs: fix tree mod log mishandling of reallocated nodes

commit 968b71583130b6104c9f33ba60446d598e327a8b upstream.

We have been seeing the following panic in production

  kernel BUG at fs/btrfs/tree-mod-log.c:677!
  invalid opcode: 0000 [#1] SMP
  RIP: 0010:tree_mod_log_rewind+0x1b4/0x200
  RSP: 0000:ffffc9002c02f890 EFLAGS: 00010293
  RAX: 0000000000000003 RBX: ffff8882b448c700 RCX: 0000000000000000
  RDX: 0000000000008000 RSI: 00000000000000a7 RDI: ffff88877d831c00
  RBP: 0000000000000002 R08: 000000000000009f R09: 0000000000000000
  R10: 0000000000000000 R11: 0000000000100c40 R12: 0000000000000001
  R13: ffff8886c26d6a00 R14: ffff88829f5424f8 R15: ffff88877d831a00
  FS:  00007fee1d80c780(0000) GS:ffff8890400c0000(0000) knlGS:0000000000000000
  CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
  CR2: 00007fee1963a020 CR3: 0000000434f33002 CR4: 00000000007706e0
  DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
  DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
  PKRU: 55555554
  Call Trace:
   btrfs_get_old_root+0x12b/0x420
   btrfs_search_old_slot+0x64/0x2f0
   ? tree_mod_log_oldest_root+0x3d/0xf0
   resolve_indirect_ref+0xfd/0x660
   ? ulist_alloc+0x31/0x60
   ? kmem_cache_alloc_trace+0x114/0x2c0
   find_parent_nodes+0x97a/0x17e0
   ? ulist_alloc+0x30/0x60
   btrfs_find_all_roots_safe+0x97/0x150
   iterate_extent_inodes+0x154/0x370
   ? btrfs_search_path_in_tree+0x240/0x240
   iterate_inodes_from_logical+0x98/0xd0
   ? btrfs_search_path_in_tree+0x240/0x240
   btrfs_ioctl_logical_to_ino+0xd9/0x180
   btrfs_ioctl+0xe2/0x2ec0
   ? __mod_memcg_lruvec_state+0x3d/0x280
   ? do_sys_openat2+0x6d/0x140
   ? kretprobe_dispatcher+0x47/0x70
   ? kretprobe_rethook_handler+0x38/0x50
   ? rethook_trampoline_handler+0x82/0x140
   ? arch_rethook_trampoline_callback+0x3b/0x50
   ? kmem_cache_free+0xfb/0x270
   ? do_sys_openat2+0xd5/0x140
   __x64_sys_ioctl+0x71/0xb0
   do_syscall_64+0x2d/0x40

Which is this code in tree_mod_log_rewind()

switch (tm->op) {
        case BTRFS_MOD_LOG_KEY_REMOVE_WHILE_FREEING:
BUG_ON(tm->slot < n);

This occurs because we replay the nodes in order that they happened, and
when we do a REPLACE we will log a REMOVE_WHILE_FREEING for every slot,
starting at 0.  'n' here is the number of items in this block, which in
this case was 1, but we had 2 REMOVE_WHILE_FREEING operations.

The actual root cause of this was that we were replaying operations for
a block that shouldn't have been replayed.  Consider the following
sequence of events

1. We have an already modified root, and we do a btrfs_get_tree_mod_seq().
2. We begin removing items from this root, triggering KEY_REPLACE for
   it's child slots.
3. We remove one of the 2 children this root node points to, thus triggering
   the root node promotion of the remaining child, and freeing this node.
4. We modify a new root, and re-allocate the above node to the root node of
   this other root.

The tree mod log looks something like this

logical 0 op KEY_REPLACE (slot 1) seq 2
logical 0 op KEY_REMOVE (slot 1) seq 3
logical 0 op KEY_REMOVE_WHILE_FREEING (slot 0) seq 4
logical 4096 op LOG_ROOT_REPLACE (old logical 0) seq 5
logical 8192 op KEY_REMOVE_WHILE_FREEING (slot 1) seq 6
logical 8192 op KEY_REMOVE_WHILE_FREEING (slot 0) seq 7
logical 0 op LOG_ROOT_REPLACE (old logical 8192) seq 8

>From here the bug is triggered by the following steps

1.  Call btrfs_get_old_root() on the new_root.
2.  We call tree_mod_log_oldest_root(btrfs_root_node(new_root)), which is
    currently logical 0.
3.  tree_mod_log_oldest_root() calls tree_mod_log_search_oldest(), which
    gives us the KEY_REPLACE seq 2, and since that's not a
    LOG_ROOT_REPLACE we incorrectly believe that we don't have an old
    root, because we expect that the most recent change should be a
    LOG_ROOT_REPLACE.
4.  Back in tree_mod_log_oldest_root() we don't have a LOG_ROOT_REPLACE,
    so we don't set old_root, we simply use our existing extent buffer.
5.  Since we're using our existing extent buffer (logical 0) we call
    tree_mod_log_search(0) in order to get the newest change to start the
    rewind from, which ends up being the LOG_ROOT_REPLACE at seq 8.
6.  Again since we didn't find an old_root we simply clone logical 0 at
    it's current state.
7.  We call tree_mod_log_rewind() with the cloned extent buffer.
8.  Set n = btrfs_header_nritems(logical 0), which would be whatever the
    original nritems was when we COWed the original root, say for this
    example it's 2.
9.  We start from the newest operation and work our way forward, so we
    see LOG_ROOT_REPLACE which we ignore.
10. Next we see KEY_REMOVE_WHILE_FREEING for slot 0, which triggers the
    BUG_ON(tm->slot < n), because it expects if we've done this we have a
    completely empty extent buffer to replay completely.

The correct thing would be to find the first LOG_ROOT_REPLACE, and then
get the old_root set to logical 8192.  In fact making that change fixes
this particular problem.

However consider the much more complicated case.  We have a child node
in this tree and the above situation.  In the above case we freed one
of the child blocks at the seq 3 operation.  If this block was also
re-allocated and got new tree mod log operations we would have a
different problem.  btrfs_search_old_slot(orig root) would get down to
the logical 0 root that still pointed at that node.  However in
btrfs_search_old_slot() we call tree_mod_log_rewind(buf) directly.  This
is not context aware enough to know which operations we should be
replaying.  If the block was re-allocated multiple times we may only
want to replay a range of operations, and determining what that range is
isn't possible to determine.

We could maybe solve this by keeping track of which root the node
belonged to at every tree mod log operation, and then passing this
around to make sure we're only replaying operations that relate to the
root we're trying to rewind.

However there's a simpler way to solve this problem, simply disallow
reallocations if we have currently running tree mod log users.  We
already do this for leaf's, so we're simply expanding this to nodes as
well.  This is a relatively uncommon occurrence, and the problem is
complicated enough I'm worried that we will still have corner cases in
the reallocation case.  So fix this in the most straightforward way
possible.

Fixes: bd989ba359f2 ("Btrfs: add tree modification log functions")
CC: stable@vger.kernel.org # 3.3+
Reviewed-by: Filipe Manana <fdmanana@suse.com>
Signed-off-by: Josef Bacik <josef@toxicpanda.com>
Signed-off-by: David Sterba <dsterba@suse.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

btrfs: fix lost file sync on direct IO write with nowait and dsync iocb

commit 8184620ae21213d51eaf2e0bd4186baacb928172 upstream.

When doing a direct IO write using a iocb with nowait and dsync set, we
end up not syncing the file once the write completes.

This is because we tell iomap to not call generic_write_sync(), which
would result in calling btrfs_sync_file(), in order to avoid a deadlock
since iomap can call it while we are holding the inode's lock and
btrfs_sync_file() needs to acquire the inode's lock. The deadlock happens
only if the write happens synchronously, when iomap_dio_rw() calls
iomap_dio_complete() before it returns. Instead we do the sync ourselves
at btrfs_do_write_iter().

For a nowait write however we can end up not doing the sync ourselves at
at btrfs_do_write_iter() because the write could have been queued, and
therefore we get -EIOCBQUEUED returned from iomap in such case. That makes
us skip the sync call at btrfs_do_write_iter(), as we don't do it for
any error returned from btrfs_direct_write(). We can't simply do the call
even if -EIOCBQUEUED is returned, since that would block the task waiting
for IO, both for the data since there are bios still in progress as well
as potentially blocking when joining a log transaction and when syncing
the log (writing log trees, super blocks, etc).

So let iomap do the sync call itself and in order to avoid deadlocks for
the case of synchronous writes (without nowait), use __iomap_dio_rw() and
have ourselves call iomap_dio_complete() after unlocking the inode.

A test case will later be sent for fstests, after this is fixed in Linus'
tree.

Fixes: 51bd9563b678 ("btrfs: fix deadlock due to page faults during direct IO reads and writes")
Reported-by: Марк Коренберг <socketpair@gmail.com>
Link: https://lore.kernel.org/linux-btrfs/CAEmTpZGRKbzc16fWPvxbr6AfFsQoLmz-Lcg-7OgJOZDboJ+SGQ@mail.gmail.com/
CC: stable@vger.kernel.org # 6.0+
Signed-off-by: Filipe Manana <fdmanana@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

fscrypt: fix keyring memory leak on mount failure

commit ccd30a476f8e864732de220bd50e6f372f5ebcab upstream.

Commit d7e7b9af104c ("fscrypt: stop using keyrings subsystem for
fscrypt_master_key") moved the keyring destruction from __put_super() to
generic_shutdown_super() so that the filesystem's block device(s) are
still available.  Unfortunately, this causes a memory leak in the case
where a mount is attempted with the test_dummy_encryption mount option,
but the mount fails after the option has already been processed.

To fix this, attempt the keyring destruction in both places.

Reported-by: syzbot+104c2a89561289cec13e@syzkaller.appspotmail.com
Fixes: d7e7b9af104c ("fscrypt: stop using keyrings subsystem for fscrypt_master_key")
Signed-off-by: Eric Biggers <ebiggers@google.com>
Reviewed-by: Christian Brauner (Microsoft) <brauner@kernel.org>
Link: https://lore.kernel.org/r/20221011213838.209879-1-ebiggers@kernel.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

fscrypt: stop using keyrings subsystem for fscrypt_master_key

commit d7e7b9af104c7b389a0c21eb26532511bce4b510 upstream.

The approach of fs/crypto/ internally managing the fscrypt_master_key
structs as the payloads of "struct key" objects contained in a
"struct key" keyring has outlived its usefulness.  The original idea was
to simplify the code by reusing code from the keyrings subsystem.
However, several issues have arisen that can't easily be resolved:

- When a master key struct is destroyed, blk_crypto_evict_key() must be
  called on any per-mode keys embedded in it.  (This started being the
  case when inline encryption support was added.)  Yet, the keyrings
  subsystem can arbitrarily delay the destruction of keys, even past the
  time the filesystem was unmounted.  Therefore, currently there is no
  easy way to call blk_crypto_evict_key() when a master key is
  destroyed.  Currently, this is worked around by holding an extra
  reference to the filesystem's request_queue(s).  But it was overlooked
  that the request_queue reference is *not* guaranteed to pin the
  corresponding blk_crypto_profile too; for device-mapper devices that
  support inline crypto, it doesn't.  This can cause a use-after-free.

- When the last inode that was using an incompletely-removed master key
  is evicted, the master key removal is completed by removing the key
  struct from the keyring.  Currently this is done via key_invalidate().
  Yet, key_invalidate() takes the key semaphore.  This can deadlock when
  called from the shrinker, since in fscrypt_ioctl_add_key(), memory is
  allocated with GFP_KERNEL under the same semaphore.

- More generally, the fact that the keyrings subsystem can arbitrarily
  delay the destruction of keys (via garbage collection delay, or via
  random processes getting temporary key references) is undesirable, as
  it means we can't strictly guarantee that all secrets are ever wiped.

- Doing the master key lookups via the keyrings subsystem results in the
  key_permission LSM hook being called.  fscrypt doesn't want this, as
  all access control for encrypted files is designed to happen via the
  files themselves, like any other files.  The workaround which SELinux
  users are using is to change their SELinux policy to grant key search
  access to all domains.  This works, but it is an odd extra step that
  shouldn't really have to be done.

The fix for all these issues is to change the implementation to what I
should have done originally: don't use the keyrings subsystem to keep
track of the filesystem's fscrypt_master_key structs.  Instead, just
store them in a regular kernel data structure, and rework the reference
counting, locking, and lifetime accordingly.  Retain support for
RCU-mode key lookups by using a hash table.  Replace fscrypt_sb_free()
with fscrypt_sb_delete(), which releases the keys synchronously and runs
a bit earlier during unmount, so that block devices are still available.

A side effect of this patch is that neither the master keys themselves
nor the filesystem keyrings will be listed in /proc/keys anymore.
("Master key users" and the master key users keyrings will still be
listed.)  However, this was mostly an implementation detail, and it was
intended just for debugging purposes.  I don't know of anyone using it.

This patch does *not* change how "master key users" (->mk_users) works;
that still uses the keyrings subsystem.  That is still needed for key
quotas, and changing that isn't necessary to solve the issues listed
above.  If we decide to change that too, it would be a separate patch.

I've marked this as fixing the original commit that added the fscrypt
keyring, but as noted above the most important issue that this patch
fixes wasn't introduced until the addition of inline encryption support.

Fixes: 22d94f493bfb ("fscrypt: add FS_IOC_ADD_ENCRYPTION_KEY ioctl")
Signed-off-by: Eric Biggers <ebiggers@google.com>
Link: https://lore.kernel.org/r/20220901193208.138056-2-ebiggers@kernel.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

af_unix: Fix memory leaks of the whole sk due to OOB skb.

commit 7a62ed61367b8fd01bae1e18e30602c25060d824 upstream.

syzbot reported a sequence of memory leaks, and one of them indicated we
failed to free a whole sk:

  unreferenced object 0xffff8880126e0000 (size 1088):
    comm "syz-executor419", pid 326, jiffies 4294773607 (age 12.609s)
    hex dump (first 32 bytes):
      00 00 00 00 00 00 00 00 7d 00 00 00 00 00 00 00  ........}.......
      01 00 07 40 00 00 00 00 00 00 00 00 00 00 00 00  ...@............
    backtrace:
      [<000000006fefe750>] sk_prot_alloc+0x64/0x2a0 net/core/sock.c:1970
      [<0000000074006db5>] sk_alloc+0x3b/0x800 net/core/sock.c:2029
      [<00000000728cd434>] unix_create1+0xaf/0x920 net/unix/af_unix.c:928
      [<00000000a279a139>] unix_create+0x113/0x1d0 net/unix/af_unix.c:997
      [<0000000068259812>] __sock_create+0x2ab/0x550 net/socket.c:1516
      [<00000000da1521e1>] sock_create net/socket.c:1566 [inline]
      [<00000000da1521e1>] __sys_socketpair+0x1a8/0x550 net/socket.c:1698
      [<000000007ab259e1>] __do_sys_socketpair net/socket.c:1751 [inline]
      [<000000007ab259e1>] __se_sys_socketpair net/socket.c:1748 [inline]
      [<000000007ab259e1>] __x64_sys_socketpair+0x97/0x100 net/socket.c:1748
      [<000000007dedddc1>] do_syscall_x64 arch/x86/entry/common.c:50 [inline]
      [<000000007dedddc1>] do_syscall_64+0x38/0x90 arch/x86/entry/common.c:80
      [<000000009456679f>] entry_SYSCALL_64_after_hwframe+0x63/0xcd

We can reproduce this issue by creating two AF_UNIX SOCK_STREAM sockets,
send()ing an OOB skb to each other, and close()ing them without consuming
the OOB skbs.

  int skpair[2];

  socketpair(AF_UNIX, SOCK_STREAM, 0, skpair);

  send(skpair[0], "x", 1, MSG_OOB);
  send(skpair[1], "x", 1, MSG_OOB);

  close(skpair[0]);
  close(skpair[1]);

Currently, we free an OOB skb in unix_sock_destructor() which is called via
__sk_free(), but it's too late because the receiver's unix_sk(sk)->oob_skb
is accounted against the sender's sk->sk_wmem_alloc and __sk_free() is
called only when sk->sk_wmem_alloc is 0.

In the repro sequences, we do not consume the OOB skb, so both two sk's
sock_put() never reach __sk_free() due to the positive sk->sk_wmem_alloc.
Then, no one can consume the OOB skb nor call __sk_free(), and we finally
leak the two whole sk.

Thus, we must free the unconsumed OOB skb earlier when close()ing the
socket.

Fixes: 314001f0bf92 ("af_unix: Add OOB support")
Reported-by: syzbot <syzkaller@googlegroups.com>
Signed-off-by: Kuniyuki Iwashima <kuniyu@amazon.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Anil Altinay <aaltinay@google.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

block, bfq: protect 'bfqd->queued' by 'bfqd->lock'

commit 181490d5321806e537dc5386db5ea640b826bf78 upstream.

If bfq_schedule_dispatch() is called from bfq_idle_slice_timer_body(),
then 'bfqd->queued' is read without holding 'bfqd->lock'. This is
wrong since it can be wrote concurrently.

Fix the problem by holding 'bfqd->lock' in such case.

Signed-off-by: Yu Kuai <yukuai3@huawei.com>
Reviewed-by: Jan Kara <jack@suse.cz>
Reviewed-by: Chaitanya Kulkarni <kch@nvidia.com>
Link: https://lore.kernel.org/r/20220513023507.2625717-2-yukuai3@huawei.com
Signed-off-by: Jens Axboe <axboe@kernel.dk>
Cc: Khazhy Kumykov <khazhy@chromium.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

Bluetooth: L2CAP: Fix attempting to access uninitialized memory

commit b1a2cd50c0357f243b7435a732b4e62ba3157a2e upstream.

On l2cap_parse_conf_req the variable efs is only initialized if
remote_efs has been set.

CVE: CVE-2022-42895
CC: stable@vger.kernel.org
Reported-by: Tamás Koczka <poprdi@google.com>
Signed-off-by: Luiz Augusto von Dentz <luiz.von.dentz@intel.com>
Reviewed-by: Tedd Ho-Jeong An <tedd.an@intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

Bluetooth: L2CAP: Fix accepting connection request for invalid SPSM

commit 711f8c3fb3db61897080468586b970c87c61d9e4 upstream.

The Bluetooth spec states that the valid range for SPSM is from
0x0001-0x00ff so it is invalid to accept values outside of this range:

  BLUETOOTH CORE SPECIFICATION Version 5.3 | Vol 3, Part A
  page 1059:
  Table 4.15: L2CAP_LE_CREDIT_BASED_CONNECTION_REQ SPSM ranges

CVE: CVE-2022-42896
CC: stable@vger.kernel.org
Reported-by: Tamás Koczka <poprdi@google.com>
Signed-off-by: Luiz Augusto von Dentz <luiz.von.dentz@intel.com>
Reviewed-by: Tedd Ho-Jeong An <tedd.an@intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

i2c: piix4: Fix adapter not be removed in piix4_remove()

[ Upstream commit 569bea74c94d37785682b11bab76f557520477cd ]

In piix4_probe(), the piix4 adapter will be registered in:

   piix4_probe()
     piix4_add_adapters_sb800() / piix4_add_adapter()
       i2c_add_adapter()

Based on the probed device type, piix4_add_adapters_sb800() or single
piix4_add_adapter() will be called.
For the former case, piix4_adapter_count is set as the number of adapters,
while for antoher case it is not set and kept default *zero*.

When piix4 is removed, piix4_remove() removes the adapters added in
piix4_probe(), basing on the piix4_adapter_count value.
Because the count is zero for the single adapter case, the adapter won't
be removed and makes the sources allocated for adapter leaked, such as
the i2c client and device.

These sources can still be accessed by i2c or bus and cause problems.
An easily reproduced case is that if a new adapter is registered, i2c
will get the leaked adapter and try to call smbus_algorithm, which was
already freed:

Triggered by: rmmod i2c_piix4 && modprobe max31730

 BUG: unable to handle page fault for address: ffffffffc053d860
 #PF: supervisor read access in kernel mode
 #PF: error_code(0x0000) - not-present page
 Oops: 0000 [#1] PREEMPT SMP KASAN
 CPU: 0 PID: 3752 Comm: modprobe Tainted: G
 Hardware name: QEMU Standard PC (i440FX + PIIX, 1996)
 RIP: 0010:i2c_default_probe (drivers/i2c/i2c-core-base.c:2259) i2c_core
 RSP: 0018:ffff888107477710 EFLAGS: 00000246
 ...
 <TASK>
  i2c_detect (drivers/i2c/i2c-core-base.c:2302) i2c_core
  __process_new_driver (drivers/i2c/i2c-core-base.c:1336) i2c_core
  bus_for_each_dev (drivers/base/bus.c:301)
  i2c_for_each_dev (drivers/i2c/i2c-core-base.c:1823) i2c_core
  i2c_register_driver (drivers/i2c/i2c-core-base.c:1861) i2c_core
  do_one_initcall (init/main.c:1296)
  do_init_module (kernel/module/main.c:2455)
  ...
 </TASK>
 ---[ end trace 0000000000000000 ]---

Fix this problem by correctly set piix4_adapter_count as 1 for the
single adapter so it can be normally removed.

Fixes: 528d53a1592b ("i2c: piix4: Fix probing of reserved ports on AMD Family 16h Model 30h")
Signed-off-by: Chen Zhongjin <chenzhongjin@huawei.com>
Reviewed-by: Jean Delvare <jdelvare@suse.de>
Signed-off-by: Wolfram Sang <wsa@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>

arm64: dts: juno: Add thermal critical trip points

[ Upstream commit c4a7b9b587ca1bb4678d48d8be7132492b23a81c ]

When thermnal zones are defined, trip points definitions are mandatory.
Define a couple of critical trip points for monitoring of existing
PMIC and SOC thermal zones.

This was lost between txt to yaml conversion and was re-enforced recently
via the commit 8c596324232d ("dt-bindings: thermal: Fix missing required property")

Cc: Rob Herring <robh+dt@kernel.org>
Cc: Krzysztof Kozlowski <krzysztof.kozlowski+dt@linaro.org>
Cc: devicetree@vger.kernel.org
Signed-off-by: Cristian Marussi <cristian.marussi@arm.com>
Fixes: f7b636a8d83c ("arm64: dts: juno: add thermal zones for scpi sensors")
Link: https://lore.kernel.org/r/20221028140833.280091-8-cristian.marussi@arm.com
Signed-off-by: Sudeep Holla <sudeep.holla@arm.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>

firmware: arm_scmi: Fix devres allocation device in virtio transport

[ Upstream commit 5ffc1c4cb896f8d2cf10309422da3633a616d60f ]

SCMI virtio transport device managed allocations must use the main
platform device in devres operations instead of the channel devices.

Cc: Peter Hilber <peter.hilber@opensynergy.com>
Fixes: 46abe13b5e3d ("firmware: arm_scmi: Add virtio transport")
Signed-off-by: Cristian Marussi <cristian.marussi@arm.com>
Link: https://lore.kernel.org/r/20221028140833.280091-5-cristian.marussi@arm.com
Signed-off-by: Sudeep Holla <sudeep.holla@arm.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>

firmware: arm_scmi: Make Rx chan_setup fail on memory errors

[ Upstream commit be9ba1f7f9e0b565b19f4294f5871da9d654bc6d ]

SCMI Rx channels are optional and they can fail to be setup when not
present but anyway channels setup routines must bail-out on memory errors.

Make channels setup, and related probing, fail when memory errors are
reported on Rx channels.

Fixes: 5c8a47a5a91d ("firmware: arm_scmi: Make scmi core independent of the transport type")
Signed-off-by: Cristian Marussi <cristian.marussi@arm.com>
Link: https://lore.kernel.org/r/20221028140833.280091-4-cristian.marussi@arm.com
Signed-off-by: Sudeep Holla <sudeep.holla@arm.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>

firmware: arm_scmi: Suppress the driver's bind attributes

[ Upstream commit fd96fbc8fad35d6b1872c90df8a2f5d721f14d91 ]

Suppress the capability to unbind the core SCMI driver since all the
SCMI stack protocol drivers depend on it.

Fixes: aa4f886f3893 ("firmware: arm_scmi: add basic driver infrastructure for SCMI")
Signed-off-by: Cristian Marussi <cristian.marussi@arm.com>
Link: https://lore.kernel.org/r/20221028140833.280091-2-cristian.marussi@arm.com
Signed-off-by: Sudeep Holla <sudeep.holla@arm.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>

block: Fix possible memory leak for rq_wb on add_disk failure

[ Upstream commit fa81cbafbf5764ad5053512152345fab37a1fe18 ]

kmemleak reported memory leaks in device_add_disk():

kmemleak: 3 new suspected memory leaks

unreferenced object 0xffff88800f420800 (size 512):
  comm "modprobe", pid 4275, jiffies 4295639067 (age 223.512s)
  hex dump (first 32 bytes):
    04 00 00 00 08 00 00 00 01 00 00 00 00 00 00 00  ................
    00 e1 f5 05 00 00 00 00 00 00 00 00 00 00 00 00  ................
  backtrace:
    [<00000000d3662699>] kmalloc_trace+0x26/0x60
    [<00000000edc7aadc>] wbt_init+0x50/0x6f0
    [<0000000069601d16>] wbt_enable_default+0x157/0x1c0
    [<0000000028fc393f>] blk_register_queue+0x2a4/0x420
    [<000000007345a042>] device_add_disk+0x6fd/0xe40
    [<0000000060e6aab0>] nbd_dev_add+0x828/0xbf0 [nbd]
    ...

It is because the memory allocated in wbt_enable_default() is not
released in device_add_disk() error path.
Normally, these memory are freed in:

del_gendisk()
  rq_qos_exit()
    rqos->ops->exit(rqos);
      wbt_exit()

So rq_qos_exit() is called to free the rq_wb memory for wbt_init().
However in the error path of device_add_disk(), only
blk_unregister_queue() is called and make rq_wb memory leaked.

Add rq_qos_exit() to the error path to fix it.

Fixes: 83cbce957446 ("block: add error handling for device_add_disk / add_disk")
Signed-off-by: Chen Zhongjin <chenzhongjin@huawei.com>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Link: https://lore.kernel.org/r/20221029071355.35462-1-chenzhongjin@huawei.com
Signed-off-by: Jens Axboe <axboe@kernel.dk>
Signed-off-by: Sasha Levin <sashal@kernel.org>

arm64: dts: ls208xa: specify clock frequencies for the MDIO controllers

[ Upstream commit d5c921a53c80dfa942f6dff36253db5a50775a5f ]

Up until now, the external MDIO controller frequency values relied
either on the default ones out of reset or on those setup by u-boot.
Let's just properly specify the MDC frequency in the DTS so that even
without u-boot's intervention Linux can drive the MDIO bus.

Fixes: 0420dde30a90 ("arm64: dts: ls208xa: add the external MDIO nodes")
Signed-off-by: Ioana Ciornei <ioana.ciornei@nxp.com>
Signed-off-by: Shawn Guo <shawnguo@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>

arm64: dts: ls1088a: specify clock frequencies for the MDIO controllers

[ Upstream commit d78a57426e64fc4c61e6189e450a0432d24536ca ]

Up until now, the external MDIO controller frequency values relied
either on the default ones out of reset or on those setup by u-boot.
Let's just properly specify the MDC frequency in the DTS so that even
without u-boot's intervention Linux can drive the MDIO bus.

Fixes: bbe75af7b092 ("arm64: dts: ls1088a: add external MDIO device nodes")
Signed-off-by: Ioana Ciornei <ioana.ciornei@nxp.com>
Signed-off-by: Shawn Guo <shawnguo@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>

arm64: dts: lx2160a: specify clock frequencies for the MDIO controllers

[ Upstream commit c126a0abc5dadd7df236f20aae6d8c3d103f095c ]

Up until now, the external MDIO controller frequency values relied
either on the default ones out of reset or on those setup by u-boot.
Let's just properly specify the MDC frequency in the DTS so that even
without u-boot's intervention Linux can drive the MDIO bus.

Fixes: 6e1b8fae892d ("arm64: dts: lx2160a: add emdio1 node")
Fixes: 5705b9dcda57 ("arm64: dts: lx2160a: add emdio2 node")
Signed-off-by: Ioana Ciornei <ioana.ciornei@nxp.com>
Signed-off-by: Shawn Guo <shawnguo@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>

arm64: dts: imx8: correct clock order

[ Upstream commit 06acb824d7d00a30e9400f67eee481b218371b5a ]

Per bindings/mmc/fsl-imx-esdhc.yaml, the clock order is ipg, ahb, per,
otherwise warning: "
mmc@5b020000: clock-names:1: 'ahb' was expected
mmc@5b020000: clock-names:2: 'per' was expected "

Fixes: 16c4ea7501b1 ("arm64: dts: imx8: switch to new lpcg clock binding")
Signed-off-by: Peng Fan <peng.fan@nxp.com>
Signed-off-by: Shawn Guo <shawnguo@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>

ARM: dts: imx6qdl-gw59{10,13}: fix user pushbutton GPIO offset

[ Upstream commit bb5ad73941dc3f4e3c2241348f385da6501d50ea ]

The GW5910 and GW5913 have a user pushbutton that is tied to the
Gateworks System Controller GPIO offset 2. Fix the invalid offset of 0.

Fixes: 64bf0a0af18d ("ARM: dts: imx6qdl-gw: add Gateworks System Controller support")
Signed-off-by: Tim Harvey <tharvey@gateworks.com>
Signed-off-by: Shawn Guo <shawnguo@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>

clk: qcom: Update the force mem core bit for GPU clocks

[ Upstream commit ffa20aa581cf5377fc397b0d0ff9d67ea823629b ]

There are few GPU clocks which are powering up the memories
and thus enable the FORCE_MEM_PERIPH always for these clocks
to force the periph_on signal to remain active during halt
state of the clock.

Fixes: a3cc092196ef ("clk: qcom: Add Global Clock controller (GCC) driver for SC7280")
Fixes: 3e0f01d6c7e7 ("clk: qcom: Add graphics clock controller driver for SC7280")
Signed-off-by: Taniya Das <quic_tdas@quicinc.com>
Signed-off-by: Satya Priya <quic_c_skakit@quicinc.com>
Link: https://lore.kernel.org/r/1666159535-6447-1-git-send-email-quic_c_skakit@quicinc.com
Signed-off-by: Stephen Boyd <sboyd@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>

efi/tpm: Pass correct address to memblock_reserve

[ Upstream commit f4cd18c5b2000df0c382f6530eeca9141ea41faf ]

memblock_reserve() expects a physical address, but the address being
passed for the TPM final events log is what was returned from
early_memremap(). This results in something like the following:

[    0.000000] memblock_reserve: [0xffffffffff2c0000-0xffffffffff2c00e4] efi_tpm_eventlog_init+0x324/0x370

Pass the address from efi like what is done for the TPM events log.

Fixes: c46f3405692d ("tpm: Reserve the TPM final events table")
Cc: Matthew Garrett <mjg59@google.com>
Cc: Jarkko Sakkinen <jarkko@kernel.org>
Cc: Bartosz Szczepanek <bsz@semihalf.com>
Cc: Ard Biesheuvel <ardb@kernel.org>
Signed-off-by: Jerry Snitselaar <jsnitsel@redhat.com>
Acked-by: Jarkko Sakkinen <jarkko@kernel.org>
Signed-off-by: Ard Biesheuvel <ardb@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>

i2c: xiic: Add platform module alias

[ Upstream commit b8caf0a0e04583fb71e21495bef84509182227ea ]

The missing "platform" alias is required for the mgb4 v4l2 driver to load
the i2c controller driver when probing the HW.

Signed-off-by: Martin Tůma <martin.tuma@digiteqautomotive.com>
Acked-by: Michal Simek <michal.simek@amd.com>
Signed-off-by: Wolfram Sang <wsa@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>

drm/amdgpu: set vm_update_mode=0 as default for Sienna Cichlid in SRIOV case

[ Upstream commit 65f8682b9aaae20c2cdee993e6fe52374ad513c9 ]

For asic with VF MMIO access protection avoid using CPU for VM table updates.
CPU pagetable updates have issues with HDP flush as VF MMIO access protection
blocks write to mmBIF_BX_DEV0_EPF0_VF0_HDP_MEM_COHERENCY_FLUSH_CNTL register
during sriov runtime.

v3: introduce virtualization capability flag AMDGPU_VF_MMIO_ACCESS_PROTECT
which indicates that VF MMIO write access is not allowed in sriov runtime

Signed-off-by: Danijel Slivka <danijel.slivka@amd.com>
Reviewed-by: Felix Kuehling <Felix.Kuehling@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>

HID: saitek: add madcatz variant of MMO7 mouse device ID

[ Upstream commit 79425b297f56bd481c6e97700a9a4e44c7bcfa35 ]

The MadCatz variant of the MMO7 mouse has the ID 0738:1713 and the same
quirks as the Saitek variant.

Signed-off-by: Samuel Bailey <samuel.bailey1@gmail.com>
Signed-off-by: Jiri Kosina <jkosina@suse.cz>
Signed-off-by: Sasha Levin <sashal@kernel.org>

scsi: core: Restrict legal sdev_state transitions via sysfs

[ Upstream commit 2331ce6126be8864b39490e705286b66e2344aac ]

Userspace can currently write to sysfs to transition sdev_state to RUNNING
or OFFLINE from any source state. This causes issues because proper
transitioning out of some states involves steps besides just changing
sdev_state, so allowing userspace to change sdev_state regardless of the
source state can result in inconsistencies; e.g. with ISCSI we can end up
with sdev_state == SDEV_RUNNING while the device queue is quiesced. Any
task attempting I/O on the device will then hang, and in more recent
kernels, iscsid will hang as well.

More detail about this bug is provided in my first attempt:

https://groups.google.com/g/open-iscsi/c/PNKca4HgPDs/m/CXaDkntOAQAJ

Link: https://lore.kernel.org/r/20220924000241.2967323-1-ushankar@purestorage.com
Signed-off-by: Uday Shankar <ushankar@purestorage.com>
Suggested-by: Mike Christie <michael.christie@oracle.com>
Reviewed-by: Hannes Reinecke <hare@suse.de>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>

ACPI: APEI: Fix integer overflow in ghes_estatus_pool_init()

[ Upstream commit 43d2748394c3feb86c0c771466f5847e274fc043 ]

Change num_ghes from int to unsigned int, preventing an overflow
and causing subsequent vmalloc() to fail.

The overflow happens in ghes_estatus_pool_init() when calculating
len during execution of the statement below as both multiplication
operands here are signed int:

len += (num_ghes * GHES_ESOURCE_PREALLOC_MAX_SIZE);

The following call trace is observed because of this bug:

[    9.317108] swapper/0: vmalloc error: size 18446744071562596352, exceeds total pages, mode:0xcc0(GFP_KERNEL), nodemask=(null),cpuset=/,mems_allowed=0-1
[    9.317131] Call Trace:
[    9.317134]  <TASK>
[    9.317137]  dump_stack_lvl+0x49/0x5f
[    9.317145]  dump_stack+0x10/0x12
[    9.317146]  warn_alloc.cold+0x7b/0xdf
[    9.317150]  ? __device_attach+0x16a/0x1b0
[    9.317155]  __vmalloc_node_range+0x702/0x740
[    9.317160]  ? device_add+0x17f/0x920
[    9.317164]  ? dev_set_name+0x53/0x70
[    9.317166]  ? platform_device_add+0xf9/0x240
[    9.317168]  __vmalloc_node+0x49/0x50
[    9.317170]  ? ghes_estatus_pool_init+0x43/0xa0
[    9.317176]  vmalloc+0x21/0x30
[    9.317177]  ghes_estatus_pool_init+0x43/0xa0
[    9.317179]  acpi_hest_init+0x129/0x19c
[    9.317185]  acpi_init+0x434/0x4a4
[    9.317188]  ? acpi_sleep_proc_init+0x2a/0x2a
[    9.317190]  do_one_initcall+0x48/0x200
[    9.317195]  kernel_init_freeable+0x221/0x284
[    9.317200]  ? rest_init+0xe0/0xe0
[    9.317204]  kernel_init+0x1a/0x130
[    9.317205]  ret_from_fork+0x22/0x30
[    9.317208]  </TASK>

Signed-off-by: Ashish Kalra <ashish.kalra@amd.com>
[ rjw: Subject and changelog edits ]
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>

media: v4l: subdev: Fail graciously when getting try data for NULL state

[ Upstream commit 2ba3e38517f5a4ebf9c997168079dca01b7f9fc6 ]

The state argument for the functions for obtaining various parts of the
state is NULL if it is called by drivers for active state. Fail graciously
in that case instead of dereferencing a NULL pointer.

Suggested-by: Bingbu Cao <bingbu.cao@intel.com>
Signed-off-by: Sakari Ailus <sakari.ailus@linux.intel.com>
Reviewed-by: Tomi Valkeinen <tomi.valkeinen@ideasonboard.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>

media: meson: vdec: fix possible refcount leak in vdec_probe()

[ Upstream commit 7718999356234d9cc6a11b4641bb773928f1390f ]

v4l2_device_unregister need to be called to put the refcount got by
v4l2_device_register when vdec_probe fails or vdec_remove is called.

Signed-off-by: Hangyu Hua <hbh25y@gmail.com>
Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
Signed-off-by: Mauro Carvalho Chehab <mchehab@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>

media: dvb-frontends/drxk: initialize err to 0

[ Upstream commit 20694e96ca089ce6693c2348f8f628ee621e4e74 ]

Fix a compiler warning:

drivers/media/dvb-frontends/drxk_hard.c: In function 'drxk_read_ucblocks':
drivers/media/dvb-frontends/drxk_hard.c:6673:21: warning: 'err' may be used uninitialized [-Wmaybe-uninitialized]
 6673 |         *ucblocks = (u32) err;
      |                     ^~~~~~~~~
drivers/media/dvb-frontends/drxk_hard.c:6663:13: note: 'err' was declared here
 6663 |         u16 err;
      |             ^~~

Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
Signed-off-by: Mauro Carvalho Chehab <mchehab@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>

media: cros-ec-cec: limit msg.len to CEC_MAX_MSG_SIZE

[ Upstream commit 2dc73b48665411a08c4e5f0f823dea8510761603 ]

I expect that the hardware will have limited this to 16, but just in
case it hasn't, check for this corner case.

Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
Signed-off-by: Mauro Carvalho Chehab <mchehab@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>

media: s5p_cec: limit msg.len to CEC_MAX_MSG_SIZE

[ Upstream commit 93f65ce036863893c164ca410938e0968964b26c ]

I expect that the hardware will have limited this to 16, but just in
case it hasn't, check for this corner case.

Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
Signed-off-by: Mauro Carvalho Chehab <mchehab@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>

media: rkisp1: Zero v4l2_subdev_format fields in when validating links

[ Upstream commit c53e3a049f35978a150526671587fd46b1ae7ca1 ]

The local sd_fmt variable in rkisp1_capture_link_validate() has
uninitialized fields, which causes random failures when calling the
subdev .get_fmt() operation. Fix it by initializing the variable when
declaring it, which zeros all other fields.

Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Reviewed-by: Paul Elder <paul.elder@ideasonboard.com>
Reviewed-by: Dafna Hirschfeld <dafna@fastmail.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>

media: rkisp1: Use correct macro for gradient registers

[ Upstream commit 4c3501f13e8e60f6e7e7308c77ac4404e1007c18 ]

The rkisp1_lsc_config() function incorrectly uses the
RKISP1_CIF_ISP_LSC_SECT_SIZE() macro for the gradient registers. Replace
it with the correct macro, and rename it from
RKISP1_CIF_ISP_LSC_GRAD_SIZE() to RKISP1_CIF_ISP_LSC_SECT_GRAD() as the
corresponding registers store the gradients for each sector, not a size.
This doesn't cause any functional change as the two macros are defined
identically (the size and gradient registers store fields in the same
number of bits at the same positions).

Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Reviewed-by: Dafna Hirschfeld <dafna@fastmail.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>

media: rkisp1: Initialize color space on resizer sink and source pads

[ Upstream commit 83b9296e399367862845d3b19984444fc756bd61 ]

Initialize the four color space fields on the sink and source video pads
of the resizer in the .init_cfg() operation. The resizer can't perform
any color space conversion, so set the sink and source color spaces to
the same defaults, which match the ISP source video pad default.

Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Reviewed-by: Paul Elder <paul.elder@ideasonboard.com>
Reviewed-by: Dafna Hirschfeld <dafna@fastmail.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>

media: rkisp1: Don't pass the quantization to rkisp1_csm_config()

[ Upstream commit 711d91497e203b058cf0a08c0f7d41c04efbde76 ]

The rkisp1_csm_config() function takes a pointer to the rkisp1_params
structure which contains the quantization value. There's no need to pass
it separately to the function. Drop it from the function parameters.

Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Reviewed-by: Dafna Hirschfeld <dafna@fastmail.com>
Reviewed-by: Paul Elder <paul.elder@ideasonboard.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>

s390/cio: fix out-of-bounds access on cio_ignore free

[ Upstream commit 1b6074112742f65ece71b0f299ca5a6a887d2db6 ]

The channel-subsystem-driver scans for newly available devices whenever
device-IDs are removed from the cio_ignore list using a command such as:

  echo free >/proc/cio_ignore

Since an I/O device scan might interfer with running I/Os, commit
172da89ed0ea ("s390/cio: avoid excessive path-verification requests")
introduced an optimization to exclude online devices from the scan.

The newly added check for online devices incorrectly assumes that
an I/O-subchannel's drvdata points to a struct io_subchannel_private.
For devices that are bound to a non-default I/O subchannel driver, such
as the vfio_ccw driver, this results in an out-of-bounds read access
during each scan.

Fix this by changing the scan logic to rely on a driver-independent
online indication. For this we can use struct subchannel->config.ena,
which is the driver's requested subchannel-enabled state. Since I/Os
can only be started on enabled subchannels, this matches the intent
of the original optimization of not scanning devices where I/O might
be running.

Fixes: 172da89ed0ea ("s390/cio: avoid excessive path-verification requests")
Fixes: 0c3812c347bf ("s390/cio: derive cdev information only for IO-subchannels")
Cc: <stable@vger.kernel.org> # v5.15
Reported-by: Alexander Egorenkov <egorenar@linux.ibm.com>
Reviewed-by: Vineeth Vijayan <vneethv@linux.ibm.com>
Signed-off-by: Peter Oberparleiter <oberpar@linux.ibm.com>
Signed-off-by: Vasily Gorbik <gor@linux.ibm.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>

s390/cio: derive cdev information only for IO-subchannels

[ Upstream commit 0c3812c347bfb0dc213556a195e79850c55702f5 ]

cdev->online for the purge function must not be checked for the
non-IO subchannel type. Make sure that we are deriving the cdev only
from sch-type SUBCHANNEL_TYPE_IO.

Signed-off-by: Vineeth Vijayan <vneethv@linux.ibm.com>
Reviewed-by: Peter Oberparleiter <oberpar@linux.ibm.com>
Signed-off-by: Vasily Gorbik <gor@linux.ibm.com>
Stable-dep-of: 1b6074112742 ("s390/cio: fix out-of-bounds access on cio_ignore free")
Signed-off-by: Sasha Levin <sashal@kernel.org>

s390/boot: add secure boot trailer

[ Upstream commit aa127a069ef312aca02b730d5137e1778d0c3ba7 ]

This patch enhances the kernel image adding a trailer as required for
secure boot by future firmware versions.

Cc: <stable@vger.kernel.org> # 5.2+
Signed-off-by: Peter Oberparleiter <oberpar@linux.ibm.com>
Reviewed-by: Sven Schnelle <svens@linux.ibm.com>
Signed-off-by: Vasily Gorbik <gor@linux.ibm.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>

s390/uaccess: add missing EX_TABLE entries to __clear_user()

[ Upstream commit 4e1b5a86a5edfbefc9396d41b0fc1a2ebd0101b6 ]

For some exception types the instruction address points behind the
instruction that caused the exception. Take that into account and add
the missing exception table entries.

Cc: <stable@vger.kernel.org>
Reviewed-by: Vasily Gorbik <gor@linux.ibm.com>
Signed-off-by: Heiko Carstens <hca@linux.ibm.com>
Signed-off-by: Vasily Gorbik <gor@linux.ibm.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>

mtd: parsers: bcm47xxpart: Fix halfblock reads

[ Upstream commit 05e258c6ec669d6d18c494ea03d35962d6f5b545 ]

There is some code in the parser that tries to read 0x8000
bytes into a block to "read in the middle" of the block. Well
that only works if the block is also 0x10000 bytes all the time,
else we get these parse errors as we reach the end of the flash:

spi-nor spi0.0: mx25l1606e (2048 Kbytes)
mtd_read error while parsing (offset: 0x200000): -22
mtd_read error while parsing (offset: 0x201000): -22
(...)

Fix the code to do what I think was intended.

Cc: stable@vger.kernel.org
Fixes: f0501e81fbaa ("mtd: bcm47xxpart: alternative MAGIC for board_data partition")
Cc: Rafał Miłecki <zajec5@gmail.com>
Cc: Florian Fainelli <f.fainelli@gmail.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Miquel Raynal <miquel.raynal@bootlin.com>
Link: https://lore.kernel.org/linux-mtd/20221018091129.280026-1-linus.walleij@linaro.org
Signed-off-by: Sasha Levin <sashal@kernel.org>

mtd: parsers: bcm47xxpart: print correct offset on read error

[ Upstream commit 4c38eded807043f40f4dc49da6df097f9dcac393 ]

mtd_read() gets called with offset + 0x8000 as argument so use the same
value in pr_err().

Signed-off-by: Rafał Miłecki <rafal@milecki.pl>
Signed-off-by: Miquel Raynal <miquel.raynal@bootlin.com>
Link: https://lore.kernel.org/linux-mtd/20220317114316.29827-1-zajec5@gmail.com
Stable-dep-of: 05e258c6ec66 ("mtd: parsers: bcm47xxpart: Fix halfblock reads")
Signed-off-by: Sasha Levin <sashal@kernel.org>

fbdev: stifb: Fall back to cfb_fillrect() on 32-bit HCRX cards

[ Upstream commit 776d875fd4cbb3884860ea7f63c3958f02b0c80e ]

When the text console is scrolling text upwards it calls the fillrect()
function to empty the new line. The current implementation doesn't seem
to work correctly on HCRX cards in 32-bit mode and leave garbage in that
line instead. Fix it by falling back to standard cfb_fillrect() in that
case.

Signed-off-by: Helge Deller <deller@gmx.de>
Cc: <stable@vger.kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>

video/fbdev/stifb: Implement the stifb_fillrect() function

[ Upstream commit 9c379c65241707e44072139d782bc2dfec9b4ab3 ]

The stifb driver (for Artist/HCRX graphics on PA-RISC) was missing
the fillrect function.
Tested on a 715/64 PA-RISC machine and in qemu.

Signed-off-by: Helge Deller <deller@gmx.de>
Stable-dep-of: 776d875fd4cb ("fbdev: stifb: Fall back to cfb_fillrect() on 32-bit HCRX cards")
Signed-off-by: Sasha Levin <sashal@kernel.org>

drm/msm/hdmi: fix IRQ lifetime

[ Upstream commit 152d394842bb564148e68b92486a87db0bf54859 ]

Device-managed resources allocated post component bind must be tied to
the lifetime of the aggregate DRM device or they will not necessarily be
released when binding of the aggregate device is deferred.

This is specifically true for the HDMI IRQ, which will otherwise remain
requested so that the next bind attempt fails when requesting the IRQ a
second time.

Fix this by tying the device-managed lifetime of the HDMI IRQ to the DRM
device so that it is released when bind fails.

Fixes: 067fef372c73 ("drm/msm/hdmi: refactor bind/init")
Cc: stable@vger.kernel.org # 3.19
Reviewed-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>
Signed-off-by: Johan Hovold <johan+linaro@kernel.org>
Tested-by: Kuogee Hsieh <quic_khsieh@quicinc.com>
Reviewed-by: Kuogee Hsieh <quic_khsieh@quicinc.com>
Patchwork: https://patchwork.freedesktop.org/patch/502666/
Link: https://lore.kernel.org/r/20220913085320.8577-9-johan+linaro@kernel.org
Signed-off-by: Abhinav Kumar <quic_abhinavk@quicinc.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>

drm/msm/hdmi: Remove spurious IRQF_ONESHOT flag

[ Upstream commit 088604d37e23e9ec01a501d0e3630bc4f02027a0 ]

Quoting the header comments, IRQF_ONESHOT is "Used by threaded interrupts
which need to keep the irq line disabled until the threaded handler has
been run.". When applied to an interrupt that doesn't request a threaded
irq then IRQF_ONESHOT has a lesser known (undocumented?) side effect,
which it to disable the forced threading of irqs. For "normal" kernels
if there is no thread_fn then IRQF_ONESHOT is a nop.

In this case disabling forced threading is not appropriate because the
driver calls wake_up_all() (via msm_hdmi_i2c_irq) and also directly uses
the regular spinlock API for locking (in msm_hdmi_hdcp_irq() ). Neither
of these APIs can be called from no-thread interrupt handlers on
PREEMPT_RT systems.

Fix this by removing IRQF_ONESHOT.

Signed-off-by: Daniel Thompson <daniel.thompson@linaro.org>
Reviewed-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>
Link: https://lore.kernel.org/r/20220201174734.196718-3-daniel.thompson@linaro.org
Signed-off-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>
Stable-dep-of: 152d394842bb ("drm/msm/hdmi: fix IRQ lifetime")
Signed-off-by: Sasha Levin <sashal@kernel.org>

vsock: fix possible infinite sleep in vsock_connectible_wait_data()

[ Upstream commit 466a85336fee6e3b35eb97b8405a28302fd25809 ]

Currently vsock_connectible_has_data() may miss a wakeup operation
between vsock_connectible_has_data() == 0 and the prepare_to_wait().

Fix the race by adding the process to the wait queue before checking
vsock_connectible_has_data().

Fixes: b3f7fd54881b ("af_vsock: separate wait data loop")
Signed-off-by: Dexuan Cui <decui@microsoft.com>
Reviewed-by: Stefano Garzarella <sgarzare@redhat.com>
Reported-by: Frédéric Dalleau <frederic.dalleau@docker.com>
Tested-by: Frédéric Dalleau <frederic.dalleau@docker.com>
Signed-off-by: Paolo Abeni <pabeni@redhat.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>

ipv6: fix WARNING in ip6_route_net_exit_late()

[ Upstream commit 768b3c745fe5789f2430bdab02f35a9ad1148d97 ]

During the initialization of ip6_route_net_init_late(), if file
ipv6_route or rt6_stats fails to be created, the initialization is
successful by default. Therefore, the ipv6_route or rt6_stats file
doesn't be found during the remove in ip6_route_net_exit_late(). It
will cause WRNING.

The following is the stack information:
name 'rt6_stats'
WARNING: CPU: 0 PID: 9 at fs/proc/generic.c:712 remove_proc_entry+0x389/0x460
Modules linked in:
Workqueue: netns cleanup_net
RIP: 0010:remove_proc_entry+0x389/0x460
PKRU: 55555554
Call Trace:
<TASK>
ops_exit_list+0xb0/0x170
cleanup_net+0x4ea/0xb00
process_one_work+0x9bf/0x1710
worker_thread+0x665/0x1080
kthread+0x2e4/0x3a0
ret_from_fork+0x1f/0x30
</TASK>

Fixes: cdb1876192db ("[NETNS][IPV6] route6 - create route6 proc files for the namespace")
Signed-off-by: Zhengchao Shao <shaozhengchao@huawei.com>
Reviewed-by: Eric Dumazet <edumazet@google.com>
Link: https://lore.kernel.org/r/20221102020610.351330-1-shaozhengchao@huawei.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>

net, neigh: Fix null-ptr-deref in neigh_table_clear()

[ Upstream commit f8017317cb0b279b8ab98b0f3901a2e0ac880dad ]

When IPv6 module gets initialized but hits an error in the middle,
kenel panic with:

KASAN: null-ptr-deref in range [0x0000000000000598-0x000000000000059f]
CPU: 1 PID: 361 Comm: insmod
Hardware name: QEMU Standard PC (i440FX + PIIX, 1996)
RIP: 0010:__neigh_ifdown.isra.0+0x24b/0x370
RSP: 0018:ffff888012677908 EFLAGS: 00000202
...
Call Trace:
 <TASK>
 neigh_table_clear+0x94/0x2d0
 ndisc_cleanup+0x27/0x40 [ipv6]
 inet6_init+0x21c/0x2cb [ipv6]
 do_one_initcall+0xd3/0x4d0
 do_init_module+0x1ae/0x670
...
Kernel panic - not syncing: Fatal exception

When ipv6 initialization fails, it will try to cleanup and calls:

neigh_table_clear()
  neigh_ifdown(tbl, NULL)
    pneigh_queue_purge(&tbl->proxy_queue, dev_net(dev == NULL))
    # dev_net(NULL) triggers null-ptr-deref.

Fix it by passing NULL to pneigh_queue_purge() in neigh_ifdown() if dev
is NULL, to make kernel not panic immediately.

Fixes: 66ba215cb513 ("neigh: fix possible DoS due to net iface start/stop loop")
Signed-off-by: Chen Zhongjin <chenzhongjin@huawei.com>
Reviewed-by: Eric Dumazet <edumazet@google.com>
Reviewed-by: Denis V. Lunev <den@openvz.org>
Link: https://lore.kernel.org/r/20221101121552.21890-1-chenzhongjin@huawei.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>

net/smc: Fix possible leaked pernet namespace in smc_init()

[ Upstream commit 62ff373da2534534c55debe6c724c7fe14adb97f ]

In smc_init(), register_pernet_subsys(&smc_net_stat_ops) is called
without any error handling.
If it fails, registering of &smc_net_ops won't be reverted.
And if smc_nl_init() fails, &smc_net_stat_ops itself won't be reverted.

This leaves wild ops in subsystem linkedlist and when another module
tries to call register_pernet_operations() it triggers page fault:

BUG: unable to handle page fault for address: fffffbfff81b964c
RIP: 0010:register_pernet_operations+0x1b9/0x5f0
Call Trace:
  <TASK>
  register_pernet_subsys+0x29/0x40
  ebtables_init+0x58/0x1000 [ebtables]
  ...

Fixes: 194730a9beb5 ("net/smc: Make SMC statistics network namespace aware")
Signed-off-by: Chen Zhongjin <chenzhongjin@huawei.com>
Reviewed-by: Tony Lu <tonylu@linux.alibaba.com>
Reviewed-by: Wenjia Zhang <wenjia@linux.ibm.com>
Link: https://lore.kernel.org/r/20221101093722.127223-1-chenzhongjin@huawei.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>

stmmac: dwmac-loongson: fix invalid mdio_node

[ Upstream commit 2ae34111fe4eebb69986f6490015b57c88804373 ]

In current code "plat->mdio_node" is always NULL, the mdio
support is lost as there is no "mdio_bus_data". The original
driver could work as the "mdio" variable is never set to
false, which is described in commit <b0e03950dd71> ("stmmac:
dwmac-loongson: fix uninitialized variable ......"). And
after this commit merged, the "mdio" variable is always
false, causing the mdio supoort logic lost.

Fixes: 30bba69d7db4 ("stmmac: pci: Add dwmac support for Loongson")
Signed-off-by: Liu Peibao <liupeibao@loongson.cn>
Reviewed-by: Andrew Lunn <andrew@lunn.ch>
Link: https://lore.kernel.org/r/20221101060218.16453-1-liupeibao@loongson.cn
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>

ibmvnic: Free rwi on reset success

[ Upstream commit d6dd2fe71153f0ff748bf188bd4af076fe09a0a6 ]

Free the rwi structure in the event that the last rwi in the list
processed successfully. The logic in commit 4f408e1fa6e1 ("ibmvnic:
retry reset if there are no other resets") introduces an issue that
results in a 32 byte memory leak whenever the last rwi in the list
gets processed.

Fixes: 4f408e1fa6e1 ("ibmvnic: retry reset if there are no other resets")
Signed-off-by: Nick Child <nnac123@linux.ibm.com>
Link: https://lore.kernel.org/r/20221031150642.13356-1-nnac123@linux.ibm.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>

net: mdio: fix undefined behavior in bit shift for __mdiobus_register

[ Upstream commit 40e4eb324c59e11fcb927aa46742d28aba6ecb8a ]

Shifting signed 32-bit value by 31 bits is undefined, so changing
significant bit to unsigned. The UBSAN warning calltrace like below:

UBSAN: shift-out-of-bounds in drivers/net/phy/mdio_bus.c:586:27
left shift of 1 by 31 places cannot be represented in type 'int'
Call Trace:
 <TASK>
 dump_stack_lvl+0x7d/0xa5
 dump_stack+0x15/0x1b
 ubsan_epilogue+0xe/0x4e
 __ubsan_handle_shift_out_of_bounds+0x1e7/0x20c
 __mdiobus_register+0x49d/0x4e0
 fixed_mdio_bus_init+0xd8/0x12d
 do_one_initcall+0x76/0x430
 kernel_init_freeable+0x3b3/0x422
 kernel_init+0x24/0x1e0
 ret_from_fork+0x1f/0x30
 </TASK>

Fixes: 4fd5f812c23c ("phylib: allow incremental scanning of an mii bus")
Signed-off-by: Gaosheng Cui <cuigaosheng1@huawei.com>
Reviewed-by: Andrew Lunn <andrew@lunn.ch>
Link: https://lore.kernel.org/r/20221031132645.168421-1-cuigaosheng1@huawei.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>

Bluetooth: L2CAP: Fix memory leak in vhci_write

[ Upstream commit 7c9524d929648935bac2bbb4c20437df8f9c3f42 ]

Syzkaller reports a memory leak as follows:
====================================
BUG: memory leak
unreferenced object 0xffff88810d81ac00 (size 240):
  [...]
  hex dump (first 32 bytes):
    00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00  ................
    00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00  ................
  backtrace:
    [<ffffffff838733d9>] __alloc_skb+0x1f9/0x270 net/core/skbuff.c:418
    [<ffffffff833f742f>] alloc_skb include/linux/skbuff.h:1257 [inline]
    [<ffffffff833f742f>] bt_skb_alloc include/net/bluetooth/bluetooth.h:469 [inline]
    [<ffffffff833f742f>] vhci_get_user drivers/bluetooth/hci_vhci.c:391 [inline]
    [<ffffffff833f742f>] vhci_write+0x5f/0x230 drivers/bluetooth/hci_vhci.c:511
    [<ffffffff815e398d>] call_write_iter include/linux/fs.h:2192 [inline]
    [<ffffffff815e398d>] new_sync_write fs/read_write.c:491 [inline]
    [<ffffffff815e398d>] vfs_write+0x42d/0x540 fs/read_write.c:578
    [<ffffffff815e3cdd>] ksys_write+0x9d/0x160 fs/read_write.c:631
    [<ffffffff845e0645>] do_syscall_x64 arch/x86/entry/common.c:50 [inline]
    [<ffffffff845e0645>] do_syscall_64+0x35/0xb0 arch/x86/entry/common.c:80
    [<ffffffff84600087>] entry_SYSCALL_64_after_hwframe+0x63/0xcd
====================================

HCI core will uses hci_rx_work() to process frame, which is queued to
the hdev->rx_q tail in hci_recv_frame() by HCI driver.

Yet the problem is that, HCI core may not free the skb after handling
ACL data packets. To be more specific, when start fragment does not
contain the L2CAP length, HCI core just copies skb into conn->rx_skb and
finishes frame process in l2cap_recv_acldata(), without freeing the skb,
which triggers the above memory leak.

This patch solves it by releasing the relative skb, after processing
the above case in l2cap_recv_acldata().

Fixes: 4d7ea8ee90e4 ("Bluetooth: L2CAP: Fix handling fragmented length")
Link: https://lore.kernel.org/all/0000000000000d0b1905e6aaef64@google.com/
Reported-and-tested-by: syzbot+8f819e36e01022991cfa@syzkaller.appspotmail.com
Signed-off-by: Hawkins Jiawei <yin31149@gmail.com>
Signed-off-by: Luiz Augusto von Dentz <luiz.von.dentz@intel.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>

Bluetooth: L2CAP: fix use-after-free in l2cap_conn_del()

[ Upstream commit 0d0e2d032811280b927650ff3c15fe5020e82533 ]

When l2cap_recv_frame() is invoked to receive data, and the cid is
L2CAP_CID_A2MP, if the channel does not exist, it will create a channel.
However, after a channel is created, the hold operation of the channel
is not performed. In this case, the value of channel reference counting
is 1. As a result, after hci_error_reset() is triggered, l2cap_conn_del()
invokes the close hook function of A2MP to release the channel. Then
 l2cap_chan_unlock(chan) will trigger UAF issue.

The process is as follows:
Receive data:
l2cap_data_channel()
    a2mp_channel_create()  --->channel ref is 2
    l2cap_chan_put()       --->channel ref is 1

Triger event:
    hci_error_reset()
        hci_dev_do_close()
        ...
        l2cap_disconn_cfm()
            l2cap_conn_del()
                l2cap_chan_hold()    --->channel ref is 2
                l2cap_chan_del()     --->channel ref is 1
                a2mp_chan_close_cb() --->channel ref is 0, release channel
                l2cap_chan_unlock()  --->UAF of channel

The detailed Call Trace is as follows:
BUG: KASAN: use-after-free in __mutex_unlock_slowpath+0xa6/0x5e0
Read of size 8 at addr ffff8880160664b8 by task kworker/u11:1/7593
Workqueue: hci0 hci_error_reset
Call Trace:
 <TASK>
 dump_stack_lvl+0xcd/0x134
 print_report.cold+0x2ba/0x719
 kasan_report+0xb1/0x1e0
 kasan_check_range+0x140/0x190
 __mutex_unlock_slowpath+0xa6/0x5e0
 l2cap_conn_del+0x404/0x7b0
 l2cap_disconn_cfm+0x8c/0xc0
 hci_conn_hash_flush+0x11f/0x260
 hci_dev_close_sync+0x5f5/0x11f0
 hci_dev_do_close+0x2d/0x70
 hci_error_reset+0x9e/0x140
 process_one_work+0x98a/0x1620
 worker_thread+0x665/0x1080
 kthread+0x2e4/0x3a0
 ret_from_fork+0x1f/0x30
 </TASK>

Allocated by task 7593:
 kasan_save_stack+0x1e/0x40
 __kasan_kmalloc+0xa9/0xd0
 l2cap_chan_create+0x40/0x930
 amp_mgr_create+0x96/0x990
 a2mp_channel_create+0x7d/0x150
 l2cap_recv_frame+0x51b8/0x9a70
 l2cap_recv_acldata+0xaa3/0xc00
 hci_rx_work+0x702/0x1220
 process_one_work+0x98a/0x1620
 worker_thread+0x665/0x1080
 kthread+0x2e4/0x3a0
 ret_from_fork+0x1f/0x30

Freed by task 7593:
 kasan_save_stack+0x1e/0x40
 kasan_set_track+0x21/0x30
 kasan_set_free_info+0x20/0x30
 ____kasan_slab_free+0x167/0x1c0
 slab_free_freelist_hook+0x89/0x1c0
 kfree+0xe2/0x580
 l2cap_chan_put+0x22a/0x2d0
 l2cap_conn_del+0x3fc/0x7b0
 l2cap_disconn_cfm+0x8c/0xc0
 hci_conn_hash_flush+0x11f/0x260
 hci_dev_close_sync+0x5f5/0x11f0
 hci_dev_do_close+0x2d/0x70
 hci_error_reset+0x9e/0x140
 process_one_work+0x98a/0x1620
 worker_thread+0x665/0x1080
 kthread+0x2e4/0x3a0
 ret_from_fork+0x1f/0x30

Last potentially related work creation:
 kasan_save_stack+0x1e/0x40
 __kasan_record_aux_stack+0xbe/0xd0
 call_rcu+0x99/0x740
 netlink_release+0xe6a/0x1cf0
 __sock_release+0xcd/0x280
 sock_close+0x18/0x20
 __fput+0x27c/0xa90
 task_work_run+0xdd/0x1a0
 exit_to_user_mode_prepare+0x23c/0x250
 syscall_exit_to_user_mode+0x19/0x50
 do_syscall_64+0x42/0x80
 entry_SYSCALL_64_after_hwframe+0x63/0xcd

Second to last potentially related work creation:
 kasan_save_stack+0x1e/0x40
 __kasan_record_aux_stack+0xbe/0xd0
 call_rcu+0x99/0x740
 netlink_release+0xe6a/0x1cf0
 __sock_release+0xcd/0x280
 sock_close+0x18/0x20
 __fput+0x27c/0xa90
 task_work_run+0xdd/0x1a0
 exit_to_user_mode_prepare+0x23c/0x250
 syscall_exit_to_user_mode+0x19/0x50
 do_syscall_64+0x42/0x80
 entry_SYSCALL_64_after_hwframe+0x63/0xcd

Fixes: d0be8347c623 ("Bluetooth: L2CAP: Fix use-after-free caused by l2cap_chan_put")
Signed-off-by: Zhengchao Shao <shaozhengchao@huawei.com>
Signed-off-by: Luiz Augusto von Dentz <luiz.von.dentz@intel.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>

Bluetooth: virtio_bt: Use skb_put to set length

[ Upstream commit 160fbcf3bfb93c3c086427f9f4c8bc70f217e9be ]

By using skb_put we ensure that skb->tail is set
correctly. Currently, skb->tail is always zero, which
leads to errors, such as the following page fault in
rfcomm_recv_frame:

    BUG: unable to handle page fault for address: ffffed1021de29ff
    #PF: supervisor read access in kernel mode
    #PF: error_code(0x0000) - not-present page
    RIP: 0010:rfcomm_run+0x831/0x4040 (net/bluetooth/rfcomm/core.c:1751)

Fixes: afd2daa26c7a ("Bluetooth: Add support for virtio transport driver")
Signed-off-by: Soenke Huster <soenke.huster@eknoes.de>
Signed-off-by: Luiz Augusto von Dentz <luiz.von.dentz@intel.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>

Bluetooth: L2CAP: Fix use-after-free caused by l2cap_reassemble_sdu

[ Upstream commit 3aff8aaca4e36dc8b17eaa011684881a80238966 ]

Fix the race condition between the following two flows that run in
parallel:

1. l2cap_reassemble_sdu -> chan->ops->recv (l2cap_sock_recv_cb) ->
   __sock_queue_rcv_skb.

2. bt_sock_recvmsg -> skb_recv_datagram, skb_free_datagram.

An SKB can be queued by the first flow and immediately dequeued and
freed by the second flow, therefore the callers of l2cap_reassemble_sdu
can't use the SKB after that function returns. However, some places
continue accessing struct l2cap_ctrl that resides in the SKB's CB for a
short time after l2cap_reassemble_sdu returns, leading to a
use-after-free condition (the stack trace is below, line numbers for
kernel 5.19.8).

Fix it by keeping a local copy of struct l2cap_ctrl.

BUG: KASAN: use-after-free in l2cap_rx_state_recv (net/bluetooth/l2cap_core.c:6906) bluetooth
Read of size 1 at addr ffff88812025f2f0 by task kworker/u17:3/43169

Workqueue: hci0 hci_rx_work [bluetooth]
Call Trace:
 <TASK>
 dump_stack_lvl (lib/dump_stack.c:107 (discriminator 4))
 print_report.cold (mm/kasan/report.c:314 mm/kasan/report.c:429)
 ? l2cap_rx_state_recv (net/bluetooth/l2cap_core.c:6906) bluetooth
 kasan_report (mm/kasan/report.c:162 mm/kasan/report.c:493)
 ? l2cap_rx_state_recv (net/bluetooth/l2cap_core.c:6906) bluetooth
 l2cap_rx_state_recv (net/bluetooth/l2cap_core.c:6906) bluetooth
 l2cap_rx (net/bluetooth/l2cap_core.c:7236 net/bluetooth/l2cap_core.c:7271) bluetooth
 ret_from_fork (arch/x86/entry/entry_64.S:306)
 </TASK>

Allocated by task 43169:
 kasan_save_stack (mm/kasan/common.c:39)
 __kasan_slab_alloc (mm/kasan/common.c:45 mm/kasan/common.c:436 mm/kasan/common.c:469)
 kmem_cache_alloc_node (mm/slab.h:750 mm/slub.c:3243 mm/slub.c:3293)
 __alloc_skb (net/core/skbuff.c:414)
 l2cap_recv_frag (./include/net/bluetooth/bluetooth.h:425 net/bluetooth/l2cap_core.c:8329) bluetooth
 l2cap_recv_acldata (net/bluetooth/l2cap_core.c:8442) bluetooth
 hci_rx_work (net/bluetooth/hci_core.c:3642 net/bluetooth/hci_core.c:3832) bluetooth
 process_one_work (kernel/workqueue.c:2289)
 worker_thread (./include/linux/list.h:292 kernel/workqueue.c:2437)
 kthread (kernel/kthread.c:376)
 ret_from_fork (arch/x86/entry/entry_64.S:306)

Freed by task 27920:
 kasan_save_stack (mm/kasan/common.c:39)
 kasan_set_track (mm/kasan/common.c:45)
 kasan_set_free_info (mm/kasan/generic.c:372)
 ____kasan_slab_free (mm/kasan/common.c:368 mm/kasan/common.c:328)
 slab_free_freelist_hook (mm/slub.c:1780)
 kmem_cache_free (mm/slub.c:3536 mm/slub.c:3553)
 skb_free_datagram (./include/net/sock.h:1578 ./include/net/sock.h:1639 net/core/datagram.c:323)
 bt_sock_recvmsg (net/bluetooth/af_bluetooth.c:295) bluetooth
 l2cap_sock_recvmsg (net/bluetooth/l2cap_sock.c:1212) bluetooth
 sock_read_iter (net/socket.c:1087)
 new_sync_read (./include/linux/fs.h:2052 fs/read_write.c:401)
 vfs_read (fs/read_write.c:482)
 ksys_read (fs/read_write.c:620)
 do_syscall_64 (arch/x86/entry/common.c:50 arch/x86/entry/common.c:80)
 entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:120)

Link: https://lore.kernel.org/linux-bluetooth/CAKErNvoqga1WcmoR3-0875esY6TVWFQDandbVZncSiuGPBQXLA@mail.gmail.com/T/#u
Fixes: d2a7ac5d5d3a ("Bluetooth: Add the ERTM receive state machine")
Fixes: 4b51dae96731 ("Bluetooth: Add streaming mode receive and incoming packet classifier")
Signed-off-by: Maxim Mikityanskiy <maxtram95@gmail.com>
Signed-off-by: Luiz Augusto von Dentz <luiz.von.dentz@intel.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>

netfilter: ipset: enforce documented limit to prevent allocating huge memory

[ Upstream commit 510841da1fcc16f702440ab58ef0b4d82a9056b7 ]

Daniel Xu reported that the hash:net,iface type of the ipset subsystem does
not limit adding the same network with different interfaces to a set, which
can lead to huge memory usage or allocation failure.

The quick reproducer is

$ ipset create ACL.IN.ALL_PERMIT hash:net,iface hashsize 1048576 timeout 0
$ for i in $(seq 0 100); do /sbin/ipset add ACL.IN.ALL_PERMIT 0.0.0.0/0,kaf_$i timeout 0 -exist; done

The backtrace when vmalloc fails:

        [Tue Oct 25 00:13:08 2022] ipset: vmalloc error: size 1073741848, exceeds total pages
        <...>
        [Tue Oct 25 00:13:08 2022] Call Trace:
        [Tue Oct 25 00:13:08 2022]  <TASK>
        [Tue Oct 25 00:13:08 2022]  dump_stack_lvl+0x48/0x60
        [Tue Oct 25 00:13:08 2022]  warn_alloc+0x155/0x180
        [Tue Oct 25 00:13:08 2022]  __vmalloc_node_range+0x72a/0x760
        [Tue Oct 25 00:13:08 2022]  ? hash_netiface4_add+0x7c0/0xb20
        [Tue Oct 25 00:13:08 2022]  ? __kmalloc_large_node+0x4a/0x90
        [Tue Oct 25 00:13:08 2022]  kvmalloc_node+0xa6/0xd0
        [Tue Oct 25 00:13:08 2022]  ? hash_netiface4_resize+0x99/0x710
        <...>

The fix is to enforce the limit documented in the ipset(8) manpage:

>  The internal restriction of the hash:net,iface set type is that the same
>  network prefix cannot be stored with more than 64 different interfaces
>  in a single set.

Fixes: ccf0a4b7fc68 ("netfilter: ipset: Add bucketsize parameter to all hash types")
Reported-by: Daniel Xu <dxu@dxuuu.xyz>
Signed-off-by: Jozsef Kadlecsik <kadlec@netfilter.org>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>

btrfs: fix ulist leaks in error paths of qgroup self tests

[ Upstream commit d37de92b38932d40e4a251e876cc388f9aee5f42 ]

In the test_no_shared_qgroup() and test_multiple_refs() qgroup self tests,
if we fail to add the tree ref, remove the extent item or remove the
extent ref, we are returning from the test function without freeing the
"old_roots" ulist that was allocated by the previous calls to
btrfs_find_all_roots(). Fix that by calling ulist_free() before returning.

Fixes: 442244c96332 ("btrfs: qgroup: Switch self test to extent-oriented qgroup mechanism.")
Signed-off-by: Filipe Manana <fdmanana@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>

btrfs: fix inode list leak during backref walking at find_parent_nodes()

[ Upstream commit 92876eec382a0f19f33d09d2c939e9ca49038ae5 ]

During backref walking, at find_parent_nodes(), if we are dealing with a
data extent and we get an error while resolving the indirect backrefs, at
resolve_indirect_refs(), or in the while loop that iterates over the refs
in the direct refs rbtree, we end up leaking the inode lists attached to
the direct refs we have in the direct refs rbtree that were not yet added
to the refs ulist passed as argument to find_parent_nodes(). Since they
were not yet added to the refs ulist and prelim_release() does not free
the lists, on error the caller can only free the lists attached to the
refs that were added to the refs ulist, all the remaining refs get their
inode lists never freed, therefore leaking their memory.

Fix this by having prelim_release() always free any attached inode list
to each ref found in the rbtree, and have find_parent_nodes() set the
ref's inode list to NULL once it transfers ownership of the inode list
to a ref added to the refs ulist passed to find_parent_nodes().

Fixes: 86d5f9944252 ("btrfs: convert prelimary reference tracking to use rbtrees")
Signed-off-by: Filipe Manana <fdmanana@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>

btrfs: fix inode list leak during backref walking at resolve_indirect_refs()

[ Upstream commit 5614dc3a47e3310fbc77ea3b67eaadd1c6417bf1 ]

During backref walking, at resolve_indirect_refs(), if we get an error
we jump to the 'out' label and call ulist_free() on the 'parents' ulist,
which frees all the elements in the ulist - however that does not free
any inode lists that may be attached to elements, through the 'aux' field
of a ulist node, so we end up leaking lists if we have any attached to
the unodes.

Fix this by calling free_leaf_list() instead of ulist_free() when we exit
from resolve_indirect_refs(). The static function free_leaf_list() is
moved up for this to be possible and it's slightly simplified by removing
unnecessary code.

Fixes: 3301958b7c1d ("Btrfs: add inodes before dropping the extent lock in find_all_leafs")
Signed-off-by: Filipe Manana <fdmanana@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>

isdn: mISDN: netjet: fix wrong check of device registration

[ Upstream commit bf00f5426074249058a106a6edbb89e4b25a4d79 ]

The class is set in mISDN_register_device(), but if device_add() returns
error, it will lead to delete a device without added, fix this by using
device_is_registered() to check if the device is registered.

Fixes: a900845e5661 ("mISDN: Add support for Traverse Technologies NETJet PCI cards")
Signed-off-by: Yang Yingliang <yangyingliang@huawei.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Sasha Levin <sashal@kernel.org>

mISDN: fix possible memory leak in mISDN_register_device()

[ Upstream commit e7d1d4d9ac0dfa40be4c2c8abd0731659869b297 ]

Afer commit 1fa5ae857bb1 ("driver core: get rid of struct device's
bus_id string array"), the name of device is allocated dynamically,
add put_device() to give up the reference, so that the name can be
freed in kobject_cleanup() when the refcount is 0.

Set device class before put_device() to avoid null release() function
WARN message in device_release().

Fixes: 1fa5ae857bb1 ("driver core: get rid of struct device's bus_id string array")
Signed-off-by: Yang Yingliang <yangyingliang@huawei.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Sasha Levin <sashal@kernel.org>

rose: Fix NULL pointer dereference in rose_send_frame()

[ Upstream commit e97c089d7a49f67027395ddf70bf327eeac2611e ]

The syzkaller reported an issue:

KASAN: null-ptr-deref in range [0x0000000000000380-0x0000000000000387]
CPU: 0 PID: 4069 Comm: kworker/0:15 Not tainted 6.0.0-syzkaller-02734-g0326074ff465 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/22/2022
Workqueue: rcu_gp srcu_invoke_callbacks
RIP: 0010:rose_send_frame+0x1dd/0x2f0 net/rose/rose_link.c:101
Call Trace:
 <IRQ>
 rose_transmit_clear_request+0x1d5/0x290 net/rose/rose_link.c:255
 rose_rx_call_request+0x4c0/0x1bc0 net/rose/af_rose.c:1009
 rose_loopback_timer+0x19e/0x590 net/rose/rose_loopback.c:111
 call_timer_fn+0x1a0/0x6b0 kernel/time/timer.c:1474
 expire_timers kernel/time/timer.c:1519 [inline]
 __run_timers.part.0+0x674/0xa80 kernel/time/timer.c:1790
 __run_timers kernel/time/timer.c:1768 [inline]
 run_timer_softirq+0xb3/0x1d0 kernel/time/timer.c:1803
 __do_softirq+0x1d0/0x9c8 kernel/softirq.c:571
 [...]
 </IRQ>

It triggers NULL pointer dereference when 'neigh->dev->dev_addr' is
called in the rose_send_frame(). It's the first occurrence of the
`neigh` is in rose_loopback_timer() as `rose_loopback_neigh', and
the 'dev' in 'rose_loopback_neigh' is initialized sa nullptr.

It had been fixed by commit 3b3fd068c56e3fbea30090859216a368398e39bf
("rose: Fix Null pointer dereference in rose_send_frame()") ever.
But it's introduced by commit 3c53cd65dece47dd1f9d3a809f32e59d1d87b2b8
("rose: check NULL rose_loopback_neigh->loopback") again.

We fix it by add NULL check in rose_transmit_clear_request(). When
the 'dev' in 'neigh' is NULL, we don't reply the request and just
clear it.

syzkaller don't provide repro, and I provide a syz repro like:
r0 = syz_init_net_socket$bt_sco(0x1f, 0x5, 0x2)
ioctl$sock_inet_SIOCSIFFLAGS(r0, 0x8914, &(0x7f0000000180)={'rose0\x00', 0x201})
r1 = syz_init_net_socket$rose(0xb, 0x5, 0x0)
bind$rose(r1, &(0x7f00000000c0)=@full={0xb, @dev, @null, 0x0, [@null, @null, @netrom, @netrom, @default, @null]}, 0x40)
connect$rose(r1, &(0x7f0000000240)=@short={0xb, @dev={0xbb, 0xbb, 0xbb, 0x1, 0x0}, @remote={0xcc, 0xcc, 0xcc, 0xcc, 0xcc, 0xcc, 0x1}, 0x1, @netrom={0xbb, 0xbb, 0xbb, 0xbb, 0xbb, 0x0, 0x0}}, 0x1c)

Fixes: 3c53cd65dece ("rose: check NULL rose_loopback_neigh->loopback")
Signed-off-by: Zhang Qilong <zhangqilong3@huawei.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Sasha Levin <sashal@kernel.org>

ipvs: fix WARNING in ip_vs_app_net_cleanup()

[ Upstream commit 5663ed63adb9619c98ab7479aa4606fa9b7a548c ]

During the initialization of ip_vs_app_net_init(), if file ip_vs_app
fails to be created, the initialization is successful by default.
Therefore, the ip_vs_app file doesn't be found during the remove in
ip_vs_app_net_cleanup(). It will cause WRNING.

The following is the stack information:
name 'ip_vs_app'
WARNING: CPU: 1 PID: 9 at fs/proc/generic.c:712 remove_proc_entry+0x389/0x460
Modules linked in:
Workqueue: netns cleanup_net
RIP: 0010:remove_proc_entry+0x389/0x460
Call Trace:
<TASK>
ops_exit_list+0x125/0x170
cleanup_net+0x4ea/0xb00
process_one_work+0x9bf/0x1710
worker_thread+0x665/0x1080
kthread+0x2e4/0x3a0
ret_from_fork+0x1f/0x30
</TASK>

Fixes: 457c4cbc5a3d ("[NET]: Make /proc/net per network namespace")
Signed-off-by: Zhengchao Shao <shaozhengchao@huawei.com>
Acked-by: Julian Anastasov <ja@ssi.bg>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>

ipvs: fix WARNING in __ip_vs_cleanup_batch()

[ Upstream commit 3d00c6a0da8ddcf75213e004765e4a42acc71d5d ]

During the initialization of ip_vs_conn_net_init(), if file ip_vs_conn
or ip_vs_conn_sync fails to be created, the initialization is successful
by default. Therefore, the ip_vs_conn or ip_vs_conn_sync file doesn't
be found during the remove.

The following is the stack information:
name 'ip_vs_conn_sync'
WARNING: CPU: 3 PID: 9 at fs/proc/generic.c:712
remove_proc_entry+0x389/0x460
Modules linked in:
Workqueue: netns cleanup_net
RIP: 0010:remove_proc_entry+0x389/0x460
Call Trace:
<TASK>
__ip_vs_cleanup_batch+0x7d/0x120
ops_exit_list+0x125/0x170
cleanup_net+0x4ea/0xb00
process_one_work+0x9bf/0x1710
worker_thread+0x665/0x1080
kthread+0x2e4/0x3a0
ret_from_fork+0x1f/0x30
</TASK>

Fixes: 61b1ab4583e2 ("IPVS: netns, add basic init per netns.")
Signed-off-by: Zhengchao Shao <shaozhengchao@huawei.com>
Acked-by: Julian Anastasov <ja@ssi.bg>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>

ipvs: use explicitly signed chars

[ Upstream commit 5c26159c97b324dc5174a5713eafb8c855cf8106 ]

The `char` type with no explicit sign is sometimes signed and sometimes
unsigned. This code will break on platforms such as arm, where char is
unsigned. So mark it here as explicitly signed, so that the
todrop_counter decrement and subsequent comparison is correct.

Fixes: 1da177e4c3f4 ("Linux-2.6.12-rc2")
Signed-off-by: Jason A. Donenfeld <Jason@zx2c4.com>
Acked-by: Julian Anastasov <ja@ssi.bg>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>

netfilter: nf_tables: release flow rule object from commit path

[ Upstream commit 26b5934ff4194e13196bedcba373cd4915071d0e ]

No need to postpone this to the commit release path, since no packets
are walking over this object, this is accessed from control plane only.
This helped uncovered UAF triggered by races with the netlink notifier.

Fixes: 9dd732e0bdf5 ("netfilter: nf_tables: memleak flow rule from commit path")
Reported-by: syzbot+8f747f62763bc6c32916@syzkaller.appspotmail.com
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>

netfilter: nf_tables: netlink notifier might race to release objects

[ Upstream commit d4bc8271db21ea9f1c86a1ca4d64999f184d4aae ]

commit release path is invoked via call_rcu and it runs lockless to
release the objects after rcu grace period. The netlink notifier handler
might win race to remove objects that the transaction context is still
referencing from the commit release path.

Call rcu_barrier() to ensure pending rcu callbacks run to completion
if the list of transactions to be destroyed is not empty.

Fixes: 6001a930ce03 ("netfilter: nftables: introduce table ownership")
Reported-by: syzbot+8f747f62763bc6c32916@syzkaller.appspotmail.com
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>

net: tun: fix bugs for oversize packet when napi frags enabled

[ Upstream commit 363a5328f4b0517e59572118ccfb7c626d81dca9 ]

Recently, we got two syzkaller problems because of oversize packet
when napi frags enabled.

One of the problems is because the first seg size of the iov_iter
from user space is very big, it is 2147479538 which is bigger than
the threshold value for bail out early in __alloc_pages(). And
skb->pfmemalloc is true, __kmalloc_reserve() would use pfmemalloc
reserves without __GFP_NOWARN flag. Thus we got a warning as following:

========================================================
WARNING: CPU: 1 PID: 17965 at mm/page_alloc.c:5295 __alloc_pages+0x1308/0x16c4 mm/page_alloc.c:5295
...
Call trace:
 __alloc_pages+0x1308/0x16c4 mm/page_alloc.c:5295
 __alloc_pages_node include/linux/gfp.h:550 [inline]
 alloc_pages_node include/linux/gfp.h:564 [inline]
 kmalloc_large_node+0x94/0x350 mm/slub.c:4038
 __kmalloc_node_track_caller+0x620/0x8e4 mm/slub.c:4545
 __kmalloc_reserve.constprop.0+0x1e4/0x2b0 net/core/skbuff.c:151
 pskb_expand_head+0x130/0x8b0 net/core/skbuff.c:1654
 __skb_grow include/linux/skbuff.h:2779 [inline]
 tun_napi_alloc_frags+0x144/0x610 drivers/net/tun.c:1477
 tun_get_user+0x31c/0x2010 drivers/net/tun.c:1835
 tun_chr_write_iter+0x98/0x100 drivers/net/tun.c:2036

The other problem is because odd IPv6 packets without NEXTHDR_NONE
extension header and have big packet length, it is 2127925 which is
bigger than ETH_MAX_MTU(65535). After ipv6_gso_pull_exthdrs() in
ipv6_gro_receive(), network_header offset and transport_header offset
are all bigger than U16_MAX. That would trigger skb->network_header
and skb->transport_header overflow error, because they are all '__u16'
type. Eventually, it would affect the value for __skb_push(skb, value),
and make it be a big value. After __skb_push() in ipv6_gro_receive(),
skb->data would less than skb->head, an out of bounds memory bug occurred.
That would trigger the problem as following:

==================================================================
BUG: KASAN: use-after-free in eth_type_trans+0x100/0x260
...
Call trace:
 dump_backtrace+0xd8/0x130
 show_stack+0x1c/0x50
 dump_stack_lvl+0x64/0x7c
 print_address_description.constprop.0+0xbc/0x2e8
 print_report+0x100/0x1e4
 kasan_report+0x80/0x120
 __asan_load8+0x78/0xa0
 eth_type_trans+0x100/0x260
 napi_gro_frags+0x164/0x550
 tun_get_user+0xda4/0x1270
 tun_chr_write_iter+0x74/0x130
 do_iter_readv_writev+0x130/0x1ec
 do_iter_write+0xbc/0x1e0
 vfs_writev+0x13c/0x26c

To fix the problems, restrict the packet size less than
(ETH_MAX_MTU - NET_SKB_PAD - NET_IP_ALIGN) which has considered reserved
skb space in napi_alloc_skb() because transport_header is an offset from
skb->head. Add len check in tun_napi_alloc_frags() simply.

Fixes: 90e33d459407 ("tun: enable napi_gro_frags() for TUN/TAP driver")
Signed-off-by: Ziyang Xuan <william.xuanziyang@huawei.com>
Reviewed-by: Eric Dumazet <edumazet@google.com>
Link: https://lore.kernel.org/r/20221029094101.1653855-1-william.xuanziyang@huawei.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>

net: sched: Fix use after free in red_enqueue()

[ Upstream commit 8bdc2acd420c6f3dd1f1c78750ec989f02a1e2b9 ]

We can't use "skb" again after passing it to qdisc_enqueue().  This is
basically identical to commit 2f09707d0c97 ("sch_sfb: Also store skb
len before calling child enqueue").

Fixes: d7f4f332f082 ("sch_red: update backlog as well")
Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Reviewed-by: Eric Dumazet <edumazet@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Sasha Levin <sashal@kernel.org>

ata: pata_legacy: fix pdc20230_set_piomode()

[ Upstream commit 171a93182eccd6e6835d2c86b40787f9f832efaa ]

Clang gives a warning when compiling pata_legacy.c with 'make W=1' about
the 'rt' local variable in pdc20230_set_piomode() being set but unused.
Quite obviously, there is an outb() call missing to write back the updated
variable. Moreover, checking the docs by Petr Soucek revealed that bitwise
AND should have been done with a negated timing mask and the master/slave
timing masks were swapped while updating...

Fixes: 669a5db411d8 ("[libata] Add a bunch of PATA drivers.")
Reported-by: Damien Le Moal <damien.lemoal@opensource.wdc.com>
Signed-off-by: Sergey Shtylyov <s.shtylyov@omp.ru>
Signed-off-by: Damien Le Moal <damien.lemoal@opensource.wdc.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>

net: fec: fix improper use of NETDEV_TX_BUSY

[ Upstream commit 06a4df5863f73af193a4ff7abf7cb04058584f06 ]

The ndo_start_xmit() method must not free skb when returning
NETDEV_TX_BUSY, since caller is going to requeue freed skb.

Fix it by returning NETDEV_TX_OK in case of dma_map_single() fails.

Fixes: 79f339125ea3 ("net: fec: Add software TSO support")
Signed-off-by: Zhang Changzhong <zhangchangzhong@huawei.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Sasha Levin <sashal@kernel.org>

nfc: nfcmrvl: Fix potential memory leak in nfcmrvl_i2c_nci_send()

[ Upstream commit 93d904a734a74c54d945a9884b4962977f1176cd ]

nfcmrvl_i2c_nci_send() will be called by nfcmrvl_nci_send(), and skb
should be freed in nfcmrvl_i2c_nci_send(). However, nfcmrvl_nci_send()
will only free skb when i2c_master_send() return >=0, which means skb
will memleak when i2c_master_send() failed. Free skb no matter whether
i2c_master_send() succeeds.

Fixes: b5b3e23e4cac ("NFC: nfcmrvl: add i2c driver")
Signed-off-by: Shang XiaoJing <shangxiaojing@huawei.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Sasha Levin <sashal@kernel.org>

nfc: s3fwrn5: Fix potential memory leak in s3fwrn5_nci_send()

[ Upstream commit 3a146b7e3099dc7cf3114f627d9b79291e2d2203 ]

s3fwrn5_nci_send() will call s3fwrn5_i2c_write() or s3fwrn82_uart_write(),
and free the skb if write() failed. However, even if the write() run
succeeds, the skb will not be freed in write(). As the result, the skb
will memleak. s3fwrn5_nci_send() should also free the skb when write()
succeeds.

Fixes: c04c674fadeb ("nfc: s3fwrn5: Add driver for Samsung S3FWRN5 NFC Chip")
Signed-off-by: Shang XiaoJing <shangxiaojing@huawei.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Sasha Levin <sashal@kernel.org>

nfc: nxp-nci: Fix potential memory leak in nxp_nci_send()

[ Upstream commit 7bf1ed6aff0f70434bd0cdd45495e83f1dffb551 ]

nxp_nci_send() will call nxp_nci_i2c_write(), and only free skb when
nxp_nci_i2c_write() failed. However, even if the nxp_nci_i2c_write()
run succeeds, the skb will not be freed in nxp_nci_i2c_write(). As the
result, the skb will memleak. nxp_nci_send() should also free the skb
when nxp_nci_i2c_write() succeeds.

Fixes: dece45855a8b ("NFC: nxp-nci: Add support for NXP NCI chips")
Signed-off-by: Shang XiaoJing <shangxiaojing@huawei.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Sasha Levin <sashal@kernel.org>

nfc: fdp: Fix potential memory leak in fdp_nci_send()

[ Upstream commit 8e4aae6b8ca76afb1fb64dcb24be44ba814e7f8a ]

fdp_nci_send() will call fdp_nci_i2c_write that will not free skb in
the function. As a result, when fdp_nci_i2c_write() finished, the skb
will memleak. fdp_nci_send() should free skb after fdp_nci_i2c_write()
finished.

Fixes: a06347c04c13 ("NFC: Add Intel Fields Peak NFC solution driver")
Signed-off-by: Shang XiaoJing <shangxiaojing@huawei.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Sasha Levin <sashal@kernel.org>

net: dsa: fall back to default tagger if we can't load the one from DT

[ Upstream commit a2c65a9d0568b6737c02b54f00b80716a53fac61 ]

DSA tagging protocol drivers can be changed at runtime through sysfs and
at probe time through the device tree (support for the latter was added
later).

When changing through sysfs, it is assumed that the module for the new
tagging protocol was already loaded into the kernel (in fact this is
only a concern for Ocelot/Felix switches, where we have tag_ocelot.ko
and tag_ocelot_8021q.ko; for every other switch, the default and
alternative protocols are compiled within the same .ko, so there is
nothing for the user to load).

The kernel cannot currently call request_module(), because it has no way
of constructing the modalias name of the tagging protocol driver
("dsa_tag-%d", where the number is one of DSA_TAG_PROTO_*_VALUE).
The device tree only contains the string name of the tagging protocol
("ocelot-8021q"), and the only mapping between the string and the
DSA_TAG_PROTO_OCELOT_8021Q_VALUE is present in tag_ocelot_8021q.ko.
So this is a chicken-and-egg situation and dsa_core.ko has nothing based
on which it can automatically request the insertion of the module.

As a consequence, if CONFIG_NET_DSA_TAG_OCELOT_8021Q is built as module,
the switch will forever defer probing.

The long-term solution is to make DSA call request_module() somehow,
but that probably needs some refactoring.

What we can do to keep operating with existing device tree blobs is to
cancel the attempt to change the tagging protocol with the one specified
there, and to remain operating with the default one. Depending on the
situation, the default protocol might still allow some functionality
(in the case of ocelot, it does), and it's better to have that than to
fail to probe.

Fixes: deff710703d8 ("net: dsa: Allow default tag protocol to be overridden from DT")
Link: https://lore.kernel.org/lkml/20221027113248.420216-1-michael@walle.cc/
Reported-by: Heiko Thiery <heiko.thiery@gmail.com>
Reported-by: Michael Walle <michael@walle.cc>
Signed-off-by: Vladimir Oltean <vladimir.oltean@nxp.com>
Tested-by: Michael Walle <michael@walle.cc>
Reviewed-by: Florian Fainelli <f.fainelli@gmail.com>
Link: https://lore.kernel.org/r/20221027145439.3086017-1-vladimir.oltean@nxp.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>

RDMA/qedr: clean up work queue on failure in qedr_alloc_resources()

[ Upstream commit 7a47e077e503feb73d56e491ce89aa73b67a3972 ]

Add a check for if create_singlethread_workqueue() fails and also destroy
the work queue on failure paths.

Fixes: e411e0587e0d ("RDMA/qedr: Add iWARP connection management functions")
Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Link: https://lore.kernel.org/r/Y1gBkDucQhhWj5YM@kili
Signed-off-by: Leon Romanovsky <leon@kernel.org>
Signed-off-by: Jason Gunthorpe <jgg@nvidia.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>

RDMA/core: Fix null-ptr-deref in ib_core_cleanup()

[ Upstream commit 07c0d131cc0fe1f3981a42958fc52d573d303d89 ]

KASAN reported a null-ptr-deref error:

  KASAN: null-ptr-deref in range [0x0000000000000118-0x000000000000011f]
  CPU: 1 PID: 379
  Hardware name: QEMU Standard PC (i440FX + PIIX, 1996)
  RIP: 0010:destroy_workqueue+0x2f/0x740
  RSP: 0018:ffff888016137df8 EFLAGS: 00000202
  ...
  Call Trace:
   ib_core_cleanup+0xa/0xa1 [ib_core]
   __do_sys_delete_module.constprop.0+0x34f/0x5b0
   do_syscall_64+0x3a/0x90
   entry_SYSCALL_64_after_hwframe+0x63/0xcd
  RIP: 0033:0x7fa1a0d221b7
  ...

It is because the fail of roce_gid_mgmt_init() is ignored:

 ib_core_init()
   roce_gid_mgmt_init()
     gid_cache_wq = alloc_ordered_workqueue # fail
 ...
 ib_core_cleanup()
   roce_gid_mgmt_cleanup()
     destroy_workqueue(gid_cache_wq)
     # destroy an unallocated wq

Fix this by catching the fail of roce_gid_mgmt_init() in ib_core_init().

Fixes: 03db3a2d81e6 ("IB/core: Add RoCE GID table management")
Signed-off-by: Chen Zhongjin <chenzhongjin@huawei.com>
Link: https://lore.kernel.org/r/20221025024146.109137-1-chenzhongjin@huawei.com
Signed-off-by: Leon Romanovsky <leon@kernel.org>
Signed-off-by: Jason Gunthorpe <jgg@nvidia.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>

net: dsa: Fix possible memory leaks in dsa_loop_init()

[ Upstream commit 633efc8b3dc96f56f5a57f2a49764853a2fa3f50 ]

kmemleak reported memory leaks in dsa_loop_init():

kmemleak: 12 new suspected memory leaks

unreferenced object 0xffff8880138ce000 (size 2048):
  comm "modprobe", pid 390, jiffies 4295040478 (age 238.976s)
  backtrace:
    [<000000006a94f1d5>] kmalloc_trace+0x26/0x60
    [<00000000a9c44622>] phy_device_create+0x5d/0x970
    [<00000000d0ee2afc>] get_phy_device+0xf3/0x2b0
    [<00000000dca0c71f>] __fixed_phy_register.part.0+0x92/0x4e0
    [<000000008a834798>] fixed_phy_register+0x84/0xb0
    [<0000000055223fcb>] dsa_loop_init+0xa9/0x116 [dsa_loop]
    ...

There are two reasons for memleak in dsa_loop_init().

First, fixed_phy_register() create and register phy_device:

fixed_phy_register()
  get_phy_device()
    phy_device_create() # freed by phy_device_free()
  phy_device_register() # freed by phy_device_remove()

But fixed_phy_unregister() only calls phy_device_remove().
So the memory allocated in phy_device_create() is leaked.

Second, when mdio_driver_register() fail in dsa_loop_init(),
it just returns and there is no cleanup for phydevs.

Fix the problems by catching the error of mdio_driver_register()
in dsa_loop_init(), then calling both fixed_phy_unregister() and
phy_device_free() to release phydevs.
Also add a function for phydevs cleanup to avoid duplacate.

Fixes: 98cd1552ea27 ("net: dsa: Mock-up driver")
Signed-off-by: Chen Zhongjin <chenzhongjin@huawei.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Sasha Levin <sashal@kernel.org>

nfs4: Fix kmemleak when allocate slot failed

[ Upstream commit 7e8436728e22181c3f12a5dbabd35ed3a8b8c593 ]

If one of the slot allocate failed, should cleanup all the other
allocated slots, otherwise, the allocated slots will leak:

  unreferenced object 0xffff8881115aa100 (size 64):
    comm ""mount.nfs"", pid 679, jiffies 4294744957 (age 115.037s)
    hex dump (first 32 bytes):
      00 cc 19 73 81 88 ff ff 00 a0 5a 11 81 88 ff ff  ...s......Z.....
      00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00  ................
    backtrace:
      [<000000007a4c434a>] nfs4_find_or_create_slot+0x8e/0x130
      [<000000005472a39c>] nfs4_realloc_slot_table+0x23f/0x270
      [<00000000cd8ca0eb>] nfs40_init_client+0x4a/0x90
      [<00000000128486db>] nfs4_init_client+0xce/0x270
      [<000000008d2cacad>] nfs4_set_client+0x1a2/0x2b0
      [<000000000e593b52>] nfs4_create_server+0x300/0x5f0
      [<00000000e4425dd2>] nfs4_try_get_tree+0x65/0x110
      [<00000000d3a6176f>] vfs_get_tree+0x41/0xf0
      [<0000000016b5ad4c>] path_mount+0x9b3/0xdd0
      [<00000000494cae71>] __x64_sys_mount+0x190/0x1d0
      [<000000005d56bdec>] do_syscall_64+0x35/0x80
      [<00000000687c9ae4>] entry_SYSCALL_64_after_hwframe+0x46/0xb0

Fixes: abf79bb341bf ("NFS: Add a slot table to struct nfs_client for NFSv4.0 transport blocking")
Signed-off-by: Zhang Xiaoxu <zhangxiaoxu5@huawei.com>
Signed-off-by: Anna Schumaker <Anna.Schumaker@Netapp.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>

NFSv4.2: Fixup CLONE dest file size for zero-length count

[ Upstream commit 038efb6348ce96228f6828354cb809c22a661681 ]

When holding a delegation, the NFS client optimizes away setting the
attributes of a file from the GETATTR in the compound after CLONE, and for
a zero-length CLONE we will end up setting the inode's size to zero in
nfs42_copy_dest_done().  Handle this case by computing the resulting count
from the server's reported size after CLONE's GETATTR.

Suggested-by: Trond Myklebust <trond.myklebust@hammerspace.com>
Signed-off-by: Benjamin Coddington <bcodding@redhat.com>
Fixes: 94d202d5ca39 ("NFSv42: Copy offload should update the file size when appropriate")
Signed-off-by: Anna Schumaker <Anna.Schumaker@Netapp.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>

SUNRPC: Fix null-ptr-deref when xps sysfs alloc failed

[ Upstream commit cbdeaee94a415800c65a8c3fa04d9664a8b8fb3a ]

There is a null-ptr-deref when xps sysfs alloc failed:
  BUG: KASAN: null-ptr-deref in sysfs_do_create_link_sd+0x40/0xd0
  Read of size 8 at addr 0000000000000030 by task gssproxy/457

  CPU: 5 PID: 457 Comm: gssproxy Not tainted 6.0.0-09040-g02357b27ee03 #9
  Call Trace:
   <TASK>
   dump_stack_lvl+0x34/0x44
   kasan_report+0xa3/0x120
   sysfs_do_create_link_sd+0x40/0xd0
   rpc_sysfs_client_setup+0x161/0x1b0
   rpc_new_client+0x3fc/0x6e0
   rpc_create_xprt+0x71/0x220
   rpc_create+0x1d4/0x350
   gssp_rpc_create+0xc3/0x160
   set_gssp_clnt+0xbc/0x140
   write_gssp+0x116/0x1a0
   proc_reg_write+0xd6/0x130
   vfs_write+0x177/0x690
   ksys_write+0xb9/0x150
   do_syscall_64+0x35/0x80
   entry_SYSCALL_64_after_hwframe+0x46/0xb0

When the xprt_switch sysfs alloc failed, should not add xprt and
switch sysfs to it, otherwise, maybe null-ptr-deref; also initialize
the 'xps_sysfs' to NULL to avoid oops when destroy it.

Fixes: 2a338a543163 ("sunrpc: add a symlink from rpc-client directory to the xprt_switch")
Fixes: d408ebe04ac5 ("sunrpc: add add sysfs directory per xprt under each xprt_switch")
Fixes: baea99445dd4 ("sunrpc: add xprt_switch direcotry to sunrpc's sysfs")
Signed-off-by: Zhang Xiaoxu <zhangxiaoxu5@huawei.com>
Signed-off-by: Anna Schumaker <Anna.Schumaker@Netapp.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>

NFSv4.1: We must always send RECLAIM_COMPLETE after a reboot

[ Upstream commit e59679f2b7e522ecad99974e5636291ffd47c184 ]

Currently, we are only guaranteed to send RECLAIM_COMPLETE if we have
open state to recover. Fix the client to always send RECLAIM_COMPLETE
after setting up the lease.

Fixes: fce5c838e133 ("nfs41: RECLAIM_COMPLETE functionality")
Signed-off-by: Trond Myklebust <trond.myklebust@hammerspace.com>
Signed-off-by: Anna Schumaker <Anna.Schumaker@Netapp.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>

NFSv4.1: Handle RECLAIM_COMPLETE trunking errors

[ Upstream commit 5d917cba3201e5c25059df96c29252fd99c4f6a7 ]

If RECLAIM_COMPLETE sets the NFS4CLNT_BIND_CONN_TO_SESSION flag, then we
need to loop back in order to handle it.

Fixes: 0048fdd06614 ("NFSv4.1: RECLAIM_COMPLETE must handle NFS4ERR_CONN_NOT_BOUND_TO_SESSION")
Signed-off-by: Trond Myklebust <trond.myklebust@hammerspace.com>
Signed-off-by: Anna Schumaker <Anna.Schumaker@Netapp.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>

NFSv4: Fix a potential state reclaim deadlock

[ Upstream commit 1ba04394e028ea8b45d92685cc0d6ab582cf7647 ]

If the server reboots while we are engaged in a delegation return, and
there is a pNFS layout with return-on-close set, then the current code
can end up deadlocking in pnfs_roc() when nfs_inode_set_delegation()
tries to return the old delegation.
Now that delegreturn actually uses its own copy of the stateid, it
should be safe to just always update the delegation stateid in place.

Fixes: 078000d02d57 ("pNFS: We want return-on-close to complete when evicting the inode")
Signed-off-by: Trond Myklebust <trond.myklebust@hammerspace.com>
Signed-off-by: Anna Schumaker <Anna.Schumaker@Netapp.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>

RDMA/hns: Disable local invalidate operation

[ Upstream commit 9e272ed69ad6f6952fafd0599d6993575512408e ]

When function reset and local invalidate are mixed, HNS RoCEE may hang.
Before introducing the cause of the problem, two hardware internal
concepts need to be introduced:

    1. Execution queue: The queue of hardware execution instructions,
    function reset and local invalidate are queued for execution in this
    queue.

    2.Local queue: A queue that stores local operation instructions. The
    instructions in the local queue will be sent to the execution queue
    for execution. The instructions in the local queue will not be removed
    until the execution is completed.

The reason for the problem is as follows:

    1. There is a function reset instruction in the execution queue, which
    is currently being executed. A necessary condition for the successful
    execution of function reset is: the hardware pipeline needs to empty
    the instructions that were not completed before;

    2. A local invalidate instruction at the head of the local queue is
    sent to the execution queue. Now there are two instructions in the
    execution queue, the first is the function reset instruction, and the
    second is the local invalidate instruction, which will be executed in
    se quence;

    3. The user has issued many local invalidate operations, causing the
    local queue to be filled up.

    4. The user still has a new local operation command and is queuing to
    enter the local queue. But the local queue is full and cannot receive
    new instructions, this instruction is temporarily stored at the
    hardware pipeline.

    5. The function reset has been waiting for the instruction before the
    hardware pipeline stage is drained. The hardware pipeline stage also
    caches a local invalidate instruction, so the function reset cannot be
    completed, and the instructions after it cannot be executed.

These factors together cause the execution logic deadlock of the hardware,
and the consequence is that RoCEE will not have any response.  Considering
that the local operation command may potentially cause RoCEE to hang, this
feature is no longer supported.

Fixes: e93df0108579 ("RDMA/hns: Support local invalidate for hip08 in kernel space")
Signed-off-by: Yangyang Li <liyangyang20@huawei.com>
Signed-off-by: Wenpeng Liang <liangwenpeng@huawei.com>
Signed-off-by: Haoyue Xu <xuhaoyue1@hisilicon.com>
Link: https://lore.kernel.org/r/20221024083814.1089722-2-xuhaoyue1@hisilicon.com
Signed-off-by: Leon Romanovsky <leon@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>

RDMA/hns: Use hr_reg_xxx() instead of remaining roce_set_xxx()

[ Upstream commit 82600b2d3cd57428bdb03c66ae67708d3c8f7281 ]

To reduce the code size and make the code clearer, replace all
roce_set_xxx() with hr_reg_xxx() to write the data fields.

Link: https://lore.kernel.org/r/20220512080012.38728-2-liangwenpeng@huawei.com
Signed-off-by: Wenpeng Liang <liangwenpeng@huawei.com>
Signed-off-by: Jason Gunthorpe <jgg@nvidia.com>
Stable-dep-of: 9e272ed69ad6 ("RDMA/hns: Disable local invalidate operation")
Signed-off-by: Sasha Levin <sashal@kernel.org>

RDMA/hns: Remove magic number

[ Upstream commit 9c3631d17054a8766dbdc1abf8d29306260e7c7f ]

Don't use unintelligible constants.

Link: https://lore.kernel.org/r/20211119140208.40416-10-liangwenpeng@huawei.com
Signed-off-by: Xinhao Liu <liuxinhao5@hisilicon.com>
Signed-off-by: Wenpeng Liang <liangwenpeng@huawei.com>
Signed-off-by: Jason Gunthorpe <jgg@nvidia.com>
Stable-dep-of: 9e272ed69ad6 ("RDMA/hns: Disable local invalidate operation")
Signed-off-by: Sasha Levin <sashal@kernel.org>

IB/hfi1: Correctly move list in sc_disable()

[ Upstream commit 1afac08b39d85437187bb2a92d89a741b1078f55 ]

Commit 13bac861952a ("IB/hfi1: Fix abba locking issue with sc_disable()")
incorrectly tries to move a list from one list head to another.  The
result is a kernel crash.

The crash is triggered when a link goes down and there are waiters for a
send to complete.  The following signature is seen:

  BUG: kernel NULL pointer dereference, address: 0000000000000030
  [...]
  Call Trace:
   sc_disable+0x1ba/0x240 [hfi1]
   pio_freeze+0x3d/0x60 [hfi1]
   handle_freeze+0x27/0x1b0 [hfi1]
   process_one_work+0x1b0/0x380
   ? process_one_work+0x380/0x380
   worker_thread+0x30/0x360
   ? process_one_work+0x380/0x380
   kthread+0xd7/0x100
   ? kthread_complete_and_exit+0x20/0x20
   ret_from_fork+0x1f/0x30

The fix is to use the correct call to move the list.

Fixes: 13bac861952a ("IB/hfi1: Fix abba locking issue with sc_disable()")
Signed-off-by: Dean Luick <dean.luick@cornelisnetworks.com>
Signed-off-by: Dennis Dalessandro <dennis.dalessandro@cornelisnetworks.com>
Link: https://lore.kernel.org/r/166610327042.674422.6146908799669288976.stgit@awfm-02.cornelisnetworks.com
Signed-off-by: Leon Romanovsky <leon@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>

RDMA/cma: Use output interface for net_dev check

[ Upstream commit eb83f502adb036cd56c27e13b9ca3b2aabfa790b ]

Commit 27cfde795a96 ("RDMA/cma: Fix arguments order in net device
validation") swapped the src and dst addresses in the call to
validate_net_dev().

As a consequence, the test in validate_ipv4_net_dev() to see if the
net_dev is the right one, is incorrect for port 1 <-> 2 communication when
the ports are on the same sub-net. This is fixed by denoting the
flowi4_oif as the device instead of the incoming one.

The bug has not been observed using IPv6 addresses.

Fixes: 27cfde795a96 ("RDMA/cma: Fix arguments order in net device validation")
Signed-off-by: Håkon Bugge <haakon.bugge@oracle.com>
Link: https://lore.kernel.org/r/20221012141542.16925-1-haakon.bugge@oracle.com
Reviewed-by: Leon Romanovsky <leonro@nvidia.com>
Signed-off-by: Leon Romanovsky <leon@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>

KVM: x86: Add compat handler for KVM_X86_SET_MSR_FILTER

[ Upstream commit 1739c7017fb1d759965dcbab925ff5980a5318cb ]

The KVM_X86_SET_MSR_FILTER ioctls contains a pointer in the passed in
struct which means it has a different struct size depending on whether
it gets called from 32bit or 64bit code.

This patch introduces compat code that converts from the 32bit struct to
its 64bit counterpart which then gets used going forward internally.
With this applied, 32bit QEMU can successfully set MSR bitmaps when
running on 64bit kernels.

Reported-by: Andrew Randrianasulu <randrianasulu@gmail.com>
Fixes: 1a155254ff937 ("KVM: x86: Introduce MSR filtering")
Signed-off-by: Alexander Graf <graf@amazon.com>
Message-Id: <20221017184541.2658-4-graf@amazon.com>
Cc: stable@vger.kernel.org
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>

KVM: x86: Copy filter arg outside kvm_vm_ioctl_set_msr_filter()

[ Upstream commit 2e3272bc1790825c43d2c39690bf2836b81c6d36 ]

In the next patch we want to introduce a second caller to
set_msr_filter() which constructs its own filter list on the stack.
Refactor the original function so it takes it as argument instead of
reading it through copy_from_user().

Signed-off-by: Alexander Graf <graf@amazon.com>
Message-Id: <20221017184541.2658-3-graf@amazon.com>
Cc: stable@vger.kernel.org
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>

KVM: x86: Protect the unused bits in MSR exiting flags

[ Upstream commit cf5029d5dd7cb0aaa53250fa9e389abd231606b3 ]

The flags for KVM_CAP_X86_USER_SPACE_MSR and KVM_X86_SET_MSR_FILTER
have no protection for their unused bits.  Without protection, future
development for these features will be difficult.  Add the protection
needed to make it possible to extend these features in the future.

Signed-off-by: Aaron Lewis <aaronlewis@google.com>
Message-Id: <20220714161314.1715227-1-aaronlewis@google.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Stable-dep-of: 2e3272bc1790 ("KVM: x86: Copy filter arg outside kvm_vm_ioctl_set_msr_filter()")
Signed-off-by: Sasha Levin <sashal@kernel.org>

HID: playstation: add initial DualSense Edge controller support

[ Upstream commit b8a968efab301743fd659b5649c5d7d3e30e63a6 ]

Provide initial support for the DualSense Edge controller. The brings
support up to the level of the original DualSense, but won't yet provide
support for new features (e.g. reprogrammable buttons).

Signed-off-by: Roderick Colenbrander <roderick.colenbrander@sony.com>
CC: stable@vger.kernel.org
Signed-off-by: Benjamin Tissoires <benjamin.tissoires@redhat.com>
Link: https://lore.kernel.org/r/20221010212313.78275-3-roderick.colenbrander@sony.com
Signed-off-by: Sasha Levin <sashal@kernel.org>

mm/hugetlb: fix races when looking up a CONT-PTE/PMD size hugetlb page

[ Upstream commit fac35ba763ed07ba93154c95ffc0c4a55023707f ]

On some architectures (like ARM64), it can support CONT-PTE/PMD size
hugetlb, which means it can support not only PMD/PUD size hugetlb (2M and
1G), but also CONT-PTE/PMD size(64K and 32M) if a 4K page size specified.

So when looking up a CONT-PTE size hugetlb page by follow_page(), it will
use pte_offset_map_lock() to get the pte entry lock for the CONT-PTE size
hugetlb in follow_page_pte().  However this pte entry lock is incorrect
for the CONT-PTE size hugetlb, since we should use huge_pte_lock() to get
the correct lock, which is mm->page_table_lock.

That means the pte entry of the CONT-PTE size hugetlb under current pte
lock is unstable in follow_page_pte(), we can continue to migrate or
poison the pte entry of the CONT-PTE size hugetlb, which can cause some
potential race issues, even though they are under the 'pte lock'.

For example, suppose thread A is trying to look up a CONT-PTE size hugetlb
page by move_pages() syscall under the lock, however antoher thread B can
migrate the CONT-PTE hugetlb page at the same time, which will cause
thread A to get an incorrect page, if thread A also wants to do page
migration, then data inconsistency error occurs.

Moreover we have the same issue for CONT-PMD size hugetlb in
follow_huge_pmd().

To fix above issues, rename the follow_huge_pmd() as follow_huge_pmd_pte()
to handle PMD and PTE level size hugetlb, which uses huge_pte_lock() to
get the correct pte entry lock to make the pte entry stable.

Mike said:

Support for CONT_PMD/_PTE was added with bb9dd3df8ee9 ("arm64: hugetlb:
refactor find_num_contig()").  Patch series "Support for contiguous pte
hugepages", v4.  However, I do not believe these code paths were
executed until migration support was added with 5480280d3f2d ("arm64/mm:
enable HugeTLB migration for contiguous bit HugeTLB pages") I would go
with 5480280d3f2d for the Fixes: targe.

Link: https://lkml.kernel.org/r/635f43bdd85ac2615a58405da82b4d33c6e5eb05.1662017562.git.baolin.wang@linux.alibaba.com
Fixes: 5480280d3f2d ("arm64/mm: enable HugeTLB migration for contiguous bit HugeTLB pages")
Signed-off-by: Baolin Wang <baolin.wang@linux.alibaba.com>
Suggested-by: Mike Kravetz <mike.kravetz@oracle.com>
Reviewed-by: Mike Kravetz <mike.kravetz@oracle.com>
Cc: David Hildenbrand <david@redhat.com>
Cc: Muchun Song <songmuchun@bytedance.com>
Cc: <stable@vger.kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>

drm/amd/display: explicitly disable psr_feature_enable appropriately

[ Upstream commit 6094b9136ca9038b61e9c4b5d25cd5512ce50b34 ]

[Why]
If psr_feature_enable is set to true by default, it continues to be enabled
for non capable links.

[How]
explicitly disable the feature on links that are not capable of the same.

Fixes: 8c322309e48e9 ("drm/amd/display: Enable PSR")
Signed-off-by: Shirish S <shirish.s@amd.com>
Reviewed-by: Leo Li <sunpeng.li@amd.com>
Reviewed-by: Mario Limonciello <mario.limonciello@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Cc: stable@vger.kernel.org # 5.15+
Signed-off-by: Sasha Levin <sashal@kernel.org>

KVM: x86: Treat #DBs from the emulator as fault-like (code and DR7.GD=1)

[ Upstream commit 5623f751bd9c438ed12840e086f33c4646440d19 ]

Add a dedicated "exception type" for #DBs, as #DBs can be fault-like or
trap-like depending the sub-type of #DB, and effectively defer the
decision of what to do with the #DB to the caller.

For the emulator's two calls to exception_type(), treat the #DB as
fault-like, as the emulator handles only code breakpoint and general
detect #DBs, both of which are fault-like.

For event injection, which uses exception_type() to determine whether to
set EFLAGS.RF=1 on the stack, keep the current behavior of not setting
RF=1 for #DBs.  Intel and AMD explicitly state RF isn't set on code #DBs,
so exempting by failing the "== EXCPT_FAULT" check is correct.  The only
other fault-like #DB is General Detect, and despite Intel and AMD both
strongly implying (through omission) that General Detect #DBs should set
RF=1, hardware (multiple generations of both Intel and AMD), in fact does
not.  Through insider knowledge, extreme foresight, sheer dumb luck, or
some combination thereof, KVM correctly handled RF for General Detect #DBs.

Fixes: 38827dbd3fb8 ("KVM: x86: Do not update EFLAGS on faulting emulation")
Cc: stable@vger.kernel.org
Signed-off-by: Sean Christopherson <seanjc@google.com>
Reviewed-by: Maxim Levitsky <mlevitsk@redhat.com>
Link: https://lore.kernel.org/r/20220830231614.3580124-9-seanjc@google.com
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>

KVM: x86: Trace re-injected exceptions

[ Upstream commit a61d7c5432ac5a953bbcec17af031661c2bd201d ]

Trace exceptions that are re-injected, not just those that KVM is
injecting for the first time.  Debugging re-injection bugs is painful
enough as is, not having visibility into what KVM is doing only makes
things worse.

Delay propagating pending=>injected in the non-reinjection path so that
the tracing can properly identify reinjected exceptions.

Signed-off-by: Sean Christopherson <seanjc@google.com>
Reviewed-by: Maxim Levitsky <mlevitsk@redhat.com>
Signed-off-by: Maciej S. Szmigiero <maciej.szmigiero@oracle.com>
Message-Id: <25470690a38b4d2b32b6204875dd35676c65c9f2.1651440202.git.maciej.szmigiero@oracle.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Stable-dep-of: 5623f751bd9c ("KVM: x86: Treat #DBs from the emulator as fault-like (code and DR7.GD=1)")
Signed-off-by: Sasha Levin <sashal@kernel.org>

serial: ar933x: Deassert Transmit Enable on ->rs485_config()

commit 3a939433ddc1bab98be028903aaa286e5e7461d7 upstream.

The ar933x_uart driver neglects to deassert Transmit Enable when
->rs485_config() is invoked.  Fix it.

Fixes: 9be1064fe524 ("serial: ar933x_uart: add RS485 support")
Cc: stable@vger.kernel.org # v5.7+
Cc: Daniel Golle <daniel@makrotopia.org>
Reviewed-by: Ilpo JÀrvinen <ilpo.jarvinen@linux.intel.com>
Signed-off-by: Lukas Wunner <lukas@wunner.de>
Signed-off-by: Sasha Levin <sashal@kernel.org>