platform/kernel/linux-rpi.git
4 years agoInput: goldfish_events - replace zero-length array with flexible-array member
Gustavo A. R. Silva [Fri, 14 Feb 2020 00:56:48 +0000 (16:56 -0800)]
Input: goldfish_events - replace zero-length array with flexible-array member

The current codebase makes use of the zero-length array language
extension to the C90 standard, but the preferred mechanism to declare
variable-length types such as these ones is a flexible array member[1][2],
introduced in C99:

struct foo {
        int stuff;
        struct boo array[];
};

By making use of the mechanism above, we will get a compiler warning
in case the flexible array does not occur last in the structure, which
will help us prevent some kind of undefined behavior bugs from being
inadvertently introduced[3] to the codebase from now on.

Also, notice that, dynamic memory allocations won't be affected by
this change:

"Flexible array members have incomplete type, and so the sizeof operator
may not be applied. As a quirk of the original implementation of
zero-length arrays, sizeof evaluates to zero."[1]

This issue was found with the help of Coccinelle.

[1] https://gcc.gnu.org/onlinedocs/gcc/Zero-Length.html
[2] https://github.com/KSPP/linux/issues/21
[3] commit 76497732932f ("cxgb3/l2t: Fix undefined behaviour")

Signed-off-by: Gustavo A. R. Silva <gustavo@embeddedor.com>
Link: https://lore.kernel.org/r/20200213002430.GA31056@embeddedor.com
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
4 years agoio_uring: prune request from overflow list on flush
Jens Axboe [Fri, 14 Feb 2020 00:17:35 +0000 (17:17 -0700)]
io_uring: prune request from overflow list on flush

Carter reported an issue where he could produce a stall on ring exit,
when we're cleaning up requests that match the given file table. For
this particular test case, a combination of a few things caused the
issue:

- The cq ring was overflown
- The request being canceled was in the overflow list

The combination of the above means that the cq overflow list holds a
reference to the request. The request is canceled correctly, but since
the overflow list holds a reference to it, the final put won't happen.
Since the final put doesn't happen, the request remains in the inflight.
Hence we never finish the cancelation flush.

Fix this by removing requests from the overflow list if we're canceling
them.

Cc: stable@vger.kernel.org # 5.5
Reported-by: Carter Li 李通洲 <carter.li@eoitek.com>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
4 years agoMerge tag 'arm64-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux
Linus Torvalds [Thu, 13 Feb 2020 22:36:57 +0000 (14:36 -0800)]
Merge tag 'arm64-fixes' of git://git./linux/kernel/git/arm64/linux

Pull arm64 fixes from Will Deacon:
 "Summary below, but it's all reasonably straightforward. There are some
  more fixes on the horizon, but nothing disastrous yet.

  Summary:

   - Fix build when KASLR is enabled but CONFIG_ARCH_RANDOM is not set

   - Fix context-switching of SSBS state on systems that implement it

   - Fix spinlock compiler warning introduced during the merge window

   - Fix incorrect header inclusion (linux/clk-provider.h)

   - Use SYSCTL_{ZERO,ONE} instead of rolling our own static variables

   - Don't scream if optional SMMUv3 PMU irq is missing

   - Remove some unused function prototypes"

* tag 'arm64-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux:
  arm64: time: Replace <linux/clk-provider.h> by <linux/of_clk.h>
  arm64: Fix CONFIG_ARCH_RANDOM=n build
  perf/smmuv3: Use platform_get_irq_optional() for wired interrupt
  arm64/spinlock: fix a -Wunused-function warning
  arm64: ssbs: Fix context-switch when SSBS is present on all CPUs
  arm64: use shared sysctl constants
  arm64: Drop do_el0_ia_bp_hardening() & do_sp_pc_abort() declarations

4 years agoMerge tag 'gpio-v5.6-2' of git://git.kernel.org/pub/scm/linux/kernel/git/linusw/linux...
Linus Torvalds [Thu, 13 Feb 2020 22:34:58 +0000 (14:34 -0800)]
Merge tag 'gpio-v5.6-2' of git://git./linux/kernel/git/linusw/linux-gpio

Pull GPIO fixes from Linus Walleij:

 - Revert two patches to gpio_do_set_config() and implement the proper
   solution that works, also drop an unecessary call in set_config()

 - Fix up the lockdep class for hierarchical IRQ domains.

 - Remove some bridge code for line directions.

 - Fix a register access bug in the Xilinx driver.

* tag 'gpio-v5.6-2' of git://git.kernel.org/pub/scm/linux/kernel/git/linusw/linux-gpio:
  gpio: sifive: fix static checker warning
  spmi: pmic-arb: Set lockdep class for hierarchical irq domains
  gpio: xilinx: Fix bug where the wrong GPIO register is written to
  gpiolib: remove unnecessary argument from set_config call
  gpio: bd71828: Remove unneeded defines for GPIO_LINE_DIRECTION_IN/OUT
  MAINTAINERS: Sort entries in database for GPIO
  gpiolib: fix gpio_do_set_config()
  Revert "gpiolib: remove set but not used variable 'config'"
  Revert "gpiolib: Remove duplicated function gpio_do_set_config()"

4 years agoMerge branch 'icmp-account-for-NAT-when-sending-icmps-from-ndo-layer'
David S. Miller [Thu, 13 Feb 2020 22:19:00 +0000 (14:19 -0800)]
Merge branch 'icmp-account-for-NAT-when-sending-icmps-from-ndo-layer'

Jason A. Donenfeld says:

====================
icmp: account for NAT when sending icmps from ndo layer

The ICMP routines use the source address for two reasons:

1. Rate-limiting ICMP transmissions based on source address, so
   that one source address cannot provoke a flood of replies. If
   the source address is wrong, the rate limiting will be
   incorrectly applied.

2. Choosing the interface and hence new source address of the
   generated ICMP packet. If the original packet source address
   is wrong, ICMP replies will be sent from the wrong source
   address, resulting in either a misdelivery, infoleak, or just
   general network admin confusion.

Most of the time, the icmp_send and icmpv6_send routines can just reach
down into the skb's IP header to determine the saddr. However, if
icmp_send or icmpv6_send is being called from a network device driver --
there are a few in the tree -- then it's possible that by the time
icmp_send or icmpv6_send looks at the packet, the packet's source
address has already been transformed by SNAT or MASQUERADE or some other
transformation that CONNTRACK knows about. In this case, the packet's
source address is most certainly the *wrong* source address to be used
for the purpose of ICMP replies.

Rather, the source address we want to use for ICMP replies is the
original one, from before the transformation occurred.

Fortunately, it's very easy to just ask CONNTRACK if it knows about this
packet, and if so, how to fix it up. The saddr is the only field in the
header we need to fix up, for the purposes of the subsequent processing
in the icmp_send and icmpv6_send functions, so we do the lookup very
early on, so that the rest of the ICMP machinery can progress as usual.

Changes v3->v4:
- Add back the skb_shared checking, since the previous assumption isn't
  actually true [Eric]. This implies dropping the additional patches v3 had
  for removing skb_share_check from various drivers. We can revisit that
  general set of ideas later, but that's probably better suited as a net-next
  patchset rather than this stable one which is geared at fixing bugs. So,
  this implements things in the safe conservative way.

Changes v2->v3:
- Add selftest to ensure this actually does what we want and never regresses.
- Check the size of the skb header before operating on it.
- Use skb_ensure_writable to ensure we can modify the cloned skb [Florian].
- Conditionalize this on IPS_SRC_NAT so we don't do anything unnecessarily
  [Florian].
- It turns out that since we're calling these from the xmit path,
  skb_share_check isn't required, so remove that [Florian]. This simplifes the
  code a bit too. **The supposition here is that skbs passed to ndo_start_xmit
  are _never_ shared. If this is not correct NOW IS THE TIME TO PIPE UP, for
  doom awaits us later.**
- While investigating the shared skb business, several drivers appeared to be
  calling it incorrectly in the xmit path, so this series also removes those
  unnecessary calls, based on the supposition mentioned in the previous point.

Changes v1->v2:
- icmpv6 takes subtly different types than icmpv4, like u32 instead of be32,
  u8 instead of int.
- Since we're technically writing to the skb, we need to make sure it's not
  a shared one [Dave, 2017].
- Restore the original skb data after icmp_send returns. All current users
  are freeing the packet right after, so it doesn't matter, but future users
  might not.
- Remove superfluous route lookup in sunvnet [Dave].
- Use NF_NAT instead of NF_CONNTRACK for condition [Florian].
- Include this cover letter [Dave].
====================

Signed-off-by: David S. Miller <davem@davemloft.net>
4 years agoxfrm: interface: use icmp_ndo_send helper
Jason A. Donenfeld [Tue, 11 Feb 2020 19:47:09 +0000 (20:47 +0100)]
xfrm: interface: use icmp_ndo_send helper

Because xfrmi is calling icmp from network device context, it should use
the ndo helper so that the rate limiting applies correctly.

Signed-off-by: Jason A. Donenfeld <Jason@zx2c4.com>
Cc: Nicolas Dichtel <nicolas.dichtel@6wind.com>
Cc: Steffen Klassert <steffen.klassert@secunet.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
4 years agowireguard: device: use icmp_ndo_send helper
Jason A. Donenfeld [Tue, 11 Feb 2020 19:47:08 +0000 (20:47 +0100)]
wireguard: device: use icmp_ndo_send helper

Because wireguard is calling icmp from network device context, it should
use the ndo helper so that the rate limiting applies correctly.  This
commit adds a small test to the wireguard test suite to ensure that the
new functions continue doing the right thing in the context of
wireguard. It does this by setting up a condition that will definately
evoke an icmp error message from the driver, but along a nat'd path.

Signed-off-by: Jason A. Donenfeld <Jason@zx2c4.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
4 years agosunvnet: use icmp_ndo_send helper
Jason A. Donenfeld [Tue, 11 Feb 2020 19:47:07 +0000 (20:47 +0100)]
sunvnet: use icmp_ndo_send helper

Because sunvnet is calling icmp from network device context, it should use
the ndo helper so that the rate limiting applies correctly. While we're
at it, doing the additional route lookup before calling icmp_ndo_send is
superfluous, since this is the job of the icmp code in the first place.

Signed-off-by: Jason A. Donenfeld <Jason@zx2c4.com>
Cc: Shannon Nelson <shannon.nelson@oracle.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
4 years agogtp: use icmp_ndo_send helper
Jason A. Donenfeld [Tue, 11 Feb 2020 19:47:06 +0000 (20:47 +0100)]
gtp: use icmp_ndo_send helper

Because gtp is calling icmp from network device context, it should use
the ndo helper so that the rate limiting applies correctly.

Signed-off-by: Jason A. Donenfeld <Jason@zx2c4.com>
Cc: Harald Welte <laforge@gnumonks.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
4 years agoicmp: introduce helper for nat'd source address in network device context
Jason A. Donenfeld [Tue, 11 Feb 2020 19:47:05 +0000 (20:47 +0100)]
icmp: introduce helper for nat'd source address in network device context

This introduces a helper function to be called only by network drivers
that wraps calls to icmp[v6]_send in a conntrack transformation, in case
NAT has been used. We don't want to pollute the non-driver path, though,
so we introduce this as a helper to be called by places that actually
make use of this, as suggested by Florian.

Signed-off-by: Jason A. Donenfeld <Jason@zx2c4.com>
Cc: Florian Westphal <fw@strlen.de>
Signed-off-by: David S. Miller <davem@davemloft.net>
4 years agoMerge branch 'linus' of git://git.kernel.org/pub/scm/linux/kernel/git/herbert/crypto-2.6
Linus Torvalds [Thu, 13 Feb 2020 22:17:39 +0000 (14:17 -0800)]
Merge branch 'linus' of git://git./linux/kernel/git/herbert/crypto-2.6

Pull crypto fix from Herbert Xu:
 "This fixes a Kconfig anomaly when lib/crypto is enabled without Crypto
  API"

* 'linus' of git://git.kernel.org/pub/scm/linux/kernel/git/herbert/crypto-2.6:
  crypto: Kconfig - allow tests to be disabled when manager is disabled

4 years agoMerge branch 'skip_sw-skip_hw-validation'
David S. Miller [Thu, 13 Feb 2020 22:16:35 +0000 (14:16 -0800)]
Merge branch 'skip_sw-skip_hw-validation'

Davide Caratti says:

====================
add missing validation of 'skip_hw/skip_sw'

ensure that all classifiers currently supporting HW offload
validate the 'flags' parameter provided by user:

- patch 1/2 fixes cls_matchall
- patch 2/2 fixes cls_flower
====================

Signed-off-by: David S. Miller <davem@davemloft.net>
4 years agonet/sched: flower: add missing validation of TCA_FLOWER_FLAGS
Davide Caratti [Tue, 11 Feb 2020 18:33:40 +0000 (19:33 +0100)]
net/sched: flower: add missing validation of TCA_FLOWER_FLAGS

unlike other classifiers that can be offloaded (i.e. users can set flags
like 'skip_hw' and 'skip_sw'), 'cls_flower' doesn't validate the size of
netlink attribute 'TCA_FLOWER_FLAGS' provided by user: add a proper entry
to fl_policy.

Fixes: 5b33f48842fa ("net/flower: Introduce hardware offload support")
Signed-off-by: Davide Caratti <dcaratti@redhat.com>
Acked-by: Jiri Pirko <jiri@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
4 years agonet/sched: matchall: add missing validation of TCA_MATCHALL_FLAGS
Davide Caratti [Tue, 11 Feb 2020 18:33:39 +0000 (19:33 +0100)]
net/sched: matchall: add missing validation of TCA_MATCHALL_FLAGS

unlike other classifiers that can be offloaded (i.e. users can set flags
like 'skip_hw' and 'skip_sw'), 'cls_matchall' doesn't validate the size
of netlink attribute 'TCA_MATCHALL_FLAGS' provided by user: add a proper
entry to mall_policy.

Fixes: b87f7936a932 ("net/sched: Add match-all classifier hw offloading.")
Signed-off-by: Davide Caratti <dcaratti@redhat.com>
Acked-by: Jiri Pirko <jiri@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
4 years agonet/flow_dissector: remove unexist field description
Hangbin Liu [Tue, 11 Feb 2020 10:31:54 +0000 (18:31 +0800)]
net/flow_dissector: remove unexist field description

@thoff has moved to struct flow_dissector_key_control.

Fixes: 42aecaa9bb2b ("net: Get skb hash over flow_keys structure")
Signed-off-by: Hangbin Liu <liuhangbin@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
4 years agopage_pool: refill page when alloc.count of pool is zero
Li RongQing [Tue, 11 Feb 2020 02:13:44 +0000 (10:13 +0800)]
page_pool: refill page when alloc.count of pool is zero

"do {} while" in page_pool_refill_alloc_cache will always
refill page once whether refill is true or false, and whether
alloc.count of pool is less than PP_ALLOC_CACHE_REFILL or not
this is wrong, and will cause overflow of pool->alloc.cache

the caller of __page_pool_get_cached should provide guarantee
that pool->alloc.cache is safe to access, so in_serving_softirq
should be removed as suggested by Jesper Dangaard Brouer in
https://patchwork.ozlabs.org/patch/1233713/

so fix this issue by calling page_pool_refill_alloc_cache()
only when pool->alloc.count is zero

Fixes: 44768decb7c0 ("page_pool: handle page recycle for NUMA_NO_NODE condition")
Signed-off-by: Li RongQing <lirongqing@baidu.com>
Suggested-by: Jesper Dangaard Brouer <brouer@redhat.com>
Acked-by: Jesper Dangaard Brouer <brouer@redhat.com>
Acked-by: Ilias Apalodimas <ilias.apalodimas@linaro.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
4 years agoMerge branch '100GbE' of git://git.kernel.org/pub/scm/linux/kernel/git/jkirsher/net...
David S. Miller [Thu, 13 Feb 2020 22:10:11 +0000 (14:10 -0800)]
Merge branch '100GbE' of git://git./linux/kernel/git/jkirsher/net-queue

Jeff Kirsher says:

====================
Intel Wired LAN Driver Updates 2020-02-12

This series contains fixes to only the ice driver.

Dave fixes logic flaws in the DCB rebuild function which is used after a
reset.  Also fixed a configuration issue when switching between firmware
and software LLDP mode where the number of TLV's configured was getting
out of sync with what lldpad thinks is configured.

Paul fixes how the driver displayed all the supported and advertised
link modes by basing it on the PHY capabilities, and in the process
cleaned up a lot of code.

Brett fixes duplicate receive tail bumps by comparing the value we are
writing to tail with the previously written tail value.  Also cleaned up
workarounds that are no longer needed with the latest NVM images.

Anirudh cleaned up unnecessary CONFIG_PCI_IOV wrappers.  Updated the
driver to use ice_pf_to_dev() instead of &pf->pdev->dev or
&vsi->back->pdev->dev.  Cleaned up the string format in print function
calls to remove newlines where applicable.

Akeem updates the link message logging to include "Full Duplex" and
"Negotiated", to help distinguish from "Requested" for FEC.

Bruce fixes and consolidates the logging of firmware/NVM information
during driver load, since the information is duplicate of what is
available via ethtool.  Fixed the checking of the Unit Load Status bits
after reset to ensure they are 0x7FF before continuing, by updating the
mask.  Cleanup up possible NULL dereferences that were created by a
previous commit.

Ben fixes the driver to use the correct netif_msg_tx/rx_error() to
determine whether to print the MDD event type.

Tony provides several trivial fixes, which include whitespace, typos,
function header comments, reverse Christmas tree issues.
====================

Signed-off-by: David S. Miller <davem@davemloft.net>
4 years agoNFSv4: Ensure the delegation cred is pinned when we call delegreturn
Trond Myklebust [Thu, 13 Feb 2020 19:51:07 +0000 (14:51 -0500)]
NFSv4: Ensure the delegation cred is pinned when we call delegreturn

Ensure we don't release the delegation cred during the call to
nfs4_proc_delegreturn().

Fixes: ee05f456772d ("NFSv4: Fix races between open and delegreturn")
Signed-off-by: Trond Myklebust <trond.myklebust@hammerspace.com>
Signed-off-by: Anna Schumaker <Anna.Schumaker@Netapp.com>
4 years agoNFSv4: Ensure the delegation is pinned in nfs_do_return_delegation()
Trond Myklebust [Thu, 13 Feb 2020 19:51:06 +0000 (14:51 -0500)]
NFSv4: Ensure the delegation is pinned in nfs_do_return_delegation()

The call to nfs_do_return_delegation() needs to be taken without
any RCU locks. Add a refcount to make sure the delegation remains
pinned in memory until we're done.

Fixes: ee05f456772d ("NFSv4: Fix races between open and delegreturn")
Signed-off-by: Trond Myklebust <trond.myklebust@hammerspace.com>
Signed-off-by: Anna Schumaker <Anna.Schumaker@Netapp.com>
4 years agoNFSv4.1 make cachethis=no for writes
Olga Kornievskaia [Wed, 12 Feb 2020 22:32:12 +0000 (17:32 -0500)]
NFSv4.1 make cachethis=no for writes

Turning caching off for writes on the server should improve performance.

Fixes: fba83f34119a ("NFS: Pass "privileged" value to nfs4_init_sequence()")
Signed-off-by: Olga Kornievskaia <kolga@netapp.com>
Reviewed-by: Trond Myklebust <trond.myklebust@hammerspace.com>
Signed-off-by: Anna Schumaker <Anna.Schumaker@Netapp.com>
4 years agoxprtrdma: Fix DMA scatter-gather list mapping imbalance
Chuck Lever [Wed, 12 Feb 2020 16:12:30 +0000 (11:12 -0500)]
xprtrdma: Fix DMA scatter-gather list mapping imbalance

The @nents value that was passed to ib_dma_map_sg() has to be passed
to the matching ib_dma_unmap_sg() call. If ib_dma_map_sg() choses to
concatenate sg entries, it will return a different nents value than
it was passed.

The bug was exposed by recent changes to the AMD IOMMU driver, which
enabled sg entry concatenation.

Looking all the way back to commit 4143f34e01e9 ("xprtrdma: Port to
new memory registration API") and reviewing other kernel ULPs, it's
not clear that the frwr_map() logic was ever correct for this case.

Reported-by: Andre Tomt <andre@tomt.net>
Suggested-by: Robin Murphy <robin.murphy@arm.com>
Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
Cc: stable@vger.kernel.org
Reviewed-by: Jason Gunthorpe <jgg@mellanox.com>
Signed-off-by: Anna Schumaker <Anna.Schumaker@Netapp.com>
4 years agoselftests: openat2: fix build error on newer glibc
Aleksa Sarai [Thu, 13 Feb 2020 07:26:56 +0000 (18:26 +1100)]
selftests: openat2: fix build error on newer glibc

It appears that newer glibcs check that openat(O_CREAT) was provided a
fourth argument (rather than passing garbage), resulting in the
following build error:

> In file included from /usr/include/fcntl.h:301,
>                  from helpers.c:9:
> In function 'openat',
>     inlined from 'touchat' at helpers.c:49:11:
> /usr/include/x86_64-linux-gnu/bits/fcntl2.h:126:4: error: call to
> '__openat_missing_mode' declared with attribute error: openat with O_CREAT
> or O_TMPFILE in third argument needs 4 arguments
>   126 |    __openat_missing_mode ();
>       |    ^~~~~~~~~~~~~~~~~~~~~~~~

Reported-by: Shuah Khan <shuah@kernel.org>
Signed-off-by: Aleksa Sarai <cyphar@cyphar.com>
Tested-by: Shuah Khan <skhan@linuxfoundation.org>
Signed-off-by: Shuah Khan <skhan@linuxfoundation.org>
4 years agoselftests: use LDLIBS for libraries instead of LDFLAGS
Dmitry Safonov [Wed, 12 Feb 2020 14:00:40 +0000 (14:00 +0000)]
selftests: use LDLIBS for libraries instead of LDFLAGS

While building selftests, the following errors were observed:
> tools/testing/selftests/timens'
> gcc -Wall -Werror -pthread  -lrt -ldl  timens.c  -o tools/testing/selftests/timens/timens
> /usr/bin/ld: /tmp/ccGy5CST.o: in function `check_config_posix_timers':
> timens.c:(.text+0x65a): undefined reference to `timer_create'
> collect2: error: ld returned 1 exit status

Quoting commit 870f193d48c2 ("selftests: net: use LDLIBS instead of
LDFLAGS"):

The default Makefile rule looks like:

$(CC) $(CFLAGS) $(LDFLAGS) $@ $^ $(LDLIBS)

When linking is done by gcc itself, no issue, but when it needs to be passed
to proper ld, only LDLIBS follows and then ld cannot know what libs to link
with.

More detail:
https://www.gnu.org/software/make/manual/html_node/Implicit-Variables.html

LDFLAGS
Extra flags to give to compilers when they are supposed to invoke the linker,
‘ld’, such as -L. Libraries (-lfoo) should be added to the LDLIBS variable
instead.

LDLIBS
Library flags or names given to compilers when they are supposed to invoke the
linker, ‘ld’. LOADLIBES is a deprecated (but still supported) alternative to
LDLIBS. Non-library linker flags, such as -L, should go in the LDFLAGS
variable.

While at here, correct other selftests, not only timens ones.

Reported-by: Shuah Khan <skhan@linuxfoundation.org>
Signed-off-by: Dmitry Safonov <dima@arista.com>
Tested-by: Shuah Khan <skhan@linuxfoundation.org>
Signed-off-by: Shuah Khan <skhan@linuxfoundation.org>
4 years agojbd2: do not clear the BH_Mapped flag when forgetting a metadata buffer
zhangyi (F) [Thu, 13 Feb 2020 06:38:21 +0000 (14:38 +0800)]
jbd2: do not clear the BH_Mapped flag when forgetting a metadata buffer

Commit 904cdbd41d74 ("jbd2: clear dirty flag when revoking a buffer from
an older transaction") set the BH_Freed flag when forgetting a metadata
buffer which belongs to the committing transaction, it indicate the
committing process clear dirty bits when it is done with the buffer. But
it also clear the BH_Mapped flag at the same time, which may trigger
below NULL pointer oops when block_size < PAGE_SIZE.

rmdir 1             kjournald2                 mkdir 2
                    jbd2_journal_commit_transaction
    commit transaction N
jbd2_journal_forget
set_buffer_freed(bh1)
                    jbd2_journal_commit_transaction
                     commit transaction N+1
                     ...
                     clear_buffer_mapped(bh1)
                                               ext4_getblk(bh2 ummapped)
                                               ...
                                               grow_dev_page
                                                init_page_buffers
                                                 bh1->b_private=NULL
                                                 bh2->b_private=NULL
                     jbd2_journal_put_journal_head(jh1)
                      __journal_remove_journal_head(hb1)
       jh1 is NULL and trigger oops

*) Dir entry block bh1 and bh2 belongs to one page, and the bh2 has
   already been unmapped.

For the metadata buffer we forgetting, we should always keep the mapped
flag and clear the dirty flags is enough, so this patch pick out the
these buffers and keep their BH_Mapped flag.

Link: https://lore.kernel.org/r/20200213063821.30455-3-yi.zhang@huawei.com
Fixes: 904cdbd41d74 ("jbd2: clear dirty flag when revoking a buffer from an older transaction")
Reviewed-by: Jan Kara <jack@suse.cz>
Signed-off-by: zhangyi (F) <yi.zhang@huawei.com>
Signed-off-by: Theodore Ts'o <tytso@mit.edu>
Cc: stable@kernel.org
4 years agojbd2: move the clearing of b_modified flag to the journal_unmap_buffer()
zhangyi (F) [Thu, 13 Feb 2020 06:38:20 +0000 (14:38 +0800)]
jbd2: move the clearing of b_modified flag to the journal_unmap_buffer()

There is no need to delay the clearing of b_modified flag to the
transaction committing time when unmapping the journalled buffer, so
just move it to the journal_unmap_buffer().

Link: https://lore.kernel.org/r/20200213063821.30455-2-yi.zhang@huawei.com
Reviewed-by: Jan Kara <jack@suse.cz>
Signed-off-by: zhangyi (F) <yi.zhang@huawei.com>
Signed-off-by: Theodore Ts'o <tytso@mit.edu>
Cc: stable@kernel.org
4 years agoext4: add cond_resched() to ext4_protect_reserved_inode
Shijie Luo [Tue, 11 Feb 2020 01:17:52 +0000 (20:17 -0500)]
ext4: add cond_resched() to ext4_protect_reserved_inode

When journal size is set too big by "mkfs.ext4 -J size=", or when
we mount a crafted image to make journal inode->i_size too big,
the loop, "while (i < num)", holds cpu too long. This could cause
soft lockup.

[  529.357541] Call trace:
[  529.357551]  dump_backtrace+0x0/0x198
[  529.357555]  show_stack+0x24/0x30
[  529.357562]  dump_stack+0xa4/0xcc
[  529.357568]  watchdog_timer_fn+0x300/0x3e8
[  529.357574]  __hrtimer_run_queues+0x114/0x358
[  529.357576]  hrtimer_interrupt+0x104/0x2d8
[  529.357580]  arch_timer_handler_virt+0x38/0x58
[  529.357584]  handle_percpu_devid_irq+0x90/0x248
[  529.357588]  generic_handle_irq+0x34/0x50
[  529.357590]  __handle_domain_irq+0x68/0xc0
[  529.357593]  gic_handle_irq+0x6c/0x150
[  529.357595]  el1_irq+0xb8/0x140
[  529.357599]  __ll_sc_atomic_add_return_acquire+0x14/0x20
[  529.357668]  ext4_map_blocks+0x64/0x5c0 [ext4]
[  529.357693]  ext4_setup_system_zone+0x330/0x458 [ext4]
[  529.357717]  ext4_fill_super+0x2170/0x2ba8 [ext4]
[  529.357722]  mount_bdev+0x1a8/0x1e8
[  529.357746]  ext4_mount+0x44/0x58 [ext4]
[  529.357748]  mount_fs+0x50/0x170
[  529.357752]  vfs_kern_mount.part.9+0x54/0x188
[  529.357755]  do_mount+0x5ac/0xd78
[  529.357758]  ksys_mount+0x9c/0x118
[  529.357760]  __arm64_sys_mount+0x28/0x38
[  529.357764]  el0_svc_common+0x78/0x130
[  529.357766]  el0_svc_handler+0x38/0x78
[  529.357769]  el0_svc+0x8/0xc
[  541.356516] watchdog: BUG: soft lockup - CPU#0 stuck for 23s! [mount:18674]

Link: https://lore.kernel.org/r/20200211011752.29242-1-luoshijie1@huawei.com
Reviewed-by: Jan Kara <jack@suse.cz>
Signed-off-by: Shijie Luo <luoshijie1@huawei.com>
Signed-off-by: Theodore Ts'o <tytso@mit.edu>
Cc: stable@kernel.org
4 years agoext4: fix checksum errors with indexed dirs
Jan Kara [Mon, 10 Feb 2020 14:43:16 +0000 (15:43 +0100)]
ext4: fix checksum errors with indexed dirs

DIR_INDEX has been introduced as a compat ext4 feature. That means that
even kernels / tools that don't understand the feature may modify the
filesystem. This works because for kernels not understanding indexed dir
format, internal htree nodes appear just as empty directory entries.
Index dir aware kernels then check the htree structure is still
consistent before using the data. This all worked reasonably well until
metadata checksums were introduced. The problem is that these
effectively made DIR_INDEX only ro-compatible because internal htree
nodes store checksums in a different place than normal directory blocks.
Thus any modification ignorant to DIR_INDEX (or just clearing
EXT4_INDEX_FL from the inode) will effectively cause checksum mismatch
and trigger kernel errors. So we have to be more careful when dealing
with indexed directories on filesystems with checksumming enabled.

1) We just disallow loading any directory inodes with EXT4_INDEX_FL when
DIR_INDEX is not enabled. This is harsh but it should be very rare (it
means someone disabled DIR_INDEX on existing filesystem and didn't run
e2fsck), e2fsck can fix the problem, and we don't want to answer the
difficult question: "Should we rather corrupt the directory more or
should we ignore that DIR_INDEX feature is not set?"

2) When we find out htree structure is corrupted (but the filesystem and
the directory should in support htrees), we continue just ignoring htree
information for reading but we refuse to add new entries to the
directory to avoid corrupting it more.

Link: https://lore.kernel.org/r/20200210144316.22081-1-jack@suse.cz
Fixes: dbe89444042a ("ext4: Calculate and verify checksums for htree nodes")
Reviewed-by: Andreas Dilger <adilger@dilger.ca>
Signed-off-by: Jan Kara <jack@suse.cz>
Signed-off-by: Theodore Ts'o <tytso@mit.edu>
Cc: stable@kernel.org
4 years agoext4: fix support for inode sizes > 1024 bytes
Theodore Ts'o [Thu, 6 Feb 2020 22:35:01 +0000 (17:35 -0500)]
ext4: fix support for inode sizes > 1024 bytes

A recent commit, 9803387c55f7 ("ext4: validate the
debug_want_extra_isize mount option at parse time"), moved mount-time
checks around.  One of those changes moved the inode size check before
the blocksize variable was set to the blocksize of the file system.
After 9803387c55f7 was set to the minimum allowable blocksize, which
in practice on most systems would be 1024 bytes.  This cuased file
systems with inode sizes larger than 1024 bytes to be rejected with a
message:

EXT4-fs (sdXX): unsupported inode size: 4096

Fixes: 9803387c55f7 ("ext4: validate the debug_want_extra_isize mount option at parse time")
Link: https://lore.kernel.org/r/20200206225252.GA3673@mit.edu
Reported-by: Herbert Poetzl <herbert@13thfloor.at>
Signed-off-by: Theodore Ts'o <tytso@mit.edu>
Cc: stable@kernel.org
4 years agocrypto/testmgr: enable selftests for paes-s390 ciphers
Harald Freudenberger [Wed, 22 Jan 2020 13:43:23 +0000 (14:43 +0100)]
crypto/testmgr: enable selftests for paes-s390 ciphers

This patch enables the selftests for the s390 specific protected key
AES (PAES) cipher implementations:
  * cbc-paes-s390
  * ctr-paes-s390
  * ecb-paes-s390
  * xts-paes-s390
PAES is an AES cipher but with encrypted ('protected') key
material. However, the paes ciphers are able to derive an protected
key from clear key material with the help of the pkey kernel module.

So this patch now enables the generic AES tests for the paes
ciphers. Under the hood the setkey() functions rearrange the clear key
values as clear key token and so the pkey kernel module is able to
provide protected key blobs from the given clear key values. The
derived protected key blobs are then used within the paes cipers and
should produce the very same results as the generic AES implementation
with the clear key values.

The s390-paes cipher testlist entries are surrounded
by #if IS_ENABLED(CONFIG_CRYPTO_PAES_S390) because they don't
make any sense on non s390 platforms or without the PAES
cipher implementation.

Link: http://lkml.kernel.org/r/20200213083946.zicarnnt3wizl5ty@gondor.apana.org.au
Acked-by: Herbert Xu <herbert@gondor.apana.org.au>
Signed-off-by: Harald Freudenberger <freude@linux.ibm.com>
Signed-off-by: Vasily Gorbik <gor@linux.ibm.com>
4 years agoext4: simplify checking quota limits in ext4_statfs()
Jan Kara [Thu, 30 Jan 2020 11:11:48 +0000 (12:11 +0100)]
ext4: simplify checking quota limits in ext4_statfs()

Coverity reports that conditions checking quota limits in ext4_statfs()
contain dead code. Indeed it is right and current conditions can be
simplified.

Link: https://lore.kernel.org/r/20200130111148.10766-1-jack@suse.cz
Reported-by: Coverity <scan-admin@coverity.com>
Signed-off-by: Jan Kara <jack@suse.cz>
Signed-off-by: Theodore Ts'o <tytso@mit.edu>
Cc: stable@kernel.org
4 years agoext4: don't assume that mmp_nodename/bdevname have NUL
Andreas Dilger [Sun, 26 Jan 2020 22:03:34 +0000 (15:03 -0700)]
ext4: don't assume that mmp_nodename/bdevname have NUL

Don't assume that the mmp_nodename and mmp_bdevname strings are NUL
terminated, since they are filled in by snprintf(), which is not
guaranteed to do so.

Link: https://lore.kernel.org/r/1580076215-1048-1-git-send-email-adilger@dilger.ca
Signed-off-by: Andreas Dilger <adilger@dilger.ca>
Signed-off-by: Theodore Ts'o <tytso@mit.edu>
Cc: stable@kernel.org
4 years agoRDMA/core: Fix protection fault in get_pkey_idx_qp_list
Leon Romanovsky [Wed, 12 Feb 2020 08:06:51 +0000 (10:06 +0200)]
RDMA/core: Fix protection fault in get_pkey_idx_qp_list

We don't need to set pkey as valid in case that user set only one of pkey
index or port number, otherwise it will be resulted in NULL pointer
dereference while accessing to uninitialized pkey list.  The following
crash from Syzkaller revealed it.

  kasan: CONFIG_KASAN_INLINE enabled
  kasan: GPF could be caused by NULL-ptr deref or user memory access
  general protection fault: 0000 [#1] SMP KASAN PTI
  CPU: 1 PID: 14753 Comm: syz-executor.2 Not tainted 5.5.0-rc5 #2
  Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS
  rel-1.12.1-0-ga5cab58e9a3f-prebuilt.qemu.org 04/01/2014
  RIP: 0010:get_pkey_idx_qp_list+0x161/0x2d0
  Code: 01 00 00 49 8b 5e 20 4c 39 e3 0f 84 b9 00 00 00 e8 e4 42 6e fe 48
  8d 7b 10 48 b8 00 00 00 00 00 fc ff df 48 89 fa 48 c1 ea 03 <0f> b6 04
  02 84 c0 74 08 3c 01 0f 8e d0 00 00 00 48 8d 7d 04 48 b8
  RSP: 0018:ffffc9000bc6f950 EFLAGS: 00010202
  RAX: dffffc0000000000 RBX: 0000000000000000 RCX: ffffffff82c8bdec
  RDX: 0000000000000002 RSI: ffffc900030a8000 RDI: 0000000000000010
  RBP: ffff888112c8ce80 R08: 0000000000000004 R09: fffff5200178df1f
  R10: 0000000000000001 R11: fffff5200178df1f R12: ffff888115dc4430
  R13: ffff888115da8498 R14: ffff888115dc4410 R15: ffff888115da8000
  FS:  00007f20777de700(0000) GS:ffff88811b100000(0000)
  knlGS:0000000000000000
  CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
  CR2: 0000001b2f721000 CR3: 00000001173ca002 CR4: 0000000000360ee0
  DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
  DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
  Call Trace:
   port_pkey_list_insert+0xd7/0x7c0
   ib_security_modify_qp+0x6fa/0xfc0
   _ib_modify_qp+0x8c4/0xbf0
   modify_qp+0x10da/0x16d0
   ib_uverbs_modify_qp+0x9a/0x100
   ib_uverbs_write+0xaa5/0xdf0
   __vfs_write+0x7c/0x100
   vfs_write+0x168/0x4a0
   ksys_write+0xc8/0x200
   do_syscall_64+0x9c/0x390
   entry_SYSCALL_64_after_hwframe+0x44/0xa9

Fixes: d291f1a65232 ("IB/core: Enforce PKey security on QPs")
Link: https://lore.kernel.org/r/20200212080651.GB679970@unreal
Signed-off-by: Maor Gottlieb <maorg@mellanox.com>
Signed-off-by: Leon Romanovsky <leonro@mellanox.com>
Message-Id: <20200212080651.GB679970@unreal>

4 years agobcache: remove macro nr_to_fifo_front()
Coly Li [Thu, 13 Feb 2020 14:12:07 +0000 (22:12 +0800)]
bcache: remove macro nr_to_fifo_front()

Macro nr_to_fifo_front() is only used once in btree_flush_write(),
it is unncessary indeed. This patch removes this macro and does
calculation directly in place.

Signed-off-by: Coly Li <colyli@suse.de>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
4 years agobcache: Revert "bcache: shrink btree node cache after bch_btree_check()"
Coly Li [Thu, 13 Feb 2020 14:12:06 +0000 (22:12 +0800)]
bcache: Revert "bcache: shrink btree node cache after bch_btree_check()"

This reverts commit 1df3877ff6a4810054237c3259d900ded4468969.

In my testing, sometimes even all the cached btree nodes are freed,
creating gc and allocator kernel threads may still fail. Finally it
turns out that kthread_run() may fail if there is pending signal for
current task. And the pending signal is sent from OOM killer which
is triggered by memory consuption in bch_btree_check().

Therefore explicitly shrinking bcache btree node here does not help,
and after the shrinker callback is improved, as well as pending signals
are ignored before creating kernel threads, now such operation is
unncessary anymore.

This patch reverts the commit 1df3877ff6a4 ("bcache: shrink btree node
cache after bch_btree_check()") because we have better improvement now.

Signed-off-by: Coly Li <colyli@suse.de>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
4 years agobcache: ignore pending signals when creating gc and allocator thread
Coly Li [Thu, 13 Feb 2020 14:12:05 +0000 (22:12 +0800)]
bcache: ignore pending signals when creating gc and allocator thread

When run a cache set, all the bcache btree node of this cache set will
be checked by bch_btree_check(). If the bcache btree is very large,
iterating all the btree nodes will occupy too much system memory and
the bcache registering process might be selected and killed by system
OOM killer. kthread_run() will fail if current process has pending
signal, therefore the kthread creating in run_cache_set() for gc and
allocator kernel threads are very probably failed for a very large
bcache btree.

Indeed such OOM is safe and the registering process will exit after
the registration done. Therefore this patch flushes pending signals
during the cache set start up, specificly in bch_cache_allocator_start()
and bch_gc_thread_start(), to make sure run_cache_set() won't fail for
large cahced data set.

Signed-off-by: Coly Li <colyli@suse.de>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
4 years agoALSA: pcm: Fix double hw_free calls
Takashi Iwai [Thu, 13 Feb 2020 06:03:49 +0000 (07:03 +0100)]
ALSA: pcm: Fix double hw_free calls

The commit 66f2d19f8116 ("ALSA: pcm: Fix memory leak at closing a
stream without hw_free") tried to fix the regression wrt the missing
hw_free call at closing without SNDRV_PCM_IOCTL_HW_FREE ioctl.
However, the code change dropped mistakenly the state check, resulting
in calling hw_free twice when SNDRV_PCM_IOCTL_HW_FRE got called
beforehand.  For most drivers, this is almost harmless, but the
drivers like SOF show another regression now.

This patch adds the state condition check before calling do_hw_free()
at releasing the stream for avoiding the double hw_free calls.

Fixes: 66f2d19f8116 ("ALSA: pcm: Fix memory leak at closing a stream without hw_free")
Reported-by: Bard Liao <yung-chuan.liao@linux.intel.com>
Reported-by: Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com>
Tested-by: Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com>
Cc: <stable@vger.kernel.org>
Link: https://lore.kernel.org/r/s5hd0ajyprg.wl-tiwai@suse.de
Signed-off-by: Takashi Iwai <tiwai@suse.de>
4 years agoRDMA/rxe: Fix soft lockup problem due to using tasklets in softirq
Zhu Yanjun [Wed, 12 Feb 2020 07:26:33 +0000 (09:26 +0200)]
RDMA/rxe: Fix soft lockup problem due to using tasklets in softirq

When run stress tests with RXE, the following Call Traces often occur

  watchdog: BUG: soft lockup - CPU#2 stuck for 22s! [swapper/2:0]
  ...
  Call Trace:
  <IRQ>
  create_object+0x3f/0x3b0
  kmem_cache_alloc_node_trace+0x129/0x2d0
  __kmalloc_reserve.isra.52+0x2e/0x80
  __alloc_skb+0x83/0x270
  rxe_init_packet+0x99/0x150 [rdma_rxe]
  rxe_requester+0x34e/0x11a0 [rdma_rxe]
  rxe_do_task+0x85/0xf0 [rdma_rxe]
  tasklet_action_common.isra.21+0xeb/0x100
  __do_softirq+0xd0/0x298
  irq_exit+0xc5/0xd0
  smp_apic_timer_interrupt+0x68/0x120
  apic_timer_interrupt+0xf/0x20
  </IRQ>
  ...

The root cause is that tasklet is actually a softirq. In a tasklet
handler, another softirq handler is triggered. Usually these softirq
handlers run on the same cpu core. So this will cause "soft lockup Bug".

Fixes: 8700e3e7c485 ("Soft RoCE driver")
Link: https://lore.kernel.org/r/20200212072635.682689-8-leon@kernel.org
Signed-off-by: Zhu Yanjun <yanjunz@mellanox.com>
Signed-off-by: Leon Romanovsky <leonro@mellanox.com>
Signed-off-by: Jason Gunthorpe <jgg@mellanox.com>
4 years agoRDMA/mlx5: Prevent overflow in mmap offset calculations
Leon Romanovsky [Wed, 12 Feb 2020 07:26:35 +0000 (09:26 +0200)]
RDMA/mlx5: Prevent overflow in mmap offset calculations

The cmd and index variables declared as u16 and the result is supposed to
be stored in u64. The C arithmetic rules doesn't promote "(index >> 8) <<
16" to be u64 and leaves the end result to be u16.

Fixes: 7be76bef320b ("IB/mlx5: Introduce VAR object and its alloc/destroy methods")
Link: https://lore.kernel.org/r/20200212072635.682689-10-leon@kernel.org
Signed-off-by: Leon Romanovsky <leonro@mellanox.com>
Reviewed-by: Jason Gunthorpe <jgg@mellanox.com>
Signed-off-by: Jason Gunthorpe <jgg@mellanox.com>
4 years agoIB/umad: Fix kernel crash while unloading ib_umad
Yonatan Cohen [Wed, 12 Feb 2020 07:26:34 +0000 (09:26 +0200)]
IB/umad: Fix kernel crash while unloading ib_umad

When disassociating a device from umad we must ensure that the sysfs
access is prevented before blocking the fops, otherwise assumptions in
syfs don't hold:

    CPU0                     CPU1
 ib_umad_kill_port()        ibdev_show()
    port->ib_dev = NULL
                                      dev_name(port->ib_dev)

The prior patch made an error in moving the device_destroy(), it should
have been split into device_del() (above) and put_device() (below). At
this point we already have the split, so move the device_del() back to its
original place.

  kernel stack
  PF: error_code(0x0000) - not-present page
  Oops: 0000 [#1] SMP DEBUG_PAGEALLOC PTI
  RIP: 0010:ibdev_show+0x18/0x50 [ib_umad]
  RSP: 0018:ffffc9000097fe40 EFLAGS: 00010282
  RAX: 0000000000000000 RBX: ffffffffa0441120 RCX: ffff8881df514000
  RDX: ffff8881df514000 RSI: ffffffffa0441120 RDI: ffff8881df1e8870
  RBP: ffffffff81caf000 R08: ffff8881df1e8870 R09: 0000000000000000
  R10: 0000000000001000 R11: 0000000000000003 R12: ffff88822f550b40
  R13: 0000000000000001 R14: ffffc9000097ff08 R15: ffff8882238bad58
  FS:  00007f1437ff3740(0000) GS:ffff888236940000(0000) knlGS:0000000000000000
  CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
  CR2: 00000000000004e8 CR3: 00000001e0dfc001 CR4: 00000000001606e0
  Call Trace:
   dev_attr_show+0x15/0x50
   sysfs_kf_seq_show+0xb8/0x1a0
   seq_read+0x12d/0x350
   vfs_read+0x89/0x140
   ksys_read+0x55/0xd0
   do_syscall_64+0x55/0x1b0
   entry_SYSCALL_64_after_hwframe+0x44/0xa9:

Fixes: cf7ad3030271 ("IB/umad: Avoid destroying device while it is accessed")
Link: https://lore.kernel.org/r/20200212072635.682689-9-leon@kernel.org
Signed-off-by: Yonatan Cohen <yonatanc@mellanox.com>
Signed-off-by: Leon Romanovsky <leonro@mellanox.com>
Reviewed-by: Jason Gunthorpe <jgg@mellanox.com>
Signed-off-by: Jason Gunthorpe <jgg@mellanox.com>
4 years agoRDMA/mlx5: Fix async events cleanup flows
Yishai Hadas [Wed, 12 Feb 2020 07:26:32 +0000 (09:26 +0200)]
RDMA/mlx5: Fix async events cleanup flows

As in the prior patch, the devx code is not fully cleaning up its
event_lists before finishing driver_destroy allowing a later read to
trigger user after free conditions.

Re-arrange things so that the event_list is always empty after destroy and
ensure it remains empty until the file is closed.

Fixes: f7c8416ccea5 ("RDMA/core: Simplify destruction of FD uobjects")
Link: https://lore.kernel.org/r/20200212072635.682689-7-leon@kernel.org
Signed-off-by: Yishai Hadas <yishaih@mellanox.com>
Signed-off-by: Leon Romanovsky <leonro@mellanox.com>
Reviewed-by: Jason Gunthorpe <jgg@mellanox.com>
Signed-off-by: Jason Gunthorpe <jgg@mellanox.com>
4 years agoRDMA/core: Add missing list deletion on freeing event queue
Michael Guralnik [Wed, 12 Feb 2020 07:26:31 +0000 (09:26 +0200)]
RDMA/core: Add missing list deletion on freeing event queue

When the uobject file scheme was revised to allow device disassociation
from the file it became possible for read() to still happen the driver
destroys the uobject.

The old clode code was not tolerant to concurrent read, and when it was
moved to the driver destroy it creates a bug.

Ensure the event_list is empty after driver destroy by adding the missing
list_del(). Otherwise read() can trigger a use after free and double
kfree.

Fixes: f7c8416ccea5 ("RDMA/core: Simplify destruction of FD uobjects")
Link: https://lore.kernel.org/r/20200212072635.682689-6-leon@kernel.org
Signed-off-by: Michael Guralnik <michaelgur@mellanox.com>
Reviewed-by: Yishai Hadas <yishaih@mellanox.com>
Signed-off-by: Leon Romanovsky <leonro@mellanox.com>
Reviewed-by: Jason Gunthorpe <jgg@mellanox.com>
Signed-off-by: Jason Gunthorpe <jgg@mellanox.com>
4 years agoASoC: codec2codec: avoid invalid/double-free of pcm runtime
Samuel Holland [Thu, 13 Feb 2020 06:11:44 +0000 (00:11 -0600)]
ASoC: codec2codec: avoid invalid/double-free of pcm runtime

The PCM runtime was freed during PMU in the case that the event hook
encountered an error. However, it is also unconditionally freed during
PMD. Avoid a double-free by dropping the call to kfree in the PMU hook.

Fixes: a72706ed8208 ("ASoC: codec2codec: remove ephemeral variables")
Cc: stable@vger.kernel.org
Signed-off-by: Samuel Holland <samuel@sholland.org>
Link: https://lore.kernel.org/r/20200213061147.29386-2-samuel@sholland.org
Signed-off-by: Mark Brown <broonie@kernel.org>
4 years agoEDAC/sysfs: Remove csrow objects on errors
Robert Richter [Wed, 12 Feb 2020 12:03:39 +0000 (13:03 +0100)]
EDAC/sysfs: Remove csrow objects on errors

All created csrow objects must be removed in the error path of
edac_create_csrow_objects(). The objects have been added as devices.

They need to be removed by doing a device_del() *and* put_device() call
to also free their memory. The missing put_device() leaves a memory
leak. Use device_unregister() instead of device_del() which properly
unregisters the device doing both.

Fixes: 7adc05d2dc3a ("EDAC/sysfs: Drop device references properly")
Signed-off-by: Robert Richter <rrichter@marvell.com>
Signed-off-by: Borislav Petkov <bp@suse.de>
Tested-by: John Garry <john.garry@huawei.com>
Cc: <stable@vger.kernel.org>
Link: https://lkml.kernel.org/r/20200212120340.4764-4-rrichter@marvell.com
4 years agoEDAC/mc: Fix use-after-free and memleaks during device removal
Robert Richter [Wed, 12 Feb 2020 17:25:18 +0000 (18:25 +0100)]
EDAC/mc: Fix use-after-free and memleaks during device removal

A test kernel with the options DEBUG_TEST_DRIVER_REMOVE, KASAN and
DEBUG_KMEMLEAK set, revealed several issues when removing an mci device:

1) Use-after-free:

On 27.11.19 17:07:33, John Garry wrote:
> [   22.104498] BUG: KASAN: use-after-free in
> edac_remove_sysfs_mci_device+0x148/0x180

The use-after-free is caused by the mci_for_each_dimm() macro called in
edac_remove_sysfs_mci_device(). The iterator was introduced with

  c498afaf7df8 ("EDAC: Introduce an mci_for_each_dimm() iterator").

The iterator loop calls device_unregister(&dimm->dev), which removes
the sysfs entry of the device, but also frees the dimm struct in
dimm_attr_release(). When incrementing the loop in mci_for_each_dimm(),
the dimm struct is accessed again, after having been freed already.

The fix is to free all the mci device's subsequent dimm and csrow
objects at a later point, in _edac_mc_free(), when the mci device itself
is being freed.

This keeps the data structures intact and the mci device can be
fully used until its removal. The change allows the safe usage of
mci_for_each_dimm() to release dimm devices from sysfs.

2) Memory leaks:

Following memory leaks have been detected:

 # grep edac /sys/kernel/debug/kmemleak | sort | uniq -c
       1     [<000000003c0f58f9>] edac_mc_alloc+0x3bc/0x9d0      # mci->csrows
      16     [<00000000bb932dc0>] edac_mc_alloc+0x49c/0x9d0      # csr->channels
      16     [<00000000e2734dba>] edac_mc_alloc+0x518/0x9d0      # csr->channels[chn]
       1     [<00000000eb040168>] edac_mc_alloc+0x5c8/0x9d0      # mci->dimms
      34     [<00000000ef737c29>] ghes_edac_register+0x1c8/0x3f8 # see edac_mc_alloc()

All leaks are from memory allocated by edac_mc_alloc().

Note: The test above shows that edac_mc_alloc() was called here from
ghes_edac_register(), thus both functions show up in the stack trace
but the module causing the leaks is edac_mc. The comments with the data
structures involved were made manually by analyzing the objdump.

The data structures listed above and created by edac_mc_alloc() are
not properly removed during device removal, which is done in
edac_mc_free().

There are two paths implemented to remove the device depending on device
registration, _edac_mc_free() is called if the device is not registered
and edac_unregister_sysfs() otherwise.

The implemenations differ. For the sysfs case, the mci device removal
lacks the removal of subsequent data structures (csrows, channels,
dimms). This causes the memory leaks (see mci_attr_release()).

 [ bp: Massage commit message. ]

Fixes: c498afaf7df8 ("EDAC: Introduce an mci_for_each_dimm() iterator")
Fixes: faa2ad09c01c ("edac_mc: edac_mc_free() cannot assume mem_ctl_info is registered in sysfs.")
Fixes: 7a623c039075 ("edac: rewrite the sysfs code to use struct device")
Reported-by: John Garry <john.garry@huawei.com>
Signed-off-by: Robert Richter <rrichter@marvell.com>
Signed-off-by: Borislav Petkov <bp@suse.de>
Tested-by: John Garry <john.garry@huawei.com>
Cc: <stable@vger.kernel.org>
Link: https://lkml.kernel.org/r/20200212120340.4764-3-rrichter@marvell.com
4 years agoALSA: usb-audio: Add clock validity quirk for Denon MC7000/MCX8000
Alexander Tsoy [Wed, 12 Feb 2020 23:54:50 +0000 (02:54 +0300)]
ALSA: usb-audio: Add clock validity quirk for Denon MC7000/MCX8000

It should be safe to ignore clock validity check result if the following
conditions are met:
 - only one single sample rate is supported;
 - the terminal is directly connected to the clock source;
 - the clock type is internal.

This is to deal with some Denon DJ controllers that always reports that
clock is invalid.

Tested-by: Tobias Oszlanyi <toszlanyi@yahoo.de>
Signed-off-by: Alexander Tsoy <alexander@tsoy.me>
Cc: <stable@vger.kernel.org>
Link: https://lore.kernel.org/r/20200212235450.697348-1-alexander@tsoy.me
Signed-off-by: Takashi Iwai <tiwai@suse.de>
4 years agocifs: Fix mode output in debugging statements
Frank Sorenson [Wed, 12 Feb 2020 21:31:48 +0000 (15:31 -0600)]
cifs: Fix mode output in debugging statements

A number of the debug statements output file or directory mode
in hex.  Change these to print using octal.

Signed-off-by: Frank Sorenson <sorenson@redhat.com>
Signed-off-by: Steve French <stfrench@microsoft.com>
4 years agoio-wq: don't call kXalloc_node() with non-online node
Jens Axboe [Tue, 11 Feb 2020 13:30:06 +0000 (06:30 -0700)]
io-wq: don't call kXalloc_node() with non-online node

Glauber reports a crash on init on a box he has:

 RIP: 0010:__alloc_pages_nodemask+0x132/0x340
 Code: 18 01 75 04 41 80 ce 80 89 e8 48 8b 54 24 08 8b 74 24 1c c1 e8 0c 48 8b 3c 24 83 e0 01 88 44 24 20 48 85 d2 0f 85 74 01 00 00 <3b> 77 08 0f 82 6b 01 00 00 48 89 7c 24 10 89 ea 48 8b 07 b9 00 02
 RSP: 0018:ffffb8be4d0b7c28 EFLAGS: 00010246
 RAX: 0000000000000000 RBX: 0000000000000000 RCX: 000000000000e8e8
 RDX: 0000000000000000 RSI: 0000000000000002 RDI: 0000000000002080
 RBP: 0000000000012cc0 R08: 0000000000000000 R09: 0000000000000002
 R10: 0000000000000dc0 R11: ffff995c60400100 R12: 0000000000000000
 R13: 0000000000012cc0 R14: 0000000000000001 R15: ffff995c60db00f0
 FS:  00007f4d115ca900(0000) GS:ffff995c60d80000(0000) knlGS:0000000000000000
 CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
 CR2: 0000000000002088 CR3: 00000017cca66002 CR4: 00000000007606e0
 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
 PKRU: 55555554
 Call Trace:
  alloc_slab_page+0x46/0x320
  new_slab+0x9d/0x4e0
  ___slab_alloc+0x507/0x6a0
  ? io_wq_create+0xb4/0x2a0
  __slab_alloc+0x1c/0x30
  kmem_cache_alloc_node_trace+0xa6/0x260
  io_wq_create+0xb4/0x2a0
  io_uring_setup+0x97f/0xaa0
  ? io_remove_personalities+0x30/0x30
  ? io_poll_trigger_evfd+0x30/0x30
  do_syscall_64+0x5b/0x1c0
  entry_SYSCALL_64_after_hwframe+0x44/0xa9
 RIP: 0033:0x7f4d116cb1ed

which is due to the 'wqe' and 'worker' allocation being node affine.
But it isn't valid to call the node affine allocation if the node isn't
online.

Setup structures for even offline nodes, as usual, but skip them in
terms of thread setup to not waste resources. If the node isn't online,
just alloc memory with NUMA_NO_NODE.

Reported-by: Glauber Costa <glauber@scylladb.com>
Tested-by: Glauber Costa <glauber@scylladb.com>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
4 years agohwmon: (pmbus/xdpe12284) fix typo in compatible strings
Johan Hovold [Wed, 12 Feb 2020 09:24:26 +0000 (10:24 +0100)]
hwmon: (pmbus/xdpe12284) fix typo in compatible strings

Make sure that the driver compatible strings matches the binding by
removing the space between the manufacturer and model.

Fixes: aaafb7c8eb1c ("hwmon: (pmbus) Add support for Infineon Multi-phase xdpe122 family controllers")
Cc: Vadim Pasternak <vadimp@mellanox.com>
Signed-off-by: Johan Hovold <johan@kernel.org>
Link: https://lore.kernel.org/r/20200212092426.24012-1-johan@kernel.org
Signed-off-by: Guenter Roeck <linux@roeck-us.net>
4 years agolinux/pipe_fs_i.h: fix kernel-doc warnings after @wait was split
Randy Dunlap [Mon, 10 Feb 2020 03:36:14 +0000 (19:36 -0800)]
linux/pipe_fs_i.h: fix kernel-doc warnings after @wait was split

Fix kernel-doc warnings in struct pipe_inode_info after @wait was
split into @rd_wait and @wr_wait.

  include/linux/pipe_fs_i.h:66: warning: Function parameter or member 'rd_wait' not described in 'pipe_inode_info'
  include/linux/pipe_fs_i.h:66: warning: Function parameter or member 'wr_wait' not described in 'pipe_inode_info'

Fixes: 0ddad21d3e99 ("pipe: use exclusive waits when reading or writing")
Signed-off-by: Randy Dunlap <rdunlap@infradead.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
4 years agoice: Trivial fixes
Tony Nguyen [Thu, 6 Feb 2020 09:20:13 +0000 (01:20 -0800)]
ice: Trivial fixes

This is a collection of trivial fixes including fixing whitespace, typos,
function headers, reverse Christmas tree, etc.

Signed-off-by: Tony Nguyen <anthony.l.nguyen@intel.com>
Tested-by: Andrew Bowers <andrewx.bowers@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
4 years agoice: Use correct netif error function
Ben Shelton [Thu, 6 Feb 2020 09:20:12 +0000 (01:20 -0800)]
ice: Use correct netif error function

Use the correct netif_msg_[tx,rx]_error() function to determine whether to
print the MDD event type.

Signed-off-by: Ben Shelton <benjamin.h.shelton@intel.com>
Signed-off-by: Tony Nguyen <anthony.l.nguyen@intel.com>
Tested-by: Andrew Bowers <andrewx.bowers@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
4 years agoice: Cleanup ice_vsi_alloc_q_vectors
Anirudh Venkataramanan [Thu, 6 Feb 2020 09:20:11 +0000 (01:20 -0800)]
ice: Cleanup ice_vsi_alloc_q_vectors

1. Remove local variable num_q_vectors and use vsi->num_q_vectors instead
2. Remove local variable pf and pass vsi->back to ice_pf_to_dev

Signed-off-by: Anirudh Venkataramanan <anirudh.venkataramanan@intel.com>
Tested-by: Andrew Bowers <andrewx.bowers@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
4 years agoice: Make print statements more compact
Anirudh Venkataramanan [Thu, 6 Feb 2020 09:20:10 +0000 (01:20 -0800)]
ice: Make print statements more compact

Formatting strings in print function calls (like dev_info, dev_err, etc.)
can exceed 80 columns without making checkpatch unhappy. So remove
newlines where applicable and make print statements more compact.

Signed-off-by: Anirudh Venkataramanan <anirudh.venkataramanan@intel.com>
Signed-off-by: Tony Nguyen <anthony.l.nguyen@intel.com>
Tested-by: Andrew Bowers <andrewx.bowers@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
4 years agoice: Use ice_pf_to_dev
Anirudh Venkataramanan [Thu, 6 Feb 2020 09:20:09 +0000 (01:20 -0800)]
ice: Use ice_pf_to_dev

Use ice_pf_to_dev(pf) instead of &pf->pdev->dev
Use ice_pf_to_dev(vsi->back) instead of &vsi->back->pdev->dev
When a pointer to the pf instance is available, use ice_pf_to_dev
instead of ice_hw_to_dev

Signed-off-by: Anirudh Venkataramanan <anirudh.venkataramanan@intel.com>
Tested-by: Andrew Bowers <andrewx.bowers@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
4 years agoice: Remove possible null dereference
Tony Nguyen [Thu, 6 Feb 2020 09:20:08 +0000 (01:20 -0800)]
ice: Remove possible null dereference

Commit 1f45ebe0d8fb ("ice: add extra check for null Rx descriptor") moved
the call to ice_construct_skb() under a null check as Coverity reported a
possible use of null skb. However, the original call was not deleted, do so
now.

Fixes: 1f45ebe0d8fb ("ice: add extra check for null Rx descriptor")
Reported-by: Bruce Allan <bruce.w.allan@intel.com>
Signed-off-by: Tony Nguyen <anthony.l.nguyen@intel.com>
Tested-by: Andrew Bowers <andrewx.bowers@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
4 years agoice: update Unit Load Status bitmask to check after reset
Bruce Allan [Thu, 6 Feb 2020 09:20:07 +0000 (01:20 -0800)]
ice: update Unit Load Status bitmask to check after reset

After a reset the Unit Load Status bits in the GLNVM_ULD register to check
for completion should be 0x7FF before continuing.  Update the mask to check
(minus the three reserved bits that are always set).

Signed-off-by: Bruce Allan <bruce.w.allan@intel.com>
Signed-off-by: Tony Nguyen <anthony.l.nguyen@intel.com>
Tested-by: Andrew Bowers <andrewx.bowers@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
4 years agoice: fix and consolidate logging of NVM/firmware version information
Bruce Allan [Thu, 6 Feb 2020 09:20:06 +0000 (01:20 -0800)]
ice: fix and consolidate logging of NVM/firmware version information

Logging the firmware/NVM information during driver load is redundant since
that information is also available via ethtool.  Move the functionality
found in ice_nvm_version_str() directly into ice_get_drvinfo() and remove
calling the former and logging that info during driver probe.  This also
gets rid of a bug in ice_nvm_version_str() where it returns a pointer to
a buffer which is free'ed when that function exits.

Signed-off-by: Bruce Allan <bruce.w.allan@intel.com>
Tested-by: Andrew Bowers <andrewx.bowers@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
4 years agoice: Modify link message logging
Akeem G Abodunrin [Thu, 6 Feb 2020 09:20:05 +0000 (01:20 -0800)]
ice: Modify link message logging

This patch modifies link message logging to include "Full Duplex" and
"Negotiated" for FEC, so as to distinguish it from "Requested" FEC.

Signed-off-by: Akeem G Abodunrin <akeem.g.abodunrin@intel.com>
Tested-by: Andrew Bowers <andrewx.bowers@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
4 years agoice: Remove CONFIG_PCI_IOV wrap in ice_set_pf_caps
Anirudh Venkataramanan [Thu, 6 Feb 2020 09:20:04 +0000 (01:20 -0800)]
ice: Remove CONFIG_PCI_IOV wrap in ice_set_pf_caps

Remove unnecessary CONFIG_PCI_IOV wrapping in ice_set_pf_caps. None
of the data structures accessed within the block are wrapped with
this flag. When CONFIG_PCI_IOV is undefined, pf->num_vfs_supported
will be 0 anyway.

Signed-off-by: Anirudh Venkataramanan <anirudh.venkataramanan@intel.com>
Tested-by: Andrew Bowers <andrewx.bowers@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
4 years agoice: Remove ice_dev_onetime_setup()
Brett Creeley [Thu, 6 Feb 2020 09:20:03 +0000 (01:20 -0800)]
ice: Remove ice_dev_onetime_setup()

ice_dev_onetime_setup contains driver workarounds needed for
firmware limitations. These issues have now been resolved in newer
NVMs so remove the function.

Signed-off-by: Brett Creeley <brett.creeley@intel.com>
Signed-off-by: Tony Nguyen <anthony.l.nguyen@intel.com>
Tested-by: Andrew Bowers <andrewx.bowers@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
4 years agoice: Don't allow same value for Rx tail to be written twice
Brett Creeley [Thu, 6 Feb 2020 09:20:02 +0000 (01:20 -0800)]
ice: Don't allow same value for Rx tail to be written twice

Currently we compare the value we are about to write to the Rx tail
register with the previous value of next_to_use. The problem with this
is we only write tail on 8 descriptor boundaries, but next_to_use is
updated whenever we clean Rx descriptors. Fix this by comparing the
value we are about to write to tail with the previously written tail
value. This will prevent duplicate Rx tail bumps.

Signed-off-by: Brett Creeley <brett.creeley@intel.com>
Tested-by: Andrew Bowers <andrewx.bowers@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
4 years agoice: display supported and advertised link modes
Paul Greenwalt [Thu, 6 Feb 2020 09:20:01 +0000 (01:20 -0800)]
ice: display supported and advertised link modes

Display all of the supported and advertised link modes based on the PHY
capability with media.

Displaying all supported modes is more informative then only displaying
the current link mode.

Signed-off-by: Paul Greenwalt <paul.greenwalt@intel.com>
Tested-by: Andrew Bowers <andrewx.bowers@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
4 years agoice: Fix switch between FW and SW LLDP
Dave Ertman [Thu, 6 Feb 2020 09:20:00 +0000 (01:20 -0800)]
ice: Fix switch between FW and SW LLDP

When switching between FW and SW LLDP mode, the
number of configured TLV apps in the driver's
DCB configuration is getting out of synch with
what lldpad thinks is configured.  This is causing
a problem when shutting down lldpad.  The cleanup
is trying to delete TLV apps that are not defined
in the kernel.

Since the driver is keeping an accurate account
of the apps defined, use the drivers number of
apps to determine if there is an app to delete.
If the number of apps is <= 1, then do not
attempt to delete.

Signed-off-by: Dave Ertman <david.m.ertman@intel.com>
Tested-by: Andrew Bowers <andrewx.bowers@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
4 years agoice: Fix DCB rebuild after reset
Dave Ertman [Thu, 6 Feb 2020 09:19:59 +0000 (01:19 -0800)]
ice: Fix DCB rebuild after reset

The function ice_dcb_rebuild had some logic
flaws in it, and also didn't differentiate
between FW and SW modes needs.

For FW flow, the willing setting was being
forced to OFF and left that way.  Unwilling
in DCB FW mode is not a supported model.

Leave the config alone and use the return value
from the set command to determine if setting the
config was successful.

The SW DCB flow does not need to need to register
for MIB change events (as they are not used in
SW mode).

Use !is_sw_lldp checks to only perform FW specific
task while in FW mode.

Also adding a reapplication of the current DCB
config after a link event.  Some NVMs are not
maintaining their DCB configs across link events.

Signed-off-by: Dave Ertman <david.m.ertman@intel.com>
Tested-by: Andrew Bowers <andrewx.bowers@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
4 years agodocs: virt: guest-halt-polling.txt convert to ReST
Mauro Carvalho Chehab [Mon, 10 Feb 2020 06:03:06 +0000 (07:03 +0100)]
docs: virt: guest-halt-polling.txt convert to ReST

Due to some merge conflict, this file ended being alone under
Documentation/virtual.

The file itself is almost at ReST format. Just minor
adjustments are needed:

- Adjust title markup;
- Adjust a list identation;
- add a literal block markup;
- Add some blank lines.

Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
4 years agodocs: kvm: review-checklist.txt: rename to ReST
Mauro Carvalho Chehab [Mon, 10 Feb 2020 06:03:05 +0000 (07:03 +0100)]
docs: kvm: review-checklist.txt: rename to ReST

This file is already in ReST compatible format.
So, rename it and add to the kvm's index.rst.

While here, use the standard conversion for document titles.

Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>
Reviewed-by: Cornelia Huck <cohuck@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
4 years agodocs: kvm: Convert timekeeping.txt to ReST format
Mauro Carvalho Chehab [Mon, 10 Feb 2020 06:03:04 +0000 (07:03 +0100)]
docs: kvm: Convert timekeeping.txt to ReST format

- Use document title and chapter markups;
- Add markups for literal blocks;
- Add markups for tables;
- use :field: for field descriptions;
- Add blank lines and adjust indentation.

Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
4 years agodocs: kvm: Convert s390-diag.txt to ReST format
Mauro Carvalho Chehab [Mon, 10 Feb 2020 06:03:03 +0000 (07:03 +0100)]
docs: kvm: Convert s390-diag.txt to ReST format

This file is almost in ReST format. Just one change was
needed:

    - Add markups for a literal block and change its indentation.

While here, use the standard markup for the document title.

Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>
Reviewed-by: Cornelia Huck <cohuck@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
4 years agodocs: kvm: Convert ppc-pv.txt to ReST format
Mauro Carvalho Chehab [Mon, 10 Feb 2020 06:03:02 +0000 (07:03 +0100)]
docs: kvm: Convert ppc-pv.txt to ReST format

- Use document title and chapter markups;
- Add markups for tables;
- Use list markups;
- Add markups for literal blocks;
- Add blank lines.

Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
4 years agodocs: kvm: Convert nested-vmx.txt to ReST format
Mauro Carvalho Chehab [Mon, 10 Feb 2020 06:03:01 +0000 (07:03 +0100)]
docs: kvm: Convert nested-vmx.txt to ReST format

This file is almost in ReST format. Just a small set of
changes were needed:

    - Add markups for lists;
    - Add markups for a literal block;
    - Adjust whitespaces.

While here, use the standard markup for the document title.

Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
4 years agodocs: kvm: Convert mmu.txt to ReST format
Mauro Carvalho Chehab [Mon, 10 Feb 2020 06:03:00 +0000 (07:03 +0100)]
docs: kvm: Convert mmu.txt to ReST format

- Use document title and chapter markups;
- Add markups for tables;
- Add markups for literal blocks;
- Add blank lines and adjust indentation.

Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
4 years agodocs: kvm: Convert locking.txt to ReST format
Mauro Carvalho Chehab [Mon, 10 Feb 2020 06:02:59 +0000 (07:02 +0100)]
docs: kvm: Convert locking.txt to ReST format

- Use document title and chapter markups;
- Add markups for literal blocks;
- use :field: for field descriptions;
- Add blank lines and adjust indentation.

Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
4 years agodocs: kvm: Convert hypercalls.txt to ReST format
Mauro Carvalho Chehab [Mon, 10 Feb 2020 06:02:58 +0000 (07:02 +0100)]
docs: kvm: Convert hypercalls.txt to ReST format

- Use document title and chapter markups;
- Convert tables;
- Add markups for literal blocks;
- use :field: for field descriptions;
- Add blank lines and adjust indentation

Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
4 years agodocs: kvm: arm/psci.txt: convert to ReST
Mauro Carvalho Chehab [Mon, 10 Feb 2020 06:02:57 +0000 (07:02 +0100)]
docs: kvm: arm/psci.txt: convert to ReST

- Add a title for the document;
- Adjust whitespaces for it to be properly formatted after
  parsed.

Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
4 years agodocs: kvm: convert arm/hyp-abi.txt to ReST
Mauro Carvalho Chehab [Mon, 10 Feb 2020 06:02:56 +0000 (07:02 +0100)]
docs: kvm: convert arm/hyp-abi.txt to ReST

- Add proper markups for titles;
- Adjust whitespaces and blank lines to match ReST
  needs;
- Mark literal blocks as such.

Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
4 years agodocs: kvm: Convert api.txt to ReST format
Mauro Carvalho Chehab [Mon, 10 Feb 2020 06:02:55 +0000 (07:02 +0100)]
docs: kvm: Convert api.txt to ReST format

convert api.txt document to ReST format while trying to keep
its format as close as possible with the authors intent, and
avoid adding uneeded markups.

- Use document title and chapter markups;
- Convert tables;
- Add markups for literal blocks;
- use :field: for field descriptions;
- Add blank lines and adjust indentation

Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
4 years agodocs: kvm: convert devices/xive.txt to ReST
Mauro Carvalho Chehab [Mon, 10 Feb 2020 06:02:54 +0000 (07:02 +0100)]
docs: kvm: convert devices/xive.txt to ReST

- Use title markups;
- adjust indentation and add blank lines as needed;
- adjust tables to match ReST accepted formats;
- mark code blocks as such.

Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
4 years agodocs: kvm: convert devices/xics.txt to ReST
Mauro Carvalho Chehab [Mon, 10 Feb 2020 06:02:53 +0000 (07:02 +0100)]
docs: kvm: convert devices/xics.txt to ReST

- Use title markups;
- adjust indentation and add blank lines as needed;
- adjust tables to match ReST accepted formats;
- use :field: markups.

Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
4 years agodocs: kvm: convert devices/vm.txt to ReST
Mauro Carvalho Chehab [Mon, 10 Feb 2020 06:02:52 +0000 (07:02 +0100)]
docs: kvm: convert devices/vm.txt to ReST

- Use title markups;
- adjust indentation and add blank lines as needed;
- use :field: markups;
- Use cross-references;
- mark code blocks as such.

Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>
Reviewed-by: Cornelia Huck <cohuck@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
4 years agodocs: kvm: convert devices/vfio.txt to ReST
Mauro Carvalho Chehab [Mon, 10 Feb 2020 06:02:51 +0000 (07:02 +0100)]
docs: kvm: convert devices/vfio.txt to ReST

- Use standard title markup;
- adjust lists;
- mark code blocks as such.

Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>
Reviewed-by: Cornelia Huck <cohuck@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
4 years agodocs: kvm: convert devices/vcpu.txt to ReST
Mauro Carvalho Chehab [Mon, 10 Feb 2020 06:02:50 +0000 (07:02 +0100)]
docs: kvm: convert devices/vcpu.txt to ReST

- Use title markups;
- adjust indentation and add blank lines as needed;
- adjust tables to match ReST accepted formats;
- use :field: markups;
- mark code blocks as such.

Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
4 years agodocs: kvm: convert devices/s390_flic.txt to ReST
Mauro Carvalho Chehab [Mon, 10 Feb 2020 06:02:49 +0000 (07:02 +0100)]
docs: kvm: convert devices/s390_flic.txt to ReST

- Use standard markup for document title;
- Adjust indentation and add blank lines as needed;
- use the notes markup;
- mark code blocks as such.

Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>
Reviewed-by: Cornelia Huck <cohuck@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
4 years agodocs: kvm: convert devices/mpic.txt to ReST
Mauro Carvalho Chehab [Mon, 10 Feb 2020 06:02:48 +0000 (07:02 +0100)]
docs: kvm: convert devices/mpic.txt to ReST

This document is almost in ReST format. The only thing
needed is to mark a list as such and to add an extra
whitespace.

Yet, let's also use the standard document title markup,
as it makes easier if anyone wants later to add sessions
to it.

Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
4 years agodocs: kvm: convert devices/arm-vgit.txt to ReST
Mauro Carvalho Chehab [Mon, 10 Feb 2020 06:02:47 +0000 (07:02 +0100)]
docs: kvm: convert devices/arm-vgit.txt to ReST

- Use title markups;
- change indent to match ReST syntax;
- use proper table markups;
- use literal block markups.

Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
4 years agodocs: kvm: devices/arm-vgit-v3.txt to ReST
Mauro Carvalho Chehab [Mon, 10 Feb 2020 06:02:46 +0000 (07:02 +0100)]
docs: kvm: devices/arm-vgit-v3.txt to ReST

- Use title markups;
- change indent to match ReST syntax;
- use proper table markups;
- use literal block markups.

Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
4 years agodocs: kvm: devices/arm-vgic-its.txt to ReST format
Mauro Carvalho Chehab [Mon, 10 Feb 2020 06:02:45 +0000 (07:02 +0100)]
docs: kvm: devices/arm-vgic-its.txt to ReST format

- Fix document title to match ReST format
- Convert the table to be properly recognized
- use proper markups for literal blocks
- Some indentation fixes to match ReST

While here, add an index for kvm devices.

Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
4 years agodocs: virt: Convert msr.txt to ReST format
Mauro Carvalho Chehab [Mon, 10 Feb 2020 06:02:44 +0000 (07:02 +0100)]
docs: virt: Convert msr.txt to ReST format

- Use document title markup;
- Convert tables;
- Add blank lines and adjust indentation.

Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
4 years agodocs: virt: convert halt-polling.txt to ReST format
Mauro Carvalho Chehab [Mon, 10 Feb 2020 06:02:43 +0000 (07:02 +0100)]
docs: virt: convert halt-polling.txt to ReST format

- Fix document title to match ReST format
- Convert the table to be properly recognized
- Some indentation fixes to match ReST syntax.

Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>
Reviewed-by: Cornelia Huck <cohuck@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
4 years agodocs: virt: user_mode_linux.rst: fix URL references
Mauro Carvalho Chehab [Mon, 10 Feb 2020 06:02:42 +0000 (07:02 +0100)]
docs: virt: user_mode_linux.rst: fix URL references

Several URLs are pointing to outdated places.

Update the references for the URLs whose contents still exists,
removing the others.

Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
4 years agodocs: virt: user_mode_linux.rst: update compiling instructions
Mauro Carvalho Chehab [Mon, 10 Feb 2020 06:02:41 +0000 (07:02 +0100)]
docs: virt: user_mode_linux.rst: update compiling instructions

Instead of pointing for a pre-2.4 and a seaparate patch,
update it to match current upstream, as UML was merged
a long time ago.

Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
4 years agodocs: virt: convert UML documentation to ReST
Mauro Carvalho Chehab [Mon, 10 Feb 2020 06:02:40 +0000 (07:02 +0100)]
docs: virt: convert UML documentation to ReST

Despite being an old document, it contains lots of information
that could still be useful.

The document has a nice style with makes easy to convert to
ReST. So, let's convert it to ReST.

This patch does:

- Use proper markups for titles;
- Mark and proper indent literal blocks;
- don't use an 'o' character for lists;
- other minor changes required for the doc to be parsed.

Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
4 years agodocs: kvm: add arm/pvtime.rst to index.rst
Mauro Carvalho Chehab [Mon, 10 Feb 2020 06:02:39 +0000 (07:02 +0100)]
docs: kvm: add arm/pvtime.rst to index.rst

Add this file to a new kvm/arm index.rst, in order for it to
be shown as part of the virt book.

Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
4 years agoKVM: x86: fix WARN_ON check of an unsigned less than zero
Paolo Bonzini [Wed, 12 Feb 2020 12:27:10 +0000 (13:27 +0100)]
KVM: x86: fix WARN_ON check of an unsigned less than zero

The check cpu->hv_clock.system_time < 0 is redundant since system_time
is a u64 and hence can never be less than zero.  But what was actually
meant is to check that the result is positive, since kernel_ns and
v->kvm->arch.kvmclock_offset are both s64.

Reported-by: Colin King <colin.king@canonical.com>
Suggested-by: Sean Christopherson <sean.j.christopherson@intel.com>
Addresses-Coverity: ("Macro compares unsigned to 0")
Reviewed-by: Miaohe Lin <linmiaohe@huawei.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
4 years agoselftests: KVM: Remove unused x86_register enum
Eric Auger [Fri, 7 Feb 2020 14:27:13 +0000 (15:27 +0100)]
selftests: KVM: Remove unused x86_register enum

x86_register enum is not used, let's remove it.

Signed-off-by: Eric Auger <eric.auger@redhat.com>
Suggested-by: Vitaly Kuznetsov <vkuznets@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
4 years agoKVM: x86/mmu: Fix struct guest_walker arrays for 5-level paging
Sean Christopherson [Fri, 7 Feb 2020 17:37:42 +0000 (09:37 -0800)]
KVM: x86/mmu: Fix struct guest_walker arrays for 5-level paging

Define PT_MAX_FULL_LEVELS as PT64_ROOT_MAX_LEVEL, i.e. 5, to fix shadow
paging for 5-level guest page tables.  PT_MAX_FULL_LEVELS is used to
size the arrays that track guest pages table information, i.e. using a
"max levels" of 4 causes KVM to access garbage beyond the end of an
array when querying state for level 5 entries.  E.g. FNAME(gpte_changed)
will read garbage and most likely return %true for a level 5 entry,
soft-hanging the guest because FNAME(fetch) will restart the guest
instead of creating SPTEs because it thinks the guest PTE has changed.

Note, KVM doesn't yet support 5-level nested EPT, so PT_MAX_FULL_LEVELS
gets to stay "4" for the PTTYPE_EPT case.

Fixes: 855feb673640 ("KVM: MMU: Add 5 level EPT & Shadow page table support.")
Cc: stable@vger.kernel.org
Signed-off-by: Sean Christopherson <sean.j.christopherson@intel.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
4 years agoKVM: nVMX: Use correct root level for nested EPT shadow page tables
Sean Christopherson [Fri, 7 Feb 2020 17:37:41 +0000 (09:37 -0800)]
KVM: nVMX: Use correct root level for nested EPT shadow page tables

Hardcode the EPT page-walk level for L2 to be 4 levels, as KVM's MMU
currently also hardcodes the page walk level for nested EPT to be 4
levels.  The L2 guest is all but guaranteed to soft hang on its first
instruction when L1 is using EPT, as KVM will construct 4-level page
tables and then tell hardware to use 5-level page tables.

Fixes: 855feb673640 ("KVM: MMU: Add 5 level EPT & Shadow page table support.")
Cc: stable@vger.kernel.org
Signed-off-by: Sean Christopherson <sean.j.christopherson@intel.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
4 years agoKVM: nVMX: Fix some comment typos and coding style
Miaohe Lin [Fri, 7 Feb 2020 15:22:45 +0000 (23:22 +0800)]
KVM: nVMX: Fix some comment typos and coding style

Fix some typos in the comments. Also fix coding style.
[Sean Christopherson rewrites the comment of write_fault_to_shadow_pgtable
field in struct kvm_vcpu_arch.]

Signed-off-by: Miaohe Lin <linmiaohe@huawei.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
4 years agoKVM: x86/mmu: Avoid retpoline on ->page_fault() with TDP
Sean Christopherson [Thu, 6 Feb 2020 22:14:34 +0000 (14:14 -0800)]
KVM: x86/mmu: Avoid retpoline on ->page_fault() with TDP

Wrap calls to ->page_fault() with a small shim to directly invoke the
TDP fault handler when the kernel is using retpolines and TDP is being
used.  Single out the TDP fault handler and annotate the TDP path as
likely to coerce the compiler into preferring it over the indirect
function call.

Rename tdp_page_fault() to kvm_tdp_page_fault(), as it's exposed outside
of mmu.c to allow inlining the shim.

Signed-off-by: Sean Christopherson <sean.j.christopherson@intel.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
4 years agoKVM: apic: reuse smp_wmb() in kvm_make_request()
Miaohe Lin [Fri, 7 Feb 2020 15:22:07 +0000 (23:22 +0800)]
KVM: apic: reuse smp_wmb() in kvm_make_request()

kvm_make_request() provides smp_wmb() so pending_events changes are
guaranteed to be visible.

Signed-off-by: Miaohe Lin <linmiaohe@huawei.com>
Reviewed-by: Vitaly Kuznetsov <vkuznets@redhat.com>
Reviewed-by: Sean Christopherson <sean.j.christopherson@intel.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
4 years agoKVM: x86: remove duplicated KVM_REQ_EVENT request
Miaohe Lin [Fri, 7 Feb 2020 15:27:51 +0000 (23:27 +0800)]
KVM: x86: remove duplicated KVM_REQ_EVENT request

The KVM_REQ_EVENT request is already made in kvm_set_rflags(). We should
not make it again.

Signed-off-by: Miaohe Lin <linmiaohe@huawei.com>
Reviewed-by: Vitaly Kuznetsov <vkuznets@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>