Shirish S [Mon, 27 Jan 2020 11:05:24 +0000 (16:35 +0530)]
amdgpu/gmc_v9: save/restore sdpif regs during S3
fixes S3 issue with IOMMU + S/G enabled @ 64M VRAM.
Suggested-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Shirish S <shirish.s@amd.com>
Reviewed-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Cc: stable@vger.kernel.org
Monk Liu [Sat, 8 Feb 2020 11:01:21 +0000 (19:01 +0800)]
drm/amdgpu: fix memory leak during TDR test(v2)
fix system memory leak
v2:
fix coding style
Signed-off-by: Monk Liu <Monk.Liu@amd.com>
Reviewed-by: Hawking Zhang <Hawking.Zhang@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Jens Axboe [Tue, 25 Feb 2020 15:47:30 +0000 (08:47 -0700)]
io-wq: remove spin-for-work optimization
Andres reports that buffered IO seems to suck up more cycles than we
would like, and he narrowed it down to the fact that the io-wq workers
will briefly spin for more work on completion of a work item. This was
a win on the networking side, but apparently some other cases take a
hit because of it. Remove the optimization to avoid burning more CPU
than we have to for disk IO.
Reported-by: Andres Freund <andres@anarazel.de>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
Xiaoguang Wang [Tue, 25 Feb 2020 14:12:08 +0000 (22:12 +0800)]
io_uring: fix poll_list race for SETUP_IOPOLL|SETUP_SQPOLL
After making ext4 support iopoll method:
let ext4_file_operations's iopoll method be iomap_dio_iopoll(),
we found fio can easily hang in fio_ioring_getevents() with below fio
job:
rm -f testfile; sync;
sudo fio -name=fiotest -filename=testfile -iodepth=128 -thread
-rw=write -ioengine=io_uring -hipri=1 -sqthread_poll=1 -direct=1
-bs=4k -size=10G -numjobs=8 -runtime=2000 -group_reporting
with IORING_SETUP_SQPOLL and IORING_SETUP_IOPOLL enabled.
There are two issues that results in this hang, one reason is that
when IORING_SETUP_SQPOLL and IORING_SETUP_IOPOLL are enabled, fio
does not use io_uring_enter to get completed events, it relies on
kernel io_sq_thread to poll for completed events.
Another reason is that there is a race: when io_submit_sqes() in
io_sq_thread() submits a batch of sqes, variable 'inflight' will
record the number of submitted reqs, then io_sq_thread will poll for
reqs which have been added to poll_list. But note, if some previous
reqs have been punted to io worker, these reqs will won't be in
poll_list timely. io_sq_thread() will only poll for a part of previous
submitted reqs, and then find poll_list is empty, reset variable
'inflight' to be zero. If app just waits these deferred reqs and does
not wake up io_sq_thread again, then hang happens.
For app that entirely relies on io_sq_thread to poll completed requests,
let io_iopoll_req_issued() wake up io_sq_thread properly when adding new
element to poll_list, and when io_sq_thread prepares to sleep, check
whether poll_list is empty again, if not empty, continue to poll.
Signed-off-by: Xiaoguang Wang <xiaoguang.wang@linux.alibaba.com>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
Jan Kara [Thu, 6 Feb 2020 14:28:12 +0000 (15:28 +0100)]
blktrace: Protect q->blk_trace with RCU
KASAN is reporting that __blk_add_trace() has a use-after-free issue
when accessing q->blk_trace. Indeed the switching of block tracing (and
thus eventual freeing of q->blk_trace) is completely unsynchronized with
the currently running tracing and thus it can happen that the blk_trace
structure is being freed just while __blk_add_trace() works on it.
Protect accesses to q->blk_trace by RCU during tracing and make sure we
wait for the end of RCU grace period when shutting down tracing. Luckily
that is rare enough event that we can afford that. Note that postponing
the freeing of blk_trace to an RCU callback should better be avoided as
it could have unexpected user visible side-effects as debugfs files
would be still existing for a short while block tracing has been shut
down.
Link: https://bugzilla.kernel.org/show_bug.cgi?id=205711
CC: stable@vger.kernel.org
Reviewed-by: Chaitanya Kulkarni <chaitanya.kulkarni@wdc.com>
Reviewed-by: Ming Lei <ming.lei@redhat.com>
Tested-by: Ming Lei <ming.lei@redhat.com>
Reviewed-by: Bart Van Assche <bvanassche@acm.org>
Reported-by: Tristan Madani <tristmd@gmail.com>
Signed-off-by: Jan Kara <jack@suse.cz>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
Stefano Brivio [Fri, 21 Feb 2020 02:11:56 +0000 (03:11 +0100)]
selftests: nft_concat_range: Move option for 'list ruleset' before command
Before nftables commit
fb9cea50e8b3 ("main: enforce options before
commands"), 'nft list ruleset -a' happened to work, but it's wrong
and won't work anymore. Replace it by 'nft -a list ruleset'.
Reported-by: Chen Yi <yiche@redhat.com>
Fixes:
611973c1e06f ("selftests: netfilter: Introduce tests for sets with range concatenation")
Signed-off-by: Stefano Brivio <sbrivio@redhat.com>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
Kees Cook [Sat, 22 Feb 2020 00:02:39 +0000 (16:02 -0800)]
docs: Fix empty parallelism argument
When there was no parallelism (no top-level -j arg and a pre-1.7
sphinx-build), the argument passed would be empty ("") instead of just
being missing, which would (understandably) badly confuse sphinx-build.
Fix this by removing the quotes.
Reported-by: Rafael J. Wysocki <rafael@kernel.org>
Fixes:
51e46c7a4007 ("docs, parallelism: Rearrange how jobserver reservations are made")
Cc: stable@vger.kernel.org # v5.5 only
Signed-off-by: Kees Cook <keescook@chromium.org>
Signed-off-by: Jonathan Corbet <corbet@lwn.net>
Stephen Kitt [Fri, 21 Feb 2020 20:57:33 +0000 (21:57 +0100)]
docs: remove MPX from the x86 toc
MPX was removed in commit
45fc24e89b7c ("x86/mpx: remove MPX from
arch/x86"), this removes the corresponding entry in the x86 toc.
This was suggested by a Sphinx warning.
Signed-off-by: Stephen Kitt <steve@sk2.org>
Fixes:
45fc24e89b7cc ("x86/mpx: remove MPX from arch/x86")
Acked-by: Dave Hansen <dave.hansen@intel.com>
Signed-off-by: Jonathan Corbet <corbet@lwn.net>
Tina Zhang [Tue, 25 Feb 2020 05:35:27 +0000 (13:35 +0800)]
drm/i915/gvt: Fix orphan vgpu dmabuf_objs' lifetime
Deleting dmabuf item's list head after releasing its container can lead
to KASAN-reported issue:
BUG: KASAN: use-after-free in __list_del_entry_valid+0x15/0xf0
Read of size 8 at addr
ffff88818a4598a8 by task kworker/u8:3/13119
So fix this issue by puting deleting dmabuf_objs ahead of releasing its
container.
Fixes:
dfb6ae4e14bd6 ("drm/i915/gvt: Handle orphan dmabuf_objs")
Signed-off-by: Tina Zhang <tina.zhang@intel.com>
Reviewed-by: Zhenyu Wang <zhenyuw@linux.intel.com>
Signed-off-by: Zhenyu Wang <zhenyuw@linux.intel.com>
Link: http://patchwork.freedesktop.org/patch/msgid/20200225053527.8336-2-tina.zhang@intel.com
Paul Burton [Sat, 22 Feb 2020 17:04:17 +0000 (09:04 -0800)]
MAINTAINERS: Hand MIPS over to Thomas
My time with MIPS the company has reached its end, and so at best I'll
have little time spend on maintaining arch/mips/.
Ralf last authored a patch over 2 years ago, the last time he committed
one is even further back & activity was sporadic for a while before
that. The reality is that he isn't active.
Having a new maintainer with time to do things properly will be
beneficial all round. Thomas Bogendoerfer has been involved in MIPS
development for a long time & has offered to step up as maintainer, so
add Thomas and remove myself & Ralf from the MIPS entry.
Ralf already has an entry in CREDITS to honor his contributions, so this
just adds one for me.
Signed-off-by: Paul Burton <paulburton@kernel.org>
Reviewed-by: Philippe Mathieu-Daudé <f4bug@amsat.org>
Acked-by: Thomas Bogendoerfer <tsbogend@alpha.franken.de>
Cc: Ralf Baechle <ralf@linux-mips.org>
Cc: linux-kernel@vger.kernel.org
Cc: linux-mips@vger.kernel.org
Ming Lei [Tue, 25 Feb 2020 01:04:32 +0000 (09:04 +0800)]
blk-mq: insert passthrough request into hctx->dispatch directly
For some reason, device may be in one situation which can't handle
FS request, so STS_RESOURCE is always returned and the FS request
will be added to hctx->dispatch. However passthrough request may
be required at that time for fixing the problem. If passthrough
request is added to scheduler queue, there isn't any chance for
blk-mq to dispatch it given we prioritize requests in hctx->dispatch.
Then the FS IO request may never be completed, and IO hang is caused.
So passthrough request has to be added to hctx->dispatch directly
for fixing the IO hang.
Fix this issue by inserting passthrough request into hctx->dispatch
directly together withing adding FS request to the tail of
hctx->dispatch in blk_mq_dispatch_rq_list(). Actually we add FS request
to tail of hctx->dispatch at default, see blk_mq_request_bypass_insert().
Then it becomes consistent with original legacy IO request
path, in which passthrough request is always added to q->queue_head.
Cc: Dongli Zhang <dongli.zhang@oracle.com>
Cc: Christoph Hellwig <hch@infradead.org>
Cc: Ewan D. Milne <emilne@redhat.com>
Signed-off-by: Ming Lei <ming.lei@redhat.com>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
David S. Miller [Mon, 24 Feb 2020 23:43:38 +0000 (15:43 -0800)]
Merge tag 'mac80211-for-net-2020-02-24' of git://git./linux/kernel/git/jberg/mac80211
Johannes Berg
====================
A few fixes:
* remove a double mutex-unlock
* fix a leak in an error path
* NULL pointer check
* include if_vlan.h where needed
* avoid RCU list traversal when not under RCU
====================
Signed-off-by: David S. Miller <davem@davemloft.net>
Paul Moore [Mon, 24 Feb 2020 21:38:57 +0000 (16:38 -0500)]
audit: always check the netlink payload length in audit_receive_msg()
This patch ensures that we always check the netlink payload length
in audit_receive_msg() before we take any action on the payload
itself.
Cc: stable@vger.kernel.org
Reported-by: syzbot+399c44bf1f43b8747403@syzkaller.appspotmail.com
Reported-by: syzbot+e4b12d8d202701f08b6d@syzkaller.appspotmail.com
Signed-off-by: Paul Moore <paul@paul-moore.com>
Zong Li [Fri, 7 Feb 2020 09:52:45 +0000 (17:52 +0800)]
riscv: adjust the indent
Adjust the indent to match Linux coding style.
Signed-off-by: Zong Li <zong.li@sifive.com>
Signed-off-by: Palmer Dabbelt <palmerdabbelt@google.com>
Zong Li [Fri, 7 Feb 2020 09:52:44 +0000 (17:52 +0800)]
riscv: allocate a complete page size for each page table
Each page table should be created by allocating a complete page size
for it. Otherwise, the content of the page table would be corrupted
somewhere through memory allocation which allocates the memory at the
middle of the page table for other use.
Signed-off-by: Zong Li <zong.li@sifive.com>
Signed-off-by: Palmer Dabbelt <palmerdabbelt@google.com>
Adam Williamson [Wed, 19 Feb 2020 16:50:07 +0000 (17:50 +0100)]
scsi: compat_ioctl: cdrom: Replace .ioctl with .compat_ioctl in four appropriate places
Arnd Bergmann inadvertently typoed these in
d320a9551e394 and
64cbfa96551a;
they seem to be the cause of
https://bugzilla.redhat.com/show_bug.cgi?id=1801353 , invalid SCSI commands
when udev tries to query a DVD drive.
[arnd] Found another instance of the same bug, also introduced in my
compat_ioctl series.
Link: https://bugzilla.redhat.com/show_bug.cgi?id=1801353
Link: https://lore.kernel.org/r/20200219165139.3467320-1-arnd@arndb.de
Fixes:
c103d6ee69f9 ("compat_ioctl: ide: floppy: add handler")
Fixes:
64cbfa96551a ("compat_ioctl: move cdrom commands into cdrom.c")
Fixes:
d320a9551e39 ("compat_ioctl: scsi: move ioctl handling into drivers")
Bisected-by: Chris Murphy <bugzilla@colorremedies.com>
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Adam Williamson <awilliam@redhat.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Linus Torvalds [Mon, 24 Feb 2020 19:48:17 +0000 (11:48 -0800)]
Merge tag 'for-linus' of git://git./virt/kvm/kvm
Pull kvm fixes from Paolo Bonzini:
"Bugfixes, including the fix for CVE-2020-2732 and a few issues found
by 'make W=1'"
* tag 'for-linus' of git://git.kernel.org/pub/scm/virt/kvm/kvm:
KVM: s390: rstify new ioctls in api.rst
KVM: nVMX: Check IO instruction VM-exit conditions
KVM: nVMX: Refactor IO bitmap checks into helper function
KVM: nVMX: Don't emulate instructions in guest mode
KVM: nVMX: Emulate MTF when performing instruction emulation
KVM: fix error handling in svm_hardware_setup
KVM: SVM: Fix potential memory leak in svm_cpu_init()
KVM: apic: avoid calculating pending eoi from an uninitialized val
KVM: nVMX: clear PIN_BASED_POSTED_INTR from nested pinbased_ctls only when apicv is globally disabled
KVM: nVMX: handle nested posted interrupts when apicv is disabled for L1
kvm: x86: svm: Fix NULL pointer dereference when AVIC not enabled
KVM: VMX: Add VMX_FEATURE_USR_WAIT_PAUSE
KVM: nVMX: Hold KVM's srcu lock when syncing vmcs12->shadow
KVM: x86: don't notify userspace IOAPIC on edge-triggered interrupt EOI
kvm/emulate: fix a -Werror=cast-function-type
KVM: x86: fix incorrect comparison in trace event
KVM: nVMX: Fix some obsolete comments and grammar error
KVM: x86: fix missing prototypes
KVM: x86: enable -Werror
Linus Torvalds [Mon, 24 Feb 2020 19:40:23 +0000 (11:40 -0800)]
Merge branch 'linus' of git://git./linux/kernel/git/herbert/crypto-2.6
Pull crypto fixes from Herbert Xu:
"This fixes a Kconfig-related build error and an integer overflow in
chacha20poly1305"
* 'linus' of git://git.kernel.org/pub/scm/linux/kernel/git/herbert/crypto-2.6:
crypto: chacha20poly1305 - prevent integer overflow on large input
tee: amdtee: amdtee depends on CRYPTO_DEV_CCP_DD
Linus Torvalds [Mon, 24 Feb 2020 19:32:15 +0000 (11:32 -0800)]
Merge branch 'fixes' of git://git./linux/kernel/git/viro/vfs
Pull tmpfs fix from Al Viro:
"Regression from fs_parse series this cycle..."
* 'fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs:
tmpfs: deny and force are not huge mount options
Linus Torvalds [Fri, 21 Feb 2020 20:43:35 +0000 (12:43 -0800)]
floppy: check FDC index for errors before assigning it
Jordy Zomer reported a KASAN out-of-bounds read in the floppy driver in
wait_til_ready().
Which on the face of it can't happen, since as Willy Tarreau points out,
the function does no particular memory access. Except through the FDCS
macro, which just indexes a static allocation through teh current fdc,
which is always checked against N_FDC.
Except the checking happens after we've already assigned the value.
The floppy driver is a disgrace (a lot of it going back to my original
horrd "design"), and has no real maintainer. Nobody has the hardware,
and nobody really cares. But it still gets used in virtual environment
because it's one of those things that everybody supports.
The whole thing should be re-written, or at least parts of it should be
seriously cleaned up. The 'current fdc' index, which is used by the
FDCS macro, and which is often shadowed by a local 'fdc' variable, is a
prime example of how not to write code.
But because nobody has the hardware or the motivation, let's just fix up
the immediate problem with a nasty band-aid: test the fdc index before
actually assigning it to the static 'fdc' variable.
Reported-by: Jordy Zomer <jordy@simplyhacker.com>
Cc: Willy Tarreau <w@1wt.eu>
Cc: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Nikolay Aleksandrov [Mon, 24 Feb 2020 16:46:22 +0000 (18:46 +0200)]
net: bridge: fix stale eth hdr pointer in br_dev_xmit
In br_dev_xmit() we perform vlan filtering in br_allowed_ingress() but
if the packet has the vlan header inside (e.g. bridge with disabled
tx-vlan-offload) then the vlan filtering code will use skb_vlan_untag()
to extract the vid before filtering which in turn calls pskb_may_pull()
and we may end up with a stale eth pointer. Moreover the cached eth header
pointer will generally be wrong after that operation. Remove the eth header
caching and just use eth_hdr() directly, the compiler does the right thing
and calculates it only once so we don't lose anything.
Fixes:
057658cb33fb ("bridge: suppress arp pkts on BR_NEIGH_SUPPRESS ports")
Signed-off-by: Nikolay Aleksandrov <nikolay@cumulusnetworks.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
David S. Miller [Mon, 24 Feb 2020 18:58:57 +0000 (10:58 -0800)]
Merge branch 'net-ll_temac-Bugfixes'
Esben Haabendal says:
====================
net: ll_temac: Bugfixes
Fix a number of bugs which have been present since the first commit.
The bugs fixed in patch 1,2 and 4 have all been observed in real systems, and
was relatively easy to reproduce given an appropriate stress setup.
Changes since v1:
- Changed error handling of of dma_map_single() in temac_start_xmit() to drop
packet instead of returning NETDEV_TX_BUSY.
====================
Signed-off-by: David S. Miller <davem@davemloft.net>
Esben Haabendal [Fri, 21 Feb 2020 06:47:58 +0000 (07:47 +0100)]
net: ll_temac: Handle DMA halt condition caused by buffer underrun
The SDMA engine used by TEMAC halts operation when it has finished
processing of the last buffer descriptor in the buffer ring.
Unfortunately, no interrupt event is generated when this happens,
so we need to setup another mechanism to make sure DMA operation is
restarted when enough buffers have been added to the ring.
Fixes:
92744989533c ("net: add Xilinx ll_temac device driver")
Signed-off-by: Esben Haabendal <esben@geanix.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Esben Haabendal [Fri, 21 Feb 2020 06:47:45 +0000 (07:47 +0100)]
net: ll_temac: Fix RX buffer descriptor handling on GFP_ATOMIC pressure
Failures caused by GFP_ATOMIC memory pressure have been observed, and
due to the missing error handling, results in kernel crash such as
[1876998.350133] kernel BUG at mm/slub.c:3952!
[1876998.350141] invalid opcode: 0000 [#1] PREEMPT SMP PTI
[1876998.350147] CPU: 2 PID: 0 Comm: swapper/2 Not tainted 5.3.0-scnxt #1
[1876998.350150] Hardware name: N/A N/A/COMe-bIP2, BIOS CCR2R920 03/01/2017
[1876998.350160] RIP: 0010:kfree+0x1ca/0x220
[1876998.350164] Code: 85 db 74 49 48 8b 95 68 01 00 00 48 31 c2 48 89 10 e9 d7 fe ff ff 49 8b 04 24 a9 00 00 01 00 75 0b 49 8b 44 24 08 a8 01 75 02 <0f> 0b 49 8b 04 24 31 f6 a9 00 00 01 00 74 06 41 0f b6 74 24
5b
[1876998.350172] RSP: 0018:
ffffc900000f0df0 EFLAGS:
00010246
[1876998.350177] RAX:
ffffea00027f0708 RBX:
ffff888008d78000 RCX:
0000000000391372
[1876998.350181] RDX:
0000000000000000 RSI:
ffffe8ffffd01400 RDI:
ffff888008d78000
[1876998.350185] RBP:
ffff8881185a5d00 R08:
ffffc90000087dd8 R09:
000000000000280a
[1876998.350189] R10:
0000000000000002 R11:
0000000000000000 R12:
ffffea0000235e00
[1876998.350193] R13:
ffff8881185438a0 R14:
0000000000000000 R15:
ffff888118543870
[1876998.350198] FS:
0000000000000000(0000) GS:
ffff88811f300000(0000) knlGS:
0000000000000000
[1876998.350203] CS: 0010 DS: 0000 ES: 0000 CR0:
0000000080050033
s#1 Part1
[1876998.350206] CR2:
00007f8dac7b09f0 CR3:
000000011e20a006 CR4:
00000000001606e0
[1876998.350210] Call Trace:
[1876998.350215] <IRQ>
[1876998.350224] ? __netif_receive_skb_core+0x70a/0x920
[1876998.350229] kfree_skb+0x32/0xb0
[1876998.350234] __netif_receive_skb_core+0x70a/0x920
[1876998.350240] __netif_receive_skb_one_core+0x36/0x80
[1876998.350245] process_backlog+0x8b/0x150
[1876998.350250] net_rx_action+0xf7/0x340
[1876998.350255] __do_softirq+0x10f/0x353
[1876998.350262] irq_exit+0xb2/0xc0
[1876998.350265] do_IRQ+0x77/0xd0
[1876998.350271] common_interrupt+0xf/0xf
[1876998.350274] </IRQ>
In order to handle such failures more graceful, this change splits the
receive loop into one for consuming the received buffers, and one for
allocating new buffers.
When GFP_ATOMIC allocations fail, the receive will continue with the
buffers that is still there, and with the expectation that the allocations
will succeed in a later call to receive.
Fixes:
92744989533c ("net: add Xilinx ll_temac device driver")
Signed-off-by: Esben Haabendal <esben@geanix.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Esben Haabendal [Fri, 21 Feb 2020 06:47:33 +0000 (07:47 +0100)]
net: ll_temac: Add more error handling of dma_map_single() calls
This adds error handling to the remaining dma_map_single() calls, so that
behavior is well defined if/when we run out of DMA memory.
Fixes:
92744989533c ("net: add Xilinx ll_temac device driver")
Signed-off-by: Esben Haabendal <esben@geanix.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Esben Haabendal [Fri, 21 Feb 2020 06:47:21 +0000 (07:47 +0100)]
net: ll_temac: Fix race condition causing TX hang
It is possible that the interrupt handler fires and frees up space in
the TX ring in between checking for sufficient TX ring space and
stopping the TX queue in temac_start_xmit. If this happens, the
queue wake from the interrupt handler will occur before the queue is
stopped, causing a lost wakeup and the adapter's transmit hanging.
To avoid this, after stopping the queue, check again whether there is
sufficient space in the TX ring. If so, wake up the queue again.
This is a port of the similar fix in axienet driver,
commit
7de44285c1f6 ("net: axienet: Fix race condition causing TX hang").
Fixes:
23ecc4bde21f ("net: ll_temac: fix checksum offload logic")
Signed-off-by: Esben Haabendal <esben@geanix.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Christian Borntraeger [Mon, 24 Feb 2020 10:15:59 +0000 (11:15 +0100)]
KVM: s390: rstify new ioctls in api.rst
We also need to rstify the new ioctls that we added in parallel to the
rstification of the kvm docs.
Signed-off-by: Christian Borntraeger <borntraeger@de.ibm.com>
Reviewed-by: David Hildenbrand <david@redhat.com>
Reviewed-by: Cornelia Huck <cohuck@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Benjamin Block [Wed, 19 Feb 2020 15:09:25 +0000 (16:09 +0100)]
scsi: zfcp: fix wrong data and display format of SFP+ temperature
When implementing support for retrieval of local diagnostic data from the
FCP channel, the wrong data format was assumed for the temperature of the
local SFP+ connector. The Fibre Channel Link Services (FC-LS-3)
specification is not clear on the format of the stored integer, and only
after consulting the SNIA specification SFF-8472 did we realize it is
stored as two's complement. Thus, the used data and display format is
wrong, and highly misleading for users when the temperature should drop
below 0°C (however unlikely that may be).
To fix this, change the data format in `struct fsf_qtcb_bottom_port` from
unsigned to signed, and change the printf format string used to generate
`zfcp_sysfs_adapter_diag_sfp_temperature_show()` from `%hu` to `%hd`.
Link: https://lore.kernel.org/r/d6e3be5428da5c9490cfff4df7cae868bc9f1a7e.1582039501.git.bblock@linux.ibm.com
Fixes:
a10a61e807b0 ("scsi: zfcp: support retrieval of SFP Data via Exchange Port Data")
Fixes:
6028f7c4cd87 ("scsi: zfcp: introduce sysfs interface for diagnostics of local SFP transceiver")
Cc: <stable@vger.kernel.org> # 5.5+
Reviewed-by: Jens Remus <jremus@linux.ibm.com>
Reviewed-by: Fedor Loshakov <loshakov@linux.ibm.com>
Reviewed-by: Steffen Maier <maier@linux.ibm.com>
Signed-off-by: Benjamin Block <bblock@linux.ibm.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Damien Le Moal [Wed, 19 Feb 2020 06:38:00 +0000 (15:38 +0900)]
scsi: sd_sbc: Fix sd_zbc_report_zones()
The block layer generic blk_revalidate_disk_zones() checks the validity of
zone descriptors reported by a disk using the blk_revalidate_zone_cb()
callback function executed for each zone descriptor. If a ZBC disk reports
invalid zone descriptors, blk_revalidate_disk_zones() returns an error and
sd_zbc_read_zones() changes the disk capacity to 0, which in turn results
in the gendisk structure capacity to be set to 0. This all works well for
the first revalidate pass on a disk and the block layer detects the
capactiy change.
On the second revalidate pass, blk_revalidate_disk_zones() is called again
and sd_zbc_report_zones() executed to check the zones a second time.
However, for this second pass, the gendisk capacity is now 0, which results
in sd_zbc_report_zones() to do nothing and to report success and no
zones. blk_revalidate_disk_zones() in turn returns success and sets the
disk queue chunk_sectors limit with zero as no zones were checked, causing
a oops to trigger on the BUG_ON(!is_power_of_2(chunk_sectors)) in
blk_queue_chunk_sectors().
Fix this by using the sdkp capacity field rather than the gendisk capacity
for the report zones loop in sd_zbc_report_zones(). Also add a check to
return immediately an error if the sdkp capacity is 0. With this fix,
invalid/buggy ZBC disk scan does not trigger a oops and are exposed with a
0 capacity. This change also preserve the chance for the disk to be
correctly revalidated on the second revalidate pass as the scsi disk
structure capacity field is always set to the disk reported value when
sd_zbc_report_zones() is called.
Link: https://lore.kernel.org/r/20200219063800.880834-1-damien.lemoal@wdc.com
Fixes:
d41003513e61 ("block: rework zone reporting")
Cc: Cc: <stable@vger.kernel.org> # v5.5
Reviewed-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Johannes Thumshirn <johannes.thumshirn@wdc.com>
Signed-off-by: Damien Le Moal <damien.lemoal@wdc.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Jens Axboe [Sun, 23 Feb 2020 20:11:42 +0000 (13:11 -0700)]
io_uring: fix personality idr leak
We somehow never free the idr, even though we init it for every ctx.
Free it when the rest of the ring data is freed.
Fixes:
071698e13ac6 ("io_uring: allow registering credentials")
Reviewed-by: Stefano Garzarella <sgarzare@redhat.com>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
Tina Zhang [Fri, 21 Feb 2020 02:32:34 +0000 (10:32 +0800)]
drm/i915/gvt: Separate display reset from ALL_ENGINES reset
ALL_ENGINES reset doesn't clobber display with the current gvt-g
supported platforms. Thus ALL_ENGINES reset shouldn't reset the
display engine registers emulated by gvt-g.
This fixes guest warning like
[ 14.622026] [drm] Initialized i915 1.6.0
20200114 for 0000:00:03.0 on minor 0
[ 14.967917] fbcon: i915drmfb (fb0) is primary device
[ 25.100188] [drm:drm_atomic_helper_wait_for_dependencies [drm_kms_helper]] E RROR [CRTC:51:pipe A] flip_done timed out
[ 25.100860] -----------[ cut here ]-----------
[ 25.100861] pll on state mismatch (expected 0, found 1)
[ 25.101024] WARNING: CPU: 1 PID: 30 at drivers/gpu/drm/i915/display/intel_dis play.c:14382 verify_single_dpll_state.isra.115+0x28f/0x320 [i915]
[ 25.101025] Modules linked in: intel_rapl_msr intel_rapl_common kvm_intel kvm irqbypass crct10dif_pclmul crc32_pclmul ghash_clmulni_intel i915 aesni_intel cr ypto_simd cryptd glue_helper cec rc_core video drm_kms_helper joydev drm input_l eds i2c_algo_bit serio_raw fb_sys_fops syscopyarea sysfillrect sysimgblt mac_hid qemu_fw_cfg sch_fq_codel parport_pc ppdev lp parport ip_tables x_tables autofs4 e1000 psmouse i2c_piix4 pata_acpi floppy
[ 25.101052] CPU: 1 PID: 30 Comm: kworker/u4:1 Not tainted 5.5.0+ #1
[ 25.101053] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1 .12.1-0-ga5cab58 04/01/2014
[ 25.101055] Workqueue: events_unbound async_run_entry_fn
[ 25.101092] RIP: 0010:verify_single_dpll_state.isra.115+0x28f/0x320 [i915]
[ 25.101093] Code: e0 d9 ff e9 a3 fe ff ff 80 3d e9 c2 11 00 00 44 89 f6 48 c7 c7 c0 9d 88 c0 75 3b e8 eb df d9 ff e9 c7 fe ff ff e8 d1 e0 ae c4 <0f> 0b e9 7a fe ff ff 80 3d c0 c2 11 00 00 8d 71 41 89 c2 48 c7 c7
[ 25.101093] RSP: 0018:
ffffb1de80107878 EFLAGS:
00010286
[ 25.101094] RAX:
0000000000000000 RBX:
ffffb1de80107884 RCX:
0000000000000007
[ 25.101095] RDX:
0000000000000000 RSI:
0000000000000002 RDI:
ffff94fdfdd19740
[ 25.101095] RBP:
ffffb1de80107938 R08:
0000000d6bfdc7b4 R09:
000000000000002b
[ 25.101096] R10:
ffff94fdf82dc000 R11:
0000000000000225 R12:
00000000000001f8
[ 25.101096] R13:
ffff94fdb3ca6a90 R14:
ffff94fdb3ca0000 R15:
0000000000000000
[ 25.101097] FS:
0000000000000000(0000) GS:
ffff94fdfdd00000(0000) knlGS:00000
00000000000
[ 25.101098] CS: 0010 DS: 0000 ES: 0000 CR0:
0000000080050033
[ 25.101098] CR2:
00007fbc3e2be9c8 CR3:
000000003339a003 CR4:
0000000000360ee0
[ 25.101101] DR0:
0000000000000000 DR1:
0000000000000000 DR2:
0000000000000000
[ 25.101101] DR3:
0000000000000000 DR6:
00000000fffe0ff0 DR7:
0000000000000400
[ 25.101102] Call Trace:
[ 25.101139] intel_atomic_commit_tail+0xde4/0x1520 [i915]
[ 25.101141] ? flush_workqueue_prep_pwqs+0xfa/0x130
[ 25.101142] ? flush_workqueue+0x198/0x3c0
[ 25.101174] intel_atomic_commit+0x2ad/0x320 [i915]
[ 25.101209] drm_atomic_commit+0x4a/0x50 [drm]
[ 25.101220] drm_client_modeset_commit_atomic+0x1c4/0x200 [drm]
[ 25.101231] drm_client_modeset_commit_force+0x47/0x170 [drm]
[ 25.101250] drm_fb_helper_restore_fbdev_mode_unlocked+0x4e/0xa0 [drm_kms_hel per]
[ 25.101255] drm_fb_helper_set_par+0x2d/0x60 [drm_kms_helper]
[ 25.101287] intel_fbdev_set_par+0x1a/0x40 [i915]
[ 25.101289] ? con_is_visible+0x2e/0x60
[ 25.101290] fbcon_init+0x378/0x600
[ 25.101292] visual_init+0xd5/0x130
[ 25.101296] do_bind_con_driver+0x217/0x430
[ 25.101297] do_take_over_console+0x7d/0x1b0
[ 25.101298] do_fbcon_takeover+0x5c/0xb0
[ 25.101299] fbcon_fb_registered+0x199/0x1a0
[ 25.101301] register_framebuffer+0x22c/0x330
[ 25.101306] __drm_fb_helper_initial_config_and_unlock+0x31a/0x520 [drm_kms_h elper]
[ 25.101311] drm_fb_helper_initial_config+0x35/0x40 [drm_kms_helper]
[ 25.101341] intel_fbdev_initial_config+0x18/0x30 [i915]
[ 25.101342] async_run_entry_fn+0x3c/0x150
[ 25.101343] process_one_work+0x1fd/0x3f0
[ 25.101344] worker_thread+0x34/0x410
[ 25.101346] kthread+0x121/0x140
[ 25.101346] ? process_one_work+0x3f0/0x3f0
[ 25.101347] ? kthread_park+0x90/0x90
[ 25.101350] ret_from_fork+0x35/0x40
[ 25.101351] --[ end trace
b5b47d44cd998ba1 ]--
Fixes:
6294b61ba769 ("drm/i915/gvt: add missing display part reset for vGPU reset")
Signed-off-by: Tina Zhang <tina.zhang@intel.com>
Reviewed-by: Zhenyu Wang <zhenyuw@linux.intel.com>
Signed-off-by: Zhenyu Wang <zhenyuw@linux.intel.com>
Link: http://patchwork.freedesktop.org/patch/msgid/20200221023234.28635-1-tina.zhang@intel.com
Madhuparna Bhowmik [Sun, 23 Feb 2020 14:33:02 +0000 (20:03 +0530)]
mac80211: rx: avoid RCU list traversal under mutex
local->sta_mtx is held in __ieee80211_check_fast_rx_iface().
No need to use list_for_each_entry_rcu() as it also requires
a cond argument to avoid false lockdep warnings when not used in
RCU read-side section (with CONFIG_PROVE_RCU_LIST).
Therefore use list_for_each_entry();
Signed-off-by: Madhuparna Bhowmik <madhuparnabhowmik10@gmail.com>
Link: https://lore.kernel.org/r/20200223143302.15390-1-madhuparnabhowmik10@gmail.com
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Johannes Berg [Mon, 24 Feb 2020 08:38:15 +0000 (09:38 +0100)]
nl80211: explicitly include if_vlan.h
We use that here, and do seem to get it through some recursive
include, but better include it explicitly.
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Link: https://lore.kernel.org/r/20200224093814.1b9c258fec67.I45ac150d4e11c72eb263abec9f1f0c7add9bef2b@changeid
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Madhuparna Bhowmik [Sun, 23 Feb 2020 11:22:33 +0000 (16:52 +0530)]
net: core: devlink.c: Hold devlink->lock from the beginning of devlink_dpipe_table_register()
devlink_dpipe_table_find() should be called under either
rcu_read_lock() or devlink->lock. devlink_dpipe_table_register()
calls devlink_dpipe_table_find() without holding the lock
and acquires it later. Therefore hold the devlink->lock
from the beginning of devlink_dpipe_table_register().
Suggested-by: Jiri Pirko <jiri@mellanox.com>
Signed-off-by: Madhuparna Bhowmik <madhuparnabhowmik10@gmail.com>
Reviewed-by: Jiri Pirko <jiri@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Florian Fainelli [Thu, 20 Feb 2020 23:34:53 +0000 (15:34 -0800)]
net: phy: Avoid multiple suspends
It is currently possible for a PHY device to be suspended as part of a
network device driver's suspend call while it is still being attached to
that net_device, either via phy_suspend() or implicitly via phy_stop().
Later on, when the MDIO bus controller get suspended, we would attempt
to suspend again the PHY because it is still attached to a network
device.
This is both a waste of time and creates an opportunity for improper
clock/power management bugs to creep in.
Fixes:
803dd9c77ac3 ("net: phy: avoid suspending twice a PHY")
Signed-off-by: Florian Fainelli <f.fainelli@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Marek Vasut [Sun, 23 Feb 2020 13:38:40 +0000 (14:38 +0100)]
net: ks8851-ml: Fix IRQ handling and locking
The KS8851 requires that packet RX and TX are mutually exclusive.
Currently, the driver hopes to achieve this by disabling interrupt
from the card by writing the card registers and by disabling the
interrupt on the interrupt controller. This however is racy on SMP.
Replace this approach by expanding the spinlock used around the
ks_start_xmit() TX path to ks_irq() RX path to assure true mutual
exclusion and remove the interrupt enabling/disabling, which is
now not needed anymore. Furthermore, disable interrupts also in
ks_net_stop(), which was missing before.
Note that a massive improvement here would be to re-use the KS8851
driver approach, which is to move the TX path into a worker thread,
interrupt handling to threaded interrupt, and synchronize everything
with mutexes, but that would be a much bigger rework, for a separate
patch.
Signed-off-by: Marek Vasut <marex@denx.de>
Cc: David S. Miller <davem@davemloft.net>
Cc: Lukas Wunner <lukas@wunner.de>
Cc: Petr Stetiar <ynezz@true.cz>
Cc: YueHaibing <yuehaibing@huawei.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Jonathan Neuschäfer [Sun, 23 Feb 2020 17:46:31 +0000 (18:46 +0100)]
docs: networking: phy: Rephrase paragraph for clarity
Let's make it a little easier to read.
Signed-off-by: Jonathan Neuschäfer <j.neuschaefer@gmx.net>
Signed-off-by: David S. Miller <davem@davemloft.net>
Jens Axboe [Sun, 23 Feb 2020 06:22:19 +0000 (23:22 -0700)]
io_uring: handle multiple personalities in link chains
If we have a chain of requests and they don't all use the same
credentials, then the head of the chain will be issued with the
credentails of the tail of the chain.
Ensure __io_queue_sqe() overrides the credentials, if they are different.
Once we do that, we can clean up the creds handling as well, by only
having io_submit_sqe() do the lookup of a personality. It doesn't need
to assign it, since __io_queue_sqe() now always does the right thing.
Fixes:
75c6a03904e0 ("io_uring: support using a registered personality for commands")
Reported-by: Pavel Begunkov <asml.silence@gmail.com>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
Orson Zhai [Thu, 20 Feb 2020 17:37:04 +0000 (01:37 +0800)]
Revert "PM / devfreq: Modify the device name as devfreq(X) for sysfs"
This reverts commit
4585fbcb5331fc910b7e553ad3efd0dd7b320d14.
The name changing as devfreq(X) breaks some user space applications,
such as Android HAL from Unisoc and Hikey [1].
The device name will be changed unexpectly after every boot depending
on module init sequence. It will make trouble to setup some system
configuration like selinux for Android.
So we'd like to revert it back to old naming rule before any better
way being found.
[1] https://lkml.org/lkml/2018/5/8/1042
Cc: John Stultz <john.stultz@linaro.org>
Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Cc: stable@vger.kernel.org
Signed-off-by: Orson Zhai <orson.unisoc@gmail.com>
Acked-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Chanwoo Choi <cw00.choi@samsung.com>
Neal Cardwell [Sat, 22 Feb 2020 16:21:15 +0000 (11:21 -0500)]
tcp: fix TFO SYNACK undo to avoid double-timestamp-undo
In a rare corner case the new logic for undo of SYNACK RTO could
result in triggering the warning in tcp_fastretrans_alert() that says:
WARN_ON(tp->retrans_out != 0);
The warning looked like:
WARNING: CPU: 1 PID: 1 at net/ipv4/tcp_input.c:2818 tcp_ack+0x13e0/0x3270
The sequence that tickles this bug is:
- Fast Open server receives TFO SYN with data, sends SYNACK
- (client receives SYNACK and sends ACK, but ACK is lost)
- server app sends some data packets
- (N of the first data packets are lost)
- server receives client ACK that has a TS ECR matching first SYNACK,
and also SACKs suggesting the first N data packets were lost
- server performs TS undo of SYNACK RTO, then immediately
enters recovery
- buggy behavior then performed a *second* undo that caused
the connection to be in CA_Open with retrans_out != 0
Basically, the incoming ACK packet with SACK blocks causes us to first
undo the cwnd reduction from the SYNACK RTO, but then immediately
enters fast recovery, which then makes us eligible for undo again. And
then tcp_rcv_synrecv_state_fastopen() accidentally performs an undo
using a "mash-up" of state from two different loss recovery phases: it
uses the timestamp info from the ACK of the original SYNACK, and the
undo_marker from the fast recovery.
This fix refines the logic to only invoke the tcp_try_undo_loss()
inside tcp_rcv_synrecv_state_fastopen() if the connection is still in
CA_Loss. If peer SACKs triggered fast recovery, then
tcp_rcv_synrecv_state_fastopen() can't safely undo.
Fixes:
794200d66273 ("tcp: undo cwnd on Fast Open spurious SYNACK retransmit")
Signed-off-by: Neal Cardwell <ncardwell@google.com>
Signed-off-by: Yuchung Cheng <ycheng@google.com>
Signed-off-by: Eric Dumazet <edumazet@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Haiyang Zhang [Fri, 21 Feb 2020 16:32:18 +0000 (08:32 -0800)]
hv_netvsc: Fix unwanted wakeup in netvsc_attach()
When netvsc_attach() is called by operations like changing MTU, etc.,
an extra wakeup may happen while netvsc_attach() calling
rndis_filter_device_add() which sends rndis messages when queue is
stopped in netvsc_detach(). The completion message will wake up queue 0.
We can reproduce the issue by changing MTU etc., then the wake_queue
counter from "ethtool -S" will increase beyond stop_queue counter:
stop_queue: 0
wake_queue: 1
The issue causes queue wake up, and counter increment, no other ill
effects in current code. So we didn't see any network problem for now.
To fix this, initialize tx_disable to true, and set it to false when
the NIC is ready to be attached or registered.
Fixes:
7b2ee50c0cd5 ("hv_netvsc: common detach logic")
Signed-off-by: Haiyang Zhang <haiyangz@microsoft.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Linus Torvalds [Mon, 24 Feb 2020 00:17:42 +0000 (16:17 -0800)]
Linux 5.6-rc3
Daniele Palmas [Fri, 21 Feb 2020 13:17:05 +0000 (14:17 +0100)]
net: usb: qmi_wwan: restore mtu min/max values after raw_ip switch
usbnet creates network interfaces with min_mtu = 0 and
max_mtu = ETH_MAX_MTU.
These values are not modified by qmi_wwan when the network interface
is created initially, allowing, for example, to set mtu greater than 1500.
When a raw_ip switch is done (raw_ip set to 'Y', then set to 'N') the mtu
values for the network interface are set through ether_setup, with
min_mtu = ETH_MIN_MTU and max_mtu = ETH_DATA_LEN, not allowing anymore to
set mtu greater than 1500 (error: mtu greater than device maximum).
The patch restores the original min/max mtu values set by usbnet after a
raw_ip switch.
Signed-off-by: Daniele Palmas <dnlplm@gmail.com>
Acked-by: Bjørn Mork <bjorn@mork.no>
Signed-off-by: David S. Miller <davem@davemloft.net>
Linus Torvalds [Sun, 23 Feb 2020 17:43:50 +0000 (09:43 -0800)]
Merge tag 'for-5.6-rc2-tag' of git://git./linux/kernel/git/kdave/linux
Pull btrfs fixes from David Sterba:
"These are fixes that were found during testing with help of error
injection, plus some other stable material.
There's a fixup to patch added to rc1 causing locking in wrong context
warnings, tests found one more deadlock scenario. The patches are
tagged for stable, two of them now in the queue but we'd like all
three released at the same time.
I'm not happy about fixes to fixes in such a fast succession during
rcs, but I hope we found all the fallouts of commit
28553fa992cb
('Btrfs: fix race between shrinking truncate and fiemap')"
* tag 'for-5.6-rc2-tag' of git://git.kernel.org/pub/scm/linux/kernel/git/kdave/linux:
Btrfs: fix deadlock during fast fsync when logging prealloc extents beyond eof
Btrfs: fix btrfs_wait_ordered_range() so that it waits for all ordered extents
btrfs: fix bytes_may_use underflow in prealloc error condtition
btrfs: handle logged extent failure properly
btrfs: do not check delayed items are empty for single transaction cleanup
btrfs: reset fs_root to NULL on error in open_ctree
btrfs: destroy qgroup extent records on transaction abort
Linus Torvalds [Sun, 23 Feb 2020 17:42:19 +0000 (09:42 -0800)]
Merge tag 'ext4_for_linus_stable' of git://git./linux/kernel/git/tytso/ext4
Pull ext4 fixes from Ted Ts'o:
"More miscellaneous ext4 bug fixes (all stable fodder)"
* tag 'ext4_for_linus_stable' of git://git.kernel.org/pub/scm/linux/kernel/git/tytso/ext4:
ext4: fix mount failure with quota configured as module
jbd2: fix ocfs2 corrupt when clearing block group bits
ext4: fix race between writepages and enabling EXT4_EXTENTS_FL
ext4: rename s_journal_flag_rwsem to s_writepages_rwsem
ext4: fix potential race between s_flex_groups online resizing and access
ext4: fix potential race between s_group_info online resizing and access
ext4: fix potential race between online resizing and write operations
ext4: add cond_resched() to __ext4_find_entry()
ext4: fix a data race in EXT4_I(inode)->i_disksize
Linus Torvalds [Sun, 23 Feb 2020 17:37:41 +0000 (09:37 -0800)]
Merge tag 'csky-for-linus-5.6-rc3' of git://github.com/c-sky/csky-linux
Pull csky updates from Guo Ren:
"Sorry, I missed 5.6-rc1 merge window, but in this pull request the
most are the fixes and the rests are between fixes and features. The
only outside modification is the MAINTAINERS file update with our
mailing list.
- cache flush implementation fixes
- ftrace modify panic fix
- CONFIG_SMP boot problem fix
- fix pt_regs saving for atomic.S
- fix fixaddr_init without highmem.
- fix stack protector support
- fix fake Tightly-Coupled Memory code compile and use
- fix some typos and coding convention"
* tag 'csky-for-linus-5.6-rc3' of git://github.com/c-sky/csky-linux: (23 commits)
csky: Replace <linux/clk-provider.h> by <linux/of_clk.h>
csky: Implement copy_thread_tls
csky: Add PCI support
csky: Minimize defconfig to support buildroot config.fragment
csky: Add setup_initrd check code
csky: Cleanup old Kconfig options
arch/csky: fix some Kconfig typos
csky: Fixup compile warning for three unimplemented syscalls
csky: Remove unused cache implementation
csky: Fixup ftrace modify panic
csky: Add flush_icache_mm to defer flush icache all
csky: Optimize abiv2 copy_to_user_page with VM_EXEC
csky: Enable defer flush_dcache_page for abiv2 cpus (807/810/860)
csky: Remove unnecessary flush_icache_* implementation
csky: Support icache flush without specific instructions
csky/Kconfig: Add Kconfig.platforms to support some drivers
csky/smp: Fixup boot failed when CONFIG_SMP
csky: Set regs->usp to kernel sp, when the exception is from kernel
csky/mm: Fixup export invalid_pte_table symbol
csky: Separate fixaddr_init from highmem
...
Oliver Upton [Tue, 4 Feb 2020 23:26:31 +0000 (15:26 -0800)]
KVM: nVMX: Check IO instruction VM-exit conditions
Consult the 'unconditional IO exiting' and 'use IO bitmaps' VM-execution
controls when checking instruction interception. If the 'use IO bitmaps'
VM-execution control is 1, check the instruction access against the IO
bitmaps to determine if the instruction causes a VM-exit.
Signed-off-by: Oliver Upton <oupton@google.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Oliver Upton [Tue, 4 Feb 2020 23:26:30 +0000 (15:26 -0800)]
KVM: nVMX: Refactor IO bitmap checks into helper function
Checks against the IO bitmap are useful for both instruction emulation
and VM-exit reflection. Refactor the IO bitmap checks into a helper
function.
Signed-off-by: Oliver Upton <oupton@google.com>
Reviewed-by: Vitaly Kuznetsov <vkuznets@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Paolo Bonzini [Tue, 4 Feb 2020 23:26:29 +0000 (15:26 -0800)]
KVM: nVMX: Don't emulate instructions in guest mode
vmx_check_intercept is not yet fully implemented. To avoid emulating
instructions disallowed by the L1 hypervisor, refuse to emulate
instructions by default.
Cc: stable@vger.kernel.org
[Made commit, added commit msg - Oliver]
Signed-off-by: Oliver Upton <oupton@google.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Oliver Upton [Fri, 7 Feb 2020 10:36:07 +0000 (02:36 -0800)]
KVM: nVMX: Emulate MTF when performing instruction emulation
Since commit
5f3d45e7f282 ("kvm/x86: add support for
MONITOR_TRAP_FLAG"), KVM has allowed an L1 guest to use the monitor trap
flag processor-based execution control for its L2 guest. KVM simply
forwards any MTF VM-exits to the L1 guest, which works for normal
instruction execution.
However, when KVM needs to emulate an instruction on the behalf of an L2
guest, the monitor trap flag is not emulated. Add the necessary logic to
kvm_skip_emulated_instruction() to synthesize an MTF VM-exit to L1 upon
instruction emulation for L2.
Fixes:
5f3d45e7f282 ("kvm/x86: add support for MONITOR_TRAP_FLAG")
Signed-off-by: Oliver Upton <oupton@google.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Li RongQing [Sun, 23 Feb 2020 08:13:12 +0000 (16:13 +0800)]
KVM: fix error handling in svm_hardware_setup
rename svm_hardware_unsetup as svm_hardware_teardown, move
it before svm_hardware_setup, and call it to free all memory
if fail to setup in svm_hardware_setup, otherwise memory will
be leaked
remove __exit attribute for it since it is called in __init
function
Signed-off-by: Li RongQing <lirongqing@baidu.com>
Reviewed-by: Vitaly Kuznetsov <vkuznets@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Paolo Abeni [Fri, 21 Feb 2020 18:42:13 +0000 (19:42 +0100)]
net: genetlink: return the error code when attribute parsing fails.
Currently if attribute parsing fails and the genl family
does not support parallel operation, the error code returned
by __nlmsg_parse() is discarded by genl_family_rcv_msg_attrs_parse().
Be sure to report the error for all genl families.
Fixes:
c10e6cf85e7d ("net: genetlink: push attrbuf allocation and parsing to a separate function")
Fixes:
ab5b526da048 ("net: genetlink: always allocate separate attrs for dumpit ops")
Signed-off-by: Paolo Abeni <pabeni@redhat.com>
Reviewed-by: Jiri Pirko <jiri@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Matteo Croce [Fri, 21 Feb 2020 11:28:38 +0000 (12:28 +0100)]
ipv4: ensure rcu_read_lock() in cipso_v4_error()
Similarly to commit
c543cb4a5f07 ("ipv4: ensure rcu_read_lock() in
ipv4_link_failure()"), __ip_options_compile() must be called under rcu
protection.
Fixes:
3da1ed7ac398 ("net: avoid use IPCB in cipso_v4_error")
Suggested-by: Guillaume Nault <gnault@redhat.com>
Signed-off-by: Matteo Croce <mcroce@redhat.com>
Acked-by: Paul Moore <paul@paul-moore.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Eugenio Pérez [Fri, 21 Feb 2020 11:06:56 +0000 (12:06 +0100)]
vhost: Check docket sk_family instead of call getname
Doing so, we save one call to get data we already have in the struct.
Also, since there is no guarantee that getname use sockaddr_ll
parameter beyond its size, we add a little bit of security here.
It should do not do beyond MAX_ADDR_LEN, but syzbot found that
ax25_getname writes more (72 bytes, the size of full_sockaddr_ax25,
versus 20 + 32 bytes of sockaddr_ll + MAX_ADDR_LEN in syzbot repro).
Fixes:
3a4d5c94e9593 ("vhost_net: a kernel-level virtio server")
Reported-by: syzbot+f2a62d07a5198c819c7b@syzkaller.appspotmail.com
Signed-off-by: Eugenio Pérez <eperezma@redhat.com>
Acked-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Geert Uytterhoeven [Wed, 12 Feb 2020 10:10:58 +0000 (11:10 +0100)]
csky: Replace <linux/clk-provider.h> by <linux/of_clk.h>
The C-Sky platform code is not a clock provider, and just needs to call
of_clk_init().
Hence it can include <linux/of_clk.h> instead of <linux/clk-provider.h>.
Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
Signed-off-by: Guo Ren <guoren@linux.alibaba.com>
Linus Torvalds [Sun, 23 Feb 2020 02:02:10 +0000 (18:02 -0800)]
Merge tag 'ras-urgent-2020-02-22' of git://git./linux/kernel/git/tip/tip
Pull RAS fixes from Thomas Gleixner:
"Two fixes for the AMD MCE driver:
- Populate the per CPU MCA bank descriptor pointer only after it has
been completely set up to prevent a use-after-free in case that one
of the subsequent initialization step fails
- Implement a proper release function for the sysfs entries of MCA
threshold controls instead of freeing the memory right in the CPU
teardown code, which leads to another use-after-free when the
associated sysfs file is opened and accessed"
* tag 'ras-urgent-2020-02-22' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
x86/mce/amd: Fix kobject lifetime
x86/mce/amd: Publish the bank pointer only after setup has succeeded
Paul Moore [Sun, 23 Feb 2020 01:36:47 +0000 (20:36 -0500)]
audit: fix error handling in audit_data_to_entry()
Commit
219ca39427bf ("audit: use union for audit_field values since
they are mutually exclusive") combined a number of separate fields in
the audit_field struct into a single union. Generally this worked
just fine because they are generally mutually exclusive.
Unfortunately in audit_data_to_entry() the overlap can be a problem
when a specific error case is triggered that causes the error path
code to attempt to cleanup an audit_field struct and the cleanup
involves attempting to free a stored LSM string (the lsm_str field).
Currently the code always has a non-NULL value in the
audit_field.lsm_str field as the top of the for-loop transfers a
value into audit_field.val (both .lsm_str and .val are part of the
same union); if audit_data_to_entry() fails and the audit_field
struct is specified to contain a LSM string, but the
audit_field.lsm_str has not yet been properly set, the error handling
code will attempt to free the bogus audit_field.lsm_str value that
was set with audit_field.val at the top of the for-loop.
This patch corrects this by ensuring that the audit_field.val is only
set when needed (it is cleared when the audit_field struct is
allocated with kcalloc()). It also corrects a few other issues to
ensure that in case of error the proper error code is returned.
Cc: stable@vger.kernel.org
Fixes:
219ca39427bf ("audit: use union for audit_field values since they are mutually exclusive")
Reported-by: syzbot+1f4d90ead370d72e450b@syzkaller.appspotmail.com
Signed-off-by: Paul Moore <paul@paul-moore.com>
Linus Torvalds [Sun, 23 Feb 2020 01:25:46 +0000 (17:25 -0800)]
Merge tag 'irq-urgent-2020-02-22' of git://git./linux/kernel/git/tip/tip
Pull irq fixes from Thomas Gleixner:
"Two fixes for the irq core code which are follow ups to the recent MSI
fixes:
- The WARN_ON which was put into the MSI setaffinity callback for
paranoia reasons actually triggered via a callchain which escaped
when all the possible ways to reach that code were analyzed.
The proc/irq/$N/*affinity interfaces have a quirk which came in
when ALPHA moved to the generic interface: In case that the written
affinity mask does not contain any online CPU it calls into ALPHAs
magic auto affinity setting code.
A few years later this mechanism was also made available to x86 for
no good reasons and in a way which circumvents all sanity checks
for interrupts which cannot have their affinity set from process
context on X86 due to the way the X86 interrupt delivery works.
It would be possible to make this work properly, but there is no
point in doing so. If the interrupt is not yet started then the
affinity setting has no effect and if it is started already then it
is already assigned to an online CPU so there is no point to
randomly move it to some other CPU. Just return EINVAL as the code
has done before that change forever.
- The new MSI quirk bit in the irq domain flags turned out to be
already occupied, which escaped the author and the reviewers
because the already in use bits were 0,6,2,3,4,5 listed in that
order.
That bit 6 was simply overlooked because the ordering was straight
forward linear otherwise. So the new bit ended up being a
duplicate.
Fix it up by switching the oddball 6 to the obvious 1"
* tag 'irq-urgent-2020-02-22' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
genirq/irqdomain: Make sure all irq domain flags are distinct
genirq/proc: Reject invalid affinity masks (again)
Linus Torvalds [Sun, 23 Feb 2020 01:08:16 +0000 (17:08 -0800)]
Merge tag 'x86-urgent-2020-02-22' of git://git./linux/kernel/git/tip/tip
Pull x86 fixes from Thomas Gleixner:
"Two fixes for x86:
- Remove the __force_oder definiton from the kaslr boot code as it is
already defined in the page table code which makes GCC 10 builds
fail because it changed the default to -fno-common.
- Address the AMD erratum 1054 concerning the IRPERF capability and
enable the Instructions Retired fixed counter on machines which are
not affected by the erratum"
* tag 'x86-urgent-2020-02-22' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
x86/cpu/amd: Enable the fixed Instructions Retired counter IRPERF
x86/boot/compressed: Don't declare __force_order in kaslr_64.c
Linus Torvalds [Sat, 22 Feb 2020 19:38:20 +0000 (11:38 -0800)]
Merge tag 'zonefs-5.6-rc3' of git://git./linux/kernel/git/dlemoal/zonefs
Pull zonefs fix from Damien Le Moal:
"A single patch fixing typos in the documentation file"
* tag 'zonefs-5.6-rc3' of git://git.kernel.org/pub/scm/linux/kernel/git/dlemoal/zonefs:
zonefs: fix documentation typos etc.
Linus Torvalds [Sat, 22 Feb 2020 19:12:55 +0000 (11:12 -0800)]
Merge tag 'io_uring-5.6-2020-02-22' of git://git.kernel.dk/linux-block
Pull io_uring fixes from Jens Axboe:
"Here's a small collection of fixes that were queued up:
- Remove unnecessary NULL check (Dan)
- Missing io_req_cancelled() call in fallocate (Pavel)
- Put the cleanup check for aux data in the right spot (Pavel)
- Two fixes for SQPOLL (Stefano, Xiaoguang)"
* tag 'io_uring-5.6-2020-02-22' of git://git.kernel.dk/linux-block:
io_uring: fix __io_iopoll_check deadlock in io_sq_thread
io_uring: prevent sq_thread from spinning when it should stop
io_uring: fix use-after-free by io_cleanup_req()
io_uring: remove unnecessary NULL checks
io_uring: add missing io_req_cancelled()
Linus Torvalds [Sat, 22 Feb 2020 19:09:06 +0000 (11:09 -0800)]
Merge tag 'block-5.6-2020-02-22' of git://git.kernel.dk/linux-block
Pull block fixes from Jens Axboe:
"Just a set of NVMe fixes via Keith"
* tag 'block-5.6-2020-02-22' of git://git.kernel.dk/linux-block:
nvme-multipath: Fix memory leak with ana_log_buf
nvme: Fix uninitialized-variable warning
nvme-pci: Use single IRQ vector for old Apple models
nvme/pci: Add sleep quirk for Samsung and Toshiba drives
Linus Torvalds [Sat, 22 Feb 2020 19:00:52 +0000 (11:00 -0800)]
Merge tag 'scsi-fixes' of git://git./linux/kernel/git/jejb/scsi
Pull SCSI fixes from James Bottomley:
"Four non-core fixes.
Two are reverts of target fixes which turned out to have unwanted side
effects, one is a revert of an RDMA fix with the same problem and the
final one fixes an incorrect warning about memory allocation failures
in megaraid_sas (the driver actually reduces the allocation size until
it succeeds)"
Signed-off-by: James E.J. Bottomley <jejb@linux.ibm.com>
* tag 'scsi-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/jejb/scsi:
scsi: Revert "target: iscsi: Wait for all commands to finish before freeing a session"
scsi: Revert "RDMA/isert: Fix a recently introduced regression related to logout"
scsi: megaraid_sas: silence a warning
scsi: Revert "target/core: Inline transport_lun_remove_cmd()"
Linus Torvalds [Sat, 22 Feb 2020 18:52:54 +0000 (10:52 -0800)]
Merge tag 'hwmon-for-v5.6-rc3' of git://git./linux/kernel/git/groeck/linux-staging
Pull hwmon fixes from Guenter Roeck:
- Fix crash in w83627ehf driver seen with W83627DHG-P
- Fix lockdep splat in acpi_power_meter driver
- Fix xdpe12284 documentation Sphinx warnings
* tag 'hwmon-for-v5.6-rc3' of git://git.kernel.org/pub/scm/linux/kernel/git/groeck/linux-staging:
hwmon: (w83627ehf) Fix crash seen with W83627DHG-P
hwmon: (acpi_power_meter) Fix lockdep splat
Documentation/hwmon: fix xdpe12284 Sphinx warnings
Linus Torvalds [Sat, 22 Feb 2020 18:49:59 +0000 (10:49 -0800)]
Merge tag 'devicetree-fixes-for-5.6-2' of git://git./linux/kernel/git/robh/linux
Pull devicetree fixes deom Rob Herring:
"A handful of fixes in DT bindings for MDIO bus, Allwinner CSI, OMAP
HSMMC, and Tegra124 EMC"
* tag 'devicetree-fixes-for-5.6-2' of git://git.kernel.org/pub/scm/linux/kernel/git/robh/linux:
dt-bindings: media: csi: Fix clocks description
dt-bindings: media: csi: Add interconnects properties
dt-bindings: net: mdio: remove compatible string from example
dt-bindings: memory-controller: Update example for Tegra124 EMC
dt-bindings: mmc: omap-hsmmc: Fix SDIO interrupt
Linus Torvalds [Sat, 22 Feb 2020 18:43:41 +0000 (10:43 -0800)]
Merge tag 's390-5.6-4' of git://git./linux/kernel/git/s390/linux
Pull s390 fixes from Vasily Gorbik:
- Remove ieee_emulation_warnings sysctl which is a dead code.
- Avoid triggering rebuild of the kernel during make install.
- Enable protected virtualization guest support in default configs.
- Fix cio_ignore seq_file .next function to increase position index.
And use kobj_to_dev instead of container_of in cio code.
- Fix storage block address lists to contain absolute addresses in qdio
code.
- Few clang warnings and spelling fixes.
* tag 's390-5.6-4' of git://git.kernel.org/pub/scm/linux/kernel/git/s390/linux:
s390/qdio: fill SBALEs with absolute addresses
s390/qdio: fill SL with absolute addresses
s390: remove obsolete ieee_emulation_warnings
s390: make 'install' not depend on vmlinux
s390/kaslr: Fix casts in get_random
s390/mm: Explicitly compare PAGE_DEFAULT_KEY against zero in storage_key_init_range
s390/pkey/zcrypt: spelling s/crytp/crypt/
s390/cio: use kobj_to_dev() API
s390/defconfig: enable CONFIG_PROTECTED_VIRTUALIZATION_GUEST
s390/cio: cio_ignore_proc_seq_next should increase position index
Xiaoguang Wang [Sat, 22 Feb 2020 06:46:05 +0000 (14:46 +0800)]
io_uring: fix __io_iopoll_check deadlock in io_sq_thread
Since commit
a3a0e43fd770 ("io_uring: don't enter poll loop if we have
CQEs pending"), if we already events pending, we won't enter poll loop.
In case SETUP_IOPOLL and SETUP_SQPOLL are both enabled, if app has
been terminated and don't reap pending events which are already in cq
ring, and there are some reqs in poll_list, io_sq_thread will enter
__io_iopoll_check(), and find pending events, then return, this loop
will never have a chance to exit.
I have seen this issue in fio stress tests, to fix this issue, let
io_sq_thread call io_iopoll_getevents() with argument 'min' being zero,
and remove __io_iopoll_check().
Fixes:
a3a0e43fd770 ("io_uring: don't enter poll loop if we have CQEs pending")
Signed-off-by: Xiaoguang Wang <xiaoguang.wang@linux.alibaba.com>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
Jozsef Kadlecsik [Sat, 22 Feb 2020 11:01:43 +0000 (12:01 +0100)]
netfilter: ipset: Fix forceadd evaluation path
When the forceadd option is enabled, the hash:* types should find and replace
the first entry in the bucket with the new one if there are no reuseable
(deleted or timed out) entries. However, the position index was just not set
to zero and remained the invalid -1 if there were no reuseable entries.
Reported-by: syzbot+6a86565c74ebe30aea18@syzkaller.appspotmail.com
Fixes:
23c42a403a9c ("netfilter: ipset: Introduction of new commands and protocol version 7")
Signed-off-by: Jozsef Kadlecsik <kadlec@netfilter.org>
Jozsef Kadlecsik [Tue, 11 Feb 2020 22:20:43 +0000 (23:20 +0100)]
netfilter: ipset: Fix "INFO: rcu detected stall in hash_xxx" reports
In the case of huge hash:* types of sets, due to the single spinlock of
a set the processing of the whole set under spinlock protection could take
too long.
There were four places where the whole hash table of the set was processed
from bucket to bucket under holding the spinlock:
- During resizing a set, the original set was locked to exclude kernel side
add/del element operations (userspace add/del is excluded by the
nfnetlink mutex). The original set is actually just read during the
resize, so the spinlocking is replaced with rcu locking of regions.
However, thus there can be parallel kernel side add/del of entries.
In order not to loose those operations a backlog is added and replayed
after the successful resize.
- Garbage collection of timed out entries was also protected by the spinlock.
In order not to lock too long, region locking is introduced and a single
region is processed in one gc go. Also, the simple timer based gc running
is replaced with a workqueue based solution. The internal book-keeping
(number of elements, size of extensions) is moved to region level due to
the region locking.
- Adding elements: when the max number of the elements is reached, the gc
was called to evict the timed out entries. The new approach is that the gc
is called just for the matching region, assuming that if the region
(proportionally) seems to be full, then the whole set does. We could scan
the other regions to check every entry under rcu locking, but for huge
sets it'd mean a slowdown at adding elements.
- Listing the set header data: when the set was defined with timeout
support, the garbage collector was called to clean up timed out entries
to get the correct element numbers and set size values. Now the set is
scanned to check non-timed out entries, without actually calling the gc
for the whole set.
Thanks to Florian Westphal for helping me to solve the SOFTIRQ-safe ->
SOFTIRQ-unsafe lock order issues during working on the patch.
Reported-by: syzbot+4b0e9d4ff3cf117837e5@syzkaller.appspotmail.com
Reported-by: syzbot+c27b8d5010f45c666ed1@syzkaller.appspotmail.com
Reported-by: syzbot+68a806795ac89df3aa1c@syzkaller.appspotmail.com
Fixes:
23c42a403a9c ("netfilter: ipset: Introduction of new commands and protocol version 7")
Signed-off-by: Jozsef Kadlecsik <kadlec@netfilter.org>
Jan Kara [Fri, 21 Feb 2020 10:08:35 +0000 (11:08 +0100)]
ext4: fix mount failure with quota configured as module
When CONFIG_QFMT_V2 is configured as a module, the test in
ext4_feature_set_ok() fails and so mount of filesystems with quota or
project features fails. Fix the test to use IS_ENABLED macro which
works properly even for modules.
Link: https://lore.kernel.org/r/20200221100835.9332-1-jack@suse.cz
Fixes:
d65d87a07476 ("ext4: improve explanation of a mount failure caused by a misconfigured kernel")
Signed-off-by: Jan Kara <jack@suse.cz>
Signed-off-by: Theodore Ts'o <tytso@mit.edu>
Cc: stable@kernel.org
wangyan [Thu, 20 Feb 2020 13:46:14 +0000 (21:46 +0800)]
jbd2: fix ocfs2 corrupt when clearing block group bits
I found a NULL pointer dereference in ocfs2_block_group_clear_bits().
The running environment:
kernel version: 4.19
A cluster with two nodes, 5 luns mounted on two nodes, and do some
file operations like dd/fallocate/truncate/rm on every lun with storage
network disconnection.
The fallocate operation on dm-23-45 caused an null pointer dereference.
The information of NULL pointer dereference as follows:
[577992.878282] JBD2: Error -5 detected when updating journal superblock for dm-23-45.
[577992.878290] Aborting journal on device dm-23-45.
...
[577992.890778] JBD2: Error -5 detected when updating journal superblock for dm-24-46.
[577992.890908] __journal_remove_journal_head: freeing b_committed_data
[577992.890916] (fallocate,88392,52):ocfs2_extend_trans:474 ERROR: status = -30
[577992.890918] __journal_remove_journal_head: freeing b_committed_data
[577992.890920] (fallocate,88392,52):ocfs2_rotate_tree_right:2500 ERROR: status = -30
[577992.890922] __journal_remove_journal_head: freeing b_committed_data
[577992.890924] (fallocate,88392,52):ocfs2_do_insert_extent:4382 ERROR: status = -30
[577992.890928] (fallocate,88392,52):ocfs2_insert_extent:4842 ERROR: status = -30
[577992.890928] __journal_remove_journal_head: freeing b_committed_data
[577992.890930] (fallocate,88392,52):ocfs2_add_clusters_in_btree:4947 ERROR: status = -30
[577992.890933] __journal_remove_journal_head: freeing b_committed_data
[577992.890939] __journal_remove_journal_head: freeing b_committed_data
[577992.890949] Unable to handle kernel NULL pointer dereference at virtual address
0000000000000020
[577992.890950] Mem abort info:
[577992.890951] ESR = 0x96000004
[577992.890952] Exception class = DABT (current EL), IL = 32 bits
[577992.890952] SET = 0, FnV = 0
[577992.890953] EA = 0, S1PTW = 0
[577992.890954] Data abort info:
[577992.890955] ISV = 0, ISS = 0x00000004
[577992.890956] CM = 0, WnR = 0
[577992.890958] user pgtable: 4k pages, 48-bit VAs, pgdp =
00000000f8da07a9
[577992.890960] [
0000000000000020] pgd=
0000000000000000
[577992.890964] Internal error: Oops:
96000004 [#1] SMP
[577992.890965] Process fallocate (pid: 88392, stack limit = 0x00000000013db2fd)
[577992.890968] CPU: 52 PID: 88392 Comm: fallocate Kdump: loaded Tainted: G W OE 4.19.36 #1
[577992.890969] Hardware name: Huawei TaiShan 2280 V2/BC82AMDD, BIOS 0.98 08/25/2019
[577992.890971] pstate:
60400009 (nZCv daif +PAN -UAO)
[577992.891054] pc : _ocfs2_free_suballoc_bits+0x63c/0x968 [ocfs2]
[577992.891082] lr : _ocfs2_free_suballoc_bits+0x618/0x968 [ocfs2]
[577992.891084] sp :
ffff0000c8e2b810
[577992.891085] x29:
ffff0000c8e2b820 x28:
0000000000000000
[577992.891087] x27:
00000000000006f3 x26:
ffffa07957b02e70
[577992.891089] x25:
ffff807c59d50000 x24:
00000000000006f2
[577992.891091] x23:
0000000000000001 x22:
ffff807bd39abc30
[577992.891093] x21:
ffff0000811d9000 x20:
ffffa07535d6a000
[577992.891097] x19:
ffff000001681638 x18:
ffffffffffffffff
[577992.891098] x17:
0000000000000000 x16:
ffff000080a03df0
[577992.891100] x15:
ffff0000811d9708 x14:
203d207375746174
[577992.891101] x13:
73203a524f525245 x12:
20373439343a6565
[577992.891103] x11:
0000000000000038 x10:
0101010101010101
[577992.891106] x9 :
ffffa07c68a85d70 x8 :
7f7f7f7f7f7f7f7f
[577992.891109] x7 :
0000000000000000 x6 :
0000000000000080
[577992.891110] x5 :
0000000000000000 x4 :
0000000000000002
[577992.891112] x3 :
ffff000001713390 x2 :
2ff90f88b1c22f00
[577992.891114] x1 :
ffff807bd39abc30 x0 :
0000000000000000
[577992.891116] Call trace:
[577992.891139] _ocfs2_free_suballoc_bits+0x63c/0x968 [ocfs2]
[577992.891162] _ocfs2_free_clusters+0x100/0x290 [ocfs2]
[577992.891185] ocfs2_free_clusters+0x50/0x68 [ocfs2]
[577992.891206] ocfs2_add_clusters_in_btree+0x198/0x5e0 [ocfs2]
[577992.891227] ocfs2_add_inode_data+0x94/0xc8 [ocfs2]
[577992.891248] ocfs2_extend_allocation+0x1bc/0x7a8 [ocfs2]
[577992.891269] ocfs2_allocate_extents+0x14c/0x338 [ocfs2]
[577992.891290] __ocfs2_change_file_space+0x3f8/0x610 [ocfs2]
[577992.891309] ocfs2_fallocate+0xe4/0x128 [ocfs2]
[577992.891316] vfs_fallocate+0x11c/0x250
[577992.891317] ksys_fallocate+0x54/0x88
[577992.891319] __arm64_sys_fallocate+0x28/0x38
[577992.891323] el0_svc_common+0x78/0x130
[577992.891325] el0_svc_handler+0x38/0x78
[577992.891327] el0_svc+0x8/0xc
My analysis process as follows:
ocfs2_fallocate
__ocfs2_change_file_space
ocfs2_allocate_extents
ocfs2_extend_allocation
ocfs2_add_inode_data
ocfs2_add_clusters_in_btree
ocfs2_insert_extent
ocfs2_do_insert_extent
ocfs2_rotate_tree_right
ocfs2_extend_rotate_transaction
ocfs2_extend_trans
jbd2_journal_restart
jbd2__journal_restart
/* handle->h_transaction is NULL,
* is_handle_aborted(handle) is true
*/
handle->h_transaction = NULL;
start_this_handle
return -EROFS;
ocfs2_free_clusters
_ocfs2_free_clusters
_ocfs2_free_suballoc_bits
ocfs2_block_group_clear_bits
ocfs2_journal_access_gd
__ocfs2_journal_access
jbd2_journal_get_undo_access
/* I think jbd2_write_access_granted() will
* return true, because do_get_write_access()
* will return -EROFS.
*/
if (jbd2_write_access_granted(...)) return 0;
do_get_write_access
/* handle->h_transaction is NULL, it will
* return -EROFS here, so do_get_write_access()
* was not called.
*/
if (is_handle_aborted(handle)) return -EROFS;
/* bh2jh(group_bh) is NULL, caused NULL
pointer dereference */
undo_bg = (struct ocfs2_group_desc *)
bh2jh(group_bh)->b_committed_data;
If handle->h_transaction == NULL, then jbd2_write_access_granted()
does not really guarantee that journal_head will stay around,
not even speaking of its b_committed_data. The bh2jh(group_bh)
can be removed after ocfs2_journal_access_gd() and before call
"bh2jh(group_bh)->b_committed_data". So, we should move
is_handle_aborted() check from do_get_write_access() into
jbd2_journal_get_undo_access() and jbd2_journal_get_write_access()
before the call to jbd2_write_access_granted().
Link: https://lore.kernel.org/r/f72a623f-b3f1-381a-d91d-d22a1c83a336@huawei.com
Signed-off-by: Yan Wang <wangyan122@huawei.com>
Signed-off-by: Theodore Ts'o <tytso@mit.edu>
Reviewed-by: Jun Piao <piaojun@huawei.com>
Reviewed-by: Jan Kara <jack@suse.cz>
Cc: stable@kernel.org
Eric Biggers [Wed, 19 Feb 2020 18:30:47 +0000 (10:30 -0800)]
ext4: fix race between writepages and enabling EXT4_EXTENTS_FL
If EXT4_EXTENTS_FL is set on an inode while ext4_writepages() is running
on it, the following warning in ext4_add_complete_io() can be hit:
WARNING: CPU: 1 PID: 0 at fs/ext4/page-io.c:234 ext4_put_io_end_defer+0xf0/0x120
Here's a minimal reproducer (not 100% reliable) (root isn't required):
while true; do
sync
done &
while true; do
rm -f file
touch file
chattr -e file
echo X >> file
chattr +e file
done
The problem is that in ext4_writepages(), ext4_should_dioread_nolock()
(which only returns true on extent-based files) is checked once to set
the number of reserved journal credits, and also again later to select
the flags for ext4_map_blocks() and copy the reserved journal handle to
ext4_io_end::handle. But if EXT4_EXTENTS_FL is being concurrently set,
the first check can see dioread_nolock disabled while the later one can
see it enabled, causing the reserved handle to unexpectedly be NULL.
Since changing EXT4_EXTENTS_FL is uncommon, and there may be other races
related to doing so as well, fix this by synchronizing changing
EXT4_EXTENTS_FL with ext4_writepages() via the existing
s_writepages_rwsem (previously called s_journal_flag_rwsem).
This was originally reported by syzbot without a reproducer at
https://syzkaller.appspot.com/bug?extid=
2202a584a00fffd19fbf,
but now that dioread_nolock is the default I also started seeing this
when running syzkaller locally.
Link: https://lore.kernel.org/r/20200219183047.47417-3-ebiggers@kernel.org
Reported-by: syzbot+2202a584a00fffd19fbf@syzkaller.appspotmail.com
Fixes:
6b523df4fb5a ("ext4: use transaction reservation for extent conversion in ext4_end_io")
Signed-off-by: Eric Biggers <ebiggers@google.com>
Signed-off-by: Theodore Ts'o <tytso@mit.edu>
Reviewed-by: Jan Kara <jack@suse.cz>
Cc: stable@kernel.org
Eric Biggers [Wed, 19 Feb 2020 18:30:46 +0000 (10:30 -0800)]
ext4: rename s_journal_flag_rwsem to s_writepages_rwsem
In preparation for making s_journal_flag_rwsem synchronize
ext4_writepages() with changes to both the EXTENTS and JOURNAL_DATA
flags (rather than just JOURNAL_DATA as it does currently), rename it to
s_writepages_rwsem.
Link: https://lore.kernel.org/r/20200219183047.47417-2-ebiggers@kernel.org
Signed-off-by: Eric Biggers <ebiggers@google.com>
Signed-off-by: Theodore Ts'o <tytso@mit.edu>
Reviewed-by: Jan Kara <jack@suse.cz>
Cc: stable@kernel.org
Suraj Jitindar Singh [Wed, 19 Feb 2020 03:08:51 +0000 (19:08 -0800)]
ext4: fix potential race between s_flex_groups online resizing and access
During an online resize an array of s_flex_groups structures gets replaced
so it can get enlarged. If there is a concurrent access to the array and
this memory has been reused then this can lead to an invalid memory access.
The s_flex_group array has been converted into an array of pointers rather
than an array of structures. This is to ensure that the information
contained in the structures cannot get out of sync during a resize due to
an accessor updating the value in the old structure after it has been
copied but before the array pointer is updated. Since the structures them-
selves are no longer copied but only the pointers to them this case is
mitigated.
Link: https://bugzilla.kernel.org/show_bug.cgi?id=206443
Link: https://lore.kernel.org/r/20200221053458.730016-4-tytso@mit.edu
Signed-off-by: Suraj Jitindar Singh <surajjs@amazon.com>
Signed-off-by: Theodore Ts'o <tytso@mit.edu>
Cc: stable@kernel.org
Linus Torvalds [Sat, 22 Feb 2020 00:10:10 +0000 (16:10 -0800)]
Merge tag 'for-linus-5.6-rc3-tag' of git://git./linux/kernel/git/xen/tip
Pull xen fixes from Juergen Gross:
"Two small fixes for Xen:
- a fix to avoid warnings with new gcc
- a fix for incorrectly disabled interrupts when calling
_cond_resched()"
* tag 'for-linus-5.6-rc3-tag' of git://git.kernel.org/pub/scm/linux/kernel/git/xen/tip:
xen: Enable interrupts when calling _cond_resched()
x86/xen: Distribute switch variables for initialization
Linus Torvalds [Sat, 22 Feb 2020 00:03:36 +0000 (16:03 -0800)]
Merge tag 'arm64-fixes' of git://git./linux/kernel/git/arm64/linux
Pull arm64 fixes from Will Deacon:
"It's all straightforward apart from the changes to mmap()/mremap() in
relation to their handling of address arguments from userspace with
non-zero tag bits in the upper byte.
The change to brk() is necessary to fix a nasty user-visible
regression in malloc(), but we tightened up mmap() and mremap() at the
same time because they also allow the user to create virtual aliases
by accident. It's much less likely than brk() to matter in practice,
but enforcing the principle of "don't permit the creation of mappings
using tagged addresses" leads to a straightforward ABI without having
to worry about the "but what if a crazy program did foo?" aspect of
things.
Summary:
- Fix regression in malloc() caused by ignored address tags in brk()
- Add missing brackets around argument to untagged_addr() macro
- Fix clang build when using binutils assembler
- Fix silly typo in virtual memory map documentation"
* tag 'arm64-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux:
mm: Avoid creating virtual address aliases in brk()/mmap()/mremap()
docs: arm64: fix trivial spelling enought to enough in memory.rst
arm64: memory: Add missing brackets to untagged_addr() macro
arm64: lse: Fix LSE atomics with LLVM
Linus Torvalds [Fri, 21 Feb 2020 23:57:56 +0000 (15:57 -0800)]
Merge tag 'powerpc-5.6-3' of git://git./linux/kernel/git/powerpc/linux
Pull powerpc fixes from Michael Ellerman:
"Some more powerpc fixes for 5.6. This is two weeks worth as I was out
sick last week:
- Three fixes for the recently added VMAP_STACK on 32-bit.
- Three fixes related to hugepages on 8xx (32-bit).
- A fix for a bug in our transactional memory handling that could
lead to a kernel crash if we saw a page fault during signal
delivery.
- A fix for a deadlock in our PCI EEH (Enhanced Error Handling) code.
- A couple of other minor fixes.
Thanks to: Christophe Leroy, Erhard F, Frederic Barrat, Gustavo Luiz
Duarte, Larry Finger, Leonardo Bras, Oliver O'Halloran, Sam Bobroff"
* tag 'powerpc-5.6-3' of git://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux:
powerpc/entry: Fix an #if which should be an #ifdef in entry_32.S
powerpc/xmon: Fix whitespace handling in getstring()
powerpc/6xx: Fix power_save_ppc32_restore() with CONFIG_VMAP_STACK
powerpc/chrp: Fix enter_rtas() with CONFIG_VMAP_STACK
powerpc/32s: Fix DSI and ISI exceptions for CONFIG_VMAP_STACK
powerpc/tm: Fix clearing MSR[TS] in current when reclaiming on signal delivery
powerpc/8xx: Fix clearing of bits 20-23 in ITLB miss
powerpc/hugetlb: Fix 8M hugepages on 8xx
powerpc/hugetlb: Fix 512k hugepages on 8xx with 16k page size
powerpc/eeh: Fix deadlock handling dead PHB
Igor Druzhinin [Tue, 14 Jan 2020 14:43:19 +0000 (14:43 +0000)]
scsi: libfc: free response frame from GPN_ID
fc_disc_gpn_id_resp() should be the last function using it so free it here
to avoid memory leak.
Link: https://lore.kernel.org/r/1579013000-14570-2-git-send-email-igor.druzhinin@citrix.com
Reviewed-by: Hannes Reinecke <hare@suse.de>
Signed-off-by: Igor Druzhinin <igor.druzhinin@citrix.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Linus Torvalds [Fri, 21 Feb 2020 21:02:49 +0000 (13:02 -0800)]
Merge tag 'linux-watchdog-5.6-rc3' of git://linux-watchdog.org/linux-watchdog
Pull watchdog fixes from Wim Van Sebroeck:
- mtk_wdt needs RESET_CONTROLLER to build
- da9062 driver fixes:
- fix power management ops
- do not ping the hw during stop()
- add dependency on I2C
* tag 'linux-watchdog-5.6-rc3' of git://www.linux-watchdog.org/linux-watchdog:
watchdog: da9062: Add dependency on I2C
watchdog: da9062: fix power management ops
watchdog: da9062: do not ping the hw during stop()
watchdog: fix mtk_wdt.c RESET_CONTROLLER build error
Linus Torvalds [Fri, 21 Feb 2020 20:57:05 +0000 (12:57 -0800)]
Merge tag 'char-misc-5.6-rc3' of git://git./linux/kernel/git/gregkh/char-misc
Pull char/misc driver fixes from Greg KH:
"Here are some small char/misc driver fixes for 5.6-rc3.
Also included in here are some updates for some documentation files
that I seem to be maintaining these days.
The driver fixes are:
- small fixes for the habanalabs driver
- fsi driver bugfix
All of these have been in linux-next for a while with no reported
issues"
* tag 'char-misc-5.6-rc3' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/char-misc:
Documentation/process: Swap out the ambassador for Canonical
habanalabs: patched cb equals user cb in device memset
habanalabs: do not halt CoreSight during hard reset
habanalabs: halt the engines before hard-reset
MAINTAINERS: remove unnecessary ':' characters
fsi: aspeed: add unspecified HAS_IOMEM dependency
COPYING: state that all contributions really are covered by this file
Documentation/process: Change Microsoft contact for embargoed hardware issues
embargoed-hardware-issues: drop Amazon contact as the email address now bounces
Documentation/process: Add Arm contact for embargoed HW issues
Linus Torvalds [Fri, 21 Feb 2020 20:53:53 +0000 (12:53 -0800)]
Merge tag 'staging-5.6-rc3' of git://git./linux/kernel/git/gregkh/staging
Pull staging driver fixes from Greg KH:
"Here are some small staging driver fixes for 5.6-rc3, along with the
removal of an unused/unneeded driver as well.
The android vsoc driver is not needed anymore by anyone, so it was
removed.
The other driver fixes are:
- ashmem bugfixes
- greybus audio driver bugfix
- wireless driver bugfixes and tiny cleanups to error paths
All of these have been in linux-next for a while now with no reported
issues"
* tag 'staging-5.6-rc3' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/staging:
staging: rtl8723bs: Remove unneeded goto statements
staging: rtl8188eu: Remove some unneeded goto statements
staging: rtl8723bs: Fix potential overuse of kernel memory
staging: rtl8188eu: Fix potential overuse of kernel memory
staging: rtl8723bs: Fix potential security hole
staging: rtl8188eu: Fix potential security hole
staging: greybus: use after free in gb_audio_manager_remove_all()
staging: android: Delete the 'vsoc' driver
staging: rtl8723bs: fix copy of overlapping memory
staging: android: ashmem: Disallow ashmem memory from being remapped
staging: vt6656: fix sign of rx_dbm to bb_pre_ed_rssi.
Linus Torvalds [Fri, 21 Feb 2020 20:48:29 +0000 (12:48 -0800)]
Merge tag 'tty-5.6-rc3' of git://git./linux/kernel/git/gregkh/tty
Pull tty/serial driver fixes from Greg KH:
"Here are a number of small tty and serial driver fixes for 5.6-rc3
that resolve a bunch of reported issues.
They are:
- vt selection and ioctl fixes
- serdev bugfix
- atmel serial driver fixes
- qcom serial driver fixes
- other minor serial driver fixes
All of these have been in linux-next for a while with no reported
issues"
* tag 'tty-5.6-rc3' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/tty:
vt: selection, close sel_buffer race
vt: selection, handle pending signals in paste_selection
serial: cpm_uart: call cpm_muram_init before registering console
tty: serial: qcom_geni_serial: Fix RX cancel command failure
serial: 8250: Check UPF_IRQ_SHARED in advance
tty: serial: imx: setup the correct sg entry for tx dma
vt: vt_ioctl: fix race in VT_RESIZEX
vt: fix scrollback flushing on background consoles
tty: serial: tegra: Handle RX transfer in PIO mode if DMA wasn't started
tty/serial: atmel: manage shutdown in case of RS485 or ISO7816 mode
serdev: ttyport: restore client ops on deregistration
serial: ar933x_uart: set UART_CS_{RX,TX}_READY_ORIDE
Linus Torvalds [Fri, 21 Feb 2020 20:44:53 +0000 (12:44 -0800)]
Merge tag 'usb-5.6-rc3' of git://git./linux/kernel/git/gregkh/usb
Pull USB/Thunderbolt fixes from Greg KH:
"Here are a number of small USB driver fixes for 5.6-rc3.
Included in here are:
- MAINTAINER file updates
- USB gadget driver fixes
- usb core quirk additions and fixes for regressions
- xhci driver fixes
- usb serial driver id additions and fixes
- thunderbolt bugfix
Thunderbolt patches come in through here now that USB4 is really
thunderbolt.
All of these have been in linux-next for a while with no reported
issues"
* tag 'usb-5.6-rc3' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb: (34 commits)
USB: misc: iowarrior: add support for the 100 device
thunderbolt: Prevent crash if non-active NVMem file is read
usb: gadget: udc-xilinx: Fix xudc_stop() kernel-doc format
USB: misc: iowarrior: add support for the 28 and 28L devices
USB: misc: iowarrior: add support for 2 OEMed devices
USB: Fix novation SourceControl XL after suspend
xhci: Fix memory leak when caching protocol extended capability PSI tables - take 2
Revert "xhci: Fix memory leak when caching protocol extended capability PSI tables"
MAINTAINERS: Sort entries in database for THUNDERBOLT
usb: dwc3: debug: fix string position formatting mixup with ret and len
usb: gadget: serial: fix Tx stall after buffer overflow
usb: gadget: ffs: ffs_aio_cancel(): Save/restore IRQ flags
usb: dwc2: Fix SET/CLEAR_FEATURE and GET_STATUS flows
usb: dwc2: Fix in ISOC request length checking
usb: gadget: composite: Support more than 500mA MaxPower
usb: gadget: composite: Fix bMaxPower for SuperSpeedPlus
usb: gadget: u_audio: Fix high-speed max packet size
usb: dwc3: gadget: Check for IOC/LST bit in TRB->ctrl fields
USB: core: clean up endpoint-descriptor parsing
USB: quirks: blacklist duplicate ep on Sound Devices USBPre2
...
Linus Torvalds [Fri, 21 Feb 2020 20:18:02 +0000 (12:18 -0800)]
Merge tag 'drm-fixes-2020-02-21' of git://anongit.freedesktop.org/drm/drm
Pull drm fixes from Dave Airlie:
"Varied fixes for rc3.
i915 is the largest, they are seeing some ACPI problems with their CI
which hopefully get solved soon [1].
msm has a bunch of fixes for new hw added in the merge, a bunch of
amdgpu fixes, and nouveau adds support for some new firmwares for
turing tu11x GPUs that were just released into linux-firmware by
nvidia, they operate the same as the ones we already have for tu10x so
should be fine to hook up.
Otherwise it's just misc fixes for panfrost and sun4i.
core:
- Allow only one rotation argument, and allow zero rotation in video
cmdline.
i915:
- Workaround missing Display Stream Compression (DSC) state readout
by forcing modeset when its enabled at probe
- Fix EHL port clock voltage level requirements
- Fix queuing retire workers on the virtual engine
- Fix use of partially initialized waiters
- Stop using drm_pci_alloc/drm_pci/free
- Fix rewind of RING_TAIL by forcing a context reload
- Fix locking on resetting ring->head
- Propagate our bug filing URL change to stable kernels
panfrost:
- Small compiler warning fix for panfrost.
- Fix when using performance counters in panfrost when using per fd
address space.
sun4xi:
- Fix dt binding
nouveau:
- tu11x modesetting fix
- ACR/GR firmware support for tu11x (fw is public now)
msm:
- fix UBWC on GPU and display side for sc7180
- fix DSI suspend/resume issue encountered on sc7180
- fix some breakage on so called "linux-android" devices
(fallout from sc7180/a618 support, not seen earlier due to
bootloader/firmware differences)
- couple other misc fixes
amdgpu:
- HDCP fixes
- xclk fix for raven
- GFXOFF fixes"
[1] The Intel suspend testing should now be fixed by commit
63fb9623427f
("ACPI: PM: s2idle: Check fixed wakeup events in acpi_s2idle_wake()")
* tag 'drm-fixes-2020-02-21' of git://anongit.freedesktop.org/drm/drm: (39 commits)
drm/amdgpu/display: clean up hdcp workqueue handling
drm/amdgpu: add is_raven_kicker judgement for raven1
drm/i915/gt: Avoid resetting ring->head outside of its timeline mutex
drm/i915/execlists: Always force a context reload when rewinding RING_TAIL
drm/i915: Wean off drm_pci_alloc/drm_pci_free
drm/i915/gt: Protect defer_request() from new waiters
drm/i915/gt: Prevent queuing retire workers on the virtual engine
drm/i915/dsc: force full modeset whenever DSC is enabled at probe
drm/i915/ehl: Update port clock voltage level requirements
drm/i915: Update drm/i915 bug filing URL
MAINTAINERS: Update drm/i915 bug filing URL
drm/i915: Initialise basic fence before acquiring seqno
drm/i915/gem: Require per-engine reset support for non-persistent contexts
drm/nouveau/kms/gv100-: Re-set LUT after clearing for modesets
drm/nouveau/gr/tu11x: initial support
drm/nouveau/acr/tu11x: initial support
drm/amdgpu/gfx10: disable gfxoff when reading rlc clock
drm/amdgpu/gfx9: disable gfxoff when reading rlc clock
drm/amdgpu/soc15: fix xclk for raven
drm/amd/powerplay: always refetch the enabled features status on dpm enablement
...
Linus Torvalds [Fri, 21 Feb 2020 19:59:51 +0000 (11:59 -0800)]
Merge git://git./linux/kernel/git/netdev/net
Pull networking fixes from David Miller:
1) Limit xt_hashlimit hash table size to avoid OOM or hung tasks, from
Cong Wang.
2) Fix deadlock in xsk by publishing global consumer pointers when NAPI
is finished, from Magnus Karlsson.
3) Set table field properly to RT_TABLE_COMPAT when necessary, from
Jethro Beekman.
4) NLA_STRING attributes are not necessary NULL terminated, deal wiht
that in IFLA_ALT_IFNAME. From Eric Dumazet.
5) Fix checksum handling in atlantic driver, from Dmitry Bezrukov.
6) Handle mtu==0 devices properly in wireguard, from Jason A.
Donenfeld.
7) Fix several lockdep warnings in bonding, from Taehee Yoo.
8) Fix cls_flower port blocking, from Jason Baron.
9) Sanitize internal map names in libbpf, from Toke Høiland-Jørgensen.
10) Fix RDMA race in qede driver, from Michal Kalderon.
11) Fix several false lockdep warnings by adding conditions to
list_for_each_entry_rcu(), from Madhuparna Bhowmik.
12) Fix sleep in atomic in mlx5 driver, from Huy Nguyen.
13) Fix potential deadlock in bpf_map_do_batch(), from Yonghong Song.
14) Hey, variables declared in switch statement before any case
statements are not initialized. I learn something every day. Get
rids of this stuff in several parts of the networking, from Kees
Cook.
* git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net: (99 commits)
bnxt_en: Issue PCIe FLR in kdump kernel to cleanup pending DMAs.
bnxt_en: Improve device shutdown method.
net: netlink: cap max groups which will be considered in netlink_bind()
net: thunderx: workaround BGX TX Underflow issue
ionic: fix fw_status read
net: disable BRIDGE_NETFILTER by default
net: macb: Properly handle phylink on at91rm9200
s390/qeth: fix off-by-one in RX copybreak check
s390/qeth: don't warn for napi with 0 budget
s390/qeth: vnicc Fix EOPNOTSUPP precedence
openvswitch: Distribute switch variables for initialization
net: ip6_gre: Distribute switch variables for initialization
net: core: Distribute switch variables for initialization
udp: rehash on disconnect
net/tls: Fix to avoid gettig invalid tls record
bpf: Fix a potential deadlock with bpf_map_do_batch
bpf: Do not grab the bucket spinlock by default on htab batch ops
ice: Wait for VF to be reset/ready before configuration
ice: Don't tell the OS that link is going down
ice: Don't reject odd values of usecs set by user
...
Linus Torvalds [Fri, 21 Feb 2020 19:40:10 +0000 (11:40 -0800)]
Merge branch 'akpm' (patches from Andrew)
Merge misc fixes from Andrew Morton:
- A few y2038 fixes which missed the merge window while dependencies
in NFS were being sorted out.
- A bunch of fixes. Some minor, some not.
* emailed patches from Andrew Morton <akpm@linux-foundation.org>:
MAINTAINERS: use tabs for SAFESETID
lib/stackdepot.c: fix global out-of-bounds in stack_slabs
mm/sparsemem: pfn_to_page is not valid yet on SPARSEMEM
mm/vmscan.c: don't round up scan size for online memory cgroup
lib/string.c: update match_string() doc-strings with correct behavior
mm/memcontrol.c: lost css_put in memcg_expand_shrinker_maps()
mm/swapfile.c: fix a comment in sys_swapon()
scripts/get_maintainer.pl: deprioritize old Fixes: addresses
get_maintainer: remove uses of P: for maintainer name
selftests/vm: add missed tests in run_vmtests
include/uapi/linux/swab.h: fix userspace breakage, use __BITS_PER_LONG for swap
Revert "ipc,sem: remove uneeded sem_undo_list lock usage in exit_sem()"
y2038: hide timeval/timespec/itimerval/itimerspec types
y2038: remove unused time32 interfaces
y2038: remove ktime to/from timespec/timeval conversion
Randy Dunlap [Fri, 21 Feb 2020 04:04:33 +0000 (20:04 -0800)]
MAINTAINERS: use tabs for SAFESETID
Use tabs for indentation instead of spaces for SAFESETID. All (!) other
entries in MAINTAINERS use tabs (according to my simple grepping).
Link: http://lkml.kernel.org/r/2bb2e52a-2694-816d-57b4-6cabfadd6c1a@infradead.org
Signed-off-by: Randy Dunlap <rdunlap@infradead.org>
Cc: Micah Morton <mortonm@chromium.org>
Cc: James Morris <jmorris@namei.org>
Cc: "Serge E. Hallyn" <serge@hallyn.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Alexander Potapenko [Fri, 21 Feb 2020 04:04:30 +0000 (20:04 -0800)]
lib/stackdepot.c: fix global out-of-bounds in stack_slabs
Walter Wu has reported a potential case in which init_stack_slab() is
called after stack_slabs[STACK_ALLOC_MAX_SLABS - 1] has already been
initialized. In that case init_stack_slab() will overwrite
stack_slabs[STACK_ALLOC_MAX_SLABS], which may result in a memory
corruption.
Link: http://lkml.kernel.org/r/20200218102950.260263-1-glider@google.com
Fixes:
cd11016e5f521 ("mm, kasan: stackdepot implementation. Enable stackdepot for SLAB")
Signed-off-by: Alexander Potapenko <glider@google.com>
Reported-by: Walter Wu <walter-zh.wu@mediatek.com>
Cc: Dmitry Vyukov <dvyukov@google.com>
Cc: Matthias Brugger <matthias.bgg@gmail.com>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Josh Poimboeuf <jpoimboe@redhat.com>
Cc: Kate Stewart <kstewart@linuxfoundation.org>
Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Cc: <stable@vger.kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Wei Yang [Fri, 21 Feb 2020 04:04:27 +0000 (20:04 -0800)]
mm/sparsemem: pfn_to_page is not valid yet on SPARSEMEM
When we use SPARSEMEM instead of SPARSEMEM_VMEMMAP, pfn_to_page()
doesn't work before sparse_init_one_section() is called.
This leads to a crash when hotplug memory:
BUG: unable to handle page fault for address:
0000000006400000
#PF: supervisor write access in kernel mode
#PF: error_code(0x0002) - not-present page
PGD 0 P4D 0
Oops: 0002 [#1] SMP PTI
CPU: 3 PID: 221 Comm: kworker/u16:1 Tainted: G W 5.5.0-next-
20200205+ #343
Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 0.0.0 02/06/2015
Workqueue: kacpi_hotplug acpi_hotplug_work_fn
RIP: 0010:__memset+0x24/0x30
Code: cc cc cc cc cc cc 0f 1f 44 00 00 49 89 f9 48 89 d1 83 e2 07 48 c1 e9 03 40 0f b6 f6 48 b8 01 01 01 01 01 01 01 01 48 0f af c6 <f3> 48 ab 89 d1 f3 aa 4c 89 c8 c3 90 49 89 f9 40 88 f0 48 89 d1 f3
RSP: 0018:
ffffb43ac0373c80 EFLAGS:
00010a87
RAX:
ffffffffffffffff RBX:
ffff8a1518800000 RCX:
0000000000050000
RDX:
0000000000000000 RSI:
00000000000000ff RDI:
0000000006400000
RBP:
0000000000140000 R08:
0000000000100000 R09:
0000000006400000
R10:
0000000000000000 R11:
0000000000000002 R12:
0000000000000000
R13:
0000000000000028 R14:
0000000000000000 R15:
ffff8a153ffd9280
FS:
0000000000000000(0000) GS:
ffff8a153ab00000(0000) knlGS:
0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0:
0000000080050033
CR2:
0000000006400000 CR3:
0000000136fca000 CR4:
00000000000006e0
DR0:
0000000000000000 DR1:
0000000000000000 DR2:
0000000000000000
DR3:
0000000000000000 DR6:
00000000fffe0ff0 DR7:
0000000000000400
Call Trace:
sparse_add_section+0x1c9/0x26a
__add_pages+0xbf/0x150
add_pages+0x12/0x60
add_memory_resource+0xc8/0x210
__add_memory+0x62/0xb0
acpi_memory_device_add+0x13f/0x300
acpi_bus_attach+0xf6/0x200
acpi_bus_scan+0x43/0x90
acpi_device_hotplug+0x275/0x3d0
acpi_hotplug_work_fn+0x1a/0x30
process_one_work+0x1a7/0x370
worker_thread+0x30/0x380
kthread+0x112/0x130
ret_from_fork+0x35/0x40
We should use memmap as it did.
On x86 the impact is limited to x86_32 builds, or x86_64 configurations
that override the default setting for SPARSEMEM_VMEMMAP.
Other memory hotplug archs (arm64, ia64, and ppc) also default to
SPARSEMEM_VMEMMAP=y.
[dan.j.williams@intel.com: changelog update]
{rppt@linux.ibm.com: changelog update]
Link: http://lkml.kernel.org/r/20200219030454.4844-1-bhe@redhat.com
Fixes:
ba72b4c8cf60 ("mm/sparsemem: support sub-section hotplug")
Signed-off-by: Wei Yang <richardw.yang@linux.intel.com>
Signed-off-by: Baoquan He <bhe@redhat.com>
Acked-by: David Hildenbrand <david@redhat.com>
Reviewed-by: Baoquan He <bhe@redhat.com>
Reviewed-by: Dan Williams <dan.j.williams@intel.com>
Acked-by: Michal Hocko <mhocko@suse.com>
Cc: Mike Rapoport <rppt@linux.ibm.com>
Cc: Oscar Salvador <osalvador@suse.de>
Cc: <stable@vger.kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Gavin Shan [Fri, 21 Feb 2020 04:04:24 +0000 (20:04 -0800)]
mm/vmscan.c: don't round up scan size for online memory cgroup
Commit
68600f623d69 ("mm: don't miss the last page because of round-off
error") makes the scan size round up to @denominator regardless of the
memory cgroup's state, online or offline. This affects the overall
reclaiming behavior: the corresponding LRU list is eligible for
reclaiming only when its size logically right shifted by @sc->priority
is bigger than zero in the former formula.
For example, the inactive anonymous LRU list should have at least 0x4000
pages to be eligible for reclaiming when we have 60/12 for
swappiness/priority and without taking scan/rotation ratio into account.
After the roundup is applied, the inactive anonymous LRU list becomes
eligible for reclaiming when its size is bigger than or equal to 0x1000
in the same condition.
(0x4000 >> 12) * 60 / (60 + 140 + 1) = 1
((0x1000 >> 12) * 60) + 200) / (60 + 140 + 1) = 1
aarch64 has 512MB huge page size when the base page size is 64KB. The
memory cgroup that has a huge page is always eligible for reclaiming in
that case.
The reclaiming is likely to stop after the huge page is reclaimed,
meaing the further iteration on @sc->priority and the silbing and child
memory cgroups will be skipped. The overall behaviour has been changed.
This fixes the issue by applying the roundup to offlined memory cgroups
only, to give more preference to reclaim memory from offlined memory
cgroup. It sounds reasonable as those memory is unlikedly to be used by
anyone.
The issue was found by starting up 8 VMs on a Ampere Mustang machine,
which has 8 CPUs and 16 GB memory. Each VM is given with 2 vCPUs and
2GB memory. It took 264 seconds for all VMs to be completely up and
784MB swap is consumed after that. With this patch applied, it took 236
seconds and 60MB swap to do same thing. So there is 10% performance
improvement for my case. Note that KSM is disable while THP is enabled
in the testing.
total used free shared buff/cache available
Mem: 16196 10065 2049 16 4081 3749
Swap: 8175 784 7391
total used free shared buff/cache available
Mem: 16196 11324 3656 24 1215 2936
Swap: 8175 60 8115
Link: http://lkml.kernel.org/r/20200211024514.8730-1-gshan@redhat.com
Fixes:
68600f623d69 ("mm: don't miss the last page because of round-off error")
Signed-off-by: Gavin Shan <gshan@redhat.com>
Acked-by: Roman Gushchin <guro@fb.com>
Cc: <stable@vger.kernel.org> [4.20+]
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Alexandru Ardelean [Fri, 21 Feb 2020 04:04:21 +0000 (20:04 -0800)]
lib/string.c: update match_string() doc-strings with correct behavior
There were a few attempts at changing behavior of the match_string()
helpers (i.e. 'match_string()' & 'sysfs_match_string()'), to change &
extend the behavior according to the doc-string.
But the simplest approach is to just fix the doc-strings. The current
behavior is fine as-is, and some bugs were introduced trying to fix it.
As for extending the behavior, new helpers can always be introduced if
needed.
The match_string() helpers behave more like 'strncmp()' in the sense
that they go up to n elements or until the first NULL element in the
array of strings.
This change updates the doc-strings with this info.
Link: http://lkml.kernel.org/r/20200213072722.8249-1-alexandru.ardelean@analog.com
Signed-off-by: Alexandru Ardelean <alexandru.ardelean@analog.com>
Acked-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Cc: Kees Cook <keescook@chromium.org>
Cc: "Tobin C . Harding" <tobin@kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Vasily Averin [Fri, 21 Feb 2020 04:04:18 +0000 (20:04 -0800)]
mm/memcontrol.c: lost css_put in memcg_expand_shrinker_maps()
for_each_mem_cgroup() increases css reference counter for memory cgroup
and requires to use mem_cgroup_iter_break() if the walk is cancelled.
Link: http://lkml.kernel.org/r/c98414fb-7e1f-da0f-867a-9340ec4bd30b@virtuozzo.com
Fixes:
0a4465d34028 ("mm, memcg: assign memcg-aware shrinkers bitmap to memcg")
Signed-off-by: Vasily Averin <vvs@virtuozzo.com>
Acked-by: Kirill Tkhai <ktkhai@virtuozzo.com>
Acked-by: Michal Hocko <mhocko@suse.com>
Reviewed-by: Roman Gushchin <guro@fb.com>
Cc: Johannes Weiner <hannes@cmpxchg.org>
Cc: Vladimir Davydov <vdavydov.dev@gmail.com>
Cc: <stable@vger.kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Christoph Hellwig [Fri, 21 Feb 2020 04:04:15 +0000 (20:04 -0800)]
mm/swapfile.c: fix a comment in sys_swapon()
claim_swapfile now always takes i_rwsem.
Link: http://lkml.kernel.org/r/20200114161225.309792-2-hch@lst.de
Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Douglas Anderson [Fri, 21 Feb 2020 04:04:12 +0000 (20:04 -0800)]
scripts/get_maintainer.pl: deprioritize old Fixes: addresses
Recently, I found that get_maintainer was causing me to send emails to
the old addresses for maintainers. Since I usually just trust the
output of get_maintainer to know the right email address, I didn't even
look carefully and fired off two patch series that went to the wrong
place. Oops.
The problem was introduced recently when trying to add signatures from
Fixes. The problem was that these email addresses were added too early
in the process of compiling our list of places to send. Things added to
the list earlier are considered more canonical and when we later added
maintainer entries we ended up deduplicating to the old address.
Here are two examples using mainline commits (to make it easier to
replicate) for the two maintainers that I messed up recently:
$ git format-patch
d8549bcd0529~..
d8549bcd0529
$ ./scripts/get_maintainer.pl 0001-clk-Add-clk_hw*.patch | grep Boyd
Stephen Boyd <sboyd@codeaurora.org>...
$ git format-patch
6d1238aa3395~..
6d1238aa3395
$ ./scripts/get_maintainer.pl 0001-arm64-dts-qcom-qcs404*.patch | grep Andy
Andy Gross <andy.gross@linaro.org>
Let's move the adding of addresses from Fixes: to the end since the
email addresses from these are much more likely to be older.
After this patch the above examples get the right addresses for the two
examples.
Link: http://lkml.kernel.org/r/20200127095001.1.I41fba9f33590bfd92cd01960161d8384268c6569@changeid
Fixes:
2f5bd343694e ("scripts/get_maintainer.pl: add signatures from Fixes: <badcommit> lines in commit message")
Signed-off-by: Douglas Anderson <dianders@chromium.org>
Acked-by: Joe Perches <joe@perches.com>
Cc: Stephen Boyd <sboyd@kernel.org>
Cc: Bjorn Andersson <bjorn.andersson@linaro.org>
Cc: Andy Gross <agross@kernel.org>
Cc: Kees Cook <keescook@chromium.org>
Cc: Dan Carpenter <dan.carpenter@oracle.com>
Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Joe Perches [Fri, 21 Feb 2020 04:04:09 +0000 (20:04 -0800)]
get_maintainer: remove uses of P: for maintainer name
Commit
1ca84ed6425f ("MAINTAINERS: Reclaim the P: tag for Maintainer
Entry Profile") changed the use of the "P:" tag from "Person" to
"Profile (ie: special subsystem coding styles and characteristics)"
Change how get_maintainer.pl parses the "P:" tag to match.
Link: http://lkml.kernel.org/r/ca53823fc5d25c0be32ad937d0207a0589c08643.camel@perches.com
Signed-off-by: Joe Perches <joe@perches.com>
Acked-by: Dan Williams <dan.j.william@intel.com>
Cc: Jonathan Corbet <corbet@lwn.net>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
SeongJae Park [Fri, 21 Feb 2020 04:04:06 +0000 (20:04 -0800)]
selftests/vm: add missed tests in run_vmtests
The commits introducing 'mlock-random-test'[1], 'map_fiex_noreplace'[2],
and 'thuge-gen'[3] have not added those in the 'run_vmtests' script and
thus the 'run_tests' command of kselftests doesn't run those. This
commit adds those in the script.
'gup_benchmark' and 'transhuge-stress' are also not included in the
'run_vmtests', but this commit does not add those because those are for
performance measurement rather than pass/fail tests.
[1] commit
26b4224d9961 ("selftests: expanding more mlock selftest")
[2] commit
91cbacc34512 ("tools/testing/selftests/vm/map_fixed_noreplace.c: add test for MAP_FIXED_NOREPLACE")
[3] commit
fcc1f2d5dd34 ("selftests: add a test program for variable huge page sizes in mmap/shmget")
Link: http://lkml.kernel.org/r/20200206085144.29126-1-sj38.park@gmail.com
Signed-off-by: SeongJae Park <sjpark@amazon.de>
Cc: Uladzislau Rezki (Sony) <urezki@gmail.com>
Cc: Masami Hiramatsu <mhiramat@kernel.org>
Cc: Shuah Khan <shuah@kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Christian Borntraeger [Fri, 21 Feb 2020 04:04:03 +0000 (20:04 -0800)]
include/uapi/linux/swab.h: fix userspace breakage, use __BITS_PER_LONG for swap
QEMU has a funny new build error message when I use the upstream kernel
headers:
CC block/file-posix.o
In file included from /home/cborntra/REPOS/qemu/include/qemu/timer.h:4,
from /home/cborntra/REPOS/qemu/include/qemu/timed-average.h:29,
from /home/cborntra/REPOS/qemu/include/block/accounting.h:28,
from /home/cborntra/REPOS/qemu/include/block/block_int.h:27,
from /home/cborntra/REPOS/qemu/block/file-posix.c:30:
/usr/include/linux/swab.h: In function `__swab':
/home/cborntra/REPOS/qemu/include/qemu/bitops.h:20:34: error: "sizeof" is not defined, evaluates to 0 [-Werror=undef]
20 | #define BITS_PER_LONG (sizeof (unsigned long) * BITS_PER_BYTE)
| ^~~~~~
/home/cborntra/REPOS/qemu/include/qemu/bitops.h:20:41: error: missing binary operator before token "("
20 | #define BITS_PER_LONG (sizeof (unsigned long) * BITS_PER_BYTE)
| ^
cc1: all warnings being treated as errors
make: *** [/home/cborntra/REPOS/qemu/rules.mak:69: block/file-posix.o] Error 1
rm tests/qemu-iotests/socket_scm_helper.o
This was triggered by commit
d5767057c9a ("uapi: rename ext2_swab() to
swab() and share globally in swab.h"). That patch is doing
#include <asm/bitsperlong.h>
but it uses BITS_PER_LONG.
The kernel file asm/bitsperlong.h provide only __BITS_PER_LONG.
Let us use the __ variant in swap.h
Link: http://lkml.kernel.org/r/20200213142147.17604-1-borntraeger@de.ibm.com
Fixes:
d5767057c9a ("uapi: rename ext2_swab() to swab() and share globally in swab.h")
Signed-off-by: Christian Borntraeger <borntraeger@de.ibm.com>
Cc: Yury Norov <yury.norov@gmail.com>
Cc: Allison Randal <allison@lohutok.net>
Cc: Joe Perches <joe@perches.com>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: William Breathitt Gray <vilhelm.gray@gmail.com>
Cc: Torsten Hilbrich <torsten.hilbrich@secunet.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Ioanna Alifieraki [Fri, 21 Feb 2020 04:04:00 +0000 (20:04 -0800)]
Revert "ipc,sem: remove uneeded sem_undo_list lock usage in exit_sem()"
This reverts commit
a97955844807e327df11aa33869009d14d6b7de0.
Commit
a97955844807 ("ipc,sem: remove uneeded sem_undo_list lock usage
in exit_sem()") removes a lock that is needed. This leads to a process
looping infinitely in exit_sem() and can also lead to a crash. There is
a reproducer available in [1] and with the commit reverted the issue
does not reproduce anymore.
Using the reproducer found in [1] is fairly easy to reach a point where
one of the child processes is looping infinitely in exit_sem between
for(;;) and if (semid == -1) block, while it's trying to free its last
sem_undo structure which has already been freed by freeary().
Each sem_undo struct is on two lists: one per semaphore set (list_id)
and one per process (list_proc). The list_id list tracks undos by
semaphore set, and the list_proc by process.
Undo structures are removed either by freeary() or by exit_sem(). The
freeary function is invoked when the user invokes a syscall to remove a
semaphore set. During this operation freeary() traverses the list_id
associated with the semaphore set and removes the undo structures from
both the list_id and list_proc lists.
For this case, exit_sem() is called at process exit. Each process
contains a struct sem_undo_list (referred to as "ulp") which contains
the head for the list_proc list. When the process exits, exit_sem()
traverses this list to remove each sem_undo struct. As in freeary(),
whenever a sem_undo struct is removed from list_proc, it is also removed
from the list_id list.
Removing elements from list_id is safe for both exit_sem() and freeary()
due to sem_lock(). Removing elements from list_proc is not safe;
freeary() locks &un->ulp->lock when it performs
list_del_rcu(&un->list_proc) but exit_sem() does not (locking was
removed by commit
a97955844807 ("ipc,sem: remove uneeded sem_undo_list
lock usage in exit_sem()").
This can result in the following situation while executing the
reproducer [1] : Consider a child process in exit_sem() and the parent
in freeary() (because of semctl(sid[i], NSEM, IPC_RMID)).
- The list_proc for the child contains the last two undo structs A and
B (the rest have been removed either by exit_sem() or freeary()).
- The semid for A is 1 and semid for B is 2.
- exit_sem() removes A and at the same time freeary() removes B.
- Since A and B have different semid sem_lock() will acquire different
locks for each process and both can proceed.
The bug is that they remove A and B from the same list_proc at the same
time because only freeary() acquires the ulp lock. When exit_sem()
removes A it makes ulp->list_proc.next to point at B and at the same
time freeary() removes B setting B->semid=-1.
At the next iteration of for(;;) loop exit_sem() will try to remove B.
The only way to break from for(;;) is for (&un->list_proc ==
&ulp->list_proc) to be true which is not. Then exit_sem() will check if
B->semid=-1 which is and will continue looping in for(;;) until the
memory for B is reallocated and the value at B->semid is changed.
At that point, exit_sem() will crash attempting to unlink B from the
lists (this can be easily triggered by running the reproducer [1] a
second time).
To prove this scenario instrumentation was added to keep information
about each sem_undo (un) struct that is removed per process and per
semaphore set (sma).
CPU0 CPU1
[caller holds sem_lock(sma for A)] ...
freeary() exit_sem()
... ...
... sem_lock(sma for B)
spin_lock(A->ulp->lock) ...
list_del_rcu(un_A->list_proc) list_del_rcu(un_B->list_proc)
Undo structures A and B have different semid and sem_lock() operations
proceed. However they belong to the same list_proc list and they are
removed at the same time. This results into ulp->list_proc.next
pointing to the address of B which is already removed.
After reverting commit
a97955844807 ("ipc,sem: remove uneeded
sem_undo_list lock usage in exit_sem()") the issue was no longer
reproducible.
[1] https://bugzilla.redhat.com/show_bug.cgi?id=1694779
Link: http://lkml.kernel.org/r/20191211191318.11860-1-ioanna-maria.alifieraki@canonical.com
Fixes:
a97955844807 ("ipc,sem: remove uneeded sem_undo_list lock usage in exit_sem()")
Signed-off-by: Ioanna Alifieraki <ioanna-maria.alifieraki@canonical.com>
Acked-by: Manfred Spraul <manfred@colorfullife.com>
Acked-by: Herton R. Krzesinski <herton@redhat.com>
Cc: Arnd Bergmann <arnd@arndb.de>
Cc: Catalin Marinas <catalin.marinas@arm.com>
Cc: <malat@debian.org>
Cc: Joel Fernandes (Google) <joel@joelfernandes.org>
Cc: Davidlohr Bueso <dave@stgolabs.net>
Cc: Jay Vosburgh <jay.vosburgh@canonical.com>
Cc: <stable@vger.kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Arnd Bergmann [Fri, 21 Feb 2020 04:03:57 +0000 (20:03 -0800)]
y2038: hide timeval/timespec/itimerval/itimerspec types
There are no in-kernel users remaining, but there may still be users that
include linux/time.h instead of sys/time.h from user space, so leave the
types available to user space while hiding them from kernel space.
Only the __kernel_old_* versions of these types remain now.
Link: http://lkml.kernel.org/r/20200110154232.4104492-4-arnd@arndb.de
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Acked-by: Thomas Gleixner <tglx@linutronix.de>
Cc: Deepa Dinamani <deepa.kernel@gmail.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Arnd Bergmann [Fri, 21 Feb 2020 04:03:54 +0000 (20:03 -0800)]
y2038: remove unused time32 interfaces
No users remain, so kill these off before we grow new ones.
Link: http://lkml.kernel.org/r/20200110154232.4104492-3-arnd@arndb.de
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Acked-by: Thomas Gleixner <tglx@linutronix.de>
Cc: Deepa Dinamani <deepa.kernel@gmail.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>