Pull arm64 fixes from Will Deacon:
"Two KVM/arm fixes for MMIO emulation and UBSAN.
Unusually, we're routing them via the arm64 tree as per Paolo's
request on the list:
https://lore.kernel.org/kvm/21ae69a2-2546-29d0-bff6-2ea825e3d968@redhat.com/
We don't actually have any other arm64 fixes pending at the moment
(touch wood), so I've pulled from Marc, written a merge commit, tagged
the result and run it through my build/boot/bisect scripts"
* tag 'arm64-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux:
KVM: arm/arm64: VGIC: Properly initialise private IRQ affinity
KVM: arm/arm64: Only skip MMIO insn once
Pull SCSI fixes from James Bottomley:
"Four fixes, three for edge conditions which don't occur very often.
The lpfc fix mitigates memory exhaustion for some high CPU systems"
* tag 'scsi-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/jejb/scsi:
scsi: lpfc: Mitigate high memory pre-allocation by SCSI-MQ
scsi: ufs: Fix NULL pointer dereference in ufshcd_config_vreg_hpm()
scsi: target: tcmu: avoid use-after-free after command timeout
scsi: qla2xxx: Fix gnl.l memory leak on adapter init failure
Pull xfs fix from Darrick Wong:
"A single patch that fixes a xfs lockup problem when a chown/chgrp
operation fails due to running out of quota. It has survived the usual
xfstests runs and merges cleanly with this morning's master:
- Fix a forgotten inode unlock when chown/chgrp fail due to quota"
* tag 'xfs-5.3-fixes-6' of git://git.kernel.org/pub/scm/fs/xfs/xfs-linux:
xfs: fix missing ILOCK unlock when xfs_setattr_nonsize fails due to EDQUOT
Pull more drm fixes from Dave Airlie:
"Although the tree built for me fine on arm here, it appears either
header cleanups in next or some kconfig combo it breaks, so this
contains a fix to mediatek to include dma-mapping.h explicitly.
There was also one nouveau fix that came in late that I was going to
leave until next week, but since I was sending this I thought it may
as well be in here:
mediatek:
- fix build in some cases
nouveau:
- fix hang with i2c and mst docks"
* tag 'drm-fixes-2019-08-24' of git://anongit.freedesktop.org/drm/drm:
drm/mediatek: include dma-mapping header
drm/nouveau: Don't retry infinitely when receiving no data on i2c over AUX
Pull KVM/arm fixes from Marc Zyngier as per Paulo's request at:
https://lkml.kernel.org/r/21ae69a2-2546-29d0-bff6-2ea825e3d968@redhat.com
"One (hopefully last) set of fixes for KVM/arm for 5.3: an embarassing
MMIO emulation regression, and a UBSAN splat. Oh well...
- Don't overskip instructions on MMIO emulation
- Fix UBSAN splat when initializing PPI priorities"
* tag 'kvmarm-fixes-for-5.3-3' of git://git.kernel.org/pub/scm/linux/kernel/git/kvmarm/kvmarm:
KVM: arm/arm64: VGIC: Properly initialise private IRQ affinity
KVM: arm/arm64: Only skip MMIO insn once
Although it builds fine here in my arm cross compile, it seems
either via some other patches in -next or some Kconfig combination,
this fails to build for everyone.
Include linux/dma-mapping.h should fix it.
Signed-off-by: Dave Airlie <airlied@redhat.com>
Pull rdma fixes from Doug Ledford:
"No beating around the bush: this is a monster pull request for an -rc5
kernel. Intel hit me with a series of fixes for TID processing.
Mellanox hit me with a series for their UMR memory support.
And we had one fix for siw that fixes the 32bit build warnings and
because of the number of casts that had to be changed to properly
silence the warnings, that one patch alone is a full 40% of the LOC of
this entire pull request. Given that this is the initial release
kernel for siw, I'm trying to fix anything in it that we can, so that
adds to the impetus to take fixes for it like this one.
I had to do a rebase early in the week. Jason had thought he put a
patch on the rc queue that he needed to be there so he could base some
work off of it, and it had actually not been placed there. So he asked
me (on Tuesday) to fix that up before pushing my wip branch to the
official rc branch. I did, and that's why the early patches look like
they were all committed at the same time on Tuesday. That bunch had
been in my queue prior.
The various patches all pass my test for being legitimate fixes and
not attempts to slide new features or development into a late rc.
Well, they were all fixes with the exception of a couple clean up
patches people wrote for making the fixes they also wrote better (like
a cleanup patch to move UMR checking into a function so that the
remaining UMR fix patches can reference that function), so I left
those in place too.
My apologies for the LOC count and the number of patches here, it's
just how the cards fell this cycle.
Summary:
- Fix siw buffer mapping issue
- Fix siw 32/64 casting issues
- Fix a KASAN access issue in bnxt_re
- Fix several memory leaks (hfi1, mlx4)
- Fix a NULL deref in cma_cleanup
- Fixes for UMR memory support in mlx5 (4 patch series)
- Fix namespace check for restrack
- Fixes for counter support
- Fixes for hfi1 TID processing (5 patch series)
- Fix potential NULL deref in siw
- Fix memory page calculations in mlx5"
* tag 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/rdma/rdma: (21 commits)
RDMA/siw: Fix 64/32bit pointer inconsistency
RDMA/siw: Fix SGL mapping issues
RDMA/bnxt_re: Fix stack-out-of-bounds in bnxt_qplib_rcfw_send_message
infiniband: hfi1: fix memory leaks
infiniband: hfi1: fix a memory leak bug
IB/mlx4: Fix memory leaks
RDMA/cma: fix null-ptr-deref Read in cma_cleanup
IB/mlx5: Block MR WR if UMR is not possible
IB/mlx5: Fix MR re-registration flow to use UMR properly
IB/mlx5: Report and handle ODP support properly
IB/mlx5: Consolidate use_umr checks into single function
RDMA/restrack: Rewrite PID namespace check to be reliable
RDMA/counters: Properly implement PID checks
IB/core: Fix NULL pointer dereference when bind QP to counter
IB/hfi1: Drop stale TID RDMA packets that cause TIDErr
IB/hfi1: Add additional checks when handling TID RDMA WRITE DATA packet
IB/hfi1: Add additional checks when handling TID RDMA READ RESP packet
IB/hfi1: Unsafe PSN checking for TID RDMA READ Resp packet
IB/hfi1: Drop stale TID RDMA packets
RDMA/siw: Fix potential NULL de-ref
...
Pull block fixes from Jens Axboe:
"Here's a set of fixes that should go into this release. This contains:
- Three minor fixes for NVMe.
- Three minor tweaks for the io_uring polling logic.
- Officially mark Song as the MD maintainer, after he's been filling
that role sucessfully for the last 6 months or so"
* tag 'for-linus-20190823' of git://git.kernel.dk/linux-block:
io_uring: add need_resched() check in inner poll loop
md: update MAINTAINERS info
io_uring: don't enter poll loop if we have CQEs pending
nvme: Add quirk for LiteON CL1 devices running FW 22301111
nvme: Fix cntlid validation when not using NVMEoF
nvme-multipath: fix possible I/O hang when paths are updated
io_uring: fix potential hang with polled IO
Pull device mapper fixes from Mike Snitzer:
- Revert a DM bufio change from during the 5.3 merge window now that a
proper fix has been made to the block loopback driver.
- Fix DM kcopyd to wakeup so failed subjobs get completed.
- Various fixes to DM zoned target to address error handling, and other
small tweaks (SPDX license identifiers and fix typos).
- Fix DM integrity range locking race by tracking whether journal has
changed.
- Fix DM dust target to detect reads of badblocks beyond the first 512b
sector (applicable if blocksize is larger than 512b).
- Fix DM persistent-data issue in both the DM btree and DM
space-map-metadata interfaces.
- Fix out of bounds memory access with certain DM table configurations.
* tag 'for-5.3/dm-fixes-2' of git://git.kernel.org/pub/scm/linux/kernel/git/device-mapper/linux-dm:
dm table: fix invalid memory accesses with too high sector number
dm space map metadata: fix missing store of apply_bops() return value
dm btree: fix order of block initialization in btree_split_beneath
dm raid: add missing cleanup in raid_ctr()
dm zoned: fix potential NULL dereference in dmz_do_reclaim()
dm dust: use dust block size for badblocklist index
dm integrity: fix a crash due to BUG_ON in __journal_read_write()
dm zoned: fix a few typos
dm zoned: add SPDX license identifiers
dm zoned: properly handle backing device failure
dm zoned: improve error handling in i/o map code
dm zoned: improve error handling in reclaim
dm kcopyd: always complete failed jobs
Revert "dm bufio: fix deadlock with loop device"
Pull xfs fixes from Darrick Wong:
"Here are a few more bug fixes that trickled in since the last pull.
They've survived the usual xfstests runs and merge cleanly with this
morning's master.
I expect there to be one more pull request tomorrow for the fix to
that quota related inode unlock bug that we were reviewing last night,
but it will continue to soak in the testing machine for several more
hours.
- Fix missing compat ioctl handling for get/setlabel
- Fix missing ioctl pointer sanitization on s390
- Fix a page locking deadlock in the dedupe comparison code
- Fix inadequate locking in reflink code w.r.t. concurrent directio
- Fix broken error detection when breaking layouts"
* tag 'xfs-5.3-fixes-4' of git://git.kernel.org/pub/scm/fs/xfs/xfs-linux:
fs/xfs: Fix return code of xfs_break_leased_layouts()
xfs: fix reflink source file racing with directio writes
vfs: fix page locking deadlocks when deduping files
xfs: compat_ioctl: use compat_ptr()
xfs: fall back to native ioctls for unhandled compat ones
At the moment we initialise the target *mask* of a virtual IRQ to the
VCPU it belongs to, even though this mask is only defined for GICv2 and
quickly runs out of bits for many GICv3 guests.
This behaviour triggers an UBSAN complaint for more than 32 VCPUs:
------
[ 5659.462377] UBSAN: Undefined behaviour in virt/kvm/arm/vgic/vgic-init.c:223:21
[ 5659.471689] shift exponent 32 is too large for 32-bit type 'unsigned int'
------
Also for GICv3 guests the reporting of TARGET in the "vgic-state" debugfs
dump is wrong, due to this very same problem.
Because there is no requirement to create the VGIC device before the
VCPUs (and QEMU actually does it the other way round), we can't safely
initialise mpidr or targets in kvm_vgic_vcpu_init(). But since we touch
every private IRQ for each VCPU anyway later (in vgic_init()), we can
just move the initialisation of those fields into there, where we
definitely know the VGIC type.
On the way make sure we really have either a VGICv2 or a VGICv3 device,
since the existing code is just checking for "VGICv3 or not", silently
ignoring the uninitialised case.
Signed-off-by: Andre Przywara <andre.przywara@arm.com>
Reported-by: Dave Martin <dave.martin@arm.com>
Tested-by: Julien Grall <julien.grall@arm.com>
Signed-off-by: Marc Zyngier <maz@kernel.org>
Pull modules fixes from Jessica Yu:
"Fix BUG_ON() being triggered in frob_text() due to non-page-aligned
module sections"
* tag 'modules-for-v5.3-rc6' of git://git.kernel.org/pub/scm/linux/kernel/git/jeyu/linux:
modules: page-align module section allocations only for arches supporting strict module rwx
modules: always page-align module section allocations
Pull ceph fixes from Ilya Dryomov:
"Three important fixes tagged for stable (an indefinite hang, a crash
on an assert and a NULL pointer dereference) plus a small series from
Luis fixing instances of vfree() under spinlock"
* tag 'ceph-for-5.3-rc6' of git://github.com/ceph/ceph-client:
libceph: fix PG split vs OSD (re)connect race
ceph: don't try fill file_lock on unsuccessful GETFILELOCK reply
ceph: clear page dirty before invalidate page
ceph: fix buffer free while holding i_ceph_lock in fill_inode()
ceph: fix buffer free while holding i_ceph_lock in __ceph_build_xattrs_blob()
ceph: fix buffer free while holding i_ceph_lock in __ceph_setxattr()
libceph: allow ceph_buffer_put() to receive a NULL ceph_buffer
Pull drm fixes from Dave Airlie:
"Live from the laundromat after my washing machine broke down, we have
the 5.3-rc6 fixes. Changelog is in the tag below, but nothing too
noteworthy in here:
rcar-du:
- LVDS dual-link mode fix
mediatek:
- of node refcount fix
- prime buffer import fix
- dma max seg fix
komeda:
- output polling fix
- abfc format fix
- memory-region DT fix
amdgpu:
- bpc display fix
- ioctl memory leak fix
- gfxoff fix
- smu warnings fix
i915:
- HDMI mode readout fix"
* tag 'drm-fixes-2019-08-23' of git://anongit.freedesktop.org/drm/drm:
drm/amdgpu/powerplay: silence a warning in smu_v11_0_setup_pptable
drm/amd/display: Calculate bpc based on max_requested_bpc
drm/amdgpu: prevent memory leaks in AMDGPU_CS ioctl
drm/amd/amdgpu: disable MMHUB PG for navi10
drm/amd/powerplay: remove duplicate macro smu_get_uclk_dpm_states in amdgpu_smu.h
drm/amd/powerplay: fix variable type errors in smu_v11_0_setup_pptable
drm/amdgpu/gfx9: update pg_flags after determining if gfx off is possible
drm/i915: Fix HW readout for crtc_clock in HDMI mode
drm/mediatek: mtk_drm_drv.c: Add of_node_put() before goto
drm: rcar_lvds: Fix dual link mode operations
drm/mediatek: set DMA max segment size
drm/mediatek: use correct device to import PRIME buffers
drm/omap: ensure we have a valid dma_mask
drm/komeda: Add support for 'memory-region' DT node property
drm/komeda: Adds internal bpp computing for arm afbc only format YU08 YU10
drm/komeda: Initialize and enable output polling on Komeda
If the sector number is too high, dm_table_find_target() should return a
pointer to a zeroed dm_target structure (the caller should test it with
dm_target_is_valid).
However, for some table sizes, the code in dm_table_find_target() that
performs btree lookup will access out of bound memory structures.
Fix this bug by testing the sector number at the beginning of
dm_table_find_target(). Also, add an "inline" keyword to the function
dm_table_get_size() because this is a hot path.
Fixes: 512875bd96 ("dm: table detect io beyond device")
Cc: stable@vger.kernel.org
Reported-by: Zhang Tao <kontais@zoho.com>
Signed-off-by: Mikulas Patocka <mpatocka@redhat.com>
Signed-off-by: Mike Snitzer <snitzer@redhat.com>
Benjamin Moody reported to Debian that XFS partially wedges when a chgrp
fails on account of being out of disk quota. I ran his reproducer
script:
# adduser dummy
# adduser dummy plugdev
# dd if=/dev/zero bs=1M count=100 of=test.img
# mkfs.xfs test.img
# mount -t xfs -o gquota test.img /mnt
# mkdir -p /mnt/dummy
# chown -c dummy /mnt/dummy
# xfs_quota -xc 'limit -g bsoft=100k bhard=100k plugdev' /mnt
(and then as user dummy)
$ dd if=/dev/urandom bs=1M count=50 of=/mnt/dummy/foo
$ chgrp plugdev /mnt/dummy/foo
and saw:
================================================
WARNING: lock held when returning to user space!
5.3.0-rc5 #rc5 Tainted: G W
------------------------------------------------
chgrp/47006 is leaving the kernel with locks still held!
1 lock held by chgrp/47006:
#0: 000000006664ea2d (&xfs_nondir_ilock_class){++++}, at: xfs_ilock+0xd2/0x290 [xfs]
...which is clearly caused by xfs_setattr_nonsize failing to unlock the
ILOCK after the xfs_qm_vop_chown_reserve call fails. Add the missing
unlock.
Reported-by: benjamin.moody@gmail.com
Fixes: 253f4911f2 ("xfs: better xfs_trans_alloc interface")
Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com>
Reviewed-by: Dave Chinner <dchinner@redhat.com>
Tested-by: Salvatore Bonaccorso <carnil@debian.org>
While I had thought I had fixed this issue in:
commit 342406e4fb ("drm/nouveau/i2c: Disable i2c bus access after
->fini()")
It turns out that while I did fix the error messages I was seeing on my
P50 when trying to access i2c busses with the GPU in runtime suspend, I
accidentally had missed one important detail that was mentioned on the
bug report this commit was supposed to fix: that the CPU would only lock
up when trying to access i2c busses _on connected devices_ _while the
GPU is not in runtime suspend_. Whoops. That definitely explains why I
was not able to get my machine to hang with i2c bus interactions until
now, as plugging my P50 into it's dock with an HDMI monitor connected
allowed me to finally reproduce this locally.
Now that I have managed to reproduce this issue properly, it looks like
the problem is much simpler then it looks. It turns out that some
connected devices, such as MST laptop docks, will actually ACK i2c reads
even if no data was actually read:
[ 275.063043] nouveau 0000:01:00.0: i2c: aux 000a: 1: 0000004c 1
[ 275.063447] nouveau 0000:01:00.0: i2c: aux 000a: 00 01101000 10040000
[ 275.063759] nouveau 0000:01:00.0: i2c: aux 000a: rd 00000001
[ 275.064024] nouveau 0000:01:00.0: i2c: aux 000a: rd 00000000
[ 275.064285] nouveau 0000:01:00.0: i2c: aux 000a: rd 00000000
[ 275.064594] nouveau 0000:01:00.0: i2c: aux 000a: rd 00000000
Because we don't handle the situation of i2c ack without any data, we
end up entering an infinite loop in nvkm_i2c_aux_i2c_xfer() since the
value of cnt always remains at 0. This finally properly explains how
this could result in a CPU hang like the ones observed in the
aforementioned commit.
So, fix this by retrying transactions if no data is written or received,
and give up and fail the transaction if we continue to not write or
receive any data after 32 retries.
Signed-off-by: Lyude Paul <lyude@redhat.com>
Cc: stable@vger.kernel.org
Signed-off-by: Ben Skeggs <bskeggs@redhat.com>
The outer poll loop checks for whether we need to reschedule, and
returns to userspace if we do. However, it's possible to get stuck
in the inner loop as well, if the CPU we are running on needs to
reschedule to finish the IO work.
Add the need_resched() check in the inner loop as well. This fixes
a potential hang if the kernel is configured with
CONFIG_PREEMPT_VOLUNTARY=y.
Reported-by: Sagi Grimberg <sagi@grimberg.me>
Reviewed-by: Sagi Grimberg <sagi@grimberg.me>
Tested-by: Sagi Grimberg <sagi@grimberg.me>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
Pull PCI fixes from Bjorn Helgaas:
- Reset both NVIDIA GPU and HDA in ThinkPad P50 quirk, which was broken
by another quirk that enabled the HDA device (Lyude Paul)
- Fix pciebus-howto.rst documentation filename typo (Bjorn Helgaas)
* tag 'pci-v5.3-fixes-1' of git://git.kernel.org/pub/scm/linux/kernel/git/helgaas/pci:
Documentation PCI: Fix pciebus-howto.rst filename typo
PCI: Reset both NVIDIA GPU and HDA in ThinkPad P50 workaround
In commit 6096d91af0 ("dm space map metadata: fix occasional leak
of a metadata block on resize"), we refactor the commit logic to a new
function 'apply_bops'. But when that logic was replaced in out() the
return value was not stored. This may lead out() returning a wrong
value to the caller.
Fixes: 6096d91af0 ("dm space map metadata: fix occasional leak of a metadata block on resize")
Cc: stable@vger.kernel.org
Signed-off-by: ZhangXiaoxu <zhangxiaoxu5@huawei.com>
Signed-off-by: Mike Snitzer <snitzer@redhat.com>
When btree_split_beneath() splits a node to two new children, it will
allocate two blocks: left and right. If right block's allocation
failed, the left block will be unlocked and marked dirty. If this
happened, the left block'ss content is zero, because it wasn't
initialized with the btree struct before the attempot to allocate the
right block. Upon return, when flushing the left block to disk, the
validator will fail when check this block. Then a BUG_ON is raised.
Fix this by completely initializing the left block before allocating and
initializing the right block.
Fixes: 4dcb8b57df ("dm btree: fix leak of bufio-backed block in btree_split_beneath error path")
Cc: stable@vger.kernel.org
Signed-off-by: ZhangXiaoxu <zhangxiaoxu5@huawei.com>
Signed-off-by: Mike Snitzer <snitzer@redhat.com>
Pull more fallthrough fixes from Gustavo A. R. Silva:
"Fix fall-through warnings on arm and mips for multiple configurations"
* tag 'Wimplicit-fallthrough-5.3-rc6' of git://git.kernel.org/pub/scm/linux/kernel/git/gustavoars/linux:
video: fbdev: acornfb: Mark expected switch fall-through
scsi: libsas: sas_discover: Mark expected switch fall-through
MIPS: Octeon: Mark expected switch fall-through
power: supply: ab8500_charger: Mark expected switch fall-through
watchdog: wdt285: Mark expected switch fall-through
mtd: sa1100: Mark expected switch fall-through
drm/sun4i: tcon: Mark expected switch fall-through
drm/sun4i: sun6i_mipi_dsi: Mark expected switch fall-through
ARM: riscpc: Mark expected switch fall-through
dmaengine: fsldma: Mark expected switch fall-through
Pull chrome platform fix from Benson Leung:
"Fix a kernel crash during suspend/resume of cros_ec_ishtp"
* tag 'tag-chrome-platform-fixes-for-v5.3-rc6' of git://git.kernel.org/pub/scm/linux/kernel/git/chrome-platform/linux:
platform/chrome: cros_ec_ishtp: fix crash during suspend
Pull AFS fixes from David Howells:
- Fix a cell record leak due to the default error not being cleared.
- Fix an oops in tracepoint due to a pointer that may contain an error.
- Fix the ACL storage op for YFS where the wrong op definition is being
used. By luck, this only actually affects the information appearing
in traces.
* tag 'afs-fixes-20190822' of git://git.kernel.org/pub/scm/linux/kernel/git/dhowells/linux-fs:
afs: use correct afs_call_type in yfs_fs_store_opaque_acl2
afs: Fix possible oops in afs_lookup trace event
afs: Fix leak in afs_lookup_cell_rcu()
All user level and most in-kernel applications submit WQEs
where the SG list entries are all of a single type.
iSER in particular, however, will send us WQEs with mixed SG
types: sge[0] = kernel buffer, sge[1] = PBL region.
Check and set is_kva on each SG entry individually instead of
assuming the first SGE type carries through to the last.
This fixes iSER over siw.
Fixes: b9be6f18cf ("rdma/siw: transmit path")
Reported-by: Krishnamraju Eraparaju <krishna2@chelsio.com>
Tested-by: Krishnamraju Eraparaju <krishna2@chelsio.com>
Signed-off-by: Bernard Metzler <bmt@zurich.ibm.com>
Link: https://lore.kernel.org/r/20190822150741.21871-1-bmt@zurich.ibm.com
Signed-off-by: Doug Ledford <dledford@redhat.com>
It seems that 'yfs_RXYFSStoreOpaqueACL2' should be use in
yfs_fs_store_opaque_acl2().
Fixes: f5e4546347 ("afs: Implement YFS ACL setting")
Signed-off-by: YueHaibing <yuehaibing@huawei.com>
Signed-off-by: David Howells <dhowells@redhat.com>
The afs_lookup trace event can cause the following:
[ 216.576777] BUG: kernel NULL pointer dereference, address: 000000000000023b
[ 216.576803] #PF: supervisor read access in kernel mode
[ 216.576813] #PF: error_code(0x0000) - not-present page
...
[ 216.576913] RIP: 0010:trace_event_raw_event_afs_lookup+0x9e/0x1c0 [kafs]
If the inode from afs_do_lookup() is an error other than ENOENT, or if it
is ENOENT and afs_try_auto_mntpt() returns an error, the trace event will
try to dereference the error pointer as a valid pointer.
Use IS_ERR_OR_NULL to only pass a valid pointer for the trace, or NULL.
Ideally the trace would include the error value, but for now just avoid
the oops.
Fixes: 80548b0399 ("afs: Add more tracepoints")
Signed-off-by: Marc Dionne <marc.dionne@auristor.com>
Signed-off-by: David Howells <dhowells@redhat.com>
Fix a leak on the cell refcount in afs_lookup_cell_rcu() due to
non-clearance of the default error in the case a NULL cell name is passed
and the workstation default cell is used.
Also put a bit at the end to make sure we don't leak a cell ref if we're
going to be returning an error.
This leak results in an assertion like the following when the kafs module is
unloaded:
AFS: Assertion failed
2 == 1 is false
0x2 == 0x1 is false
------------[ cut here ]------------
kernel BUG at fs/afs/cell.c:770!
...
RIP: 0010:afs_manage_cells+0x220/0x42f [kafs]
...
process_one_work+0x4c2/0x82c
? pool_mayday_timeout+0x1e1/0x1e1
? do_raw_spin_lock+0x134/0x175
worker_thread+0x336/0x4a6
? rescuer_thread+0x4af/0x4af
kthread+0x1de/0x1ee
? kthread_park+0xd4/0xd4
ret_from_fork+0x24/0x30
Fixes: 989782dcdc ("afs: Overhaul cell database management")
Signed-off-by: David Howells <dhowells@redhat.com>
If after an MMIO exit to userspace a VCPU is immediately run with an
immediate_exit request, such as when a signal is delivered or an MMIO
emulation completion is needed, then the VCPU completes the MMIO
emulation and immediately returns to userspace. As the exit_reason
does not get changed from KVM_EXIT_MMIO in these cases we have to
be careful not to complete the MMIO emulation again, when the VCPU is
eventually run again, because the emulation does an instruction skip
(and doing too many skips would be a waste of guest code :-) We need
to use additional VCPU state to track if the emulation is complete.
As luck would have it, we already have 'mmio_needed', which even
appears to be used in this way by other architectures already.
Fixes: 0d640732db ("arm64: KVM: Skip MMIO insn after emulation")
Acked-by: Mark Rutland <mark.rutland@arm.com>
Signed-off-by: Andrew Jones <drjones@redhat.com>
Signed-off-by: Marc Zyngier <maz@kernel.org>
We can't rely on ->peer_features in calc_target() because it may be
called both when the OSD session is established and open and when it's
not. ->peer_features is not valid unless the OSD session is open. If
this happens on a PG split (pg_num increase), that could mean we don't
resend a request that should have been resent, hanging the client
indefinitely.
In userspace this was fixed by looking at require_osd_release and
get_xinfo[osd].features fields of the osdmap. However these fields
belong to the OSD section of the osdmap, which the kernel doesn't
decode (only the client section is decoded).
Instead, let's drop this feature check. It effectively checks for
luminous, so only pre-luminous OSDs would be affected in that on a PG
split the kernel might resend a request that should not have been
resent. Duplicates can occur in other scenarios, so both sides should
already be prepared for them: see dup/replay logic on the OSD side and
retry_attempt check on the client side.
Cc: stable@vger.kernel.org
Fixes: 7de030d6b1 ("libceph: resend on PG splits if OSD has RESEND_ON_SPLIT")
Link: https://tracker.ceph.com/issues/41162
Reported-by: Jerry Lee <leisurelysw24@gmail.com>
Signed-off-by: Ilya Dryomov <idryomov@gmail.com>
Tested-by: Jerry Lee <leisurelysw24@gmail.com>
Reviewed-by: Jeff Layton <jlayton@kernel.org>
When ceph_mdsc_do_request returns an error, we can't assume that the
filelock_reply pointer will be set. Only try to fetch fields out of
the r_reply_info when it returns success.
Cc: stable@vger.kernel.org
Reported-by: Hector Martin <hector@marcansoft.com>
Signed-off-by: Jeff Layton <jlayton@kernel.org>
Reviewed-by: "Yan, Zheng" <zyan@redhat.com>
Signed-off-by: Ilya Dryomov <idryomov@gmail.com>
Calling ceph_buffer_put() in fill_inode() may result in freeing the
i_xattrs.blob buffer while holding the i_ceph_lock. This can be fixed by
postponing the call until later, when the lock is released.
The following backtrace was triggered by fstests generic/070.
BUG: sleeping function called from invalid context at mm/vmalloc.c:2283
in_atomic(): 1, irqs_disabled(): 0, pid: 3852, name: kworker/0:4
6 locks held by kworker/0:4/3852:
#0: 000000004270f6bb ((wq_completion)ceph-msgr){+.+.}, at: process_one_work+0x1b8/0x5f0
#1: 00000000eb420803 ((work_completion)(&(&con->work)->work)){+.+.}, at: process_one_work+0x1b8/0x5f0
#2: 00000000be1c53a4 (&s->s_mutex){+.+.}, at: dispatch+0x288/0x1476
#3: 00000000559cb958 (&mdsc->snap_rwsem){++++}, at: dispatch+0x2eb/0x1476
#4: 000000000d5ebbae (&req->r_fill_mutex){+.+.}, at: dispatch+0x2fc/0x1476
#5: 00000000a83d0514 (&(&ci->i_ceph_lock)->rlock){+.+.}, at: fill_inode.isra.0+0xf8/0xf70
CPU: 0 PID: 3852 Comm: kworker/0:4 Not tainted 5.2.0+ #441
Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.12.1-0-ga5cab58-prebuilt.qemu.org 04/01/2014
Workqueue: ceph-msgr ceph_con_workfn
Call Trace:
dump_stack+0x67/0x90
___might_sleep.cold+0x9f/0xb1
vfree+0x4b/0x60
ceph_buffer_release+0x1b/0x60
fill_inode.isra.0+0xa9b/0xf70
ceph_fill_trace+0x13b/0xc70
? dispatch+0x2eb/0x1476
dispatch+0x320/0x1476
? __mutex_unlock_slowpath+0x4d/0x2a0
ceph_con_workfn+0xc97/0x2ec0
? process_one_work+0x1b8/0x5f0
process_one_work+0x244/0x5f0
worker_thread+0x4d/0x3e0
kthread+0x105/0x140
? process_one_work+0x5f0/0x5f0
? kthread_park+0x90/0x90
ret_from_fork+0x3a/0x50
Signed-off-by: Luis Henriques <lhenriques@suse.com>
Reviewed-by: Jeff Layton <jlayton@kernel.org>
Signed-off-by: Ilya Dryomov <idryomov@gmail.com>
Calling ceph_buffer_put() in __ceph_build_xattrs_blob() may result in
freeing the i_xattrs.blob buffer while holding the i_ceph_lock. This can
be fixed by having this function returning the old blob buffer and have
the callers of this function freeing it when the lock is released.
The following backtrace was triggered by fstests generic/117.
BUG: sleeping function called from invalid context at mm/vmalloc.c:2283
in_atomic(): 1, irqs_disabled(): 0, pid: 649, name: fsstress
4 locks held by fsstress/649:
#0: 00000000a7478e7e (&type->s_umount_key#19){++++}, at: iterate_supers+0x77/0xf0
#1: 00000000f8de1423 (&(&ci->i_ceph_lock)->rlock){+.+.}, at: ceph_check_caps+0x7b/0xc60
#2: 00000000562f2b27 (&s->s_mutex){+.+.}, at: ceph_check_caps+0x3bd/0xc60
#3: 00000000f83ce16a (&mdsc->snap_rwsem){++++}, at: ceph_check_caps+0x3ed/0xc60
CPU: 1 PID: 649 Comm: fsstress Not tainted 5.2.0+ #439
Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.12.1-0-ga5cab58-prebuilt.qemu.org 04/01/2014
Call Trace:
dump_stack+0x67/0x90
___might_sleep.cold+0x9f/0xb1
vfree+0x4b/0x60
ceph_buffer_release+0x1b/0x60
__ceph_build_xattrs_blob+0x12b/0x170
__send_cap+0x302/0x540
? __lock_acquire+0x23c/0x1e40
? __mark_caps_flushing+0x15c/0x280
? _raw_spin_unlock+0x24/0x30
ceph_check_caps+0x5f0/0xc60
ceph_flush_dirty_caps+0x7c/0x150
? __ia32_sys_fdatasync+0x20/0x20
ceph_sync_fs+0x5a/0x130
iterate_supers+0x8f/0xf0
ksys_sync+0x4f/0xb0
__ia32_sys_sync+0xa/0x10
do_syscall_64+0x50/0x1c0
entry_SYSCALL_64_after_hwframe+0x49/0xbe
RIP: 0033:0x7fc6409ab617
Signed-off-by: Luis Henriques <lhenriques@suse.com>
Reviewed-by: Jeff Layton <jlayton@kernel.org>
Signed-off-by: Ilya Dryomov <idryomov@gmail.com>
Calling ceph_buffer_put() in __ceph_setxattr() may end up freeing the
i_xattrs.prealloc_blob buffer while holding the i_ceph_lock. This can be
fixed by postponing the call until later, when the lock is released.
The following backtrace was triggered by fstests generic/117.
BUG: sleeping function called from invalid context at mm/vmalloc.c:2283
in_atomic(): 1, irqs_disabled(): 0, pid: 650, name: fsstress
3 locks held by fsstress/650:
#0: 00000000870a0fe8 (sb_writers#8){.+.+}, at: mnt_want_write+0x20/0x50
#1: 00000000ba0c4c74 (&type->i_mutex_dir_key#6){++++}, at: vfs_setxattr+0x55/0xa0
#2: 000000008dfbb3f2 (&(&ci->i_ceph_lock)->rlock){+.+.}, at: __ceph_setxattr+0x297/0x810
CPU: 1 PID: 650 Comm: fsstress Not tainted 5.2.0+ #437
Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.12.1-0-ga5cab58-prebuilt.qemu.org 04/01/2014
Call Trace:
dump_stack+0x67/0x90
___might_sleep.cold+0x9f/0xb1
vfree+0x4b/0x60
ceph_buffer_release+0x1b/0x60
__ceph_setxattr+0x2b4/0x810
__vfs_setxattr+0x66/0x80
__vfs_setxattr_noperm+0x59/0xf0
vfs_setxattr+0x81/0xa0
setxattr+0x115/0x230
? filename_lookup+0xc9/0x140
? rcu_read_lock_sched_held+0x74/0x80
? rcu_sync_lockdep_assert+0x2e/0x60
? __sb_start_write+0x142/0x1a0
? mnt_want_write+0x20/0x50
path_setxattr+0xba/0xd0
__x64_sys_lsetxattr+0x24/0x30
do_syscall_64+0x50/0x1c0
entry_SYSCALL_64_after_hwframe+0x49/0xbe
RIP: 0033:0x7ff23514359a
Signed-off-by: Luis Henriques <lhenriques@suse.com>
Reviewed-by: Jeff Layton <jlayton@kernel.org>
Signed-off-by: Ilya Dryomov <idryomov@gmail.com>
I have been reviewing patches for md in the past few months. Mark me
as the MD maintainer, as I have effectively been filling that role.
Cc: NeilBrown <neilb@suse.com>
Signed-off-by: Song Liu <songliubraving@fb.com>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
[Why]
The only place where state->max_bpc is updated on the connector is
at the start of atomic check during drm_atomic_connector_check. It
isn't updated when adding the connectors to the atomic state after
the fact. It also doesn't necessarily reflect the right value when
called in amdgpu during mode validation outside of atomic check.
This can cause the wrong bpc to be used even if the max_requested_bpc
is the correct value.
[How]
Don't rely on state->max_bpc reflecting the real bpc value and just
do the min(...) based on display info bpc and max_requested_bpc.
Fixes: 01933ba42d ("drm/amd/display: Use current connector state if NULL when checking bpc")
Signed-off-by: Nicholas Kazlauskas <nicholas.kazlauskas@amd.com>
Reviewed-by: Leo Li <sunpeng.li@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Error out if the AMDGPU_CS ioctl is called with multiple SYNCOBJ_OUT and/or
TIMELINE_SIGNAL chunks, since otherwise the last chunk wins while the
allocated array as well as the reference counts of sync objects are leaked.
Signed-off-by: Nicolai Hähnle <nicolai.haehnle@amd.com>
Reviewed-by: Christian König <christian.koenig@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
