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Alex Williamson be6ea2dca6 vfio/pci: Clear token on bypass registration failure 
[ Upstream commit 852b1beecb6ff9326f7ca4bc0fe69ae860ebdb9e ]

The eventfd context is used as our irqbypass token, therefore if an
eventfd is re-used, our token is the same.  The irqbypass code will
return an -EBUSY in this case, but we'll still attempt to unregister
the producer, where if that duplicate token still exists, results in
removing the wrong object.  Clear the token of failed producers so
that they harmlessly fall out when unregistered.

Fixes: 6d7425f109d2 ("vfio: Register/unregister irq_bypass_producer")
Reported-by: guomin chen <guomin_chen@sina.com>
Tested-by: guomin chen <guomin_chen@sina.com>
Signed-off-by: Alex Williamson <alex.williamson@redhat.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
 		2021-03-16 16:39:03 +08:00
Documentation x86/fpu: Allow multiple bits in clearcpuid= parameter 2021-03-16 16:38:22 +08:00
LICENSES Init Repo base on linux 5.4.32 long term, and add base tlinux kernel interfaces. 2021-03-16 11:01:34 +08:00
arch powerpc/perf/hv-gpci: Fix starting index value 2021-03-16 16:38:56 +08:00
block blk-mq: move cancel of hctx->run_work to the front of blk_exit_queue 2021-03-16 16:38:30 +08:00
certs Init Repo base on linux 5.4.32 long term, and add base tlinux kernel interfaces. 2021-03-16 11:01:34 +08:00
crypto crypto: algif_skcipher - EBUSY on aio should be an error 2021-03-16 16:38:24 +08:00
drivers vfio/pci: Clear token on bypass registration failure 2021-03-16 16:39:03 +08:00
fs ext4: limit entries returned when counting fsmap records 2021-03-16 16:39:03 +08:00
include PCI/IOV: Mark VFs as not implementing PCI_COMMAND_MEMORY 2021-03-16 16:39:00 +08:00
init kprobes: tracing/kprobes: Fix to kill kprobes on initmem after boot 2021-03-16 16:37:39 +08:00
ipc ipc/util.c: sysvipc_find_ipc() incorrectly updates position index 2021-03-16 16:27:51 +08:00
kernel module: statically initialize init section freeing data 2021-03-16 16:39:01 +08:00
lib lib/crc32.c: fix trivial typo in preprocessor condition 2021-03-16 16:38:58 +08:00
mm mm/page_owner: change split_page_owner to take a count 2021-03-16 16:38:58 +08:00
net svcrdma: fix bounce buffers for unaligned offsets and multiple pages 2021-03-16 16:39:03 +08:00
package config/arm64: OPEN CONFIG_PSI and phytium configs 2021-03-16 11:02:59 +08:00
samples bpf: Fix fds_example SIGSEGV error 2021-03-16 16:33:24 +08:00
scripts scripts/dtc: only append to HOST_EXTRACFLAGS instead of overwriting 2021-03-16 16:37:50 +08:00
security ima: Don't ignore errors from crypto_shash_update() 2021-03-16 16:38:21 +08:00
sound ASoC: fsl_sai: Instantiate snd_soc_dai_driver 2021-03-16 16:38:42 +08:00
tools selftests/powerpc: Fix eeh-basic.sh exit codes 2021-03-16 16:38:57 +08:00
usr Init Repo base on linux 5.4.32 long term, and add base tlinux kernel interfaces. 2021-03-16 11:01:34 +08:00
virt KVM: arm64: Assume write fault on S1PTW permission fault on instruction fetch 2021-03-16 16:37:40 +08:00
.clang-format Init Repo base on linux 5.4.32 long term, and add base tlinux kernel interfaces. 2021-03-16 11:01:34 +08:00
.cocciconfig Init Repo base on linux 5.4.32 long term, and add base tlinux kernel interfaces. 2021-03-16 11:01:34 +08:00
.get_maintainer.ignore Init Repo base on linux 5.4.32 long term, and add base tlinux kernel interfaces. 2021-03-16 11:01:34 +08:00
.gitattributes Init Repo base on linux 5.4.32 long term, and add base tlinux kernel interfaces. 2021-03-16 11:01:34 +08:00
.gitignore Init Repo base on linux 5.4.32 long term, and add base tlinux kernel interfaces. 2021-03-16 11:01:34 +08:00
COPYING Init Repo base on linux 5.4.32 long term, and add base tlinux kernel interfaces. 2021-03-16 11:01:34 +08:00
CREDITS Init Repo base on linux 5.4.32 long term, and add base tlinux kernel interfaces. 2021-03-16 11:01:34 +08:00
Kbuild Init Repo base on linux 5.4.32 long term, and add base tlinux kernel interfaces. 2021-03-16 11:01:34 +08:00
Kconfig Init Repo base on linux 5.4.32 long term, and add base tlinux kernel interfaces. 2021-03-16 11:01:34 +08:00
MAINTAINERS Documentation/llvm: add documentation on building w/ Clang/LLVM 2021-03-16 16:34:24 +08:00
Makefile kbuild: fix broken builds because of GZIP,BZIP2,LZOP variables 2021-03-16 16:35:20 +08:00
README Init Repo base on linux 5.4.32 long term, and add base tlinux kernel interfaces. 2021-03-16 11:01:34 +08:00
README.md Init Repo base on linux 5.4.32 long term, and add base tlinux kernel interfaces. 2021-03-16 11:01:34 +08:00
backport_remove_lists.txt Init Repo base on linux 5.4.32 long term, and add base tlinux kernel interfaces. 2021-03-16 11:01:34 +08:00
tools_key.pub Init Repo base on linux 5.4.32 long term, and add base tlinux kernel interfaces. 2021-03-16 11:01:34 +08:00

README.md

Tencent Linux Kernel 4.0