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| author | Shin'ichiro Kawasaki <shinichiro.kawasaki@wdc.com> | 2021-11-09 19:47:23 +0900 |
|---|---|---|
| committer | Jens Axboe <axboe@kernel.dk> | 2021-11-09 12:41:12 -0700 |
| commit | 35e4c6c1a2fc2eb11b9306e95cda1fa06a511948 (patch) | |
| tree | c1eccdc97dcae1924e073b8f83885e5f7e166f47 /lib/test_firmware.c | |
| parent | 7607c44c157d343223510c8ffdf7206fdd2a6213 (diff) | |
| download | linux-35e4c6c1a2fc2eb11b9306e95cda1fa06a511948.tar.gz | |
block: Hold invalidate_lock in BLKZEROOUT ioctl
When BLKZEROOUT ioctl and data read race, the data read leaves stale
page cache. To avoid the stale page cache, hold invalidate_lock of the
block device file mapping. The stale page cache is observed when
blktests test case block/009 is modified to call "blkdiscard -z" command
and repeated hundreds of times.
This patch can be applied back to the stable kernel version v5.15.y.
Rework is required for older stable kernels.
Fixes: 22dd6d356628 ("block: invalidate the page cache when issuing BLKZEROOUT")
Signed-off-by: Shin'ichiro Kawasaki <shinichiro.kawasaki@wdc.com>
Cc: stable@vger.kernel.org # v5.15
Reviewed-by: Jan Kara <jack@suse.cz>
Link: https://lore.kernel.org/r/20211109104723.835533-3-shinichiro.kawasaki@wdc.com
Signed-off-by: Jens Axboe <axboe@kernel.dk>
Diffstat (limited to 'lib/test_firmware.c')
0 files changed, 0 insertions, 0 deletions