diff options
| author | Amir Goldstein <[email protected]> | 2025-03-12 07:38:50 +0000 |
|---|---|---|
| committer | Jan Kara <[email protected]> | 2025-03-13 15:30:55 +0000 |
| commit | 955fbe0ef19df4197595a98d0906c94025c4beef (patch) | |
| tree | d4861dcd0c0359816ec8e520cd2ba0ea3832b2ed /net/unix/garbage.c | |
| parent | Revert "xfs: add pre-content fsnotify hook for DAX faults" (diff) | |
| download | kernel-955fbe0ef19df4197595a98d0906c94025c4beef.tar.gz kernel-955fbe0ef19df4197595a98d0906c94025c4beef.zip | |
Revert "fsnotify: generate pre-content permission event on page fault"
This reverts commit 8392bc2ff8c8bf7c4c5e6dfa71ccd893a3c046f6.
In the use case of buffered write whose input buffer is mmapped file on a
filesystem with a pre-content mark, the prefaulting of the buffer can
happen under the filesystem freeze protection (obtained in vfs_write())
which breaks assumptions of pre-content hook and introduces potential
deadlock of HSM handler in userspace with filesystem freezing.
Now that we have pre-content hooks at file mmap() time, disable the
pre-content event hooks on page fault to avoid the potential deadlock.
Reported-by: [email protected]
Closes: https://lore.kernel.org/linux-fsdevel/7ehxrhbvehlrjwvrduoxsao5k3x4aw275patsb3krkwuq573yv@o2hskrfawbnc/
Fixes: 8392bc2ff8c8 ("fsnotify: generate pre-content permission event on page fault")
Signed-off-by: Amir Goldstein <[email protected]>
Signed-off-by: Jan Kara <[email protected]>
Link: https://patch.msgid.link/[email protected]
Diffstat (limited to 'net/unix/garbage.c')
0 files changed, 0 insertions, 0 deletions