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| author | Kent Overstreet <kent.overstreet@linux.dev> | 2024-04-01 00:52:12 +0300 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2024-04-10 17:38:19 +0300 |
| commit | 9678bcc6234d83759fe091c197f5017a32b468da (patch) | |
| tree | 7a93d042bb02da9ce4eeeb4e08c2c7963af5bc49 /arch | |
| parent | b06f306af91868c9d610816318099a86b45d457f (diff) | |
| download | linux-9678bcc6234d83759fe091c197f5017a32b468da.tar.xz | |
aio: Fix null ptr deref in aio_complete() wakeup
commit caeb4b0a11b3393e43f7fa8e0a5a18462acc66bd upstream.
list_del_init_careful() needs to be the last access to the wait queue
entry - it effectively unlocks access.
Previously, finish_wait() would see the empty list head and skip taking
the lock, and then we'd return - but the completion path would still
attempt to do the wakeup after the task_struct pointer had been
overwritten.
Fixes: 71eb6b6b0ba9 ("fs/aio: obey min_nr when doing wakeups")
Cc: stable@vger.kernel.org
Link: https://lore.kernel.org/linux-fsdevel/CAHTA-ubfwwB51A5Wg5M6H_rPEQK9pNf8FkAGH=vr=FEkyRrtqw@mail.gmail.com/
Signed-off-by: Kent Overstreet <kent.overstreet@linux.dev>
Link: https://lore.kernel.org/stable/20240331215212.522544-1-kent.overstreet%40linux.dev
Link: https://lore.kernel.org/r/20240331215212.522544-1-kent.overstreet@linux.dev
Signed-off-by: Christian Brauner <brauner@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'arch')
0 files changed, 0 insertions, 0 deletions