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| author | Linus Torvalds <torvalds@linux-foundation.org> | 2018-01-05 16:26:00 -0800 |
|---|---|---|
| committer | Gerrit - the friendly Code Review server <code-review@localhost> | 2018-05-29 01:50:38 -0700 |
| commit | 9233e77c01b75bd5c625a9fa5f23108af66c63f9 (patch) | |
| tree | 40640dc09d8881c9773207ae19847c3470ced269 /net/lapb/lapb_timer.c | |
| parent | d109e62922ad25c23e44cd44ba6b1b63080099e2 (diff) | |
loop: fix concurrent lo_open/lo_release
范龙飞 reports that KASAN can report a use-after-free in __lock_acquire.
The reason is due to insufficient serialization in lo_release(), which
will continue to use the loop device even after it has decremented the
lo_refcnt to zero.
In the meantime, another process can come in, open the loop device
again as it is being shut down. Confusion ensues.
Reported-by: 范龙飞 <long7573@126.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
Git-commit: ae6650163c66a7eff1acd6eb8b0f752dcfa8eba5
Git-repo: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
Change-Id: I965ddcdc2a9d27fd56a54d2886b7c3861c21b05f
Signed-off-by: Srinivasa Rao Kuppala <srkupp@codeaurora.org>
Diffstat (limited to 'net/lapb/lapb_timer.c')
0 files changed, 0 insertions, 0 deletions