diff options
| author | Eric Biggers <ebiggers@google.com> | 2021-12-08 17:04:53 -0800 |
|---|---|---|
| committer | Eric Biggers <ebiggers@google.com> | 2021-12-09 10:49:56 -0800 |
| commit | 9537bae0da1f8d1e2361ab6d0479e8af7824e160 (patch) | |
| tree | 5afede8161feeef64b89b0eb31fcd12aaa7a2955 /fs/aio.c | |
| parent | a880b28a71e39013e357fd3adccd1d8a31bc69a8 (diff) | |
signalfd: use wake_up_pollfree()
wake_up_poll() uses nr_exclusive=1, so it's not guaranteed to wake up
all exclusive waiters. Yet, POLLFREE *must* wake up all waiters. epoll
and aio poll are fortunately not affected by this, but it's very
fragile. Thus, the new function wake_up_pollfree() has been introduced.
Convert signalfd to use wake_up_pollfree().
Reported-by: Linus Torvalds <torvalds@linux-foundation.org>
Fixes: d80e731ecab4 ("epoll: introduce POLLFREE to flush ->signalfd_wqh before kfree()")
Cc: stable@vger.kernel.org
Link: https://lore.kernel.org/r/20211209010455.42744-4-ebiggers@kernel.org
Signed-off-by: Eric Biggers <ebiggers@google.com>
Diffstat (limited to 'fs/aio.c')
0 files changed, 0 insertions, 0 deletions