diff options
| author | Cássio Gabriel <cassiogabrielcontato@gmail.com> | 2026-05-06 00:34:47 -0300 |
|---|---|---|
| committer | Takashi Iwai <tiwai@suse.de> | 2026-05-06 10:07:36 +0200 |
| commit | 5337213381df578058e2e41da93cbd0e4639935f (patch) | |
| tree | 60dbe636cc177f2cff2faed68d3f631250c36027 /drivers/net | |
| parent | 01801e20d69346e1e6cec0d908f1cea3a49e51b5 (diff) | |
ALSA: core: Serialize deferred fasync state checks
snd_fasync_helper() updates fasync->on under snd_fasync_lock, and
snd_fasync_work_fn() now also evaluates fasync->on under the same
lock. snd_kill_fasync() still tests the flag before taking the lock,
leaving an unsynchronized read against FASYNC enable/disable updates.
Move the enabled-state check into the locked section.
Also clear fasync->on under snd_fasync_lock in snd_fasync_free()
before unlinking the pending entry. Together with the locked sender-side
check, this publishes teardown before flushing the deferred work and
prevents a racing sender from requeueing the entry after free has
started.
Fixes: ef34a0ae7a26 ("ALSA: core: Add async signal helpers")
Fixes: 8146cd333d23 ("ALSA: core: Fix potential data race at fasync handling")
Cc: stable@vger.kernel.org
Signed-off-by: Cássio Gabriel <cassiogabrielcontato@gmail.com>
Link: https://patch.msgid.link/20260506-alsa-core-fasync-on-lock-v1-1-ea48c77d6ca4@gmail.com
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Diffstat (limited to 'drivers/net')
0 files changed, 0 insertions, 0 deletions