iio: trigger: cancel reenable_work before freeing trigger

Browse source

iio_trigger_notify_done_atomic() defers ->reenable() into
trig->reenable_work on the system workqueue, and the worker dereferences
the owning trigger through container_of().  Nothing cancels this work
before iio_trig_release() frees the trigger, so a worker armed by the
last in-flight IRQ can outlive the free and touch freed memory.

Cancel it at the top of iio_trig_release(), which every free path
reaches through the device core's final put_device().

Found by an in-house static analysis tool.

Fixes: 9020ef6598 ("iio: trigger: Fix a scheduling whilst atomic issue seen on tsc2046")
Cc: stable@vger.kernel.org
Assisted-by: Codex:gpt-5.6
Signed-off-by: Fan Wu <fanwu01@zju.edu.cn>
Signed-off-by: Jonathan Cameron <jonathan.cameron@oss.qualcomm.com>

...

This commit is contained in:

Fan Wu 2026-08-06 14:25:02 +00:00 • committed by Jonathan Cameron

parent 2093236e88

commit 2a57b9246c

1 changed files with 2 additions and 0 deletions

Show all changes Ignore whitespace when comparing lines Ignore changes in amount of whitespace Ignore changes in whitespace at EOL

Download patch file Download diff file Expand all files Collapse all files

2

drivers/iio/industrialio-trigger.c

View file