6736fde967
The code within wait_event_interruptible() is called with
!TASK_RUNNING, so mustn't call any functions that can sleep,
like mutex_lock().
Since we re-check the list_empty() in a loop after the wait,
it's safe to simply use list_empty() without locking.
This bug has existed forever, but was only discovered now
because all userspace implementations, including the default
'rfkill' tool, use poll() or select() to get a readable fd
before attempting to read.
Cc: stable@vger.kernel.org
Fixes:
|
||
|---|---|---|
| .. | ||
| core.c | ||
| input.c | ||
| Kconfig | ||
| Makefile | ||
| rfkill-gpio.c | ||
| rfkill-regulator.c | ||
| rfkill.h | ||