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![]() A race condition is possible when writing to events_queue_size where the
events kfifo is freed during the execution of a kfifo_in(), resulting in
a use-after-free. This patch prevents such a scenario by protecting the
events queue in operation with a spinlock and locking before performing
the events queue size adjustment.
The existing events_lock mutex is renamed to events_out_lock to reflect
that it only protects events queue out operations. Because the events
queue in operations can occur in an interrupt context, a new
events_in_lock spinlock is introduced and utilized.
Fixes:
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.. | ||
104-quad-8.c | ||
counter-chrdev.c | ||
counter-chrdev.h | ||
counter-core.c | ||
counter-sysfs.c | ||
counter-sysfs.h | ||
ftm-quaddec.c | ||
intel-qep.c | ||
interrupt-cnt.c | ||
Kconfig | ||
Makefile | ||
microchip-tcb-capture.c | ||
stm32-lptimer-cnt.c | ||
stm32-timer-cnt.c | ||
ti-eqep.c |