futex: Fix futex_waitv() hrtimer debug object leak on kcalloc error
authorMathieu Desnoyers <mathieu.desnoyers@efficios.com>
Wed, 14 Dec 2022 22:20:08 +0000 (17:20 -0500)
committerPeter Zijlstra <peterz@infradead.org>
Tue, 27 Dec 2022 11:52:02 +0000 (12:52 +0100)
commit94cd8fa09f5f1ebdd4e90964b08b7f2cc4b36c43
tree32a343b8c47df565e4af74fbf04236053a150f51
parent1c0908d8e441631f5b8ba433523cf39339ee2ba0
futex: Fix futex_waitv() hrtimer debug object leak on kcalloc error

In a scenario where kcalloc() fails to allocate memory, the futex_waitv
system call immediately returns -ENOMEM without invoking
destroy_hrtimer_on_stack(). When CONFIG_DEBUG_OBJECTS_TIMERS=y, this
results in leaking a timer debug object.

Fixes: bf69bad38cf6 ("futex: Implement sys_futex_waitv()")
Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Reviewed-by: Davidlohr Bueso <dave@stgolabs.net>
Cc: stable@vger.kernel.org
Cc: stable@vger.kernel.org # v5.16+
Link: https://lore.kernel.org/r/20221214222008.200393-1-mathieu.desnoyers@efficios.com
kernel/futex/syscalls.c