Baptiste Lepers c5102ced8a events: Reuse value read using READ_ONCE instead of re-reading it ... commit b89a05b21f46150ac10a962aa50109250b56b03b upstream. In perf_event_addr_filters_apply, the task associated with the event (event->ctx->task) is read using READ_ONCE at the beginning of the function, checked, and then re-read from event->ctx->task, voiding all guarantees of the checks. Reuse the value that was read by READ_ONCE to ensure the consistency of the task struct throughout the function. Fixes: 375637bc52 ("perf/core: Introduce address range filtering") Signed-off-by: Baptiste Lepers <baptiste.lepers@gmail.com> Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org> Link: https://lkml.kernel.org/r/20210906015310.12802-1-baptiste.lepers@gmail.com Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>		2021-09-22 12:27:57 +02:00
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callchain.c
core.c	events: Reuse value read using READ_ONCE instead of re-reading it	2021-09-22 12:27:57 +02:00
hw_breakpoint.c
internal.h
Makefile
ring_buffer.c
uprobes.c