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History

Baptiste Lepers b89a05b21f events: Reuse value read using READ_ONCE instead of re-reading it

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: 375637bc52495 ("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

2021-09-15 17:49:06 +02:00

callchain.c

uaccess: add force_uaccess_{begin,end} helpers

2020-08-12 10:57:59 -07:00

core.c

events: Reuse value read using READ_ONCE instead of re-reading it

2021-09-15 17:49:06 +02:00

hw_breakpoint.c

perf/hw_breakpoint: Replace deprecated CPU-hotplug functions

2021-08-26 09:14:36 +02:00

internal.h

perf: Optimize get_recursion_context()