Peter Zijlstra c9bc1753b3 perf: Fix __perf_event_overflow() vs perf_remove_from_context() race ...

Make sure that __perf_event_overflow() runs with IRQs disabled for all
possible callchains. Specifically the software events can end up running
it with only preemption disabled.

This opens up a race vs perf_event_exit_event() and friends that will go
and free various things the overflow path expects to be present, like
the BPF program.

Fixes: 592903cdcb ("perf_counter: add an event_list")
Reported-by: Simond Hu <cmdhh1767@gmail.com>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Tested-by: Simond Hu <cmdhh1767@gmail.com>
Link: https://patch.msgid.link/20260224122909.GV1395416@noisy.programming.kicks-ass.net

2026-02-25 15:02:34 +01:00

..

callchain.c

perf: sched: Fix perf crash with new is_user_task() helper

2026-01-30 23:06:07 +01:00

core.c

perf: Fix __perf_event_overflow() vs perf_remove_from_context() race

2026-02-25 15:02:34 +01:00

hw_breakpoint_test.c

…

hw_breakpoint.c

Convert remaining multi-line kmalloc_obj/flex GFP_KERNEL uses

2026-02-22 08:26:33 -08:00

internal.h

perf: Convert mmap() refcounts to refcount_t

2025-08-15 13:13:02 +02:00

Makefile

…

ring_buffer.c

treewide: Update email address

2026-01-11 06:09:11 -10:00

uprobes.c

Convert 'alloc_obj' family to use the new default GFP_KERNEL argument

2026-02-21 17:09:51 -08:00