perf: Fix perf_event_validate_size()

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Budimir noted that perf_event_validate_size() only checks the size of
the newly added event, even though the sizes of all existing events
can also change due to not all events having the same read_format.

When we attach the new event, perf_group_attach(), we do re-compute
the size for all events.

Fixes: a723968c0e ("perf: Fix u16 overflows")
Reported-by: Budimir Markovic <markovicbudimir@gmail.com>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>

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Peter Zijlstra 2023-11-29 15:24:52 +01:00

parent 2cc14f52ae

commit 382c27f4ed

1 changed files with 38 additions and 23 deletions

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61

kernel/events/core.c

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