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perf/x86: Annotate struct bts_buffer::buf with __counted_by()

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Add the __counted_by() compiler attribute to the flexible array member
buf to improve access bounds-checking via CONFIG_UBSAN_BOUNDS and
CONFIG_FORTIFY_SOURCE.

No functional changes intended.

Signed-off-by: Thorsten Blum <thorsten.blum@linux.dev>
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Link: https://lore.kernel.org/r/20250305123134.215577-2-thorsten.blum@linux.dev
This commit is contained in:
Thorsten Blum
2025-03-05 13:31:34 +01:00
committed by Ingo Molnar
parent da02f54e81
commit 5e7adc81ae
1 changed files with 1 additions and 1 deletions
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arch/x86/events/intel/bts.c
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@@ -58,7 +58,7 @@ struct bts_buffer {
local_t head;
unsigned long end;
void **data_pages;
struct bts_phys buf[];
struct bts_phys buf[] __counted_by(nr_bufs);
};
static struct pmu bts_pmu;