[PATCH 5.10 054/352] perf: Fix perf_aux_size() for greater-than 32-bit size

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5.10-stable review patch.  If anyone has any objections, please let me know.

------------------

From: Adrian Hunter <adrian.hunter@xxxxxxxxx>

[ Upstream commit 3df94a5b1078dfe2b0c03f027d018800faf44c82 ]

perf_buffer->aux_nr_pages uses a 32-bit type, so a cast is needed to
calculate a 64-bit size.

Fixes: 45bfb2e50471 ("perf: Add AUX area to ring buffer for raw data streams")
Signed-off-by: Adrian Hunter <adrian.hunter@xxxxxxxxx>
Signed-off-by: Peter Zijlstra (Intel) <peterz@xxxxxxxxxxxxx>
Link: https://lore.kernel.org/r/20240624201101.60186-5-adrian.hunter@xxxxxxxxx
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
---
 kernel/events/internal.h | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/kernel/events/internal.h b/kernel/events/internal.h
index aa23ffdaf819f..8e63cc2bd4f7d 100644
--- a/kernel/events/internal.h
+++ b/kernel/events/internal.h
@@ -128,7 +128,7 @@ static inline unsigned long perf_data_size(struct perf_buffer *rb)
 
 static inline unsigned long perf_aux_size(struct perf_buffer *rb)
 {
-	return rb->aux_nr_pages << PAGE_SHIFT;
+	return (unsigned long)rb->aux_nr_pages << PAGE_SHIFT;
 }
 
 #define __DEFINE_OUTPUT_COPY_BODY(advance_buf, memcpy_func, ...)	\
-- 
2.43.0







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