This is a note to let you know that I've just added the patch titled
perf: Fix perf_aux_size() for greater-than 32-bit size
to the 4.19-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
perf-fix-perf_aux_size-for-greater-than-32-bit-size.patch
and it can be found in the queue-4.19 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
commit 6ad2c0a15a5ed2f5b3b790fa739c729bd626a93c
Author: Adrian Hunter <adrian.hunter@xxxxxxxxx>
Date: Mon Jun 24 23:10:58 2024 +0300
perf: Fix perf_aux_size() for greater-than 32-bit size
[ 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>
diff --git a/kernel/events/internal.h b/kernel/events/internal.h
index 8fc0ddc38cb69..a99713a883e9d 100644
--- a/kernel/events/internal.h
+++ b/kernel/events/internal.h
@@ -121,7 +121,7 @@ static inline unsigned long perf_data_size(struct ring_buffer *rb)
static inline unsigned long perf_aux_size(struct ring_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, ...) \
