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coresight: trbe: Prevent overflow in PERF_IDX2OFF()

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[ Upstream commit 105f56877f2d5f82d71e20b45eb7be7c24c3d908 ]

Cast nr_pages to unsigned long to avoid overflow when handling large
AUX buffer sizes (>= 2 GiB).

Fixes: 3fbf7f011f ("coresight: sink: Add TRBE driver")
Signed-off-by: Leo Yan <leo.yan@arm.com>
Signed-off-by: Will Deacon <will@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
This commit is contained in:
Leo Yan 2025-09-17 18:41:38 +01:00 committed by Greg Kroah-Hartman
parent 583f690401
commit e7143a65f6
1 changed files with 2 additions and 1 deletions
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3
drivers/hwtracing/coresight/coresight-trbe.c
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@ -21,7 +21,8 @@
#include "coresight-self-hosted-trace.h"
#include "coresight-trbe.h"
#define PERF_IDX2OFF(idx, buf) ((idx) % ((buf)->nr_pages << PAGE_SHIFT))
#define PERF_IDX2OFF(idx, buf) \
((idx) % ((unsigned long)(buf)->nr_pages << PAGE_SHIFT))
/*
* A padding packet that will help the user space tools