From 105f56877f2d5f82d71e20b45eb7be7c24c3d908 Mon Sep 17 00:00:00 2001 From: Leo Yan Date: Wed, 17 Sep 2025 18:41:38 +0100 Subject: [PATCH] coresight: trbe: Prevent overflow in PERF_IDX2OFF() Cast nr_pages to unsigned long to avoid overflow when handling large AUX buffer sizes (>= 2 GiB). Fixes: 3fbf7f011f24 ("coresight: sink: Add TRBE driver") Signed-off-by: Leo Yan Signed-off-by: Will Deacon --- drivers/hwtracing/coresight/coresight-trbe.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) diff --git a/drivers/hwtracing/coresight/coresight-trbe.c b/drivers/hwtracing/coresight/coresight-trbe.c index 8267dd1a2130d..8f426f94e32a1 100644 --- a/drivers/hwtracing/coresight/coresight-trbe.c +++ b/drivers/hwtracing/coresight/coresight-trbe.c @@ -23,7 +23,8 @@ #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 -- 2.47.3