[PATCH 23/32] s390/checksum: Add a KMSAN check

Ilya Leoshkevich
2023-11-15T20:36:43Z

Add a KMSAN check to the CKSM inline assembly, similar to how it was
done for ASAN in commit e42ac7789df6 ("s390/checksum: always use cksm
instruction").

Acked-by: Alexander Gordeev <agordeev@linux.ibm.com>
Signed-off-by: Ilya Leoshkevich <iii@linux.ibm.com>
---
arch/s390/include/asm/checksum.h | 2 ++
1 file changed, 2 insertions(+)

diff --git a/arch/s390/include/asm/checksum.h b/arch/s390/include/asm/checksum.h
index 69837eec2ff5..55ba0ddd8eab 100644
--- a/arch/s390/include/asm/checksum.h
+++ b/arch/s390/include/asm/checksum.h
@@ -13,6 +13,7 @@
#define _S390_CHECKSUM_H

#include <linux/kasan-checks.h>
+#include <linux/kmsan-checks.h>
#include <linux/in6.h>

/*
@@ -35,6 +36,7 @@ static inline __wsum csum_partial(const void *buff, int len, __wsum sum)
};

kasan_check_read(buff, len);
+ kmsan_check_memory(buff, len);
asm volatile(
"0: cksm %[sum],%[rp]\n"
" jo 0b\n"
--
2.41.0