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

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Message-ID: <20231115203401.2495875-24-iii@linux.ibm.com>
Date:   Wed, 15 Nov 2023 21:30:55 +0100
From:   Ilya Leoshkevich <iii@...ux.ibm.com>
To:     Alexander Gordeev <agordeev@...ux.ibm.com>,
        Alexander Potapenko <glider@...gle.com>,
        Andrew Morton <akpm@...ux-foundation.org>,
        Christoph Lameter <cl@...ux.com>,
        David Rientjes <rientjes@...gle.com>,
        Joonsoo Kim <iamjoonsoo.kim@....com>,
        Marco Elver <elver@...gle.com>,
        Masami Hiramatsu <mhiramat@...nel.org>,
        Pekka Enberg <penberg@...nel.org>,
        Steven Rostedt <rostedt@...dmis.org>,
        Vasily Gorbik <gor@...ux.ibm.com>,
        Vlastimil Babka <vbabka@...e.cz>
Cc:     Christian Borntraeger <borntraeger@...ux.ibm.com>,
        Dmitry Vyukov <dvyukov@...gle.com>,
        Hyeonggon Yoo <42.hyeyoo@...il.com>,
        kasan-dev@...glegroups.com, linux-kernel@...r.kernel.org,
        linux-mm@...ck.org, linux-s390@...r.kernel.org,
        linux-trace-kernel@...r.kernel.org,
        Mark Rutland <mark.rutland@....com>,
        Roman Gushchin <roman.gushchin@...ux.dev>,
        Sven Schnelle <svens@...ux.ibm.com>,
        Ilya Leoshkevich <iii@...ux.ibm.com>
Subject: [PATCH 23/32] s390/checksum: Add a KMSAN check

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@...ux.ibm.com>
Signed-off-by: Ilya Leoshkevich <iii@...ux.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