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Message-ID: <20231121220155.1217090-14-iii@linux.ibm.com>
Date: Tue, 21 Nov 2023 23:01:07 +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>,
Heiko Carstens <hca@...ux.ibm.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 v2 13/33] kmsan: Introduce memset_no_sanitize_memory()
Add a wrapper for memset() that prevents unpoisoning. This is useful
for filling memory allocator redzones.
Signed-off-by: Ilya Leoshkevich <iii@...ux.ibm.com>
---
include/linux/kmsan.h | 9 +++++++++
1 file changed, 9 insertions(+)
diff --git a/include/linux/kmsan.h b/include/linux/kmsan.h
index ff8fd95733fa..439df72c8dc6 100644
--- a/include/linux/kmsan.h
+++ b/include/linux/kmsan.h
@@ -345,4 +345,13 @@ static inline void *kmsan_get_metadata(void *addr, bool is_origin)
#endif
+/**
+ * memset_no_sanitize_memory() - memset() without the KMSAN instrumentation.
+ */
+__no_sanitize_memory
+static inline void *memset_no_sanitize_memory(void *s, int c, size_t n)
+{
+ return memset(s, c, n);
+}
+
#endif /* _LINUX_KMSAN_H */
--
2.41.0
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