From: Nick Hu <nickhu@andestech.com>
To: <aryabinin@virtuozzo.com>, <glider@google.com>,
<dvyukov@google.com>, <corbet@lwn.net>,
<paul.walmsley@sifive.com>, <palmer@sifive.com>,
<aou@eecs.berkeley.edu>, <tglx@linutronix.de>,
<gregkh@linuxfoundation.org>, <alankao@andestech.com>,
<Anup.Patel@wdc.com>, <atish.patra@wdc.com>,
<kasan-dev@googlegroups.com>, <linux-doc@vger.kernel.org>,
<linux-kernel@vger.kernel.org>, <linux-riscv@lists.infradead.org>,
<linux-mm@kvack.org>, <green.hu@gmail.com>
Cc: Nick Hu <nickhu@andestech.com>
Subject: [PATCH v4 1/3] kasan: No KASAN's memmove check if archs don't have it.
Date: Mon, 28 Oct 2019 10:40:59 +0800 [thread overview]
Message-ID: <20191028024101.26655-2-nickhu@andestech.com> (raw)
In-Reply-To: <20191028024101.26655-1-nickhu@andestech.com>
If archs don't have memmove then the C implementation from lib/string.c is used,
and then it's instrumented by compiler. So there is no need to add KASAN's
memmove to manual checks.
Signed-off-by: Nick Hu <nickhu@andestech.com>
---
mm/kasan/common.c | 2 ++
1 file changed, 2 insertions(+)
diff --git a/mm/kasan/common.c b/mm/kasan/common.c
index 6814d6d6a023..897f9520bab3 100644
--- a/mm/kasan/common.c
+++ b/mm/kasan/common.c
@@ -107,6 +107,7 @@ void *memset(void *addr, int c, size_t len)
return __memset(addr, c, len);
}
+#ifdef __HAVE_ARCH_MEMMOVE
#undef memmove
void *memmove(void *dest, const void *src, size_t len)
{
@@ -115,6 +116,7 @@ void *memmove(void *dest, const void *src, size_t len)
return __memmove(dest, src, len);
}
+#endif
#undef memcpy
void *memcpy(void *dest, const void *src, size_t len)
--
2.17.0
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next prev parent reply other threads:[~2019-10-28 2:42 UTC|newest]
Thread overview: 8+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-10-28 2:40 [PATCH v4 0/3] KASAN support for RISC-V Nick Hu
2019-10-28 2:40 ` Nick Hu [this message]
2019-11-17 4:57 ` [PATCH v4 1/3] kasan: No KASAN's memmove check if archs don't have it Paul Walmsley
2019-11-18 8:41 ` Dmitry Vyukov
2019-11-18 16:22 ` Andrey Ryabinin
2019-10-28 2:41 ` [PATCH v4 2/3] riscv: Add KASAN support Nick Hu
2019-10-28 2:41 ` [PATCH v4 3/3] kasan: Add riscv to KASAN documentation Nick Hu
2019-10-28 7:01 ` [PATCH v4 0/3] KASAN support for RISC-V Greentime Hu
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