From: Max Filippov <jcmvbkbc@gmail.com>
To: linux-xtensa@linux-xtensa.org
Cc: Chris Zankel <chris@zankel.net>,
linux-kernel@vger.kernel.org, Max Filippov <jcmvbkbc@gmail.com>,
Al Viro <viro@zeniv.linux.org.uk>
Subject: [PATCH] xtensa: fix access check in csum_and_copy_from_user
Date: Tue, 21 Jul 2020 15:00:35 -0700 [thread overview]
Message-ID: <20200721220035.32584-1-jcmvbkbc@gmail.com> (raw)
Commit d341659f470b ("xtensa: switch to providing
csum_and_copy_from_user()") introduced access check, but incorrectly
tested dst instead of src.
Fix access_ok argument in csum_and_copy_from_user.
Cc: Al Viro <viro@zeniv.linux.org.uk>
Fixes: d341659f470b ("xtensa: switch to providing csum_and_copy_from_user()")
Signed-off-by: Max Filippov <jcmvbkbc@gmail.com>
---
arch/xtensa/include/asm/checksum.h | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/arch/xtensa/include/asm/checksum.h b/arch/xtensa/include/asm/checksum.h
index d8292cc9ebdf..243a5fe79d3c 100644
--- a/arch/xtensa/include/asm/checksum.h
+++ b/arch/xtensa/include/asm/checksum.h
@@ -57,7 +57,7 @@ static inline
__wsum csum_and_copy_from_user(const void __user *src, void *dst,
int len, __wsum sum, int *err_ptr)
{
- if (access_ok(dst, len))
+ if (access_ok(src, len))
return csum_partial_copy_generic((__force const void *)src, dst,
len, sum, err_ptr, NULL);
if (len)
--
2.20.1
next reply other threads:[~2020-07-21 22:01 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-07-21 22:00 Max Filippov [this message]
2020-07-21 23:04 ` [PATCH] xtensa: fix access check in csum_and_copy_from_user Al Viro
2020-07-22 3:53 ` Max Filippov
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