diff options
| author | Al Viro <viro@zeniv.linux.org.uk> | 2016-08-21 23:39:47 -0400 |
|---|---|---|
| committer | Mister Oyster <oysterized@gmail.com> | 2017-04-11 10:57:57 +0200 |
| commit | 2fbb8a412a78a42e8fde2dcd55711f93a664c37f (patch) | |
| tree | f5862e7eb6ffc8ef06484fe511d47ea4f0a707b6 | |
| parent | 92f61f9c728f617b5d94d6d7230ca9a5b5106c89 (diff) | |
sh: fix copy_from_user()
commit 6e050503a150b2126620c1a1e9b3a368fcd51eac upstream.
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Signed-off-by: Willy Tarreau <w@1wt.eu>
| -rw-r--r-- | arch/sh/include/asm/uaccess.h | 5 |
1 files changed, 4 insertions, 1 deletions
diff --git a/arch/sh/include/asm/uaccess.h b/arch/sh/include/asm/uaccess.h index 948637660..c04cc18ae 100644 --- a/arch/sh/include/asm/uaccess.h +++ b/arch/sh/include/asm/uaccess.h @@ -151,7 +151,10 @@ copy_from_user(void *to, const void __user *from, unsigned long n) __kernel_size_t __copy_size = (__kernel_size_t) n; if (__copy_size && __access_ok(__copy_from, __copy_size)) - return __copy_user(to, from, __copy_size); + __copy_size = __copy_user(to, from, __copy_size); + + if (unlikely(__copy_size)) + memset(to + (n - __copy_size), 0, __copy_size); return __copy_size; } |