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| author | Al Viro <viro@zeniv.linux.org.uk> | 2016-08-21 02:03:37 +0300 |
|---|---|---|
| committer | Al Viro <viro@zeniv.linux.org.uk> | 2016-09-14 00:49:44 +0300 |
| commit | aace880feea38875fbc919761b77e5732a3659ef (patch) | |
| tree | 90659c81f82e944ffdaff5978dcdaee83c962b48 | |
| parent | acb2505d0119033a80c85ac8d02dccae41271667 (diff) | |
| download | linux-aace880feea38875fbc919761b77e5732a3659ef.tar.xz | |
parisc: fix copy_from_user()
Cc: stable@vger.kernel.org
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
| -rw-r--r-- | arch/parisc/include/asm/uaccess.h | 6 |
1 files changed, 4 insertions, 2 deletions
diff --git a/arch/parisc/include/asm/uaccess.h b/arch/parisc/include/asm/uaccess.h index 0f59fd9ca205..37a1bee96444 100644 --- a/arch/parisc/include/asm/uaccess.h +++ b/arch/parisc/include/asm/uaccess.h @@ -10,6 +10,7 @@ #include <asm-generic/uaccess-unaligned.h> #include <linux/bug.h> +#include <linux/string.h> #define VERIFY_READ 0 #define VERIFY_WRITE 1 @@ -221,13 +222,14 @@ static inline unsigned long __must_check copy_from_user(void *to, unsigned long n) { int sz = __compiletime_object_size(to); - int ret = -EFAULT; + unsigned long ret = n; if (likely(sz == -1 || !__builtin_constant_p(n) || sz >= n)) ret = __copy_from_user(to, from, n); else copy_from_user_overflow(); - + if (unlikely(ret)) + memset(to + (n - ret), 0, ret); return ret; } |