diff options
| author | Al Viro <viro@zeniv.linux.org.uk> | 2016-08-20 19:03:37 -0400 |
|---|---|---|
| committer | Ben Hutchings <ben@decadent.org.uk> | 2016-11-20 01:01:39 +0000 |
| commit | 843b3708161cec9073aad1c7b7a09770fa552fec (patch) | |
| tree | 41ec40cfb91c596576b503ac0ec019bd6864ea3f | |
| parent | 6882b9a54f40f23f8b10f5b7df411cad3b52c5a7 (diff) | |
| download | lwn-843b3708161cec9073aad1c7b7a09770fa552fec.tar.gz lwn-843b3708161cec9073aad1c7b7a09770fa552fec.zip | |
parisc: fix copy_from_user()
commit aace880feea38875fbc919761b77e5732a3659ef upstream.
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
[bwh: Backported to 3.2: adjust context]
Signed-off-by: Ben Hutchings <ben@decadent.org.uk>
| -rw-r--r-- | arch/parisc/include/asm/uaccess.h | 7 |
1 files changed, 5 insertions, 2 deletions
diff --git a/arch/parisc/include/asm/uaccess.h b/arch/parisc/include/asm/uaccess.h index 337353de237b..a615403907a2 100644 --- a/arch/parisc/include/asm/uaccess.h +++ b/arch/parisc/include/asm/uaccess.h @@ -10,6 +10,8 @@ #include <asm/errno.h> #include <asm-generic/uaccess-unaligned.h> +#include <linux/string.h> + #define VERIFY_READ 0 #define VERIFY_WRITE 1 @@ -255,13 +257,14 @@ 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; } |