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Diffstat (limited to 'arch/parisc/include/asm/uaccess.h')
-rw-r--r--arch/parisc/include/asm/uaccess.h5
1 files changed, 4 insertions, 1 deletions
diff --git a/arch/parisc/include/asm/uaccess.h b/arch/parisc/include/asm/uaccess.h
index e9150487e20d..482847865dac 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
@@ -221,7 +222,7 @@ 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 || sz >= n))
ret = __copy_from_user(to, from, n);
@@ -230,6 +231,8 @@ static inline unsigned long __must_check copy_from_user(void *to,
else
__bad_copy_user();
+ if (unlikely(ret))
+ memset(to + (n - ret), 0, ret);
return ret;
}