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Subject[PATCH] x86: uaccess_64: fix return value in __copy_from_user()
From: Hiroshi Shimamoto <h-shimamoto@ct.jp.nec.com>

__copy_from_user() will return invalid value 16 when it fails to
access user space and the size is 10.

Signed-off-by: Hiroshi Shimamoto <h-shimamoto@ct.jp.nec.com>
---
arch/x86/include/asm/uaccess_64.h | 2 +-
1 files changed, 1 insertions(+), 1 deletions(-)

diff --git a/arch/x86/include/asm/uaccess_64.h b/arch/x86/include/asm/uaccess_64.h
index 543ba88..84210c4 100644
--- a/arch/x86/include/asm/uaccess_64.h
+++ b/arch/x86/include/asm/uaccess_64.h
@@ -48,7 +48,7 @@ int __copy_from_user(void *dst, const void __user *src, unsigned size)
return ret;
case 10:
__get_user_asm(*(u64 *)dst, (u64 __user *)src,
- ret, "q", "", "=r", 16);
+ ret, "q", "", "=r", 10);
if (unlikely(ret))
return ret;
__get_user_asm(*(u16 *)(8 + (char *)dst),
--
1.5.6


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