From: Hiroshi Shimamoto <h-shimamoto@ct.jp.nec.com>
To: Ingo Molnar <mingo@elte.hu>, Thomas Gleixner <tglx@linutronix.de>,
"H. Peter Anvin" <hpa@zytor.com>
Cc: linux-kernel@vger.kernel.org
Subject: [PATCH] x86: uaccess_64: fix return value in __copy_from_user()
Date: Thu, 13 Nov 2008 18:06:04 -0800 [thread overview]
Message-ID: <491CDD0C.60405@ct.jp.nec.com> (raw)
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
next reply other threads:[~2008-11-14 2:06 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2008-11-14 2:06 Hiroshi Shimamoto [this message]
2008-11-18 21:29 ` [PATCH] x86: uaccess_64: fix return value in __copy_from_user() Ingo Molnar
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