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Message-ID: <491CDD0C.60405@ct.jp.nec.com> Date: Thu, 13 Nov 2008 18:06:04 -0800 From: Hiroshi Shimamoto <h-shimamoto@...jp.nec.com> To: Ingo Molnar <mingo@...e.hu>, Thomas Gleixner <tglx@...utronix.de>, "H. Peter Anvin" <hpa@...or.com> Cc: linux-kernel@...r.kernel.org Subject: [PATCH] x86: uaccess_64: fix return value in __copy_from_user() From: Hiroshi Shimamoto <h-shimamoto@...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@...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 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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