From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Message-Id: <20120312002046.403300238@1wt.eu> Date: Mon, 12 Mar 2012 01:20:56 +0100 From: Willy Tarreau To: linux-kernel@vger.kernel.org, stable@vger.kernel.org Cc: "H. Peter Anvin" , Roland McGrath , Linus Torvalds Subject: [ 11/12] regset: Return -EFAULT, not -EIO, on host-side memory fault In-Reply-To: Sender: linux-kernel-owner@vger.kernel.org List-ID: 2.6.32-longterm review patch. If anyone has any objections, please let me know. ------------------ From: H. Peter Anvin commit 5189fa19a4b2b4c3bec37c3a019d446148827717 upstream. There is only one error code to return for a bad user-space buffer pointer passed to a system call in the same address space as the system call is executed, and that is EFAULT. Furthermore, the low-level access routines, which catch most of the faults, return EFAULT already. Signed-off-by: H. Peter Anvin Reviewed-by: Oleg Nesterov Acked-by: Roland McGrath Cc: Signed-off-by: Linus Torvalds diff --git a/include/linux/regset.h b/include/linux/regset.h index 5150fd1..686f373 100644 --- a/include/linux/regset.h +++ b/include/linux/regset.h @@ -339,7 +339,7 @@ static inline int copy_regset_to_user(struct task_struct *target, return -EOPNOTSUPP; if (!access_ok(VERIFY_WRITE, data, size)) - return -EIO; + return -EFAULT; return regset->get(target, regset, offset, size, NULL, data); } @@ -365,7 +365,7 @@ static inline int copy_regset_from_user(struct task_struct *target, return -EOPNOTSUPP; if (!access_ok(VERIFY_READ, data, size)) - return -EIO; + return -EFAULT; return regset->set(target, regset, offset, size, NULL, data); }