From e044273582c7d076382c35324a353d84c0105969 Mon Sep 17 00:00:00 2001 From: "H. Peter Anvin" <hpa@zytor.com> Date: Fri, 2 Mar 2012 10:43:49 -0800 Subject: [PATCH] regset: Return -EFAULT, not -EIO, on host-side memory fault 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 <hpa@zytor.com> Reviewed-by: Oleg Nesterov <oleg@redhat.com> Acked-by: Roland McGrath <roland@hack.frob.com> Cc: <stable@vger.kernel.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org> --- include/linux/regset.h | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/include/linux/regset.h b/include/linux/regset.h index 5150fd16ef93c..686f37327a494 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); } -- 2.39.5