This is a note to let you know that I've just added the patch titled
regset: Return -EFAULT, not -EIO, on host-side memory fault
to the 3.0-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
regset-return-efault-not-eio-on-host-side-memory-fault.patch
and it can be found in the queue-3.0 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <[email protected]> know about it.
>From 5189fa19a4b2b4c3bec37c3a019d446148827717 Mon Sep 17 00:00:00 2001
From: "H. Peter Anvin" <[email protected]>
Date: Fri, 2 Mar 2012 10:43:49 -0800
Subject: regset: Return -EFAULT, not -EIO, on host-side memory fault
From: "H. Peter Anvin" <[email protected]>
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 <[email protected]>
Reviewed-by: Oleg Nesterov <[email protected]>
Acked-by: Roland McGrath <[email protected]>
Signed-off-by: Linus Torvalds <[email protected]>
Signed-off-by: Greg Kroah-Hartman <[email protected]>
---
include/linux/regset.h | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)
--- a/include/linux/regset.h
+++ b/include/linux/regset.h
@@ -339,7 +339,7 @@ static inline int copy_regset_to_user(st
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(
return -EOPNOTSUPP;
if (!access_ok(VERIFY_READ, data, size))
- return -EIO;
+ return -EFAULT;
return regset->set(target, regset, offset, size, NULL, data);
}
Patches currently in stable-queue which might be from [email protected] are
queue-3.0/regset-prevent-null-pointer-reference-on-readonly-regsets.patch
queue-3.0/regset-return-efault-not-eio-on-host-side-memory-fault.patch
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