From: Dan Carpenter <dan.carpenter@oracle.com>
Date: Wed, 20 Feb 2013 02:13:32 +0000 (+1100)
Subject: compat: return -EFAULT on error in waitid()
X-Git-Tag: next-20130220~1^2~675
X-Git-Url: https://git.karo-electronics.de/?a=commitdiff_plain;h=2bfe2dccde68387be27578fb188432d9eccd0025;p=karo-tx-linux.git

compat: return -EFAULT on error in waitid()

The copy_to_user() call returns the number of bytes remaining but we want
to return -EFAULT on error.

Fixes "x32: fix waitid()"

Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Cc: Al Viro <viro@zeniv.linux.org.uk>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
---

diff --git a/kernel/compat.c b/kernel/compat.c
index de6f3244d325..19971d8c7299 100644
--- a/kernel/compat.c
+++ b/kernel/compat.c
@@ -593,7 +593,7 @@ COMPAT_SYSCALL_DEFINE5(waitid,
 		else
 			ret = put_compat_rusage(&ru, uru);
 		if (ret)
-			return ret;
+			return -EFAULT;
 	}
 
 	BUG_ON(info.si_code & __SI_MASK);