From: Dan Carpenter <dan.carpenter@oracle.com>
Date: Fri, 22 Feb 2013 00:41:57 +0000 (-0800)
Subject: compat: return -EFAULT on error in waitid()
X-Git-Url: http://drtracing.org/?a=commitdiff_plain;h=bffea77c08c361d174af7ad94887f6aecc3f340b;p=deliverable%2Flinux.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>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
---

diff --git a/kernel/compat.c b/kernel/compat.c
index 36700e9e2be9..f4bddb900186 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);