From e28cc71572da38a5a12c1cfe4d7032017adccf69 Mon Sep 17 00:00:00 2001
From: Linus Torvalds <torvalds@g5.osdl.org>
Date: Wed, 4 Jan 2006 16:20:40 -0800
Subject: Relax the rw_verify_area() error checking.

In particular, allow over-large read- or write-requests to be downgraded
to a more reasonable range, rather than considering them outright errors.

We want to protect lower layers from (the sadly all too common) overflow
conditions, but prefer to do so by chopping the requests up, rather than
just refusing them outright.

Cc: Peter Anvin <hpa@zytor.com>
Cc: Ulrich Drepper <drepper@redhat.com>
Cc: Andi Kleen <ak@suse.de>
Cc: Al Viro <viro@ftp.linux.org.uk>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
---
 fs/compat.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

(limited to 'fs/compat.c')

diff --git a/fs/compat.c b/fs/compat.c
index 818634120b6..55ac0324aaf 100644
--- a/fs/compat.c
+++ b/fs/compat.c
@@ -1170,7 +1170,7 @@ static ssize_t compat_do_readv_writev(int type, struct file *file,
 	}
 
 	ret = rw_verify_area(type, file, pos, tot_len);
-	if (ret)
+	if (ret < 0)
 		goto out;
 
 	fnv = NULL;
-- 
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