From a2a3b39824e152ecf0e7357ccc7b9d6fd4b9fe7e Mon Sep 17 00:00:00 2001
From: Tariq Saeed <tariq.x.saeed@oracle.com>
Date: Tue, 21 Jan 2014 15:48:38 -0800
Subject: [PATCH] ocfs2: punch hole should return EINVAL if the length argument
 in ioctl is negative

An unreserve space ioctl OCFS2_IOC_UNRESVSP/64 should reject a negative
length.

Orabug:14789508

Signed-off-by: Tariq Saseed <tariq.x.saeed@oracle.com>
Signed-off-by: Srinivas Eeda <srinivas.eeda@oracle.com>
Cc: Joel Becker <jlbec@evilplan.org>
Cc: Mark Fasheh <mfasheh@suse.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
---
 fs/ocfs2/file.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/fs/ocfs2/file.c b/fs/ocfs2/file.c
index 6fff128cad16..f42eecef6478 100644
--- a/fs/ocfs2/file.c
+++ b/fs/ocfs2/file.c
@@ -1869,7 +1869,8 @@ static int __ocfs2_change_file_space(struct file *file, struct inode *inode,
 	}
 	size = sr->l_start + sr->l_len;
 
-	if (cmd == OCFS2_IOC_RESVSP || cmd == OCFS2_IOC_RESVSP64) {
+	if (cmd == OCFS2_IOC_RESVSP || cmd == OCFS2_IOC_RESVSP64 ||
+	    cmd == OCFS2_IOC_UNRESVSP || cmd == OCFS2_IOC_UNRESVSP64) {
 		if (sr->l_len <= 0) {
 			ret = -EINVAL;
 			goto out_inode_unlock;
-- 
2.30.2