ocfs2: silence an integer overflow warning
diff mbox

Message ID 20160707081241.GA16645@mwanda
State New
Headers show

Commit Message

Dan Carpenter July 7, 2016, 8:12 a.m. UTC
My static checker complains that ->me_start + ->me_len can overflow.
I haven't followed it through to see the implications but it seems
simple enough to prevent the overflow.

Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
---
move_extents in other less common file systems have this same warning as
well.

Patch
diff mbox

diff --git a/fs/ocfs2/move_extents.c b/fs/ocfs2/move_extents.c
index e3d05d9..9ff405a 100644
--- a/fs/ocfs2/move_extents.c
+++ b/fs/ocfs2/move_extents.c
@@ -1014,7 +1014,8 @@  int ocfs2_ioctl_move_extents(struct file *filp, void __user *argp)
 		goto out_free;
 	}
 
-	if (range.me_start > i_size_read(inode)) {
+	if (range.me_start > i_size_read(inode) ||
+	    range.me_len > i_size_read(inode)) {
 		status = -EINVAL;
 		goto out_free;
 	}