From: Cong Ding <dinggnu@gmail.com>
Date: Wed, 23 Jan 2013 00:20:58 +0000 (-0500)
Subject: fs/cifs/cifs_dfs_ref.c: fix potential memory leakage
X-Git-Tag: firefly_0821_release~3680^2~1201^2
X-Git-Url: http://demsky.eecs.uci.edu/git/?a=commitdiff_plain;h=10b8c7dff5d3633b69e77f57d404dab54ead3787;p=firefly-linux-kernel-4.4.55.git

fs/cifs/cifs_dfs_ref.c: fix potential memory leakage

When it goes to error through line 144, the memory allocated to *devname is
not freed, and the caller doesn't free it either in line 250. So we free the
memroy of *devname in function cifs_compose_mount_options() when it goes to
error.

Signed-off-by: Cong Ding <dinggnu@gmail.com>
CC: stable <stable@kernel.org>
Reviewed-by: Jeff Layton <jlayton@redhat.com>
Signed-off-by: Steve French <smfrench@gmail.com>
---

diff --git a/fs/cifs/cifs_dfs_ref.c b/fs/cifs/cifs_dfs_ref.c
index ce5cbd717bfc..210fce2df308 100644
--- a/fs/cifs/cifs_dfs_ref.c
+++ b/fs/cifs/cifs_dfs_ref.c
@@ -226,6 +226,8 @@ compose_mount_options_out:
 compose_mount_options_err:
 	kfree(mountdata);
 	mountdata = ERR_PTR(rc);
+	kfree(*devname);
+	*devname = NULL;
 	goto compose_mount_options_out;
 }