[PATCH] cifs: set null to username and iocharset after being freed

[Osmond Sun]

In function 'expand_dfs_referral' the volume_info->iocharset and
volume_info->username was used after being freed by calling
cleanup_volume_info_contents. Set null to username and iocharset
after being freed.

Signed-off-by: Osmond Sun <osmond.sun-***@public.gmane.org>
---
fs/cifs/connect.c | 2 ++
1 file changed, 2 insertions(+)

diff --git a/fs/cifs/connect.c b/fs/cifs/connect.c
index 20d75b8..2586a34 100644
--- a/fs/cifs/connect.c
+++ b/fs/cifs/connect.c
@@ -3251,10 +3251,12 @@ static void
cleanup_volume_info_contents(struct smb_vol *volume_info)
{
kfree(volume_info->username);
+ volume_info->username = NULL;
kzfree(volume_info->password);
kfree(volume_info->UNC);
kfree(volume_info->domainname);
kfree(volume_info->iocharset);
+ volume_info->iocharset = NULL;
kfree(volume_info->prepath);
}