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

[Osmond Sun <osmond.sun@xxxxxxxxx>]

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@xxxxxxxxx>
---
 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);
 }

-- 
1.9.0
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