fs/smb/client: Reset password pointer to NULL

Forget to reset ctx->password to NULL will lead to bug like double free

Cc: [email protected]
Cc: Willy Tarreau <[email protected]>
Reviewed-by: Namjae Jeon <[email protected]>
Signed-off-by: Quang Le <[email protected]>
Signed-off-by: Steve French <[email protected]>

Author: quanglex97

fs/smb/client/fs_context.c

@@ -1541,6 +1541,7 @@ static int smb3_fs_context_parse_param(struct fs_context *fc,
 
  cifs_parse_mount_err:
 	kfree_sensitive(ctx->password);
+	ctx->password = NULL;
 	return -EINVAL;
 }