From 23324407143dd923660378fd9b40b9a711972269 Mon Sep 17 00:00:00 2001 From: Paulo Alcantara Date: Tue, 20 Nov 2018 14:37:18 -0200 Subject: cifs: Only free DFS target list if we actually got one Fix potential NULL ptr deref when DFS target list is empty. Signed-off-by: Paulo Alcantara Reviewed-by: Aurelien Aptel Signed-off-by: Steve French --- fs/cifs/connect.c | 6 +++--- 1 file changed, 3 insertions(+), 3 deletions(-) (limited to 'fs') diff --git a/fs/cifs/connect.c b/fs/cifs/connect.c index ec2498f6773e..80ef165d5f33 100644 --- a/fs/cifs/connect.c +++ b/fs/cifs/connect.c @@ -452,8 +452,8 @@ cifs_reconnect(struct TCP_Server_Info *server) struct mid_q_entry *mid_entry; struct list_head retry_list; #ifdef CONFIG_CIFS_DFS_UPCALL - struct cifs_sb_info *cifs_sb; - struct dfs_cache_tgt_list tgt_list; + struct cifs_sb_info *cifs_sb = NULL; + struct dfs_cache_tgt_list tgt_list = {0}; struct dfs_cache_tgt_iterator *tgt_it = NULL; #endif @@ -592,8 +592,8 @@ cifs_reconnect(struct TCP_Server_Info *server) cifs_dbg(VFS, "%s: failed to update vol info in DFS cache: rc = %d\n", __func__, rc); } + dfs_cache_free_tgts(&tgt_list); } - dfs_cache_free_tgts(&tgt_list); #endif if (server->tcpStatus == CifsNeedNegotiate) mod_delayed_work(cifsiod_wq, &server->echo, 0); -- cgit v1.2.3