From 59463eb88829f646aed13283fd84d02a475334fe Mon Sep 17 00:00:00 2001
From: Aurelien Aptel <aaptel@suse.com>
Date: Thu, 3 Dec 2020 19:46:08 +0100
Subject: [PATCH] cifs: add NULL check for ses->tcon_ipc
In some scenarios (DFS and BAD_NETWORK_NAME) set_root_set() can be
called with a NULL ses->tcon_ipc.
Signed-off-by: Aurelien Aptel <aaptel@suse.com>
Reviewed-by: Paulo Alcantara (SUSE) <pc@cjr.nz>
CC: Stable <stable@vger.kernel.org>
Signed-off-by: Steve French <stfrench@microsoft.com>
---
fs/cifs/connect.c | 3 ++-
1 file changed, 2 insertions(+), 1 deletion(-)
diff --git a/fs/cifs/connect.c b/fs/cifs/connect.c
index 28c1459fb0fc0..44f9cce570995 100644
--- a/fs/cifs/connect.c
+++ b/fs/cifs/connect.c
@@ -4546,7 +4546,8 @@ static void set_root_ses(struct cifs_sb_info *cifs_sb, struct cifs_ses *ses,
if (ses) {
spin_lock(&cifs_tcp_ses_lock);
ses->ses_count++;
- ses->tcon_ipc->remap = cifs_remap(cifs_sb);
+ if (ses->tcon_ipc)
+ ses->tcon_ipc->remap = cifs_remap(cifs_sb);
spin_unlock(&cifs_tcp_ses_lock);
}
*root_ses = ses;
--
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