[PATCH 6.1 128/138] smb: client: fix potential UAF in cifs_stats_proc_show()

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6.1-stable review patch.  If anyone has any objections, please let me know.

------------------

From: Paulo Alcantara <pc@xxxxxxxxxxxxx>

commit 0865ffefea197b437ba78b5dd8d8e256253efd65 upstream.

Skip sessions that are being teared down (status == SES_EXITING) to
avoid UAF.

Cc: stable@xxxxxxxxxxxxxxx
Signed-off-by: Paulo Alcantara (Red Hat) <pc@xxxxxxxxxxxxx>
Signed-off-by: Steve French <stfrench@xxxxxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
 fs/smb/client/cifs_debug.c |    2 ++
 1 file changed, 2 insertions(+)

--- a/fs/smb/client/cifs_debug.c
+++ b/fs/smb/client/cifs_debug.c
@@ -648,6 +648,8 @@ static int cifs_stats_proc_show(struct s
 			}
 #endif /* STATS2 */
 		list_for_each_entry(ses, &server->smb_ses_list, smb_ses_list) {
+			if (cifs_ses_exiting(ses))
+				continue;
 			list_for_each_entry(tcon, &ses->tcon_list, tcon_list) {
 				i++;
 				seq_printf(m, "\n%d) %s", i, tcon->tree_name);






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