Skip sessions that are being teared down (status == SES_EXITING) to
avoid UAF.
Signed-off-by: Paulo Alcantara (Red Hat) <pc@xxxxxxxxxxxxx>
---
fs/smb/client/smb2misc.c | 2 ++
1 file changed, 2 insertions(+)
diff --git a/fs/smb/client/smb2misc.c b/fs/smb/client/smb2misc.c
index 14d74ef70cc8..4abbf6545c9c 100644
--- a/fs/smb/client/smb2misc.c
+++ b/fs/smb/client/smb2misc.c
@@ -623,6 +623,8 @@ smb2_is_valid_lease_break(char *buffer, struct TCP_Server_Info *server)
/* look up tcon based on tid & uid */
spin_lock(&cifs_tcp_ses_lock);
list_for_each_entry(ses, &pserver->smb_ses_list, smb_ses_list) {
+ if (cifs_ses_exiting(ses))
+ continue;
list_for_each_entry(tcon, &ses->tcon_list, tcon_list) {
spin_lock(&tcon->open_file_lock);
cifs_stats_inc(
--
2.44.0
