Commit d3da25c5 authored by Paulo Alcantara's avatar Paulo Alcantara Committed by Steve French
Browse files

smb: client: fix potential UAF in cifs_stats_proc_write() 



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

Cc: stable@vger.kernel.org
Signed-off-by: default avatarPaulo Alcantara (Red Hat) <pc@manguebit.com>
Signed-off-by: default avatarSteve French <stfrench@microsoft.com>
parent 58acd1f4

fs/smb/client/cifs_debug.c

+2 −0
Original line number Diff line number Diff line
@@ -678,6 +678,8 @@ static ssize_t cifs_stats_proc_write(struct file *file, 
			}

#endif /* CONFIG_CIFS_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) {

					atomic_set(&tcon->num_smbs_sent, 0);

					spin_lock(&tcon->stat_lock);