diff mbox series

[03/12] smb: client: fix potential UAF in cifs_stats_proc_write()

Message ID 20240402193404.236159-3-pc@manguebit.com (mailing list archive)
State New, archived
Headers show
Series [01/12] smb: client: fix potential UAF in cifs_debug_files_proc_show() | expand

Commit Message

Paulo Alcantara April 2, 2024, 7:33 p.m. UTC 
Skip sessions that are being teared down (status == SES_EXITING) to
avoid UAF.

Signed-off-by: Paulo Alcantara (Red Hat) <pc@manguebit.com>
---
 fs/smb/client/cifs_debug.c | 2 ++
 1 file changed, 2 insertions(+)
diff mbox series

Patch

diff --git a/fs/smb/client/cifs_debug.c b/fs/smb/client/cifs_debug.c
index c9aec9a38ad3..8535c9907462 100644
--- a/fs/smb/client/cifs_debug.c
+++ b/fs/smb/client/cifs_debug.c
@@ -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);