]> Git Repo - linux.git/commitdiff
smb: client: fix potential UAF in cifs_signal_cifsd_for_reconnect()
authorPaulo Alcantara <[email protected]>
Tue, 2 Apr 2024 19:34:04 +0000 (16:34 -0300)
committerSteve French <[email protected]>
Wed, 3 Apr 2024 19:45:15 +0000 (14:45 -0500)
Skip sessions that are being teared down (status == SES_EXITING) to
avoid UAF.

Cc: [email protected]
Signed-off-by: Paulo Alcantara (Red Hat) <[email protected]>
Signed-off-by: Steve French <[email protected]>
fs/smb/client/connect.c

index 95e4bda4fd5172c662393fc2787308116679a670..85679ae106fd50a4e3289349e2916204ae3f94fc 100644 (file)
@@ -175,6 +175,8 @@ cifs_signal_cifsd_for_reconnect(struct TCP_Server_Info *server,
 
        spin_lock(&cifs_tcp_ses_lock);
        list_for_each_entry(ses, &pserver->smb_ses_list, smb_ses_list) {
+               if (cifs_ses_exiting(ses))
+                       continue;
                spin_lock(&ses->chan_lock);
                for (i = 0; i < ses->chan_count; i++) {
                        if (!ses->chans[i].server)
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