Patch "smb: client: fix potential UAF in smb2_is_network_name_deleted()" has been added to the 6.1-stable tree

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This is a note to let you know that I've just added the patch titled

    smb: client: fix potential UAF in smb2_is_network_name_deleted()

to the 6.1-stable tree which can be found at:
    http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary

The filename of the patch is:
     smb-client-fix-potential-uaf-in-smb2_is_network_name_deleted.patch
and it can be found in the queue-6.1 subdirectory.

If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.


>From 63981561ffd2d4987807df4126f96a11e18b0c1d Mon Sep 17 00:00:00 2001
From: Paulo Alcantara <pc@xxxxxxxxxxxxx>
Date: Tue, 2 Apr 2024 16:34:02 -0300
Subject: smb: client: fix potential UAF in smb2_is_network_name_deleted()

From: Paulo Alcantara <pc@xxxxxxxxxxxxx>

commit 63981561ffd2d4987807df4126f96a11e18b0c1d 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/smb2ops.c |    2 ++
 1 file changed, 2 insertions(+)

--- a/fs/smb/client/smb2ops.c
+++ b/fs/smb/client/smb2ops.c
@@ -2437,6 +2437,8 @@ smb2_is_network_name_deleted(char *buf,
 
 	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) {
 			if (tcon->tid == le32_to_cpu(shdr->Id.SyncId.TreeId)) {
 				spin_lock(&tcon->tc_lock);


Patches currently in stable-queue which might be from pc@xxxxxxxxxxxxx are

queue-6.1/smb-client-fix-potential-uaf-in-cifs_stats_proc_write.patch
queue-6.1/smb-client-fix-potential-uaf-in-is_valid_oplock_break.patch
queue-6.1/smb-client-fix-potential-uaf-in-smb2_is_network_name_deleted.patch
queue-6.1/smb-client-fix-potential-uaf-in-cifs_debug_files_proc_show.patch
queue-6.1/smb-client-fix-potential-uaf-in-smb2_is_valid_lease_break.patch
queue-6.1/smb-client-fix-potential-uaf-in-cifs_signal_cifsd_for_reconnect.patch
queue-6.1/smb-client-fix-potential-uaf-in-cifs_stats_proc_show.patch
queue-6.1/smb-client-fix-potential-uaf-in-smb2_is_valid_oplock_break.patch




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