FAILED: patch "[PATCH] smb: server: fix leak of active_num_conn in" failed to apply to 5.15-stable tree

[<gregkh@linuxfoundation.org>]

The patch below does not apply to the 5.15-stable tree.
If someone wants it applied there, or to any other stable or longterm
tree, then please email the backport, including the original git commit
id to <stable@vger.kernel.org>.

To reproduce the conflict and resubmit, you may use the following commands:

git fetch https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/ linux-5.15.y
git checkout FETCH_HEAD
git cherry-pick -x 77ffbcac4e569566d0092d5f22627dfc0896b553
# <resolve conflicts, build, test, etc.>
git commit -s
git send-email --to '<stable@vger.kernel.org>' --in-reply-to '2026021306-laurel-scariness-bfee@gregkh' --subject-prefix 'PATCH 5.15.y' HEAD^..

Possible dependencies:



thanks,

greg k-h

------------------ original commit in Linus's tree ------------------

From 77ffbcac4e569566d0092d5f22627dfc0896b553 Mon Sep 17 00:00:00 2001
From: Henrique Carvalho <henrique.carvalho@suse.com>
Date: Wed, 4 Feb 2026 20:06:43 -0300
Subject: [PATCH] smb: server: fix leak of active_num_conn in
 ksmbd_tcp_new_connection()

On kthread_run() failure in ksmbd_tcp_new_connection(), the transport is
freed via free_transport(), which does not decrement active_num_conn,
leaking this counter.

Replace free_transport() with ksmbd_tcp_disconnect().

Fixes: 0d0d4680db22e ("ksmbd: add max connections parameter")
Cc: stable@vger.kernel.org
Signed-off-by: Henrique Carvalho <henrique.carvalho@suse.com>
Acked-by: Namjae Jeon <linkinjeon@kernel.org>
Signed-off-by: Steve French <stfrench@microsoft.com>

diff --git a/fs/smb/server/transport_tcp.c b/fs/smb/server/transport_tcp.c
index 4bb07937d7ef..2436dabada95 100644
--- a/fs/smb/server/transport_tcp.c
+++ b/fs/smb/server/transport_tcp.c
@@ -40,6 +40,7 @@ static const struct ksmbd_transport_ops ksmbd_tcp_transport_ops;
 
 static void tcp_stop_kthread(struct task_struct *kthread);
 static struct interface *alloc_iface(char *ifname);
+static void ksmbd_tcp_disconnect(struct ksmbd_transport *t);
 
 #define KSMBD_TRANS(t)	(&(t)->transport)
 #define TCP_TRANS(t)	((struct tcp_transport *)container_of(t, \
@@ -202,7 +203,7 @@ static int ksmbd_tcp_new_connection(struct socket *client_sk)
 	if (IS_ERR(handler)) {
 		pr_err("cannot start conn thread\n");
 		rc = PTR_ERR(handler);
-		free_transport(t);
+		ksmbd_tcp_disconnect(KSMBD_TRANS(t));
 	}
 	return rc;
 }