linux-kernel - Re: [syzbot] [bluetooth?] BUG: workqueue leaked atomic, lock or RCU: kworker/u9:NUM[NUM]

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Message-Id: <20240711110945.1147-1-hdanton@sina.com>
Date: Thu, 11 Jul 2024 19:09:45 +0800
From: Hillf Danton <hdanton@...a.com>
To: syzbot <syzbot+733a96463546d3026b60@...kaller.appspotmail.com>
Cc: linux-kernel@...r.kernel.org,
	syzkaller-bugs@...glegroups.com
Subject: Re: [syzbot] [bluetooth?] BUG: workqueue leaked atomic, lock or RCU: kworker/u9:NUM[NUM]

On Wed, 10 Jul 2024 16:45:19 -0700
> syzbot has found a reproducer for the following issue on:
> 
> HEAD commit:    ef445d1539dd Merge remote-tracking branches 'origin/arm64-..
> git tree:       git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-kernelci
> C reproducer:   https://syzkaller.appspot.com/x/repro.c?x=176e2c7e980000

#syz test https://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git  for-kernelci

--- x/net/bluetooth/l2cap_core.c
+++ y/net/bluetooth/l2cap_core.c
@@ -6774,6 +6774,7 @@ static void l2cap_conless_channel(struct
 	bt_cb(skb)->l2cap.psm = psm;
 
 	if (!chan->ops->recv(chan, skb)) {
+		l2cap_chan_unlock(chan);
 		l2cap_chan_put(chan);
 		return;
 	}
--