From patchwork Wed Jul 31 09:19:36 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Dmitry Antipov X-Patchwork-Id: 816132 Received: from forward103a.mail.yandex.net (forward103a.mail.yandex.net [178.154.239.86]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 3A0271A4B47 for ; Wed, 31 Jul 2024 09:20:33 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=178.154.239.86 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1722417638; cv=none; b=CHZf5f9UCCYkZkGSxEQKxmbeYFzGYnA4nZzjD2Wu+xR25jxmTwfF7X3Q7K3iT0DMi2YidEjbBSJLn6WytlrWR8t9VIbhHg4qLxzDg88MnoJMrGPWx++eIZdQY5wBi5p8lQ1uG2Lh9KVV4ulwM6B6T+TKVR32adk7cNrAgA/UE/w= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1722417638; c=relaxed/simple; bh=fqVROj36jGgnAplYULAM7G8uPL8WqevDHmipsFVRm0k=; h=From:To:Cc:Subject:Date:Message-ID:MIME-Version; b=X4IGmLtZV5acy/O2NAkEzfLuCWFB0ONUVViLsEHK7TsbATVJbAal/fN2fMOKN6vBAM9S/EpNRykAHH0fEuOspt+cWYjIffMwFk5Z0brcRLMz2D8uFHCAYe9emGmoyVe6ussEpgAZFyndATaiN14kQ8RVKaAPoV84OaVbESWYkts= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=yandex.ru; spf=pass smtp.mailfrom=yandex.ru; dkim=pass (1024-bit key) header.d=yandex.ru header.i=@yandex.ru header.b=IvyDcI5m; arc=none smtp.client-ip=178.154.239.86 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=yandex.ru Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=yandex.ru Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=yandex.ru header.i=@yandex.ru header.b="IvyDcI5m" Received: from mail-nwsmtp-smtp-production-main-39.vla.yp-c.yandex.net (mail-nwsmtp-smtp-production-main-39.vla.yp-c.yandex.net [IPv6:2a02:6b8:c2a:89:0:640:35fc:0]) by forward103a.mail.yandex.net (Yandex) with ESMTPS id 7E9B960AB6; Wed, 31 Jul 2024 12:20:31 +0300 (MSK) Received: by mail-nwsmtp-smtp-production-main-39.vla.yp-c.yandex.net (smtp/Yandex) with ESMTPSA id UKSsc0Bb6Gk0-uUAMZLTF; Wed, 31 Jul 2024 12:20:30 +0300 X-Yandex-Fwd: 1 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=yandex.ru; s=mail; t=1722417631; bh=Se8pRohnsZdUKGnnNceppDXZLmaJGsTOrz2Vx6yixCo=; h=Message-ID:Date:Cc:Subject:To:From; b=IvyDcI5mqRiBCD/r7GwVvsDMqTrb3hsERRFfEw3vwAO5mZ4Dv8EOOYWiHCrH0o6H4 WRxvx1shs+vVpA2It60tzLDsvYDR1Kvmekp1j6Mymm/N0+UpvL2LM5xcCQnkg1AXHL X8CutYvdLLRycRJiNxPIj3YPdkmxyPqBT19Jmykg= Authentication-Results: mail-nwsmtp-smtp-production-main-39.vla.yp-c.yandex.net; dkim=pass header.i=@yandex.ru From: Dmitry Antipov To: Luiz Augusto von Dentz Cc: linux-bluetooth@vger.kernel.org, lvc-project@linuxtesting.org, Dmitry Antipov , syzbot+45ac74737e866894acb0@syzkaller.appspotmail.com Subject: [PATCH] Bluetooth: l2cap: always unlock channel in l2cap_conless_channel() Date: Wed, 31 Jul 2024 12:19:36 +0300 Message-ID: <20240731091936.476484-1-dmantipov@yandex.ru> X-Mailer: git-send-email 2.45.2 Precedence: bulk X-Mailing-List: linux-bluetooth@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Add missing call to 'l2cap_chan_unlock()' on receive error handling path in 'l2cap_conless_channel()'. Fixes: a24cce144b98 ("Bluetooth: Fix reference counting of global L2CAP channels") Reported-by: syzbot+45ac74737e866894acb0@syzkaller.appspotmail.com Closes: https://syzkaller.appspot.com/bug?extid=45ac74737e866894acb0 Signed-off-by: Dmitry Antipov --- net/bluetooth/l2cap_core.c | 1 + 1 file changed, 1 insertion(+) diff --git a/net/bluetooth/l2cap_core.c b/net/bluetooth/l2cap_core.c index c3c26bbb5dda..9988ba382b68 100644 --- a/net/bluetooth/l2cap_core.c +++ b/net/bluetooth/l2cap_core.c @@ -6774,6 +6774,7 @@ static void l2cap_conless_channel(struct l2cap_conn *conn, __le16 psm, bt_cb(skb)->l2cap.psm = psm; if (!chan->ops->recv(chan, skb)) { + l2cap_chan_unlock(chan); l2cap_chan_put(chan); return; }