From patchwork Thu May 20 09:22:13 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Greg Kroah-Hartman X-Patchwork-Id: 444219 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-19.1 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_CR_TRAILER, INCLUDES_PATCH, MAILING_LIST_MULTI, SPF_HELO_NONE, SPF_PASS, USER_AGENT_GIT autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 29579C43462 for ; Thu, 20 May 2021 10:39:46 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 067B661059 for ; Thu, 20 May 2021 10:39:46 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S236349AbhETKlF (ORCPT ); Thu, 20 May 2021 06:41:05 -0400 Received: from mail.kernel.org ([198.145.29.99]:40014 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S234813AbhETKiF (ORCPT ); Thu, 20 May 2021 06:38:05 -0400 Received: by mail.kernel.org (Postfix) with ESMTPSA id 1032E61C6C; Thu, 20 May 2021 09:54:47 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1621504488; bh=dPx9z9fKQJ6K4YmTJcUomZVJhoMxNaHdCoO5HYefZCQ=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=eULwJoAg91lKSGSNCcbArjNBrhFaV573E6OqFVwCbmRVBbTxtPjSKxBMQuRFbEEOi 3zw4uIFuuaBzCyO5x+nf2j0m6N28AW9DqDMDd7T6M0krbiKdm2j4es91ygIKvobWG2 gz9Wdc20ZIh/Vx6qjH74oKRLuXGAOO8BYP+j5tlA= From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Tetsuo Handa , Marcel Holtmann , Sasha Levin , syzbot Subject: [PATCH 4.14 241/323] Bluetooth: initialize skb_queue_head at l2cap_chan_create() Date: Thu, 20 May 2021 11:22:13 +0200 Message-Id: <20210520092128.439367429@linuxfoundation.org> X-Mailer: git-send-email 2.31.1 In-Reply-To: <20210520092120.115153432@linuxfoundation.org> References: <20210520092120.115153432@linuxfoundation.org> User-Agent: quilt/0.66 MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: stable@vger.kernel.org From: Tetsuo Handa [ Upstream commit be8597239379f0f53c9710dd6ab551bbf535bec6 ] syzbot is hitting "INFO: trying to register non-static key." message [1], for "struct l2cap_chan"->tx_q.lock spinlock is not yet initialized when l2cap_chan_del() is called due to e.g. timeout. Since "struct l2cap_chan"->lock mutex is initialized at l2cap_chan_create() immediately after "struct l2cap_chan" is allocated using kzalloc(), let's as well initialize "struct l2cap_chan"->{tx_q,srej_q}.lock spinlocks there. [1] https://syzkaller.appspot.com/bug?extid=fadfba6a911f6bf71842 Reported-and-tested-by: syzbot Signed-off-by: Tetsuo Handa Signed-off-by: Marcel Holtmann Signed-off-by: Sasha Levin --- net/bluetooth/l2cap_core.c | 2 ++ 1 file changed, 2 insertions(+) diff --git a/net/bluetooth/l2cap_core.c b/net/bluetooth/l2cap_core.c index b5a7d04066ec..460401349255 100644 --- a/net/bluetooth/l2cap_core.c +++ b/net/bluetooth/l2cap_core.c @@ -445,6 +445,8 @@ struct l2cap_chan *l2cap_chan_create(void) if (!chan) return NULL; + skb_queue_head_init(&chan->tx_q); + skb_queue_head_init(&chan->srej_q); mutex_init(&chan->lock); /* Set default lock nesting level */