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[209.132.180.67]) by mx.google.com with ESMTP id be23si3509014edb.103.2019.11.04.06.52.12; Mon, 04 Nov 2019 06:52:35 -0800 (PST) Received-SPF: pass (google.com: best guess record for domain of linux-kernel-owner@vger.kernel.org designates 209.132.180.67 as permitted sender) client-ip=209.132.180.67; Authentication-Results: mx.google.com; dkim=pass header.i=@gmail.com header.s=20161025 header.b=EeRWCft8; spf=pass (google.com: best guess record for domain of linux-kernel-owner@vger.kernel.org designates 209.132.180.67 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org; dmarc=pass (p=NONE sp=QUARANTINE dis=NONE) header.from=gmail.com Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1728761AbfKDOtP (ORCPT + 99 others); Mon, 4 Nov 2019 09:49:15 -0500 Received: from mail-qk1-f194.google.com ([209.85.222.194]:37233 "EHLO mail-qk1-f194.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1727796AbfKDOtP (ORCPT ); Mon, 4 Nov 2019 09:49:15 -0500 Received: by mail-qk1-f194.google.com with SMTP id e187so5105355qkf.4; Mon, 04 Nov 2019 06:49:14 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=date:from:to:cc:subject:message-id:references:mime-version :content-disposition:in-reply-to:user-agent; bh=Yg35CIgMCDjht+ZPU7pxGiVxYKNbmDF87GWEVQqBk4g=; b=EeRWCft8TXJWTU/w0UoFt0p+unRSYZR/wh8VxMzC4je4nmw3swP8V2nZuWpcQ4CF6q RYxxjGsIzl+JI7qoTeneH3FYzSpbe0/uRRyrS43MkSOhZ6Th4O9QXGMKKh31MCfGDcxq fkxVIdbclEoDHtEhIUhCO/xoG46dXebq6u12F/0fUEbQRVHd944YP/rp47HkvFOAQ2ei za1uXKE74aK6Fi98SE0CgFuJBncNRnttzAhEMmQ6PA5GVWZLkyQk65M8+44GcT1ND3Yl ctOLE3aKV8FGgeai9E3a+3qFYhKq9Q42ddAuqY+JIA8MA1Hu34pcbbb9ik2XrgEYCrZo R2FQ== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:date:from:to:cc:subject:message-id:references :mime-version:content-disposition:in-reply-to:user-agent; bh=Yg35CIgMCDjht+ZPU7pxGiVxYKNbmDF87GWEVQqBk4g=; b=ZTm3lLrZG8Pj1E7Sl+KRCQWOYxCxufR/DcthmxJAntyagC8NAQDArB5Bh2PDwKh+mZ Bfo9slr7S4o49AvqeEDzeQzzHAg3AKW0dGugj6XoFAVvwhAo1yfv9+MCIxus/aUkt+wB 4/bQMK1EIdbJqVRdPfYjY3WlvX/brXR/I9fFXwS0N9mzz3/UntKlAIAtmgLeopXlv8zG TDG02WjBirZSRWFop8sW5gyzfDAdCODSMC8YJh7sakDnqtonVvcAzPfXtXvXhay4rxsK A0v8/Cun1ME79VoeUqkUqJVolji66dDBrQFQGaTNAYWRVDTGDX8VvZKyiKQOOU3/rPoC OvwA== X-Gm-Message-State: APjAAAVICNOHOb7uxy2oG1ctObUe85YyoC1HoutsvDAcpIAjMLmYYAXg 1PI+dIh0gs7qHgg9U1hWoRBPYtreCkDDtQ== X-Received: by 2002:ae9:e851:: with SMTP id a78mr17447837qkg.312.1572878953090; Mon, 04 Nov 2019 06:49:13 -0800 (PST) Received: from localhost.localdomain ([168.181.48.201]) by smtp.gmail.com with ESMTPSA id l50sm4114604qtc.7.2019.11.04.06.49.11 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 04 Nov 2019 06:49:12 -0800 (PST) Received: by localhost.localdomain (Postfix, from userid 1000) id BC2ECC16E7; Mon, 4 Nov 2019 11:49:09 -0300 (-03) Date: Mon, 4 Nov 2019 11:49:09 -0300 From: Marcelo Ricardo Leitner To: Wei Zhao Cc: kernel test robot , vyasevich@gmail.com, nhorman@tuxdriver.com, davem@davemloft.net, linux-sctp@vger.kernel.org, netdev@vger.kernel.org, linux-kernel@vger.kernel.org, wally.zhao@nokia-sbell.com, lkp@lists.01.org Subject: Re: [sctp] 327fecdaf3: BUG:kernel_NULL_pointer_dereference,address Message-ID: <20191104144909.GA15842@localhost.localdomain> References: <1572451637-14085-1-git-send-email-wallyzhao@gmail.com> <20191104084635.GM29418@shao2-debian> <20191104132508.GA53856@localhost.localdomain> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: User-Agent: Mutt/1.12.1 (2019-06-15) Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Mon, Nov 04, 2019 at 10:14:00PM +0800, Wei Zhao wrote: > On 11/4/19, Marcelo Ricardo Leitner wrote: > > On Mon, Nov 04, 2019 at 04:46:35PM +0800, kernel test robot wrote: > >> [ 35.312661] BUG: kernel NULL pointer dereference, address: > >> 00000000000005d8 > >> [ 35.316225] #PF: supervisor read access in kernel mode > >> [ 35.319178] #PF: error_code(0x0000) - not-present page > >> [ 35.322078] PGD 800000021b569067 P4D 800000021b569067 PUD 21b688067 PMD > >> 0 > >> [ 35.325629] Oops: 0000 [#1] SMP PTI > >> [ 35.327965] CPU: 0 PID: 3148 Comm: trinity-c5 Not tainted > >> 5.4.0-rc3-01107-g327fecdaf39ab #12 > >> [ 35.332863] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS > >> 1.10.2-1 04/01/2014 > >> [ 35.337932] RIP: 0010:sctp_packet_transmit+0x767/0x822 > > > > Right, as asoc can be NULL by then. (per the check on it a few lines > > before the change here). > > Yes, apologize for missing the NULL check (Actually I realized some > further check is need to correctly identify the first in flight > packet, as outstanding_bytes has already been increased by this first > in flight packet itself before getting into sctp_packet_transmit). > > Anyway, I think I do not need further action, as the patch is anyway > not going to be merged, the 0day robot picks up the patch from the > mail list directly instead of git repo, right? That's my understanding as well. I double checked and the patch wasn't applied by Dave, so we're good. Thanks, Marcelo