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[209.132.180.67]) by mx.google.com with ESMTP id p70si7740001pfa.9.2019.03.17.13.49.48; Sun, 17 Mar 2019 13:50:03 -0700 (PDT) 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; 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=fail (p=NONE sp=NONE dis=NONE) header.from=appspotmail.com Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727426AbfCQUtC (ORCPT + 99 others); Sun, 17 Mar 2019 16:49:02 -0400 Received: from mail-it1-f199.google.com ([209.85.166.199]:40993 "EHLO mail-it1-f199.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726936AbfCQUtC (ORCPT ); Sun, 17 Mar 2019 16:49:02 -0400 Received: by mail-it1-f199.google.com with SMTP id q184so13054450itd.6 for ; Sun, 17 Mar 2019 13:49:01 -0700 (PDT) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:mime-version:date:in-reply-to:message-id:subject :from:to; bh=AdDJQGRn1HKxzvaNiNMtuUjAUxpN+UvUqzicULcWxYI=; b=DU1vw7qd06zKpvWjfZJM85hyR2nSFHi1R5fognJWIGpMm2gAVDjopDXZpWI9Q39m0c RdJQSFlCS9ARJnXPq1M2WRFffmUG3cM++D0jm0iuEj/GaaiGOVzWg0aQvN4rYUENgaEK Pd9CcUSISt/r+21NvYQx5nrrcAcHjRotqqqqdgso3QzXtfJx4tSiWXkPariJngpf4NS4 PKNp8YdS39UQP9IIEpGrf00lp0jmY/oh6+NNn+Izja6vtW3TOKpWziBbvGmvZFrS5oel tcVQ9a3pA9IJsAytnSZ1UgEHApvtHWK8xLmxyqygz6lPcN1KQJqT05PYyV7M1BK0f6Y9 CmsA== X-Gm-Message-State: APjAAAWakHouNjA4VqCguZWmcFnK+cySE3h6jq4xdmmplR1sKcFAzVpb hkHuYPRIFpNTDoTn3uwLNlcBbY3lToNQR9UH2e9hNPNbiNqG MIME-Version: 1.0 X-Received: by 2002:a02:3f1d:: with SMTP id d29mr8708325jaa.4.1552855741444; Sun, 17 Mar 2019 13:49:01 -0700 (PDT) Date: Sun, 17 Mar 2019 13:49:01 -0700 In-Reply-To: <000000000000b05d0c057e492e33@google.com> X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <000000000000db3d130584506672@google.com> Subject: Re: kernel panic: corrupted stack end in wb_workfn From: syzbot To: akpm@linux-foundation.org, aryabinin@virtuozzo.com, cai@lca.pw, davem@davemloft.net, dvyukov@google.com, guro@fb.com, hannes@cmpxchg.org, jbacik@fb.com, ktkhai@virtuozzo.com, linux-kernel@vger.kernel.org, linux-mm@kvack.org, linux-sctp@vger.kernel.org, mgorman@techsingularity.net, mhocko@suse.com, netdev@vger.kernel.org, nhorman@tuxdriver.com, shakeelb@google.com, syzkaller-bugs@googlegroups.com, viro@zeniv.linux.org.uk, vyasevich@gmail.com, willy@infradead.org Content-Type: text/plain; charset="UTF-8"; format=flowed; delsp=yes Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org syzbot has bisected this bug to: commit c981f254cc82f50f8cb864ce6432097b23195b9c Author: Al Viro Date: Sun Jan 7 18:19:09 2018 +0000 sctp: use vmemdup_user() rather than badly open-coding memdup_user() bisection log: https://syzkaller.appspot.com/x/bisect.txt?x=137bcecf200000 start commit: c981f254 sctp: use vmemdup_user() rather than badly open-c.. git tree: upstream final crash: https://syzkaller.appspot.com/x/report.txt?x=10fbcecf200000 console output: https://syzkaller.appspot.com/x/log.txt?x=177bcecf200000 kernel config: https://syzkaller.appspot.com/x/.config?x=5e7dc790609552d7 dashboard link: https://syzkaller.appspot.com/bug?extid=ec1b7575afef85a0e5ca syz repro: https://syzkaller.appspot.com/x/repro.syz?x=16a9a84b400000 C reproducer: https://syzkaller.appspot.com/x/repro.c?x=17199bb3400000 Reported-by: syzbot+ec1b7575afef85a0e5ca@syzkaller.appspotmail.com Fixes: c981f254 ("sctp: use vmemdup_user() rather than badly open-coding memdup_user()")