Received: by 2002:a05:6902:102b:0:0:0:0 with SMTP id x11csp2071010ybt; Sun, 28 Jun 2020 07:11:35 -0700 (PDT) X-Google-Smtp-Source: ABdhPJx7eCpKcPWKiOeCMFxwQ2mCgyHKas2MGKKw5swJj2xgP0UBDq7ubnLRKv4GKJAgzEixWzCz X-Received: by 2002:a17:907:2149:: with SMTP id rk9mr10013850ejb.553.1593353495647; Sun, 28 Jun 2020 07:11:35 -0700 (PDT) ARC-Seal: i=1; a=rsa-sha256; t=1593353495; cv=none; d=google.com; s=arc-20160816; b=zjE+7oRykb9P0t6opXncxG7TJH5Ebnp2B2HgtznmO1VAhnLbnzY8ZSkQKTwYGPV765 aaQ6IJSmhZ6nwBk7yhyAyb3FXaIhVG2LVh6I0RHwj8+RvNLVj6iVhfR9MBH7EU8hwvVt XcDX2/mrWSfCJz1OuU37G7jMvJ2ynu55P1sMOVKLbx/JmduXoB/OhJ5PID3RJa7WcQ+2 xf6OPXNfVHSvvPFR7mctU89flLYJE7Yze9Not01kb5MriAvHskolSVC/3+2++5xRm/3V 2YxkyR60Dl/RBSDTFhyR1h09KNEK9d5HH31oT5fW2boG2fx1XSGg8qmq4toNm+I07SQb KS3w== ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=arc-20160816; h=list-id:precedence:sender:to:from:subject:message-id:in-reply-to :date:mime-version; bh=e3mM+wVWZMbblXjHpKh3rVh40chIjEQjp+JbUdH4Rk8=; b=EqIGJZ7fmq64koPna8twntVwKjgAZqllJRl/ttUktrfzw/vTsHe23hFDJlqA+SKsM4 DswsW9iJwAZ+Haznsc/y3vRx+Zj0AtTtGWqzBiE8n9wBh8Tv2Q14bvLZiQJb41kzheia C9uh+uBTnCzmuaUhxL6f7Zzf0rWM2nq6HLH5SyO6crrPdT1k0z+YjMU+VJawfhTmPa97 NeD5u4zDcASwTGxlZCCDvHA74x6cjQ8MwjC+CSmBRxzApgOOFxXyvgVkk7iWtkH/029u WMb6qg9N10piRY18tS6sFm2NFYclkQZra2GPGgXTLjZmvpqwNpEMj8slWjHhoP/zlS7v uN+Q== ARC-Authentication-Results: i=1; mx.google.com; spf=pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 23.128.96.18 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org; dmarc=fail (p=NONE sp=NONE dis=NONE) header.from=appspotmail.com Return-Path: Received: from vger.kernel.org (vger.kernel.org. [23.128.96.18]) by mx.google.com with ESMTP id lw6si4284218ejb.506.2020.06.28.07.11.12; Sun, 28 Jun 2020 07:11:35 -0700 (PDT) Received-SPF: pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 23.128.96.18 as permitted sender) client-ip=23.128.96.18; Authentication-Results: mx.google.com; spf=pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 23.128.96.18 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 S1726457AbgF1OLG (ORCPT + 99 others); Sun, 28 Jun 2020 10:11:06 -0400 Received: from mail-io1-f69.google.com ([209.85.166.69]:56297 "EHLO mail-io1-f69.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726397AbgF1OLF (ORCPT ); Sun, 28 Jun 2020 10:11:05 -0400 Received: by mail-io1-f69.google.com with SMTP id k10so8941811ioh.22 for ; Sun, 28 Jun 2020 07:11:05 -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=e3mM+wVWZMbblXjHpKh3rVh40chIjEQjp+JbUdH4Rk8=; b=jY+7rqdVYV4hHwt+JjwJ4XjpfZhB15f9tXwOz1aTcQpKfS/eDQAvXxEk0MTBLDZaAz 7mhYlxQXyqmtDz+ycxu4DGvjPMFhvMc4BLli02ijwCo6WBtE31IAdKUHbDN3jWMtNkqU R26bwSN9fvTMOo4PZvAnro6ImsURj0NZVYFsDSAGEaDK9QondRRqQKm87gCPLjv98Zz/ LNelPpDpjpavBpEphBKDCHCgNOZlqAtCzdPy/U+AO07AfI/7sVJ6Gpm+Qb+34uqXqy8T 7z99e/Z7wAvWjyxIfZAObIfvRM7iz9mK1l0Ahz4r6q2bubo5sN6DlS0I8owJQQf8pXhk fKBQ== X-Gm-Message-State: AOAM530xUf5AZ9iIWWxRxGtBVDXSucPOay05ZKw/NvYlyk+/+CRecl5G Xe0V/NgZFqIbQwjQdek756hQrbUbAFFsiSLLgCUnXhx/M6tC MIME-Version: 1.0 X-Received: by 2002:a05:6638:236:: with SMTP id f22mr13173946jaq.18.1593353465153; Sun, 28 Jun 2020 07:11:05 -0700 (PDT) Date: Sun, 28 Jun 2020 07:11:05 -0700 In-Reply-To: X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <0000000000004ad07105a9258303@google.com> Subject: Re: possible deadlock in dev_mc_unsync From: syzbot To: ap420073@gmail.com, davem@davemloft.net, kuba@kernel.org, linux-kernel@vger.kernel.org, netdev@vger.kernel.org, syzkaller-bugs@googlegroups.com, xiyou.wangcong@gmail.com Content-Type: text/plain; charset="UTF-8" Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Hello, syzbot has tested the proposed patch and the reproducer did not trigger crash: Reported-and-tested-by: syzbot+08e3d39f3eb8643216be@syzkaller.appspotmail.com Tested on: commit: 152c6a4d genetlink: get rid of family->attrbuf git tree: https://github.com/congwang/linux.git net kernel config: https://syzkaller.appspot.com/x/.config?x=bf3aec367b9ab569 dashboard link: https://syzkaller.appspot.com/bug?extid=08e3d39f3eb8643216be compiler: gcc (GCC) 10.1.0-syz 20200507 Note: testing is done by a robot and is best-effort only.