From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 168C2C433F5 for ; Tue, 28 Dec 2021 22:26:23 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S237632AbhL1W0W (ORCPT ); Tue, 28 Dec 2021 17:26:22 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:49138 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S237601AbhL1W0V (ORCPT ); Tue, 28 Dec 2021 17:26:21 -0500 Received: from mail-pl1-x62f.google.com (mail-pl1-x62f.google.com [IPv6:2607:f8b0:4864:20::62f]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id F40DEC06173F for ; Tue, 28 Dec 2021 14:26:20 -0800 (PST) Received: by mail-pl1-x62f.google.com with SMTP id u16so14511005plg.9 for ; Tue, 28 Dec 2021 14:26:20 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=20210112; h=date:from:to:cc:subject:message-id:references:mime-version :content-disposition:in-reply-to; bh=3jpnFYyU1UvK2qtPGd0z/wd/hya+F4jiLnmmdr9GXaY=; b=lUSNHxvHtkgI97VY4BNHsI8aGGvWFzcNyLEczitXX2GAu6UfkWCeA4fPS7M5ihYtBF R2vIXAHPuxna50R0Cs9fT7CemGFJv6g7fO0rkVFwKzDWc1QEiV8rHvLUtM5lTlFPX2UN TysjcC3EtVvf/TT+K0MEMj/2dG7uX55DG2P/sa6InIcei83woXrbsBruBpXGU75yTxsS dXgVVJZVlKbPDw+ldethhaGjmRjOXQ4N55UUqHwmgL8YbYhUiiAPk2xStYTpWJ8rvgsE IXy0lgL2Mce9N2DSZ/y94l9eYcKDu+he794dqgjMONViLrP2RSVK3abog12ExpHe/aKu fn0Q== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; h=x-gm-message-state:date:from:to:cc:subject:message-id:references :mime-version:content-disposition:in-reply-to; bh=3jpnFYyU1UvK2qtPGd0z/wd/hya+F4jiLnmmdr9GXaY=; b=nPrDCeIrSRVe9JPVG30CFz165LWL5A1cXTW3+CZ0YSW5V8QrDSzx+ecaaT3K0ycxj9 f1TXYKU9zigM1M5P4gR6El2fufajC08eAFwLxanCYAFOyytDtO/99nzYXtu/c1IjQRRb kOQ76fyGJrZSjCyGPPxiqlVGMADVF+S8W5mD5XbnPXnAfbYh82B7YeT70YVukgM2leOr 7lH2n9N1eHUdQF9MTrwiJbfLBMbw4Y3wNR+j3XSs1H68CArjVZFaZwSFC/GjLGbqzAtS rcoym6Uf8awtNC/ugkKCQH5zfI9gM7BOc18/cdFGYRszlix4kKSYSLU9XF5So3tXtDt0 N5OQ== X-Gm-Message-State: AOAM530t2e6s/kJiR2JnaahYCum6IvMp8VgCNj1vyhUD3UxPUQyEzn6T Y8ay+1PDmYE0ne1/XqVqRiQ5pA== X-Google-Smtp-Source: ABdhPJw9pY6bU/ixHEj19r6nqHSjypC3pzEscKgxKQVE846L338oJSTiWn3H18Q4b3PTpHGB3RxyEQ== X-Received: by 2002:a17:90a:f0cc:: with SMTP id fa12mr4452980pjb.134.1640730380358; Tue, 28 Dec 2021 14:26:20 -0800 (PST) Received: from google.com (157.214.185.35.bc.googleusercontent.com. [35.185.214.157]) by smtp.gmail.com with ESMTPSA id s6sm2724082pjp.19.2021.12.28.14.26.19 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Tue, 28 Dec 2021 14:26:19 -0800 (PST) Date: Tue, 28 Dec 2021 22:26:16 +0000 From: Sean Christopherson To: syzbot Cc: changbin.du@intel.com, christian.brauner@ubuntu.com, daniel@iogearbox.net, davem@davemloft.net, edumazet@google.com, hkallweit1@gmail.com, kuba@kernel.org, kvm@vger.kernel.org, linux-kernel@vger.kernel.org, netdev@vger.kernel.org, pbonzini@redhat.com, syzkaller-bugs@googlegroups.com, yajun.deng@linux.dev Subject: Re: [syzbot] WARNING in kvm_mmu_notifier_invalidate_range_start Message-ID: References: <000000000000ef6c6c05d437c830@google.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <000000000000ef6c6c05d437c830@google.com> Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Tue, Dec 28, 2021, syzbot wrote: > Hello, > > syzbot found the following issue on: > > HEAD commit: ea586a076e8a Add linux-next specific files for 20211224 > git tree: linux-next > console output: https://syzkaller.appspot.com/x/log.txt?x=12418ea5b00000 > kernel config: https://syzkaller.appspot.com/x/.config?x=a9c4e3dde2c568fb > dashboard link: https://syzkaller.appspot.com/bug?extid=4e697fe80a31aa7efe21 > compiler: gcc (Debian 10.2.1-6) 10.2.1 20210110, GNU ld (GNU Binutils for Debian) 2.35.2 > syz repro: https://syzkaller.appspot.com/x/repro.syz?x=15724985b00000 > C reproducer: https://syzkaller.appspot.com/x/repro.c?x=12d1aedbb00000 > > The issue was bisected to: > > commit e4b8954074f6d0db01c8c97d338a67f9389c042f > Author: Eric Dumazet > Date: Tue Dec 7 01:30:37 2021 +0000 > > netlink: add net device refcount tracker to struct ethnl_req_info Heh, while I'd love to blame someone else, there's zero chance this is the offending commit. The WARN repros on kvm/queue, it's likely related to the KVM memslot changes queued for 5.17. I'll take a look.