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 45E01C4332F for ; Tue, 10 May 2022 08:51:21 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S238229AbiEJIzN (ORCPT ); Tue, 10 May 2022 04:55:13 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:55430 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S238236AbiEJIzL (ORCPT ); Tue, 10 May 2022 04:55:11 -0400 Received: from mail-io1-f71.google.com (mail-io1-f71.google.com [209.85.166.71]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 221FC3D1D1 for ; Tue, 10 May 2022 01:51:14 -0700 (PDT) Received: by mail-io1-f71.google.com with SMTP id u18-20020a5d8712000000b0064c7a7c497aso11431731iom.18 for ; Tue, 10 May 2022 01:51:14 -0700 (PDT) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; h=x-gm-message-state:mime-version:date:in-reply-to:message-id:subject :from:to; bh=gEeJNjfS0q6RM62Nvi60TGEoWat+e1zZfxTGA+WRzSY=; b=yYwHAZS4Q3gVwG8K24sQnAIA/l61lxvVBSxQBe3vWN4HCi44G5YLveoR/IBW0LZQSi kE/4GrpjUOENjkwV2KnRBdOcB7sdaG7U3nbmWFwBY81OzF0ayUrWU9XmcvB3V6BsyIB3 fOw9GGtVc6D0vwwZUn/9HqJ0F1IfyfPURsI+/eBmUdK4lX5jYRVtSoFH9avCzrMKBKIU 33xg+8GntcqghR6nJgFv+gEs7TJrxlSJ1MY0col3byGT7WScDWu8Lmte14fPDortmmb7 pvyz2fVyWqlsOIJnSu8RbtuKuB3KcK3CxOGla3NBTdB6jObKEPbLVL/U/uCHhg/wXd+S +z5Q== X-Gm-Message-State: AOAM530EPLaG9nFq6EI7FJfT7HupTJUTmtM8ysEV3K1mbWfnRi/seh/c ETY5v1XMAbrwrHnBwOUzjuHmIyqdVY96Vj0UpE7sZCcVb8cV X-Google-Smtp-Source: ABdhPJymd70zSLRupmjht8i7wwnCSSg/9t9Ls3kE6/21v2tdD1hcmHlI4ApXwuuuEnn2Izn9LJhqsv6m4l19IZnSt7QWs+/iF9HJ MIME-Version: 1.0 X-Received: by 2002:a05:6e02:218b:b0:2cd:fb28:5417 with SMTP id j11-20020a056e02218b00b002cdfb285417mr9002492ila.83.1652172673463; Tue, 10 May 2022 01:51:13 -0700 (PDT) Date: Tue, 10 May 2022 01:51:13 -0700 In-Reply-To: <000000000000402c5305ab0bd2a2@google.com> X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <0000000000004f3c0d05dea46dac@google.com> Subject: Re: [syzbot] INFO: task hung in synchronize_rcu (3) From: syzbot To: akpm@linux-foundation.org, davem@davemloft.net, jhs@mojatatu.com, jiri@resnulli.us, kvm@vger.kernel.org, linux-fsdevel@vger.kernel.org, linux-kernel@vger.kernel.org, mingo@elte.hu, mlevitsk@redhat.com, netdev@vger.kernel.org, pbonzini@redhat.com, peterz@infradead.org, seanjc@google.com, syzkaller-bugs@googlegroups.com, tglx@linutronix.de, vinicius.gomes@intel.com, viro@zeniv.linux.org.uk, xiyou.wangcong@gmail.com Content-Type: text/plain; charset="UTF-8" Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org syzbot suspects this issue was fixed by commit: commit 2d08935682ac5f6bfb70f7e6844ec27d4a245fa4 Author: Sean Christopherson Date: Fri Apr 15 00:43:41 2022 +0000 KVM: x86: Don't re-acquire SRCU lock in complete_emulated_io() bisection log: https://syzkaller.appspot.com/x/bisect.txt?x=16dc2e49f00000 start commit: ea4424be1688 Merge tag 'mtd/fixes-for-5.17-rc8' of git://g.. git tree: upstream kernel config: https://syzkaller.appspot.com/x/.config?x=442f8ac61e60a75e dashboard link: https://syzkaller.appspot.com/bug?extid=0c6da80218456f1edc36 syz repro: https://syzkaller.appspot.com/x/repro.syz?x=1685af9e700000 C reproducer: https://syzkaller.appspot.com/x/repro.c?x=11b09df1700000 If the result looks correct, please mark the issue as fixed by replying with: #syz fix: KVM: x86: Don't re-acquire SRCU lock in complete_emulated_io() For information about bisection process see: https://goo.gl/tpsmEJ#bisection