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 95FF5C433F5 for ; Sat, 19 Feb 2022 13:01:14 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S242340AbiBSNBb (ORCPT ); Sat, 19 Feb 2022 08:01:31 -0500 Received: from mxb-00190b01.gslb.pphosted.com ([23.128.96.19]:60464 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S233494AbiBSNB3 (ORCPT ); Sat, 19 Feb 2022 08:01:29 -0500 Received: from mail-io1-f71.google.com (mail-io1-f71.google.com [209.85.166.71]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 13BA31FFF7F for ; Sat, 19 Feb 2022 05:01:11 -0800 (PST) Received: by mail-io1-f71.google.com with SMTP id b22-20020a6b6716000000b0064070ce7b49so4228281ioc.5 for ; Sat, 19 Feb 2022 05:01:11 -0800 (PST) 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=Fl+5n1jjz3m84AqaKPaTylYfodG3ttae4QcHqpR94z0=; b=GYE4HJsU3pKB4jvVOPZqqA3vqbtJVpOvUmzrPtYB2l3Je75ccQcbwItvluzKBh5HvE eYacyoD6D9CjwaE81mxJKptLatpdp0M8PcgVY2QzR/uxTFD2LN3HSOQ2VoNTjZ2n2GBj MGFyctscVpwS1qtmuovDNyxEIeMkAEqmCZ/EIXAtEA43LVkjjhx9xmBbrC4/cYpe0LRA T1dpwVeYCF6vg+w+N/hRtETsSC1xn/SQJz9jOP4sswPtH89WfHztq4NgI9QAimDI6bJc vj68wmLYD8+AQ3+Q4/tQg3p2an7G8rePU5rHH0bF0HfHV9M/wdft89/ukgLQ+GXyZf25 qgpg== X-Gm-Message-State: AOAM533GGk0jIzkcMYfU94i1IA4LBk5YtQdc2l4K5gm0MoelVAAJggHA xReYCMqYrUOee7re+nuFcvHqmCJxKSbmc+8uiirYORwUxdq3 X-Google-Smtp-Source: ABdhPJwXgfsqVH95fQpRwUN9c0iKCYH2k3ZDXnelYs+gRCiFjS1ehvyyeQAsO7CS5n8ALAaCnJ8cpDaydi+pMUBdcxMJmnoHjKH6 MIME-Version: 1.0 X-Received: by 2002:a6b:117:0:b0:634:4788:28e1 with SMTP id 23-20020a6b0117000000b00634478828e1mr9024537iob.72.1645275670473; Sat, 19 Feb 2022 05:01:10 -0800 (PST) Date: Sat, 19 Feb 2022 05:01:10 -0800 In-Reply-To: <20220219125100.835-1-hdanton@sina.com> X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <000000000000e5720605d85e97d7@google.com> Subject: Re: [syzbot] kernel BUG in vhost_get_vq_desc From: syzbot To: hdanton@sina.com, jasowang@redhat.com, linux-kernel@vger.kernel.org, mst@redhat.com, syzkaller-bugs@googlegroups.com Content-Type: text/plain; charset="UTF-8" Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Hello, syzbot has tested the proposed patch but the reproducer is still triggering an issue: kernel BUG in vhost_get_vq_desc ------------[ cut here ]------------ kernel BUG at drivers/vhost/vhost.c:2338! invalid opcode: 0000 [#1] PREEMPT SMP KASAN CPU: 0 PID: 4071 Comm: vhost-4070 Not tainted 5.17.0-rc4-syzkaller-00054-gf71077a4d84b-dirty #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RIP: 0010:vhost_get_vq_desc+0x1dc5/0x2350 drivers/vhost/vhost.c:2338 Code: 00 00 00 48 c7 c6 20 2c 9d 8a 48 c7 c7 98 a6 8e 8d 48 89 ca 48 c1 e1 04 48 01 d9 e8 25 59 28 fd e9 74 ff ff ff e8 cb c7 a1 fa <0f> 0b e8 c4 c7 a1 fa 48 8b 54 24 18 48 b8 00 00 00 00 00 fc ff df RSP: 0018:ffffc900028bfb78 EFLAGS: 00010293 RAX: 0000000000000000 RBX: 0000000000000001 RCX: 0000000000000000 RDX: ffff88801cbd1d00 RSI: ffffffff86d71655 RDI: 0000000000000003 RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000001 R10: ffffffff86d7072d R11: 0000000000000000 R12: 0000000000000000 R13: 0000000000000000 R14: ffff88806ffc4bb0 R15: dffffc0000000000 FS: 0000000000000000(0000) GS:ffff8880b9c00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000000000000002 CR3: 000000001d077000 CR4: 00000000003506f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: vhost_vsock_handle_tx_kick+0x277/0xa20 drivers/vhost/vsock.c:522 vhost_worker+0x2e9/0x3e0 drivers/vhost/vhost.c:374 kthread+0x2e9/0x3a0 kernel/kthread.c:377 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:295 Modules linked in: ---[ end trace 0000000000000000 ]--- RIP: 0010:vhost_get_vq_desc+0x1dc5/0x2350 drivers/vhost/vhost.c:2338 Code: 00 00 00 48 c7 c6 20 2c 9d 8a 48 c7 c7 98 a6 8e 8d 48 89 ca 48 c1 e1 04 48 01 d9 e8 25 59 28 fd e9 74 ff ff ff e8 cb c7 a1 fa <0f> 0b e8 c4 c7 a1 fa 48 8b 54 24 18 48 b8 00 00 00 00 00 fc ff df RSP: 0018:ffffc900028bfb78 EFLAGS: 00010293 RAX: 0000000000000000 RBX: 0000000000000001 RCX: 0000000000000000 RDX: ffff88801cbd1d00 RSI: ffffffff86d71655 RDI: 0000000000000003 RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000001 R10: ffffffff86d7072d R11: 0000000000000000 R12: 0000000000000000 R13: 0000000000000000 R14: ffff88806ffc4bb0 R15: dffffc0000000000 FS: 0000000000000000(0000) GS:ffff8880b9d00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007fc7293991d0 CR3: 000000001d077000 CR4: 00000000003506e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Tested on: commit: f71077a4 Merge tag 'mmc-v5.17-rc1-2' of git://git.kern.. git tree: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/ console output: https://syzkaller.appspot.com/x/log.txt?x=11e82d7a700000 kernel config: https://syzkaller.appspot.com/x/.config?x=a78b064590b9f912 dashboard link: https://syzkaller.appspot.com/bug?extid=3140b17cb44a7b174008 compiler: gcc (Debian 10.2.1-6) 10.2.1 20210110, GNU ld (GNU Binutils for Debian) 2.35.2 patch: https://syzkaller.appspot.com/x/patch.diff?x=11857326700000