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 B5E02C433F5 for ; Sun, 20 Feb 2022 13:20:13 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S243834AbiBTNUd (ORCPT ); Sun, 20 Feb 2022 08:20:33 -0500 Received: from mxb-00190b01.gslb.pphosted.com ([23.128.96.19]:45966 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S232564AbiBTNUa (ORCPT ); Sun, 20 Feb 2022 08:20:30 -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 22CD1424AD for ; Sun, 20 Feb 2022 05:20:08 -0800 (PST) Received: by mail-io1-f71.google.com with SMTP id d194-20020a6bcdcb000000b0063a4e3b9da6so8396925iog.6 for ; Sun, 20 Feb 2022 05:20:08 -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=PxiYsB68bMJBRDStT8Q66zeZicqp8GKsGnbo6+7iasQ=; b=FPWmAhnX4v2ALcs/mQ68Fohw5noTkZfEjR51fD6Ch97PQBCdsyInoVPq7AKMwWSEOL fp17FelfaZho4Ig5EtH6P+Xmm8Y8n9wv7MvYh0xzhMiYBZy8nFMFi/6bWp919xBBOhZL IcirgZWJEEcgpnHuFdo41549/QkTIfxAhXhO53LCkaQwgE/bVFwbbrlWkEPzRA4L6zTU O9bWYOZ/S5ZPmcEjdIDeCI2VYBpV4R+m7GlZcHqMTrxHNQIXC8Tb3DD+mfOApUWooAQO mYvdj6GP1qtMAsdbwxDcv/YOCg5zZrgBmfh8SCxWg6eOTRDqlTIorqtgApC/VlON4Cwa aHig== X-Gm-Message-State: AOAM5325yBB7bxMEJnR4wWhYakMHd4JaAEq3OnjCfTSt5WUN6FniKqT/ hzItYGbfaSwCjlalM0R4VOyQsuk8KHa6l/m3SnED8ZkOiQAw X-Google-Smtp-Source: ABdhPJx2l1wrYHFYY4RP7srumSWdJBEUIPsnZmkvsKnd9Yc/h9YUaWw+LHEEleAVlMSqm5hYUdy1AxyVqJpEwi5MCvM2hTowC+yR MIME-Version: 1.0 X-Received: by 2002:a05:6602:1594:b0:640:7236:e6ea with SMTP id e20-20020a056602159400b006407236e6eamr9868298iow.23.1645363207448; Sun, 20 Feb 2022 05:20:07 -0800 (PST) Date: Sun, 20 Feb 2022 05:20:07 -0800 In-Reply-To: <20220220075826-mutt-send-email-mst@kernel.org> X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <00000000000081acbc05d872f93c@google.com> Subject: Re: [syzbot] kernel BUG in vhost_get_vq_desc From: syzbot To: dvyukov@google.com, 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:2335! invalid opcode: 0000 [#1] PREEMPT SMP KASAN CPU: 1 PID: 4048 Comm: vhost-4047 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+0x1d43/0x22c0 drivers/vhost/vhost.c:2335 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 b7 59 28 fd e9 74 ff ff ff e8 5d c8 a1 fa <0f> 0b e8 56 c8 a1 fa 48 8b 54 24 18 48 b8 00 00 00 00 00 fc ff df RSP: 0018:ffffc90001affb88 EFLAGS: 00010293 RAX: 0000000000000000 RBX: 0000000000000001 RCX: 0000000000000000 RDX: ffff88801c9c5700 RSI: ffffffff86d715c3 RDI: 0000000000000003 RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000001 R10: ffffffff86d706bc R11: 0000000000000000 R12: ffff888073b44d68 R13: 0000000000000000 R14: dffffc0000000000 R15: ffff888073b44bb0 FS: 0000000000000000(0000) GS:ffff8880b9d00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000000000000002 CR3: 0000000079bfe000 CR4: 00000000003506e0 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+0x23d/0x3d0 drivers/vhost/vhost.c:372 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+0x1d43/0x22c0 drivers/vhost/vhost.c:2335 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 b7 59 28 fd e9 74 ff ff ff e8 5d c8 a1 fa <0f> 0b e8 56 c8 a1 fa 48 8b 54 24 18 48 b8 00 00 00 00 00 fc ff df RSP: 0018:ffffc90001affb88 EFLAGS: 00010293 RAX: 0000000000000000 RBX: 0000000000000001 RCX: 0000000000000000 RDX: ffff88801c9c5700 RSI: ffffffff86d715c3 RDI: 0000000000000003 RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000001 R10: ffffffff86d706bc R11: 0000000000000000 R12: ffff888073b44d68 R13: 0000000000000000 R14: dffffc0000000000 R15: ffff888073b44bb0 FS: 0000000000000000(0000) GS:ffff8880b9d00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00005619d349f018 CR3: 0000000079bfe000 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=161cf916700000 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=13500f0e700000