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 X-Spam-Level: X-Spam-Status: No, score=-3.7 required=3.0 tests=BAYES_00,FROM_LOCAL_HEX, HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS, URIBL_BLOCKED autolearn=no autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 109A1C388F7 for ; Sat, 31 Oct 2020 06:14:23 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id C2D8F20756 for ; Sat, 31 Oct 2020 06:14:22 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726309AbgJaGOV (ORCPT ); Sat, 31 Oct 2020 02:14:21 -0400 Received: from mail-io1-f69.google.com ([209.85.166.69]:40973 "EHLO mail-io1-f69.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1725772AbgJaGOV (ORCPT ); Sat, 31 Oct 2020 02:14:21 -0400 Received: by mail-io1-f69.google.com with SMTP id j21so5730574iog.8 for ; Fri, 30 Oct 2020 23:14:19 -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:message-id:subject:from:to; bh=rkjvzxYfDZDr/kKEmWkJIKU9mlk3DIFp+Fpj4HynMVo=; b=pMtRHWTAcYMRmqt7LJDBqoI2So84VzTgVPqA9NwPGFc3i2vIKcmXvS4LIbikpIJIl5 D0ubUBoBFYRIKXgQFvxH4pOBATWkUNLOb/yuhgSnwp14pLEiKMD0ShXgRH1As1ZAJkee qkuRWaFmVpQ+PnbxBAOYWcazrVIT9r8LzzXN9aoEMuj1FISK/asGSsHwJdIbCfRUFd3x Ns/ui+lLq9tOasr6xtpBuQ7XTcVWFNdx+TL6U0/aTvw/8xQ84/Sl6dQZKnzrUgn1gMCj sYFtV3eDVr5/OXQ14xyUYKIiZhzVRINH+2ScbI6YEmrG4rSVkP5hH7YlTpfP5gN++1nR E5zw== X-Gm-Message-State: AOAM533iUfqom3YkS8Tv7xo7YrQey2WC34SHZkhJCaLQEsaaBaoLrzEC FMMDGsTo1YDhsnMfqCXJfwAMamf3FmdLPCF9q1FKRTmAHYj7 X-Google-Smtp-Source: ABdhPJypkpupBDU6TcMP0bm+7oqikDemEodNPdzkLUhm1RqlxE05epf6h++O7rxWP6lZ6flKG1R9tYApU+1STtR2IhdkaiV2KBZ9 MIME-Version: 1.0 X-Received: by 2002:a02:242b:: with SMTP id f43mr4785183jaa.111.1604124859291; Fri, 30 Oct 2020 23:14:19 -0700 (PDT) Date: Fri, 30 Oct 2020 23:14:19 -0700 X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <00000000000069dbc805b2f16c3e@google.com> Subject: WARNING in vkms_vblank_simulate (2) From: syzbot To: airlied@linux.ie, daniel@ffwll.ch, dri-devel@lists.freedesktop.org, hamohammed.sa@gmail.com, linux-kernel@vger.kernel.org, melissa.srw@gmail.com, rodrigosiqueiramelo@gmail.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 found the following issue on: HEAD commit: 3f267ec6 Add linux-next specific files for 20201029 git tree: linux-next console output: https://syzkaller.appspot.com/x/log.txt?x=170739d2500000 kernel config: https://syzkaller.appspot.com/x/.config?x=7f00c6dd47ae4c2c dashboard link: https://syzkaller.appspot.com/bug?extid=4fc21a003c8332eb0bdd compiler: gcc (GCC) 10.1.0-syz 20200507 syz repro: https://syzkaller.appspot.com/x/repro.syz?x=16e83ef2500000 C reproducer: https://syzkaller.appspot.com/x/repro.c?x=159f01f2500000 IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+4fc21a003c8332eb0bdd@syzkaller.appspotmail.com ------------[ cut here ]------------ WARNING: CPU: 0 PID: 34 at drivers/gpu/drm/vkms/vkms_crtc.c:21 vkms_vblank_simulate+0x31e/0x3b0 drivers/gpu/drm/vkms/vkms_crtc.c:21 Modules linked in: CPU: 0 PID: 34 Comm: kauditd Not tainted 5.10.0-rc1-next-20201029-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RIP: 0010:vkms_vblank_simulate+0x31e/0x3b0 drivers/gpu/drm/vkms/vkms_crtc.c:21 Code: 85 9e 00 00 00 48 8b 95 b8 01 00 00 4c 89 e1 bf 02 00 00 00 48 c7 c6 20 e6 b3 89 e8 0c 91 ef ff e9 e5 fe ff ff e8 72 e0 34 fd <0f> 0b e9 88 fd ff ff e8 e6 7b 76 fd e9 11 fe ff ff 4c 89 ef e8 d9 RSP: 0018:ffffc90000007dc0 EFLAGS: 00010046 RAX: 0000000000010001 RBX: ffff888143c91e48 RCX: ffffffff843b47c3 RDX: ffff888010fa0000 RSI: ffffffff843b4a3e RDI: 0000000000000007 RBP: 0000000000000002 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000001 R11: 0000000000000000 R12: ffff888143c90d40 R13: 0000000000fe4c00 R14: ffffffff843b4720 R15: dffffc0000000000 FS: 0000000000000000(0000) GS:ffff8880b9e00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007fff2c859fb4 CR3: 0000000013fee000 CR4: 00000000001506f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: __run_hrtimer kernel/time/hrtimer.c:1519 [inline] __hrtimer_run_queues+0x693/0xea0 kernel/time/hrtimer.c:1583 hrtimer_interrupt+0x334/0x940 kernel/time/hrtimer.c:1645 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1080 [inline] __sysvec_apic_timer_interrupt+0x146/0x540 arch/x86/kernel/apic/apic.c:1097 asm_call_irq_on_stack+0xf/0x20 __run_sysvec_on_irqstack arch/x86/include/asm/irq_stack.h:37 [inline] run_sysvec_on_irqstack_cond arch/x86/include/asm/irq_stack.h:89 [inline] sysvec_apic_timer_interrupt+0xbd/0x100 arch/x86/kernel/apic/apic.c:1091 asm_sysvec_apic_timer_interrupt+0x12/0x20 arch/x86/include/asm/idtentry.h:631 RIP: 0010:console_unlock+0x7b6/0xbb0 kernel/printk/printk.c:2509 Code: 60 8f 24 8b e8 6b 8d fd ff e8 f6 3b 00 00 31 ff 4c 89 ee e8 2c 76 17 00 4d 85 ed 0f 85 3a 02 00 00 e8 ae 7d 17 00 ff 34 24 9d <8b> 5c 24 34 31 ff 89 de e8 ed 75 17 00 85 db 0f 84 eb f9 ff ff e8 RSP: 0018:ffffc90000dcfaf0 EFLAGS: 00000293 RAX: 0000000000000000 RBX: 0000000000000000 RCX: ffffffff8155b067 RDX: ffff888010fa0000 RSI: ffffffff8158ad02 RDI: 0000000000000000 RBP: 0000000000000000 R08: 0000000000000001 R09: ffffffff8ebb4667 R10: fffffbfff1d768cc R11: 0000000000000000 R12: ffffffff84a24b90 R13: 0000000000000200 R14: dffffc0000000000 R15: ffffc90000dcfb50 vprintk_emit+0x1a1/0x4c0 kernel/printk/printk.c:2028 vprintk_func+0x8d/0x1e0 kernel/printk/printk_safe.c:393 printk+0xba/0xed kernel/printk/printk.c:2076 kauditd_printk_skb kernel/audit.c:538 [inline] kauditd_hold_skb.cold+0x41/0x50 kernel/audit.c:571 kauditd_send_queue+0x19d/0x210 kernel/audit.c:734 kauditd_thread+0x7f0/0xb80 kernel/audit.c:860 kthread+0x3af/0x4a0 kernel/kthread.c:292 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:296 --- This report is generated by a bot. It may contain errors. See https://goo.gl/tpsmEJ for more information about syzbot. syzbot engineers can be reached at syzkaller@googlegroups.com. syzbot will keep track of this issue. See: https://goo.gl/tpsmEJ#status for how to communicate with syzbot. syzbot can test patches for this issue, for details see: https://goo.gl/tpsmEJ#testing-patches