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=-5.5 required=3.0 tests=FROM_LOCAL_HEX, HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,MENTIONS_GIT_HOSTING, SPF_PASS,URIBL_BLOCKED autolearn=ham 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 1B53BC67839 for ; Fri, 14 Dec 2018 12:51:07 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id D3276208E7 for ; Fri, 14 Dec 2018 12:51:06 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org D3276208E7 Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=syzkaller.appspotmail.com Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=linux-kernel-owner@vger.kernel.org Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1729763AbeLNMvF (ORCPT ); Fri, 14 Dec 2018 07:51:05 -0500 Received: from mail-io1-f72.google.com ([209.85.166.72]:51608 "EHLO mail-io1-f72.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726281AbeLNMvF (ORCPT ); Fri, 14 Dec 2018 07:51:05 -0500 Received: by mail-io1-f72.google.com with SMTP id h6so4500759ioq.18 for ; Fri, 14 Dec 2018 04:51:04 -0800 (PST) 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=oPufeOebDa1ETFaHA+cGBvtTF3RxaHpenNIRp2iOcdc=; b=sGc0tqjJDAi4QVOq/nJ3KphDMlDeUrpyPzfs7oTgmraiIM+1n7mF7ggNP92w4/0rfi QbDsXpo0I0GKrPlwtXpq62UtdVFwfYFX7idhbeVvNTuRJmXxP79PLhThtgiZGNO8Hmgw JWyU410Enb7EvsL7qoLxwQnEEeaIqxTkCct2RNAFqY8cXU2mF2D9RdfX+SQR6mgZ7ph+ Bt+1ZPcf0DRZ2BKujK7ZIrqHtxZg6Z42VGR0B9ysgKZRoh4o2TJ86eDOvVvz9hZuIXGX +43GQYbQ58asTeROaj7tGxG4gXJTB1Lyk7O6eF3XTIyS6A1OaRsjwgR/5LOM9jQm7nBQ D4KA== X-Gm-Message-State: AA+aEWbyN/eKLWIQKuG3cKEB11aads5UW3GXR+AYHY9vPrlcticuNWcl 7FE7U/a6bJ1JOtEwB9zJ4rgtZIWXD9o5jsQP6Tu2FrtY9BIc X-Google-Smtp-Source: AFSGD/Xf+AbdT7w5VLea6O9R1ww3ofjB92CKHNPgAVUJz3kUf8+TXBLk5YAonHexZMXFGWVIbWVhh8bYS5CTebz6S1q4rCvXgfgd MIME-Version: 1.0 X-Received: by 2002:a24:ac5f:: with SMTP id m31mr2464534iti.19.1544791864023; Fri, 14 Dec 2018 04:51:04 -0800 (PST) Date: Fri, 14 Dec 2018 04:51:04 -0800 X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <0000000000004ea80b057cfae21e@google.com> Subject: general protection fault in watchdog From: syzbot To: akpm@linux-foundation.org, dvyukov@google.com, linux-kernel@vger.kernel.org, paulmck@linux.vnet.ibm.com, penguin-kernel@I-love.SAKURA.ne.jp, rafael.j.wysocki@intel.com, syzkaller-bugs@googlegroups.com, vkuznets@redhat.com Content-Type: text/plain; charset="UTF-8"; format=flowed; delsp=yes Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Hello, syzbot found the following crash on: HEAD commit: f5d582777bcb Merge branch 'for-linus' of git://git.kernel... git tree: upstream console output: https://syzkaller.appspot.com/x/log.txt?x=16aca143400000 kernel config: https://syzkaller.appspot.com/x/.config?x=c8970c89a0efbb23 dashboard link: https://syzkaller.appspot.com/bug?extid=7713f3aa67be76b1552c compiler: gcc (GCC) 8.0.1 20180413 (experimental) syz repro: https://syzkaller.appspot.com/x/repro.syz?x=1131381b400000 C reproducer: https://syzkaller.appspot.com/x/repro.c?x=13bae593400000 IMPORTANT: if you fix the bug, please add the following tag to the commit: Reported-by: syzbot+7713f3aa67be76b1552c@syzkaller.appspotmail.com Node 0 DMA free:15908kB min:164kB low:204kB high:244kB active_anon:0kB inactive_anon:0kB active_file:0kB inactive_file:0kB unevictable:0kB writepending:0kB present:15992kB managed:15908kB mlocked:0kB kernel_stack:0kB pagetables:0kB bounce:0kB free_pcp:0kB local_pcp:0kB free_cma:0kB kasan: CONFIG_KASAN_INLINE enabled kasan: GPF could be caused by NULL-ptr deref or user memory access general protection fault: 0000 [#1] PREEMPT SMP KASAN CPU: 1 PID: 1019 Comm: khungtaskd Not tainted 4.20.0-rc6+ #150 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RIP: 0010:check_hung_uninterruptible_tasks kernel/hung_task.c:197 [inline] RIP: 0010:watchdog+0x492/0x1060 kernel/hung_task.c:289 Code: 44 89 b5 30 fe ff ff 48 c1 e8 03 4c 01 e8 48 89 85 e8 fd ff ff e9 f8 00 00 00 e8 29 f3 ff ff 48 8d 7b 10 48 89 f8 48 c1 e8 03 <42> 80 3c 28 00 0f 85 70 0a 00 00 4c 8b 73 10 bf 02 00 00 00 4c 89 RSP: 0018:ffff8881d7b37cc8 EFLAGS: 00010202 RAX: 01a5bfffffffff51 RBX: 0d2dfffffffffa7a RCX: ffffffff817f9259 RDX: 0000000000000000 RSI: ffffffff817f9147 RDI: 0d2dfffffffffa8a xt_bpf: check failed: parse error RBP: ffff8881d7b37f00 R08: ffff8881d7bae140 R09: ffffed103b5e5b5f R10: ffffed103b5e5b5f R11: ffff8881daf2dafb R12: 00000000000003d6 R13: dffffc0000000000 R14: 1ffff1103af66fbb R15: 00000000003fffd7 FS: 0000000000000000(0000) GS:ffff8881daf00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f98b2d7c324 CR3: 00000001931bf000 CR4: 00000000001406e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: lowmem_reserve[]: 0 2818 6321 6321 Node 0 DMA32 free:43812kB min:30052kB low:37564kB high:45076kB active_anon:6236kB inactive_anon:0kB active_file:0kB inactive_file:80kB unevictable:0kB writepending:0kB present:3129332kB managed:2888780kB mlocked:0kB kernel_stack:32kB pagetables:0kB bounce:0kB free_pcp:200kB local_pcp:200kB free_cma:0kB kthread+0x35a/0x440 kernel/kthread.c:246 ret_from_fork+0x3a/0x50 arch/x86/entry/entry_64.S:352 Modules linked in: lowmem_reserve[]: 0 0 3503 3503 Node 0 Normal free:158644kB min:37364kB low:46704kB high:56044kB active_anon:4768kB inactive_anon:768kB active_file:556kB inactive_file:1936kB unevictable:0kB writepending:0kB present:4718592kB managed:3587816kB mlocked:0kB kernel_stack:5952kB pagetables:1172kB bounce:0kB free_pcp:2416kB local_pcp:604kB free_cma:0kB lowmem_reserve[]: 0 0 0 0 Node 0 DMA: 1*4kB (U) 0*8kB 0*16kB 1*32kB (U) 2*64kB (U) 1*128kB (U) 1*256kB (U) 0*512kB 1*1024kB (U) 1*2048kB (M) 3*4096kB (M) = 15908kB Node 0 DMA32: 21*4kB (UM) 19*8kB (ME) 17*16kB (UM) 15*32kB (UME) 13*64kB (ME) 4*128kB (M) 3*256kB (UM) 16*512kB (UM) 12*1024kB (UME) 6*2048kB (UME) 2*4096kB (UM) = 44060kB Node 0 Normal: 366*4kB (UME) 308*8kB (UME) 615*16kB (UME) 146*32kB (UME) 467*64kB (UME) 43*128kB (UM) 4*256kB (UM) 2*512kB (ME) 2*1024kB (ME) 0*2048kB 0*4096kB = 57928kB Node 0 hugepages_total=0 hugepages_free=0 hugepages_surp=0 hugepages_size=1048576kB Node 0 hugepages_total=0 hugepages_free=0 hugepages_surp=0 hugepages_size=2048kB 591 total pagecache pages 0 pages in swap cache Swap cache stats: add 0, delete 0, find 0/0 Free swap = 0kB Total swap = 0kB 1965979 pages RAM 0 pages HighMem/MovableOnly 342853 pages reserved 0 pages cma reserved Unreclaimable slab info: Name Used Total TIPC 1KB 7KB SCTPv6 2KB 6KB DCCPv6 2KB 7KB DCCP 2KB 6KB fib6_nodes 0KB 4KB ip6_dst_cache 4KB 7KB RAWv6 9KB 19KB UDPv6 14KB 14KB TCPv6 23KB 29KB nf_conntrack 0KB 3KB sd_ext_cdb 0KB 3KB scsi_sense_cache 1056KB 1060KB virtio_scsi_cmd 16KB 16KB ---[ end trace 92ff4e73865c48e6 ]--- sgpool-128 8KB 8KB RIP: 0010:check_hung_uninterruptible_tasks kernel/hung_task.c:197 [inline] RIP: 0010:watchdog+0x492/0x1060 kernel/hung_task.c:289 sgpool-64 4KB 6KB sgpool-32 2KB 7KB Code: 44 89 b5 30 fe ff ff 48 c1 e8 03 4c 01 e8 48 89 85 e8 fd ff ff e9 f8 00 00 00 e8 29 f3 ff ff 48 8d 7b 10 48 89 f8 48 c1 e8 03 <42> 80 3c 28 00 0f 85 70 0a 00 00 4c 8b 73 10 bf 02 00 00 00 4c 89 sgpool-16 1KB 3KB RSP: 0018:ffff8881d7b37cc8 EFLAGS: 00010202 RAX: 01a5bfffffffff51 RBX: 0d2dfffffffffa7a RCX: ffffffff817f9259 RDX: 0000000000000000 RSI: ffffffff817f9147 RDI: 0d2dfffffffffa8a RBP: ffff8881d7b37f00 R08: ffff8881d7bae140 R09: ffffed103b5e5b5f sgpool-8 0KB 3KB mqueue_inode_cache 1KB 7KB R10: ffffed103b5e5b5f R11: ffff8881daf2dafb R12: 00000000000003d6 R13: dffffc0000000000 R14: 1ffff1103af66fbb R15: 00000000003fffd7 bio_post_read_ctx 14KB 15KB FS: 0000000000000000(0000) GS:ffff8881dae00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 bio-2 14KB 15KB jfs_mp 7KB 7KB nfs_commit_data 3KB 7KB CR2: 00000000004376a0 CR3: 000000016845e000 CR4: 00000000001406f0 nfs_write_data 32KB 32KB DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 ext4_system_zone 0KB 3KB --- This bug 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 bug report. See: https://goo.gl/tpsmEJ#bug-status-tracking for how to communicate with syzbot. syzbot can test patches for this bug, for details see: https://goo.gl/tpsmEJ#testing-patches