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=-0.7 required=3.0 tests=FROM_LOCAL_HEX, HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,SPF_PASS,URIBL_BLOCKED autolearn=unavailable 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 408ABC41518 for ; Fri, 25 Jan 2019 00:44:09 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 19668218D9 for ; Fri, 25 Jan 2019 00:44:09 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727955AbfAYAoE (ORCPT ); Thu, 24 Jan 2019 19:44:04 -0500 Received: from mail-io1-f72.google.com ([209.85.166.72]:52894 "EHLO mail-io1-f72.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726271AbfAYAoE 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X-Received: by 2002:a6b:d11a:: with SMTP id l26mr7370140iob.34.1548377043057; Thu, 24 Jan 2019 16:44:03 -0800 (PST) Date: Thu, 24 Jan 2019 16:44:03 -0800 In-Reply-To: <0000000000000cf22a058011d494@google.com> X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <000000000000a1440c05803d9f9b@google.com> Subject: Re: general protection fault in nf_ct_gre_keymap_flush From: syzbot To: coreteam@netfilter.org, davem@davemloft.net, fw@strlen.de, kadlec@blackhole.kfki.hu, linux-kernel@vger.kernel.org, netdev@vger.kernel.org, netfilter-devel@vger.kernel.org, pablo@netfilter.org, syzkaller-bugs@googlegroups.com, xiyou.wangcong@gmail.com Content-Type: text/plain; charset="UTF-8"; format=flowed; delsp=yes Sender: netdev-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: netdev@vger.kernel.org syzbot has found a reproducer for the following crash on: HEAD commit: 755d01d17697 Add linux-next specific files for 20190124 git tree: linux-next console output: https://syzkaller.appspot.com/x/log.txt?x=128f88c4c00000 kernel config: https://syzkaller.appspot.com/x/.config?x=35842b82e8cde424 dashboard link: https://syzkaller.appspot.com/bug?extid=fcee88b2d87f0539dfe9 compiler: gcc (GCC) 9.0.0 20181231 (experimental) syz repro: https://syzkaller.appspot.com/x/repro.syz?x=13e5f517400000 C reproducer: https://syzkaller.appspot.com/x/repro.c?x=17da1cef400000 IMPORTANT: if you fix the bug, please add the following tag to the commit: Reported-by: syzbot+fcee88b2d87f0539dfe9@syzkaller.appspotmail.com 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: 0 PID: 7374 Comm: syz-executor189 Not tainted 5.0.0-rc3-next-20190124 #19 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RIP: 0010:nf_ct_gre_keymap_flush+0xb9/0x2f0 net/netfilter/nf_conntrack_proto_gre.c:65 Code: 4c 89 f0 48 c1 e8 03 42 80 3c 20 00 0f 85 2b 02 00 00 4c 8b bb f8 16 00 00 48 b8 00 00 00 00 00 fc ff df 4c 89 f9 48 c1 e9 03 <80> 3c 01 00 0f 85 fc 01 00 00 4c 3b bd 68 ff ff ff 4d 8b 27 0f 84 RSP: 0018:ffff88808a6e7698 EFLAGS: 00010246 RAX: dffffc0000000000 RBX: ffff8880930082c0 RCX: 0000000000000000 RDX: 1ffffffff146e05a RSI: 0000000000000004 RDI: ffff88808a6e7600 RBP: ffff88808a6e7748 R08: 1ffff110114dcec0 R09: ffffed10114dcec1 R10: ffffed10114dcec0 R11: 0000000000000003 R12: dffffc0000000000 R13: ffff88808a6e7858 R14: ffff8880930099b8 R15: 0000000000000000 FS: 00007febe4d2d700(0000) GS:ffff8880ae600000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007febe4d2cdb8 CR3: 00000000901a3000 CR4: 00000000001406f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: nf_conntrack_proto_pernet_fini+0x16/0x1a net/netfilter/nf_conntrack_proto.c:617 nf_conntrack_cleanup_net_list+0x204/0x330 net/netfilter/nf_conntrack_core.c:2183 nf_conntrack_cleanup_net+0x1c5/0x270 net/netfilter/nf_conntrack_core.c:2156 nf_conntrack_pernet_init net/netfilter/nf_conntrack_standalone.c:1122 [inline] nf_conntrack_pernet_init+0xc3f/0xf00 net/netfilter/nf_conntrack_standalone.c:1091 ops_init+0x109/0x5d0 net/core/net_namespace.c:129 setup_net+0x38f/0x940 net/core/net_namespace.c:314 copy_net_ns+0x2ae/0x4b0 net/core/net_namespace.c:437 create_new_namespaces+0x4ce/0x930 kernel/nsproxy.c:107 unshare_nsproxy_namespaces+0xc2/0x200 kernel/nsproxy.c:206 ksys_unshare+0x6d7/0xfb0 kernel/fork.c:2550 __do_sys_unshare kernel/fork.c:2618 [inline] __se_sys_unshare kernel/fork.c:2616 [inline] __x64_sys_unshare+0x31/0x40 kernel/fork.c:2616 do_syscall_64+0x1a3/0x800 arch/x86/entry/common.c:290 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x449009 Code: e8 6c 14 03 00 48 83 c4 18 c3 0f 1f 80 00 00 00 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 0f 83 cb 05 fc ff c3 66 2e 0f 1f 84 00 00 00 00 RSP: 002b:00007febe4d2ccf8 EFLAGS: 00000246 ORIG_RAX: 0000000000000110 RAX: ffffffffffffffda RBX: 00000000006e59f8 RCX: 0000000000449009 RDX: 0000000000449009 RSI: 0000000000449009 RDI: 0000000040000000 RBP: 00000000006e59f0 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00000000006e59fc R13: 00007ffeec84fdaf R14: 00007febe4d2d9c0 R15: 0000000000000001 Modules linked in: ---[ end trace e72b60d04a028cfc ]--- RIP: 0010:nf_ct_gre_keymap_flush+0xb9/0x2f0 net/netfilter/nf_conntrack_proto_gre.c:65 Code: 4c 89 f0 48 c1 e8 03 42 80 3c 20 00 0f 85 2b 02 00 00 4c 8b bb f8 16 00 00 48 b8 00 00 00 00 00 fc ff df 4c 89 f9 48 c1 e9 03 <80> 3c 01 00 0f 85 fc 01 00 00 4c 3b bd 68 ff ff ff 4d 8b 27 0f 84 RSP: 0018:ffff88808a6e7698 EFLAGS: 00010246 RAX: dffffc0000000000 RBX: ffff8880930082c0 RCX: 0000000000000000 RDX: 1ffffffff146e05a RSI: 0000000000000004 RDI: ffff88808a6e7600 RBP: ffff88808a6e7748 R08: 1ffff110114dcec0 R09: ffffed10114dcec1 R10: ffffed10114dcec0 R11: 0000000000000003 R12: dffffc0000000000 R13: ffff88808a6e7858 R14: ffff8880930099b8 R15: 0000000000000000 FS: 00007febe4d2d700(0000) GS:ffff8880ae600000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007febe4d2cdb8 CR3: 00000000901a3000 CR4: 00000000001406f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400