From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1031385AbeEZJNE (ORCPT ); Sat, 26 May 2018 05:13:04 -0400 Received: from mail-io0-f199.google.com ([209.85.223.199]:39278 "EHLO mail-io0-f199.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1031278AbeEZJNC (ORCPT ); Sat, 26 May 2018 05:13:02 -0400 X-Google-Smtp-Source: ADUXVKI0q3LsnqhgHyRXYkkzBNjTh5rMrfO4AgsQ/Zf/NtcSR5qQTKfbJSYEbyPaAydsGOwkoxLFHZhcrtYx/n7BhiTDHa5WjF5v MIME-Version: 1.0 Date: Sat, 26 May 2018 02:13:01 -0700 X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <00000000000098e65b056d184a11@google.com> Subject: general protection fault in bpf_tcp_close From: syzbot To: ast@kernel.org, daniel@iogearbox.net, linux-kernel@vger.kernel.org, netdev@vger.kernel.org, syzkaller-bugs@googlegroups.com Content-Type: text/plain; charset="UTF-8"; format=flowed; delsp=yes Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Hello, syzbot found the following crash on: HEAD commit: fd0bfa8d6e04 Merge branch 'bpf-af-xdp-cleanups' git tree: bpf-next console output: https://syzkaller.appspot.com/x/log.txt?x=11da9427800000 kernel config: https://syzkaller.appspot.com/x/.config?x=b632d8e2c2ab2c1 dashboard link: https://syzkaller.appspot.com/bug?extid=0ce137753c78f7b6acc1 compiler: gcc (GCC) 8.0.1 20180413 (experimental) Unfortunately, I don't have any reproducer for this crash yet. IMPORTANT: if you fix the bug, please add the following tag to the commit: Reported-by: syzbot+0ce137753c78f7b6acc1@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] SMP KASAN Dumping ftrace buffer: (ftrace buffer empty) Modules linked in: CPU: 0 PID: 12139 Comm: syz-executor2 Not tainted 4.17.0-rc4+ #17 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RIP: 0010:__hlist_del include/linux/list.h:649 [inline] RIP: 0010:hlist_del_rcu include/linux/rculist.h:427 [inline] RIP: 0010:bpf_tcp_close+0x7d2/0xf80 kernel/bpf/sockmap.c:271 RSP: 0018:ffff8801a8f8ef70 EFLAGS: 00010a02 RAX: ffffed00351f1dfd RBX: dffffc0000000000 RCX: dead000000000200 RDX: 0000000000000000 RSI: 1bd5a00000000040 RDI: ffff8801cb710910 RBP: ffff8801a8f8f110 R08: ffffed003350ac9d R09: ffffed003350ac9c R10: ffffed003350ac9c R11: ffff88019a8564e3 R12: ffff8801cb710380 R13: ffff8801b17ea6e0 R14: ffff8801cb710398 R15: ffff8801cb710900 FS: 00007f9890c43700(0000) GS:ffff8801dae00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007fde1a668000 CR3: 000000019dca2000 CR4: 00000000001406f0 DR0: 00000000200001c0 DR1: 00000000200001c0 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000600 Call Trace: inet_release+0x104/0x1f0 net/ipv4/af_inet.c:427 inet6_release+0x50/0x70 net/ipv6/af_inet6.c:459 sock_release+0x96/0x1b0 net/socket.c:594 sock_close+0x16/0x20 net/socket.c:1149 __fput+0x34d/0x890 fs/file_table.c:209 ____fput+0x15/0x20 fs/file_table.c:243 task_work_run+0x1e4/0x290 kernel/task_work.c:113 exit_task_work include/linux/task_work.h:22 [inline] do_exit+0x1aee/0x2730 kernel/exit.c:865 do_group_exit+0x16f/0x430 kernel/exit.c:968 get_signal+0x886/0x1960 kernel/signal.c:2469 do_signal+0x98/0x2040 arch/x86/kernel/signal.c:810 exit_to_usermode_loop+0x28a/0x310 arch/x86/entry/common.c:162 prepare_exit_to_usermode arch/x86/entry/common.c:196 [inline] syscall_return_slowpath arch/x86/entry/common.c:265 [inline] do_syscall_64+0x6ac/0x800 arch/x86/entry/common.c:290 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x455a09 RSP: 002b:00007f9890c42ce8 EFLAGS: 00000246 ORIG_RAX: 00000000000000ca RAX: fffffffffffffe00 RBX: 000000000072bec8 RCX: 0000000000455a09 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 000000000072bec8 RBP: 000000000072bec8 R08: 0000000000000000 R09: 000000000072bea0 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007ffcb48ac3ff R14: 00007f9890c439c0 R15: 0000000000000000 Code: ff 48 c1 e9 03 80 3c 19 00 0f 85 a9 05 00 00 49 8b 4f 18 48 8b 85 98 fe ff ff 48 89 ce c6 00 00 48 c1 ee 03 48 89 95 d8 fe ff ff <80> 3c 1e 00 0f 85 c6 05 00 00 48 8b 85 98 fe ff ff 48 85 d2 48 RIP: __hlist_del include/linux/list.h:649 [inline] RSP: ffff8801a8f8ef70 RIP: hlist_del_rcu include/linux/rculist.h:427 [inline] RSP: ffff8801a8f8ef70 RIP: bpf_tcp_close+0x7d2/0xf80 kernel/bpf/sockmap.c:271 RSP: ffff8801a8f8ef70 ---[ end trace e81227e93c7e7b75 ]--- --- 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.