Hello, syzbot found the following crash on: HEAD commit: ac935d22 Add linux-next specific files for 20200415 git tree: linux-next console output: https://syzkaller.appspot.com/x/log.txt?x=1640c1bbe00000 kernel config: https://syzkaller.appspot.com/x/.config?x=bc498783097e9019 dashboard link: https://syzkaller.appspot.com/bug?extid=01d3835be1106c3083ba compiler: gcc (GCC) 9.0.0 20181231 (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+01d3835be1106c3083ba@xxxxxxxxxxxxxxxxxxxxxxxxx ------------[ cut here ]------------ hook not found, pf 2 num 4 WARNING: CPU: 1 PID: 25658 at net/netfilter/core.c:413 __nf_unregister_net_hook+0x1ef/0x470 net/netfilter/core.c:413 Kernel panic - not syncing: panic_on_warn set ... CPU: 1 PID: 25658 Comm: syz-executor.0 Not tainted 5.7.0-rc1-next-20200415-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Call Trace: __dump_stack lib/dump_stack.c:77 [inline] dump_stack+0x188/0x20d lib/dump_stack.c:118 panic+0x2e3/0x75c kernel/panic.c:221 __warn.cold+0x2f/0x35 kernel/panic.c:582 report_bug+0x27b/0x2f0 lib/bug.c:195 fixup_bug arch/x86/kernel/traps.c:175 [inline] fixup_bug arch/x86/kernel/traps.c:170 [inline] do_error_trap+0x12b/0x220 arch/x86/kernel/traps.c:267 do_invalid_op+0x32/0x40 arch/x86/kernel/traps.c:286 invalid_op+0x23/0x30 arch/x86/entry/entry_64.S:1027 RIP: 0010:__nf_unregister_net_hook+0x1ef/0x470 net/netfilter/core.c:413 Code: 0f b6 14 02 4c 89 f8 83 e0 07 83 c0 03 38 d0 7c 08 84 d2 0f 85 83 02 00 00 8b 53 1c 89 ee 48 c7 c7 c0 cd e1 88 e8 19 4e e5 fa <0f> 0b e9 ec 00 00 00 e8 35 19 14 fb 48 8b 04 24 48 c1 e0 04 49 8d RSP: 0018:ffffc900056b73b8 EFLAGS: 00010282 RAX: 0000000000000000 RBX: ffff888094aa6600 RCX: 0000000000000000 RDX: 000000000000ad97 RSI: ffffffff815ce211 RDI: fffff52000ad6e69 RBP: 0000000000000002 R08: ffff888046f3c100 R09: fffffbfff1862745 R10: ffffffff8c313a27 R11: fffffbfff1862744 R12: ffff88808e97cfa8 R13: 0000000000000000 R14: ffff8880931a2300 R15: ffff888094aa661c nf_unregister_net_hook+0x59/0xa0 net/netfilter/core.c:431 nft_unregister_basechain_hooks net/netfilter/nf_tables_api.c:206 [inline] nft_table_disable+0x262/0x2c0 net/netfilter/nf_tables_api.c:835 nf_tables_table_disable net/netfilter/nf_tables_api.c:868 [inline] nf_tables_commit+0x2cf8/0x3a20 net/netfilter/nf_tables_api.c:7350 nfnetlink_rcv_batch+0xcd7/0x1610 net/netfilter/nfnetlink.c:485 nfnetlink_rcv_skb_batch net/netfilter/nfnetlink.c:543 [inline] nfnetlink_rcv+0x3af/0x420 net/netfilter/nfnetlink.c:561 netlink_unicast_kernel net/netlink/af_netlink.c:1303 [inline] netlink_unicast+0x537/0x740 net/netlink/af_netlink.c:1329 netlink_sendmsg+0x882/0xe10 net/netlink/af_netlink.c:1918 sock_sendmsg_nosec net/socket.c:652 [inline] sock_sendmsg+0xcf/0x120 net/socket.c:672 ____sys_sendmsg+0x6bf/0x7e0 net/socket.c:2362 ___sys_sendmsg+0x100/0x170 net/socket.c:2416 __sys_sendmsg+0xec/0x1b0 net/socket.c:2449 do_syscall_64+0xf6/0x7d0 arch/x86/entry/common.c:295 entry_SYSCALL_64_after_hwframe+0x49/0xb3 RIP: 0033:0x45c829 Code: 0d b7 fb ff c3 66 2e 0f 1f 84 00 00 00 00 00 66 90 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 db b6 fb ff c3 66 2e 0f 1f 84 00 00 00 00 RSP: 002b:00007fd703062c78 EFLAGS: 00000246 ORIG_RAX: 000000000000002e RAX: ffffffffffffffda RBX: 00000000004fe200 RCX: 000000000045c829 RDX: 0000000000000000 RSI: 000000002000c2c0 RDI: 0000000000000005 RBP: 000000000078bf00 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00000000ffffffff R13: 000000000000095d R14: 00000000004cc104 R15: 00007fd7030636d4 Kernel Offset: disabled Rebooting in 86400 seconds.. --- 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@xxxxxxxxxxxxxxxx. syzbot will keep track of this bug report. See: https://goo.gl/tpsmEJ#status for how to communicate with syzbot.
