------------[ cut here ]------------ hook not found, pf 5 num 0 WARNING: CPU: 1 PID: 9032 at net/netfilter/core.c:514 __nf_unregister_net_hook+0x30a/0x700 net/netfilter/core.c:514 Modules linked in: CPU: 1 UID: 0 PID: 9032 Comm: syz.0.994 Not tainted syzkaller #0 PREEMPT(full) Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/02/2025 RIP: 0010:__nf_unregister_net_hook+0x30a/0x700 net/netfilter/core.c:514 Code: d5 18 f8 05 01 90 48 8b 44 24 10 0f b6 04 28 84 c0 0f 85 e3 03 00 00 41 8b 17 48 c7 c7 00 72 72 8c 44 89 ee e8 67 4f 14 f8 90 <0f> 0b 90 90 e9 d8 01 00 00 e8 a8 17 d7 01 89 c3 31 ff 89 c6 e8 fd RSP: 0018:ffffc9000c396938 EFLAGS: 00010246 RAX: a02a0e56549ab800 RBX: ffff8880583d1480 RCX: ffff888059800000 RDX: 0000000000000000 RSI: 0000000000000001 RDI: 0000000000000002 RBP: dffffc0000000000 R08: ffff8880b8924293 R09: 1ffff11017124852 R10: dffffc0000000000 R11: ffffed1017124853 R12: ffff88807acf2480 R13: 0000000000000005 R14: ffff88802701a488 R15: ffff88807796ae3c FS: 00007fba157656c0(0000) GS:ffff888126240000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000555576f79808 CR3: 000000007f6c4000 CR4: 00000000003526f0 Call Trace: nft_unregister_flowtable_ops net/netfilter/nf_tables_api.c:8979 [inline] nft_flowtable_event net/netfilter/nf_tables_api.c:9758 [inline] __nf_tables_flowtable_event+0x5bf/0x8c0 net/netfilter/nf_tables_api.c:9803 nf_tables_flowtable_event+0x103/0x160 net/netfilter/nf_tables_api.c:9834 notifier_call_chain+0x1b6/0x3e0 kernel/notifier.c:85 call_netdevice_notifiers_extack net/core/dev.c:2267 [inline] call_netdevice_notifiers net/core/dev.c:2281 [inline] unregister_netdevice_many_notify+0x1860/0x2390 net/core/dev.c:12333 unregister_netdevice_many net/core/dev.c:12396 [inline] unregister_netdevice_queue+0x33c/0x380 net/core/dev.c:12210 unregister_netdevice include/linux/netdevice.h:3390 [inline] hsr_dev_finalize+0x707/0xaa0 net/hsr/hsr_device.c:800 hsr_newlink+0x8ad/0x9f0 net/hsr/hsr_netlink.c:128 rtnl_newlink_create+0x310/0xb00 net/core/rtnetlink.c:3833 __rtnl_newlink net/core/rtnetlink.c:3950 [inline] rtnl_newlink+0x16e4/0x1c80 net/core/rtnetlink.c:4065 rtnetlink_rcv_msg+0x7cf/0xb70 net/core/rtnetlink.c:6951 netlink_rcv_skb+0x208/0x470 net/netlink/af_netlink.c:2550 netlink_unicast_kernel net/netlink/af_netlink.c:1318 [inline] netlink_unicast+0x82f/0x9e0 net/netlink/af_netlink.c:1344 netlink_sendmsg+0x805/0xb30 net/netlink/af_netlink.c:1894 sock_sendmsg_nosec net/socket.c:727 [inline] __sock_sendmsg+0x21c/0x270 net/socket.c:742 ____sys_sendmsg+0x505/0x830 net/socket.c:2630 ___sys_sendmsg+0x21f/0x2a0 net/socket.c:2684 __sys_sendmsg net/socket.c:2716 [inline] __do_sys_sendmsg net/socket.c:2721 [inline] __se_sys_sendmsg net/socket.c:2719 [inline] __x64_sys_sendmsg+0x19b/0x260 net/socket.c:2719 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0xfa/0xfa0 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7fba1498efc9 Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 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 73 01 c3 48 c7 c1 a8 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007fba15765038 EFLAGS: 00000246 ORIG_RAX: 000000000000002e RAX: ffffffffffffffda RBX: 00007fba14be5fa0 RCX: 00007fba1498efc9 RDX: 0000000000000000 RSI: 00002000000000c0 RDI: 0000000000000005 RBP: 00007fba14a11f91 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007fba14be6038 R14: 00007fba14be5fa0 R15: 00007ffcbfaff8c8