WARNING: CPU: 1 PID: 15065 at drivers/net/ipvlan/ipvlan_main.c:65 ipvlan_unregister_nf_hook.cold+0x11/0x18 drivers/net/ipvlan/ipvlan_main.c:65
Kernel panic - not syncing: panic_on_warn set ...

CPU: 1 PID: 15065 Comm: syz-executor.5 Not tainted 4.19.211-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+0x1fc/0x2ef lib/dump_stack.c:118
 panic+0x26a/0x50e kernel/panic.c:186
 __warn.cold+0x20/0x5a kernel/panic.c:541
 report_bug+0x262/0x2b0 lib/bug.c:183
 fixup_bug arch/x86/kernel/traps.c:178 [inline]
 fixup_bug arch/x86/kernel/traps.c:173 [inline]
 do_error_trap+0x1d7/0x310 arch/x86/kernel/traps.c:296
 invalid_op+0x14/0x20 arch/x86/entry/entry_64.S:1038
RIP: 0010:ipvlan_unregister_nf_hook.cold+0x11/0x18 drivers/net/ipvlan/ipvlan_main.c:65
Code: c6 08 0f b7 f6 e8 87 d1 f2 ff e9 a7 c3 42 fc 4c 89 e7 e8 df 7b 97 f9 eb d6 e8 08 a0 61 f9 48 c7 c7 80 8e da 88 e8 67 d1 f2 ff <0f> 0b e9 08 ef 42 fc e8 f0 9f 61 f9 48 c7 c7 40 ac da 88 e8 4f d1
RSP: 0018:ffff88804586f020 EFLAGS: 00010286
RAX: 0000000000000024 RBX: 0000000000000000 RCX: 0000000000000000
RDX: 0000000000012fff RSI: ffffffff814dff01 RDI: ffffed1008b0ddf6
RBP: ffff888041aa0380 R08: 0000000000000024 R09: 0000000000000000
IPVS: ftp: loaded support on port[0] = 21
R10: 0000000000000005 R11: 0000000000000000 R12: ffff8880a560cd40
R13: ffff8880a8be24c0 R14: 00000000ffffffff R15: 0000000000000000
 ipvlan_set_port_mode+0x53a/0x650 drivers/net/ipvlan/ipvlan_main.c:106
 ipvlan_nl_changelink+0x1a6/0x3a0 drivers/net/ipvlan/ipvlan_main.c:518
 rtnl_newlink+0xccb/0x15c0 net/core/rtnetlink.c:3059
 rtnetlink_rcv_msg+0x453/0xb80 net/core/rtnetlink.c:4782
 netlink_rcv_skb+0x160/0x440 net/netlink/af_netlink.c:2463
 netlink_unicast_kernel net/netlink/af_netlink.c:1325 [inline]
 netlink_unicast+0x4d5/0x690 net/netlink/af_netlink.c:1351
 netlink_sendmsg+0x6c3/0xc50 net/netlink/af_netlink.c:1917
 sock_sendmsg_nosec net/socket.c:651 [inline]
 sock_sendmsg+0xc3/0x120 net/socket.c:661
 ___sys_sendmsg+0x7bb/0x8e0 net/socket.c:2227
 __sys_sendmsg net/socket.c:2265 [inline]
 __do_sys_sendmsg net/socket.c:2274 [inline]
 __se_sys_sendmsg net/socket.c:2272 [inline]
 __x64_sys_sendmsg+0x132/0x220 net/socket.c:2272
 do_syscall_64+0xf9/0x620 arch/x86/entry/common.c:293
 entry_SYSCALL_64_after_hwframe+0x49/0xbe
RIP: 0033:0x7fc86367aa39
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 bc ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007fc860bf0188 EFLAGS: 00000246 ORIG_RAX: 000000000000002e
RAX: ffffffffffffffda RBX: 00007fc86377df60 RCX: 00007fc86367aa39
RDX: 0000000022004080 RSI: 0000000020000080 RDI: 0000000000000004
RBP: 00007fc8636d4c5f R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007ffc6a07104f R14: 00007fc860bf0300 R15: 0000000000022000
Kernel Offset: disabled
Rebooting in 86400 seconds..