------------[ cut here ]------------
WARNING: CPU: 0 PID: 465 at net/ipv4/route.c:1243 ip_rt_bug+0x11/0x20 net/ipv4/route.c:1242
Kernel panic - not syncing: panic_on_warn set ...
CPU: 0 PID: 465 Comm: syz-executor.3 Not tainted 5.7.0-rc5-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:ip_rt_bug+0x11/0x20 net/ipv4/route.c:1243
Code: ff ff e8 52 4b 1f fb e9 ef fe ff ff e8 48 4b 1f fb e9 59 ff ff ff 0f 1f 00 55 48 89 d5 e8 e7 e1 e0 fa 48 89 ef e8 1f 41 8a ff <0f> 0b 31 c0 5d c3 66 0f 1f 84 00 00 00 00 00 41 54 49 89 fc e8 c6
RSP: 0018:ffffc900053468e0 EFLAGS: 00010216
RAX: 0000000000040000 RBX: 0000000000000000 RCX: ffffc9000fce0000
RDX: 000000000000e3f4 RSI: ffffffff869250d1 RDI: 0000000000000286
RBP: ffff8880a935ae80 R08: 0000000000000000 R09: ffffed1015cc7164
R10: ffff8880ae638b1b R11: ffffed1015cc7163 R12: ffff88809f5be900
R13: ffff8880a935ae80 R14: ffff8880697e4cc0 R15: ffff8880a935aed8
 dst_output include/net/dst.h:435 [inline]
 ip_local_out+0xaf/0x1a0 net/ipv4/ip_output.c:125
 ip_send_skb+0x3e/0xe0 net/ipv4/ip_output.c:1560
 ip_push_pending_frames+0x5f/0x80 net/ipv4/ip_output.c:1580
 icmp_push_reply+0x33f/0x490 net/ipv4/icmp.c:390
 __icmp_send+0xc44/0x14a0 net/ipv4/icmp.c:740
 ipv4_send_dest_unreach net/ipv4/route.c:1223 [inline]
 ipv4_link_failure+0x4f3/0x8b0 net/ipv4/route.c:1230
 dst_link_failure include/net/dst.h:418 [inline]
 vti_xmit net/ipv4/ip_vti.c:274 [inline]
 vti_tunnel_xmit+0x76d/0x19a0 net/ipv4/ip_vti.c:310
 __netdev_start_xmit include/linux/netdevice.h:4605 [inline]
 netdev_start_xmit include/linux/netdevice.h:4619 [inline]
 xmit_one net/core/dev.c:3545 [inline]
 dev_hard_start_xmit+0x1a4/0x9b0 net/core/dev.c:3561
 __dev_queue_xmit+0x25e1/0x3090 net/core/dev.c:4120
 neigh_output include/net/neighbour.h:510 [inline]
 ip_finish_output2+0x909/0x2610 net/ipv4/ip_output.c:228
 __ip_finish_output net/ipv4/ip_output.c:306 [inline]
 __ip_finish_output+0x5f3/0xbd0 net/ipv4/ip_output.c:288
 ip_finish_output+0x34/0x1f0 net/ipv4/ip_output.c:316
 NF_HOOK_COND include/linux/netfilter.h:296 [inline]
 ip_output+0x1fe/0x620 net/ipv4/ip_output.c:430
 dst_output include/net/dst.h:435 [inline]
 ip_local_out+0xaf/0x1a0 net/ipv4/ip_output.c:125
 ip_send_skb+0x3e/0xe0 net/ipv4/ip_output.c:1560
 udp_send_skb.isra.0+0x6cb/0x11c0 net/ipv4/udp.c:891
 udp_sendmsg+0x1ea8/0x2820 net/ipv4/udp.c:1178
 udpv6_sendmsg+0x14d6/0x2b50 net/ipv6/udp.c:1286
 inet6_sendmsg+0x99/0xe0 net/ipv6/af_inet6.c:634
 sock_sendmsg_nosec net/socket.c:652 [inline]
 sock_sendmsg+0xcf/0x120 net/socket.c:672
 ____sys_sendmsg+0x32f/0x810 net/socket.c:2352
 ___sys_sendmsg+0x100/0x170 net/socket.c:2406
 __sys_sendmmsg+0x195/0x480 net/socket.c:2496
 __do_sys_sendmmsg net/socket.c:2525 [inline]
 __se_sys_sendmmsg net/socket.c:2522 [inline]
 __x64_sys_sendmmsg+0x99/0x100 net/socket.c:2522
 do_syscall_64+0xf6/0x7d0 arch/x86/entry/common.c:295
 entry_SYSCALL_64_after_hwframe+0x49/0xb3
RIP: 0033:0x45ca29
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:00007fd756909c78 EFLAGS: 00000246 ORIG_RAX: 0000000000000133
RAX: ffffffffffffffda RBX: 00000000004fc580 RCX: 000000000045ca29
RDX: 0000000000000002 RSI: 0000000020000000 RDI: 0000000000000005
RBP: 000000000078bf00 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 00000000ffffffff
R13: 00000000000008dd R14: 00000000004cba1f R15: 00007fd75690a6d4
Kernel Offset: disabled
Rebooting in 86400 seconds..