------------[ cut here ]------------
WARNING: CPU: 0 PID: 23410 at net/ipv4/tcp_timer.c:429 tcp_retransmit_timer+0x1ac5/0x2560 net/ipv4/tcp_timer.c:429
Kernel panic - not syncing: panic_on_warn set ...

CPU: 0 PID: 23410 Comm: syz-executor.5 Not tainted 4.14.144 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Call Trace:
 <IRQ>
 __dump_stack lib/dump_stack.c:17 [inline]
 dump_stack+0x138/0x197 lib/dump_stack.c:53
 panic+0x1f2/0x426 kernel/panic.c:182
 __warn.cold+0x2f/0x36 kernel/panic.c:546
 report_bug+0x216/0x254 lib/bug.c:186
 fixup_bug arch/x86/kernel/traps.c:177 [inline]
 fixup_bug arch/x86/kernel/traps.c:172 [inline]
 do_error_trap+0x1bb/0x310 arch/x86/kernel/traps.c:295
 do_invalid_op+0x1b/0x20 arch/x86/kernel/traps.c:314
 invalid_op+0x1b/0x40 arch/x86/entry/entry_64.S:963
RIP: 0010:tcp_retransmit_timer+0x1ac5/0x2560 net/ipv4/tcp_timer.c:429
RSP: 0018:ffff8880aee07cd8 EFLAGS: 00010206
RAX: ffff888056ebc180 RBX: ffff888057fa4240 RCX: 000000000000000a
RDX: 0000000000000100 RSI: ffff88807883280c RDI: ffff8880788329d8
RBP: ffff8880aee07d38 R08: 000000c6343906c6 R09: ffff88821fff8008
R10: ffff88821fff8010 R11: 0000000000000001 R12: ffff888078832000
R13: ffff88807883269a R14: ffff888078832030 R15: 0000000000000000
 tcp_write_timer_handler+0x479/0x7e0 net/ipv4/tcp_timer.c:579
 tcp_write_timer+0xd8/0x180 net/ipv4/tcp_timer.c:597
 call_timer_fn+0x161/0x670 kernel/time/timer.c:1279
 expire_timers kernel/time/timer.c:1318 [inline]
 __run_timers kernel/time/timer.c:1634 [inline]
 __run_timers kernel/time/timer.c:1602 [inline]
 run_timer_softirq+0x5b4/0x1570 kernel/time/timer.c:1647
 __do_softirq+0x244/0x9a0 kernel/softirq.c:288
 do_softirq_own_stack+0x2a/0x40 arch/x86/entry/entry_64.S:1015
 </IRQ>
 do_softirq.part.0+0x10e/0x160 kernel/softirq.c:332
 do_softirq kernel/softirq.c:324 [inline]
 __local_bh_enable_ip+0x154/0x1a0 kernel/softirq.c:185
 local_bh_enable include/linux/bottom_half.h:32 [inline]
 rcu_read_unlock_bh include/linux/rcupdate.h:725 [inline]
 ip_finish_output2+0x7ae/0x14a0 net/ipv4/ip_output.c:231
 ip_finish_output+0x56d/0xc60 net/ipv4/ip_output.c:317
 NF_HOOK_COND include/linux/netfilter.h:239 [inline]
 ip_mc_output+0x24a/0xd40 net/ipv4/ip_output.c:390
 dst_output include/net/dst.h:462 [inline]
 ip_local_out+0x97/0x170 net/ipv4/ip_output.c:124
 ip_send_skb+0x3e/0xc0 net/ipv4/ip_output.c:1418
 udp_send_skb+0x53f/0xb90 net/ipv4/udp.c:833
 udp_sendmsg+0x16df/0x1da0 net/ipv4/udp.c:1057
 inet_sendmsg+0x122/0x500 net/ipv4/af_inet.c:762
 sock_sendmsg_nosec net/socket.c:646 [inline]
 sock_sendmsg+0xce/0x110 net/socket.c:656
 ___sys_sendmsg+0x349/0x840 net/socket.c:2062
 __sys_sendmmsg+0x152/0x3a0 net/socket.c:2152
 SYSC_sendmmsg net/socket.c:2183 [inline]
 SyS_sendmmsg+0x35/0x60 net/socket.c:2178
 do_syscall_64+0x1e8/0x640 arch/x86/entry/common.c:292
 entry_SYSCALL_64_after_hwframe+0x42/0xb7
RIP: 0033:0x4598e9
RSP: 002b:00007f332afefc78 EFLAGS: 00000246 ORIG_RAX: 0000000000000133
RAX: ffffffffffffffda RBX: 0000000000000004 RCX: 00000000004598e9
RDX: 000000000800001d RSI: 0000000020007fc0 RDI: 0000000000000005
RBP: 000000000075c070 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 00007f332aff06d4
R13: 00000000004c70a7 R14: 00000000004dc768 R15: 00000000ffffffff
Kernel Offset: disabled
Rebooting in 86400 seconds..