------------[ cut here ]------------
kernel BUG at net/ipv4/tcp_output.c:2817!
invalid opcode: 0000 [#1] SMP KASAN
Dumping ftrace buffer:
   (ftrace buffer empty)
Modules linked in:
CPU: 0 PID: 2954 Comm: syz-fuzzer Not tainted 4.13.0-rc6+ #34
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
task: ffff8801d203e540 task.stack: ffff8801bf8a0000
RIP: 0010:__tcp_retransmit_skb+0x1d18/0x1fa0 net/ipv4/tcp_output.c:2817
RSP: 0000:ffff8801db207408 EFLAGS: 00010206
RAX: ffff8801d203e540 RBX: 0000000000000001 RCX: 00000000f35e6fd7
RDX: 0000000000000100 RSI: ffff8801cc898d00 RDI: ffff8801cc898d2c
RBP: ffff8801db2075c8 R08: ffff88021fff901c R09: ffff88021fff9008
R10: 0000000000000000 R11: ffff88021fff901d R12: ffff8801cc898d86
R13: 00000000f35e7367 R14: ffff8801cc898d00 R15: ffff8801cd1ba000
FS:  00007f1ae9ba1700(0000) GS:ffff8801db200000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000000ca0cd8 CR3: 00000001ceec7000 CR4: 00000000001406f0
Call Trace:
 <IRQ>
 tcp_retransmit_skb+0x2e/0x230 net/ipv4/tcp_output.c:2891
 tcp_retransmit_timer+0xcee/0x2a10 net/ipv4/tcp_timer.c:476
 tcp_write_timer_handler+0x335/0x810 net/ipv4/tcp_timer.c:561
 tcp_write_timer+0x146/0x160 net/ipv4/tcp_timer.c:579
 call_timer_fn+0x233/0x830 kernel/time/timer.c:1268
 expire_timers kernel/time/timer.c:1307 [inline]
 __run_timers+0x7fd/0xb90 kernel/time/timer.c:1601
 run_timer_softirq+0x21/0x80 kernel/time/timer.c:1614
 __do_softirq+0x2f5/0xba3 kernel/softirq.c:284
 invoke_softirq kernel/softirq.c:364 [inline]
 irq_exit+0x1cc/0x200 kernel/softirq.c:405
 exiting_irq arch/x86/include/asm/apic.h:638 [inline]
 smp_apic_timer_interrupt+0x76/0xa0 arch/x86/kernel/apic/apic.c:1044
 apic_timer_interrupt+0x93/0xa0 arch/x86/entry/entry_64.S:702
RIP: 0033:0x4246e7
RSP: 002b:00007f1ae9ba0c08 EFLAGS: 00000212 ORIG_RAX: ffffffffffffff10
RAX: 00007f1aecbe1398 RBX: 00007f1aecb0d7d0 RCX: 000000c420062900
RDX: 0000000000000003 RSI: 0000000000f1d040 RDI: 000000c000000000
RBP: 00007f1ae9ba0c88 R08: 0000000000008c00 R09: 0000000000000001
R10: 0000000000b65720 R11: 0000000000000006 R12: 0000000000000000
R13: 00000000000000fb R14: 00000000000000fb R15: 0000000000000000
 </IRQ>
Code: ff e8 bd 07 95 fd e9 4b fb ff ff 48 8b bd a0 fe ff ff e8 0c 08 95 fd e9 fc f8 ff ff e8 02 08 95 fd e9 53 f6 ff ff e8 58 12 61 fd <0f> 0b e8 f1 07 95 fd e9 9e e5 ff ff 4c 89 e7 e8 84 07 95 fd e9 
RIP: __tcp_retransmit_skb+0x1d18/0x1fa0 net/ipv4/tcp_output.c:2817 RSP: ffff8801db207408
---[ end trace 56f7bd41b7adc14f ]---