------------[ cut here ]------------
kernel BUG at net/core/skbuff.c:2193!
invalid opcode: 0000 [#1] PREEMPT SMP KASAN
Dumping ftrace buffer:
   (ftrace buffer empty)
Modules linked in:
CPU: 0 PID: 3752 Comm: syz-fuzzer Not tainted 4.4.146-g1396226 #15
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
task: ffff8801cccd4800 task.stack: ffff8800b0d78000
RIP: 0010:[<ffffffff82f419ca>]  [<ffffffff82f419ca>] skb_copy_and_csum_bits+0x69a/0x7d0 net/core/skbuff.c:2193
RSP: 0000:ffff8801db207258  EFLAGS: 00010206
RAX: ffff8801cccd4800 RBX: 000000002400ee2a RCX: 1ffff10012c5f209
RDX: 0000000000000100 RSI: ffffffff82f419ca RDI: ffff8800962f9048
RBP: ffff8801db2072d8 R08: 0000000000000000 R09: 0000000000000000
R10: 000000000000003c R11: ffff88009ca6f45f R12: 0000000000000000
R13: 0000000000000224 R14: 0000000000000000 R15: ffff8800962f9040
FS:  000000c42008b568(0000) GS:ffff8801db200000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00000000094f51b4 CR3: 00000001d1a33000 CR4: 00000000001606f0
Stack:
 ffffffff81292d4c ffff8800b4906344 ffffffff838cbf3c ffffffff81141a8d
 ffff8800b4906348 ffff88009ca6f1e8 2400ee2a0000003c 000001e80000003c
 0000003c0000003c ffff8800b4906280 0000000000000000 ffff8800b5ba3600
Call Trace:
 <IRQ> 
 [<ffffffff832ea74f>] icmp_glue_bits+0x7f/0x1e0 net/ipv4/icmp.c:344
 [<ffffffff83219816>] __ip_append_data.isra.45+0x1e76/0x2a70 net/ipv4/ip_output.c:1045
 [<ffffffff8321a4f4>] ip_append_data.part.47+0xe4/0x150 net/ipv4/ip_output.c:1195
 [<ffffffff83222b78>] ip_append_data+0x68/0x80 net/ipv4/ip_output.c:1184
 [<ffffffff832ea35e>] icmp_push_reply+0x19e/0x510 net/ipv4/icmp.c:362
 [<ffffffff832eecfa>] icmp_send+0xaca/0x13d0 net/ipv4/icmp.c:727
 [<ffffffff8321e5fa>] ip_fragment.constprop.51+0x1aa/0x200 net/ipv4/ip_output.c:511
 [<ffffffff8321eada>] ip_finish_output+0x48a/0xc00 net/ipv4/ip_output.c:286
 [<ffffffff83222869>] NF_HOOK_COND include/linux/netfilter.h:240 [inline]
 [<ffffffff83222869>] ip_output+0x219/0x4c0 net/ipv4/ip_output.c:362
 [<ffffffff8321f72b>] dst_output include/net/dst.h:498 [inline]
 [<ffffffff8321f72b>] ip_local_out+0x9b/0x180 net/ipv4/ip_output.c:119
 [<ffffffff83220a6e>] ip_queue_xmit+0x88e/0x1af0 net/ipv4/ip_output.c:461
 [<ffffffff83286711>] __tcp_transmit_skb+0x1691/0x2c50 net/ipv4/tcp_output.c:1034
 [<ffffffff832917f0>] tcp_transmit_skb net/ipv4/tcp_output.c:1047 [inline]
 [<ffffffff832917f0>] __tcp_retransmit_skb+0x640/0x1910 net/ipv4/tcp_output.c:2661
 [<ffffffff832931b3>] tcp_retransmit_skb+0x23/0x2c0 net/ipv4/tcp_output.c:2678
 [<ffffffff83298c0d>] tcp_retransmit_timer+0x7bd/0x1ed0 net/ipv4/tcp_timer.c:461
 [<ffffffff8329a511>] tcp_write_timer_handler+0x1f1/0x6f0 net/ipv4/tcp_timer.c:543
 [<ffffffff8329aaca>] tcp_write_timer+0xba/0xd0 net/ipv4/tcp_timer.c:561
 [<ffffffff81292d4c>] call_timer_fn+0x18c/0x870 kernel/time/timer.c:1185
 [<ffffffff81293a72>] __run_timers kernel/time/timer.c:1261 [inline]
 [<ffffffff81293a72>] run_timer_softirq+0x642/0xb90 kernel/time/timer.c:1444
 [<ffffffff838cbf3c>] __do_softirq+0x22c/0xa1a kernel/softirq.c:273
 [<ffffffff81141a8d>] invoke_softirq kernel/softirq.c:350 [inline]
 [<ffffffff81141a8d>] irq_exit+0x10d/0x140 kernel/softirq.c:391
 [<ffffffff838cb6a1>] exiting_irq arch/x86/include/asm/apic.h:652 [inline]
 [<ffffffff838cb6a1>] smp_apic_timer_interrupt+0x81/0xa0 arch/x86/kernel/apic/apic.c:926
 [<ffffffff838ca5e0>] apic_timer_interrupt+0xa0/0xb0 arch/x86/entry/entry_64.S:741
 <EOI> 
Code: 00 00 4d 8b 24 24 44 8b 6d d0 4d 85 e4 0f 85 1b ff ff ff 8b 5d b4 e8 f6 1d 41 fe 8b 45 bc 85 c0 0f 84 7f fe ff ff e8 e6 1d 41 fe <0f> 0b 8b 5d b4 e9 70 fe ff ff c7 45 b0 00 00 00 00 e9 8c fa ff 
RIP  [<ffffffff82f419ca>] skb_copy_and_csum_bits+0x69a/0x7d0 net/core/skbuff.c:2193
 RSP <ffff8801db207258>
---[ end trace 2e95d905b89b271e ]---