audit: type=1326 audit(2000000047.330:1107): auid=4294967295 uid=0 gid=0 ses=4294967295 subj=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 pid=20258 comm="syz-executor.2" exe="/root/syz-executor.2" sig=9 arch=c000003e syscall=228 compat=0 ip=0x45c6ba code=0x0
------------[ cut here ]------------
kernel BUG at ./include/linux/skbuff.h:1406!
invalid opcode: 0000 [#1] PREEMPT SMP KASAN NOPTI
Modules linked in:
CPU: 0 PID: 20258 Comm: syz-executor.2 Not tainted 4.14.140+ #38
task: 00000000ce63d9e7 task.stack: 0000000034521c62
RIP: 0010:skb_queue_prev include/linux/skbuff.h:1406 [inline]
RIP: 0010:tcp_write_queue_prev include/net/tcp.h:1651 [inline]
RIP: 0010:tcp_rtx_queue_tail include/net/tcp.h:1706 [inline]
RIP: 0010:tcp_fragment+0x12c6/0x13e0 net/ipv4/tcp_output.c:1284
RSP: 0000:ffff8881dba07bf8 EFLAGS: 00010206
RAX: ffff8881689c4680 RBX: ffff8881a2773480 RCX: 1ffff110344ee6d9
RDX: 0000000000000100 RSI: ffff8881a09da280 RDI: ffff8881a09da288
RBP: ffff8881a09da280 R08: 0000000001080020 R09: ffff88821ffff008
R10: ffff88821ffff017 R11: ffff88821ffff010 R12: 0000000000000000
R13: 0000000000006800 R14: 0000000001080020 R15: ffff8881a27736d0
FS:  0000000000c10940(0000) GS:ffff8881dba00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000000711934 CR3: 00000001a8c4c002 CR4: 00000000001606b0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000600
Call Trace:
 <IRQ>
 tcp_write_wakeup+0x32b/0x570 net/ipv4/tcp_output.c:3708
 tcp_send_probe0+0x46/0x3cc net/ipv4/tcp_output.c:3736
 tcp_probe_timer net/ipv4/tcp_timer.c:365 [inline]
 tcp_write_timer_handler+0x687/0x780 net/ipv4/tcp_timer.c:583
 tcp_write_timer+0xc9/0x170 net/ipv4/tcp_timer.c:597
 call_timer_fn+0x15b/0x6a0 kernel/time/timer.c:1279
 expire_timers+0x227/0x4c0 kernel/time/timer.c:1318
 __run_timers kernel/time/timer.c:1634 [inline]
 run_timer_softirq+0x1eb/0x5d0 kernel/time/timer.c:1647
 __do_softirq+0x234/0x9ec kernel/softirq.c:288
 invoke_softirq kernel/softirq.c:368 [inline]
 irq_exit+0x114/0x150 kernel/softirq.c:409
 exiting_irq arch/x86/include/asm/apic.h:648 [inline]
 smp_apic_timer_interrupt+0x1a7/0x650 arch/x86/kernel/apic/apic.c:1064
 apic_timer_interrupt+0x8c/0xa0 arch/x86/entry/entry_64.S:792
 </IRQ>
RIP: 0033:0x40e9c0
RSP: 002b:00007ffed77534c0 EFLAGS: 00000282 ORIG_RAX: ffffffffffffff10
RAX: 00000000b6e5a07a RBX: 000000003476c016 RCX: 0000001b30320000
RDX: 00000000a937807a RSI: 000000000000007a RDI: ffffffffb6e5a07a
RBP: 000000000000019a R08: 00000000b6e5a07a R09: 00000000b6e5a07e
R10: 00007ffed7753660 R11: 0000000000000246 R12: 000000000075c050
R13: 0000000080000000 R14: 00007f22ea480008 R15: 00000000000004bc
Code: ea 03 80 3c 02 00 0f 85 2c 01 00 00 4c 8b bb 58 02 00 00 ba 00 00 00 00 4c 3b 7c 24 18 4c 0f 44 fa e9 bd fc ff ff e8 aa ed da fe <0f> 0b e8 c3 b0 fd fe e9 4d ef ff ff e8 b9 b0 fd fe e9 2d f2 ff 
RIP: skb_queue_prev include/linux/skbuff.h:1406 [inline] RSP: ffff8881dba07bf8
RIP: tcp_write_queue_prev include/net/tcp.h:1651 [inline] RSP: ffff8881dba07bf8
RIP: tcp_rtx_queue_tail include/net/tcp.h:1706 [inline] RSP: ffff8881dba07bf8
RIP: tcp_fragment+0x12c6/0x13e0 net/ipv4/tcp_output.c:1284 RSP: ffff8881dba07bf8
---[ end trace 5fcc7eb3a32ce8b9 ]---
ip6_tunnel: p xmit: Local address not yet configured!