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audit: type=1400 audit(1516799532.590:73): avc:  denied  { create } for  pid=11210 comm="syz-executor6" scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tclass=netlink_generic_socket permissive=1
kernel BUG at net/ipv4/tcp_output.c:2668!
invalid opcode: 0000 [#1] PREEMPT SMP KASAN
Dumping ftrace buffer:
   (ftrace buffer empty)
Modules linked in:
CPU: 1 PID: 11216 Comm: syz-executor4 Not tainted 4.9.78-ge9dabe6 #28
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
task: ffff8801c85fe000 task.stack: ffff8801c0248000
RIP: 0010:[<ffffffff83278c02>]  [<ffffffff83278c02>] __tcp_retransmit_skb+0x1882/0x1ce0 net/ipv4/tcp_output.c:2668
RSP: 0000:ffff8801db307b58  EFLAGS: 00010206
RAX: ffff8801c85fe000 RBX: 0000000000000001 RCX: ffffffff83278c02
RDX: 0000000000000100 RSI: ffff8801ca254d84 RDI: ffff8801cd6da2ac
RBP: ffff8801db307c10 R08: ffff88021fffd05c R09: 0000000000000000
R10: ffff88021fffd058 R11: ffff88021fffd050 R12: ffff8801cd6da306
R13: 000000004d96ec9e R14: ffff8801cd6da280 R15: ffff8801ca254b40
FS:  0000000000000000(0000) GS:ffff8801db300000(0063) knlGS:000000000924d900
CS:  0010 DS: 002b ES: 002b CR0: 0000000080050033
CR2: 000000000813800c CR3: 00000001cd548000 CR4: 0000000000160670
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Stack:
 150cc116b19647a4 0000000ca2c0705c ffff8801ca254b40 0000000000000004
 0000000000000000 dffffc0000000000 ffff8801cc46aa30 ffff8801db307bb8
 ffffffff8339e0c7 ffff8801ca2553f4 ffff8801ca254b40 ffffffff8339dca0
Call Trace:
 [<ffffffff83279889>] tcp_retransmit_skb+0x29/0x2b0 net/ipv4/tcp_output.c:2741
 [<ffffffff8328029f>] tcp_retransmit_timer+0xc4f/0x22c0 net/ipv4/tcp_timer.c:492
 [<ffffffff83281b2e>] tcp_write_timer_handler+0x21e/0x780 net/ipv4/tcp_timer.c:576
 [<ffffffff832821ea>] tcp_write_timer+0x15a/0x170 net/ipv4/tcp_timer.c:594
 [<ffffffff812a56f4>] call_timer_fn+0x164/0x700 kernel/time/timer.c:1319
 [<ffffffff812a797c>] expire_timers kernel/time/timer.c:1359 [inline]
 [<ffffffff812a797c>] __run_timers kernel/time/timer.c:1658 [inline]
 [<ffffffff812a797c>] run_timer_softirq+0xe8c/0x1650 kernel/time/timer.c:1684
 [<ffffffff838b98c6>] __do_softirq+0x206/0x951 kernel/softirq.c:284
 [<ffffffff81146be5>] invoke_softirq kernel/softirq.c:364 [inline]
 [<ffffffff81146be5>] irq_exit+0x165/0x190 kernel/softirq.c:405
 [<ffffffff838b84db>] exiting_irq arch/x86/include/asm/apic.h:659 [inline]
 [<ffffffff838b84db>] smp_apic_timer_interrupt+0x7b/0xa0 arch/x86/kernel/apic/apic.c:960
 [<ffffffff838b4760>] apic_timer_interrupt+0xa0/0xb0 arch/x86/entry/entry_64.S:752
 <EOI> [   56.548237] Code: 
RIP  [<ffffffff83278c02>] __tcp_retransmit_skb+0x1882/0x1ce0 net/ipv4/tcp_output.c:2668
 RSP <ffff8801db307b58>
---[ end trace 1c868c8c47fb5189 ]---
Kernel panic - not syncing: Fatal exception in interrupt
Dumping ftrace buffer:
   (ftrace buffer empty)
Kernel Offset: disabled
Rebooting in 86400 seconds..