audit: type=1400 audit(1566564748.189:5): avc:  denied  { associate } for  pid=2057 comm="syz-executor.0" name="syz0" scontext=unconfined_u:object_r:unlabeled_t:s0 tcontext=system_u:object_r:unlabeled_t:s0 tclass=filesystem permissive=1
------------[ cut here ]------------
kernel BUG at ./include/linux/skbuff.h:1294!
invalid opcode: 0000 [#1] PREEMPT SMP KASAN
Modules linked in:
CPU: 1 PID: 0 Comm: swapper/1 Not tainted 4.9.189+ #3
task: 00000000baedce43 task.stack: 0000000065981f14
RIP: 0010:[<ffffffff8252ae16>]  [<000000002b3f1cf0>] skb_queue_prev include/linux/skbuff.h:1294 [inline]
RIP: 0010:[<ffffffff8252ae16>]  [<000000002b3f1cf0>] tcp_write_queue_prev include/net/tcp.h:1563 [inline]
RIP: 0010:[<ffffffff8252ae16>]  [<000000002b3f1cf0>] tcp_rtx_queue_tail include/net/tcp.h:1616 [inline]
RIP: 0010:[<ffffffff8252ae16>]  [<000000002b3f1cf0>] tcp_fragment+0x1266/0x1390 net/ipv4/tcp_output.c:1195
RSP: 0018:ffff8801db707b90  EFLAGS: 00010206
RAX: ffff8801da6b2f80 RBX: ffff8801d0c50a80 RCX: 1ffff1003a18a1cd
RDX: 0000000000000100 RSI: ffffffff8252ae16 RDI: ffff8801cc5c2a08
RBP: ffff8801db707be0 R08: 0000000002080020 R09: ffff8801cc5c2a28
R10: ffff88021fffd050 R11: 0000000620dc5bb8 R12: 0000000000000000
R13: ffff8801d0c50c70 R14: ffff8801cc5c2a00 R15: ffff8801d0c50cc4
FS:  0000000000000000(0000) GS:ffff8801db700000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000000000075c000 CR3: 00000001ce923000 CR4: 00000000001606b0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Stack:
 ffff8801cc5c2a00 ffff8801d0c50c70 ffff8801cc5c2a78 ffff880102080020
 000068000000ffcb 0000000000006800 ffff8801d0c50a80 ffff8801cc5c2a00
 000000000000ffcb ffff8801cc5c2a34 ffff8801db707c30 ffffffff8253e775
Call Trace:
 <IRQ> [   24.859369]  [<00000000f7cb0f97>] tcp_write_wakeup+0x345/0x5b0 net/ipv4/tcp_output.c:3613
 [<00000000b569a837>] tcp_send_probe0+0x4b/0x400 net/ipv4/tcp_output.c:3641
 [<0000000002510916>] tcp_probe_timer net/ipv4/tcp_timer.c:379 [inline]
 [<0000000002510916>] tcp_write_timer_handler+0x6a0/0x7a0 net/ipv4/tcp_timer.c:596
 [<0000000093600ef3>] tcp_write_timer+0xc5/0x190 net/ipv4/tcp_timer.c:610
 [<0000000037dfc2f0>] call_timer_fn+0x167/0x6d0 kernel/time/timer.c:1319
 [<0000000033226f6f>] expire_timers+0x25b/0x5c0 kernel/time/timer.c:1359
 [<000000001a01afe1>] __run_timers kernel/time/timer.c:1674 [inline]
 [<000000001a01afe1>] run_timer_softirq+0x1ff/0x620 kernel/time/timer.c:1687
 [<00000000cf43f1c9>] __do_softirq+0x22d/0x964 kernel/softirq.c:288
 [<000000003b06628c>] invoke_softirq kernel/softirq.c:368 [inline]
 [<000000003b06628c>] irq_exit+0x119/0x160 kernel/softirq.c:409
 [<0000000040152d73>] exiting_irq arch/x86/include/asm/apic.h:669 [inline]
 [<0000000040152d73>] smp_apic_timer_interrupt+0x7e/0xb0 arch/x86/kernel/apic/apic.c:962
 [<000000006c75ab19>] apic_timer_interrupt+0xa5/0xb0 arch/x86/entry/entry_64.S:653
 <EOI> [   25.010655]  [<00000000ca686bf3>] ? native_safe_halt+0x41/0x60 arch/x86/include/asm/irqflags.h:59
 [<00000000782eeaa4>] arch_safe_halt arch/x86/include/asm/paravirt.h:104 [inline]
 [<00000000782eeaa4>] default_idle+0x56/0x370 arch/x86/kernel/process.c:500
 [<00000000a8a19819>] arch_cpu_idle+0x10/0x20 arch/x86/kernel/process.c:491
 [<00000000074ec79f>] default_idle_call+0x36/0x60 kernel/sched/idle.c:97
 [<000000005aa6b44b>] cpuidle_idle_call kernel/sched/idle.c:155 [inline]
 [<000000005aa6b44b>] cpu_idle_loop kernel/sched/idle.c:248 [inline]
 [<000000005aa6b44b>] cpu_startup_entry+0x283/0x3a0 kernel/sched/idle.c:303
 [<00000000b1fcdb09>] start_secondary+0x31c/0x410 arch/x86/kernel/smpboot.c:251
Code: c1 ea 03 80 3c 02 00 0f 85 3a 01 00 00 4c 8b ab f8 01 00 00 ba 00 00 00 00 4c 3b 6d b8 4c 0f 44 ea e9 f9 fc ff ff e8 5a 75 df fe <0f> 0b e8 93 36 fd fe e9 6e f0 ff ff e8 89 36 fd fe e9 68 f3 ff 
RIP  [<000000002b3f1cf0>] skb_queue_prev include/linux/skbuff.h:1294 [inline]
RIP  [<000000002b3f1cf0>] tcp_write_queue_prev include/net/tcp.h:1563 [inline]
RIP  [<000000002b3f1cf0>] tcp_rtx_queue_tail include/net/tcp.h:1616 [inline]
RIP  [<000000002b3f1cf0>] tcp_fragment+0x1266/0x1390 net/ipv4/tcp_output.c:1195
 RSP <ffff8801db707b90>
---[ end trace ec5794efee9e45e7 ]---