------------[ cut here ]------------
WARNING: CPU: 1 PID: 3882 at net/ipv4/tcp_input.c:1991 tcp_enter_loss+0xe18/0x1100 net/ipv4/tcp_input.c:1991
Kernel panic - not syncing: panic_on_warn set ...

CPU: 1 PID: 3882 Comm: syz-executor7 Not tainted 4.9.82-g7595d55 #39
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
 ffff8801db307a88 ffffffff81d94fc9 ffffffff83a48080 ffff8801db307b60
 ffffffff83f29600 ffffffff83257e28 0000000000000009 ffff8801db307b50
 ffffffff8142f6c1 0000000041b58ab3 ffffffff8418b1f0 ffffffff8142f505
Call Trace:
 <IRQ> [  193.801993]  [<ffffffff81d94fc9>] __dump_stack lib/dump_stack.c:15 [inline]
 <IRQ> [  193.801993]  [<ffffffff81d94fc9>] dump_stack+0xc1/0x128 lib/dump_stack.c:51
 [<ffffffff8142f6c1>] panic+0x1bc/0x3a8 kernel/panic.c:179
 [<ffffffff811311c4>] __warn+0x1c4/0x1e0 kernel/panic.c:542
 [<ffffffff8113142c>] warn_slowpath_null+0x2c/0x40 kernel/panic.c:585
 [<ffffffff83257e28>] tcp_enter_loss+0xe18/0x1100 net/ipv4/tcp_input.c:1991
 [<ffffffff83281b07>] tcp_retransmit_timer+0xc07/0x22c0 net/ipv4/tcp_timer.c:505
 [<ffffffff832833de>] tcp_write_timer_handler+0x21e/0x780 net/ipv4/tcp_timer.c:591
 [<ffffffff83283a9a>] tcp_write_timer+0x15a/0x170 net/ipv4/tcp_timer.c:609
 [<ffffffff812a5904>] call_timer_fn+0x164/0x700 kernel/time/timer.c:1319
 [<ffffffff812a7b8c>] expire_timers kernel/time/timer.c:1359 [inline]
 [<ffffffff812a7b8c>] __run_timers kernel/time/timer.c:1658 [inline]
 [<ffffffff812a7b8c>] run_timer_softirq+0xe8c/0x1650 kernel/time/timer.c:1684
 [<ffffffff838bb906>] __do_softirq+0x206/0x951 kernel/softirq.c:284
 [<ffffffff81146c45>] invoke_softirq kernel/softirq.c:364 [inline]
 [<ffffffff81146c45>] irq_exit+0x165/0x190 kernel/softirq.c:405
 [<ffffffff838ba51b>] exiting_irq arch/x86/include/asm/apic.h:659 [inline]
 [<ffffffff838ba51b>] smp_apic_timer_interrupt+0x7b/0xa0 arch/x86/kernel/apic/apic.c:960
 [<ffffffff838b67a0>] apic_timer_interrupt+0xa0/0xb0 arch/x86/entry/entry_64.S:636
 <EOI> [  193.980669]  [<ffffffff81dd1eaa>] ? flex_array_get_ptr+0x2a/0x60 lib/flex_array.c:353
 [<ffffffff81c0d1a5>] avtab_search_node+0x1d5/0x490 security/selinux/ss/avtab.c:229
 [<ffffffff81c26fda>] context_struct_compute_av+0x51a/0x10b0 security/selinux/ss/services.c:667
 [<ffffffff81c29bc2>] security_compute_av+0x2f2/0x7d0 security/selinux/ss/services.c:1117
 [<ffffffff81bd9cbb>] avc_compute_av+0xcb/0x640 security/selinux/avc.c:976
 [<ffffffff81bdbe98>] avc_has_perm_noaudit security/selinux/avc.c:1114 [inline]
 [<ffffffff81bdbe98>] avc_has_perm+0x378/0x4f0 security/selinux/avc.c:1148
 [<ffffffff81beef00>] task_has_perm+0x200/0x340 security/selinux/hooks.c:1631
 [<ffffffff81bef063>] selinux_task_wait+0x23/0x30 security/selinux/hooks.c:3966
 [<ffffffff81bd4e9d>] security_task_wait+0x6d/0xa0 security/security.c:1032
 [<ffffffff8113e781>] wait_consider_task+0x221/0x36a0 kernel/exit.c:1377
 [<ffffffff81142023>] do_wait_thread kernel/exit.c:1490 [inline]
 [<ffffffff81142023>] do_wait+0x423/0x950 kernel/exit.c:1561
 [<ffffffff8114305e>] SYSC_wait4 kernel/exit.c:1689 [inline]
 [<ffffffff8114305e>] SyS_wait4+0x10e/0x1d0 kernel/exit.c:1658
 [<ffffffff81006505>] do_syscall_64+0x1a5/0x490 arch/x86/entry/common.c:282
 [<ffffffff838b4e7d>] entry_SYSCALL_64_after_swapgs+0x47/0xc5
Shutting down cpus with NMI
Dumping ftrace buffer:
   (ftrace buffer empty)
Kernel Offset: disabled
Rebooting in 86400 seconds..