[ 2884]     0  2884    18277     8750      26       4        0          1000 syz-executor.4
[ 3090]     0  3090    18211     8747      26       4        0          1000 syz-executor.5
[ 3223]     0  3223    18145     8742      26       4        0          1000 syz-executor.4
------------[ cut here ]------------
[ 3261]     0  3261    18244     8748      26       5        0          1000 syz-executor.3
WARNING: CPU: 1 PID: 0 at net/ipv4/tcp_timer.c:429 tcp_retransmit_timer+0x1a66/0x2590 net/ipv4/tcp_timer.c:429
[ 3308]     0  3308    18211     8750      29       4        0          1000 syz-executor.2
Kernel panic - not syncing: panic_on_warn set ...

CPU: 1 PID: 0 Comm: swapper/1 Not tainted 4.14.144+ #0
Call Trace:
 <IRQ>
 __dump_stack lib/dump_stack.c:17 [inline]
 dump_stack+0xca/0x134 lib/dump_stack.c:53
 panic+0x1ea/0x3d3 kernel/panic.c:182
[ 3320]     0  3320    18211     8750      29       4        0          1000 syz-executor.2
[ 3345]     0  3345    18145     8743      26       4        0          1000 syz-executor.5
 __warn.cold+0x2f/0x3a kernel/panic.c:546
 report_bug+0x20a/0x248 lib/bug.c:186
 fixup_bug arch/x86/kernel/traps.c:177 [inline]
 fixup_bug arch/x86/kernel/traps.c:172 [inline]
 do_error_trap+0x1bf/0x2d0 arch/x86/kernel/traps.c:295
[ 3441]     0  3441    18145     8742      26       4        0          1000 syz-executor.5
[ 3459]     0  3459    18145     8743      26       4        0          1000 syz-executor.5
 invalid_op+0x18/0x40 arch/x86/entry/entry_64.S:963
RIP: 0010:tcp_retransmit_timer+0x1a66/0x2590 net/ipv4/tcp_timer.c:429
RSP: 0018:ffff8881dbb07c78 EFLAGS: 00010206
[ 3486]     0  3486    18145     8742      26       4        0          1000 syz-executor.4
[ 3522]     0  3522    18145     8743      26       5        0          1000 syz-executor.3
RAX: ffff8881daa72f00 RBX: ffff88819e6b8000 RCX: 0000000000000001
RDX: 0000000000000100 RSI: 0000000000000000 RDI: ffff8881d345c0c8
RBP: ffff8881d345b700 R08: ffff88821ffff05c R09: ffff88821ffff048
R10: ffff88821ffff057 R11: ffff88821ffff050 R12: ffff8881d345bd9a
R13: ffff8881d345b730 R14: 0000000000000000 R15: ffff8881d345bf0c
[ 3525]     0  3525    18145     8744      26       4        0          1000 syz-executor.2
 tcp_write_timer_handler+0x43d/0x780 net/ipv4/tcp_timer.c:579
[ 3550]     0  3550    18145     8743      26       5        0          1000 syz-executor.3
 tcp_write_timer+0xc9/0x170 net/ipv4/tcp_timer.c:597
 call_timer_fn+0x15b/0x6a0 kernel/time/timer.c:1279
[ 3556]     0  3556    18145     8743      26       5        0          1000 syz-executor.3
[ 3571]     0  3571    18145     8743      26       5        0          1000 syz-executor.3
 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
[ 3595]     0  3595    18145     8743      26       5        0          1000 syz-executor.3
 __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:1102
[ 3623]     0  3623    18145     8744      26       4        0          1000 syz-executor.2
 apic_timer_interrupt+0x8c/0xa0 arch/x86/entry/entry_64.S:792
[ 3627]     0  3627    18145     8743      26       4        0          1000 syz-executor.0
 </IRQ>
RIP: 0010:native_safe_halt+0x13/0x20 arch/x86/include/asm/irqflags.h:61
RSP: 0018:ffff8881daa8fd60 EFLAGS: 00000246 ORIG_RAX: ffffffffffffff10
RAX: 0000000000000000 RBX: ffffffff95a2eba8 RCX: 0000000000000000
RDX: 0000000000000000 RSI: 0000000000000001 RDI: ffff8881daa7372c
RBP: 0000000000000001 R08: 0000000000000001 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000
R13: 0000000000000000 R14: ffff8881daa72f00 R15: dffffc0000000000
[ 3702]     0  3702    18178     8745      26       4        0          1000 syz-executor.0
 arch_safe_halt arch/x86/include/asm/paravirt.h:94 [inline]
 default_idle+0x61/0x3b0 arch/x86/kernel/process.c:566
 cpuidle_idle_call kernel/sched/idle.c:159 [inline]
 do_idle+0x2e6/0x390 kernel/sched/idle.c:268
[ 3709]     0  3709    18145     8743      26       5        0          1000 syz-executor.3
[ 3725]     0  3725    18145     8743      26       5        0          1000 syz-executor.3
 cpu_startup_entry+0xc6/0xd0 kernel/sched/idle.c:374
 start_secondary+0x3a8/0x4b0 arch/x86/kernel/smpboot.c:272
[ 3769]     0  3769    18113       15      23       3        0             0 syz-executor.1
[ 3770]     0  3770    18112     8834      24       4        0             0 syz-executor.1
 secondary_startup_64+0xa5/0xb0 arch/x86/kernel/head_64.S:240
Kernel Offset: 0x12200000 from 0xffffffff81000000 (relocation range: 0xffffffff80000000-0xffffffffbfffffff)
Rebooting in 86400 seconds..