------------[ cut here ]------------
kernel BUG at ./include/linux/skbuff.h:1406!
invalid opcode: 0000 [#1] PREEMPT SMP KASAN NOPTI
Modules linked in:
CPU: 1 PID: 23859 Comm: syz-executor.3 Not tainted 4.14.141+ #0
task: 00000000a07178c0 task.stack: 000000005dc41c51
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: 0018:ffff8881dbb07bf8 EFLAGS: 00010206
RAX: ffff8881c736de00 RBX: ffff88818705e900 RCX: 1ffff11030e0bd69
RDX: 0000000000000100 RSI: ffff8881898eea00 RDI: ffff8881898eea08
RBP: ffff8881898eea00 R08: 0000000001080020 R09: ffff88821fffd048
R10: ffff88821fffd057 R11: ffff88821fffd050 R12: 0000000000000000
R13: 0000000000000600 R14: 0000000001080020 R15: ffff88818705eb50
FS:  00007f001c166700(0000) GS:ffff8881dbb00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000000000075c000 CR3: 00000000aee26005 CR4: 00000000001606a0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
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:1102
 apic_timer_interrupt+0x8c/0xa0 arch/x86/entry/entry_64.S:792
 </IRQ>
RIP: 0010:__sanitizer_cov_trace_pc+0x23/0x60 kernel/kcov.c:68
RSP: 0018:ffff888187bef690 EFLAGS: 00000246 ORIG_RAX: ffffffffffffff10
RAX: ffff8881c736de00 RBX: 80000001a339c007 RCX: 0000000000000001
RDX: 0000000000000000 RSI: 00007f001caad000 RDI: 80000001a339c007
RBP: 1ffff11030f7ded4 R08: 0000000000000001 R09: fffff94000d19cdc
R10: fffff94000d19cdb R11: ffffea00068ce6db R12: 80000001a339c007
R13: ffff8881cb387d90 R14: 00007f001caad000 R15: 0000000000000000
 __pte_needs_invert arch/x86/include/asm/pgtable-invert.h:18 [inline]
 protnone_mask arch/x86/include/asm/pgtable-invert.h:24 [inline]
 pte_pfn arch/x86/include/asm/pgtable.h:195 [inline]
 _vm_normal_page+0xb2/0x2f0 mm/memory.c:833
 zap_pte_range mm/memory.c:1315 [inline]
 zap_pmd_range mm/memory.c:1444 [inline]
 zap_pud_range mm/memory.c:1473 [inline]
 zap_p4d_range mm/memory.c:1494 [inline]
 unmap_page_range+0x7c7/0x1320 mm/memory.c:1515
 unmap_single_vma+0x118/0x170 mm/memory.c:1560
 unmap_vmas+0x43/0xa0 mm/memory.c:1590
 exit_mmap+0x213/0x440 mm/mmap.c:3072
 __mmput kernel/fork.c:940 [inline]
 mmput+0xeb/0x370 kernel/fork.c:961
 exit_mm kernel/exit.c:545 [inline]
 do_exit+0x905/0x2a20 kernel/exit.c:862
 do_group_exit+0x100/0x2e0 kernel/exit.c:978
 get_signal+0x39f/0x1cc0 kernel/signal.c:2422
 do_signal+0x96/0x15d0 arch/x86/kernel/signal.c:814
 exit_to_usermode_loop+0x11d/0x160 arch/x86/entry/common.c:160
 prepare_exit_to_usermode arch/x86/entry/common.c:199 [inline]
 syscall_return_slowpath arch/x86/entry/common.c:270 [inline]
 do_syscall_64+0x3a3/0x520 arch/x86/entry/common.c:297
 entry_SYSCALL_64_after_hwframe+0x42/0xb7
RIP: 0033:0x459879
RSP: 002b:00007f001c165c78 EFLAGS: 00000246 ORIG_RAX: 000000000000002c
RAX: ffffffffffffffe0 RBX: 0000000000000006 RCX: 0000000000459879
RDX: fffffffffffffdce RSI: 0000000020000480 RDI: 0000000000000004
RBP: 000000000075bf20 R08: 0000000000000000 R09: 0000000000000150
R10: 0000000000000000 R11: 0000000000000246 R12: 00007f001c1666d4
R13: 00000000004c783b R14: 00000000004dd0f0 R15: 00000000ffffffff
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 4a d0 da fe <0f> 0b e8 c3 98 fd fe e9 4d ef ff ff e8 b9 98 fd fe e9 2d f2 ff 
RIP: skb_queue_prev include/linux/skbuff.h:1406 [inline] RSP: ffff8881dbb07bf8
RIP: tcp_write_queue_prev include/net/tcp.h:1651 [inline] RSP: ffff8881dbb07bf8
RIP: tcp_rtx_queue_tail include/net/tcp.h:1706 [inline] RSP: ffff8881dbb07bf8
RIP: tcp_fragment+0x12c6/0x13e0 net/ipv4/tcp_output.c:1284 RSP: ffff8881dbb07bf8
---[ end trace 396810624e2aadc3 ]---