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kernel BUG at ./include/linux/skbuff.h:1406!
invalid opcode: 0000 [#1] PREEMPT SMP KASAN NOPTI
Modules linked in:
CPU: 1 PID: 15715 Comm: syz-executor.4 Not tainted 4.14.139+ #34
task: 00000000975b8276 task.stack: 0000000043b26d80
RIP: 0010:skb_queue_prev include/linux/skbuff.h:1406 [inline]
RIP: 0010:tcp_write_queue_prev include/net/tcp.h:1654 [inline]
RIP: 0010:tcp_rtx_queue_tail include/net/tcp.h:1709 [inline]
RIP: 0010:tcp_fragment+0x12c6/0x13e0 net/ipv4/tcp_output.c:1284
RSP: 0018:ffff8881dbb07bf8 EFLAGS: 00010206
RAX: ffff8881c2d1c680 RBX: ffff8881d2e93f00 RCX: 1ffff1103a5d2829
RDX: 0000000000000100 RSI: ffff8881d1f06000 RDI: ffff8881d1f06008
RBP: ffff8881d1f06000 R08: 0000000001080020 R09: ffff88821ffff048
R10: ffff88821ffff057 R11: ffff88821ffff050 R12: 0000000000000000
R13: 0000000000001880 R14: 0000000001080020 R15: ffff8881d2e94150
FS:  0000000000b12940(0000) GS:ffff8881dbb00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000000000046ee40 CR3: 00000001a3236002 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:1064
 apic_timer_interrupt+0x8c/0xa0 arch/x86/entry/entry_64.S:792
 </IRQ>
RIP: 0010:arch_local_irq_restore arch/x86/include/asm/paravirt.h:779 [inline]
RIP: 0010:seqcount_lockdep_reader_access include/linux/seqlock.h:83 [inline]
RIP: 0010:read_seqcount_begin include/linux/seqlock.h:164 [inline]
RIP: 0010:read_seqbegin include/linux/seqlock.h:434 [inline]
RIP: 0010:path_init+0x569/0x14b0 fs/namei.c:2230
RSP: 0018:ffff8881a4aa7b00 EFLAGS: 00000246 ORIG_RAX: ffffffffffffff10
RAX: 0000000000000007 RBX: 0000000000000246 RCX: 0000000000000000
RDX: 0000000000000000 RSI: 0000000000000001 RDI: 0000000000000246
RBP: ffff8881a4aa7b98 R08: ffffffffa819c072 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000000 R12: ffff8881a4aa7c10
R13: ffff8881a4aa7c10 R14: 0000000000000040 R15: ffff8881a231d51c
 path_parentat.isra.0+0x22/0x150 fs/namei.c:2408
 filename_parentat.isra.0+0x18d/0x3e0 fs/namei.c:2434
 filename_create+0xa0/0x430 fs/namei.c:3685
 user_path_create fs/namei.c:3760 [inline]
 SYSC_symlinkat fs/namei.c:4234 [inline]
 SyS_symlinkat+0xc5/0x1e0 fs/namei.c:4221
 do_syscall_64+0x19b/0x520 arch/x86/entry/common.c:292
 entry_SYSCALL_64_after_hwframe+0x42/0xb7
RIP: 0033:0x459557
RSP: 002b:00007ffc5dd322b8 EFLAGS: 00000206 ORIG_RAX: 0000000000000058
RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 0000000000459557
RDX: 00007ffc5dd32353 RSI: 00000000004bf0a6 RDI: 00007ffc5dd32340
RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000013
R10: 0000000000000075 R11: 0000000000000206 R12: 0000000000000001
R13: 00007ffc5dd322f0 R14: 0000000000000000 R15: 00007ffc5dd32300
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 7a f7 da fe <0f> 0b e8 93 ba fd fe e9 4d ef ff ff e8 89 ba 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:1654 [inline] RSP: ffff8881dbb07bf8
RIP: tcp_rtx_queue_tail include/net/tcp.h:1709 [inline] RSP: ffff8881dbb07bf8
RIP: tcp_fragment+0x12c6/0x13e0 net/ipv4/tcp_output.c:1284 RSP: ffff8881dbb07bf8
---[ end trace 3acf6c52555686d4 ]---