------------[ cut here ]------------ kernel BUG at net/core/skbuff.c:2208! invalid opcode: 0000 [#1] PREEMPT SMP KASAN Modules linked in: CPU: 0 PID: 9713 Comm: syz-executor.4 Not tainted 4.4.174+ #17 task: ffff88015ef00000 task.stack: ffff88015ef08000 RIP: 0010:[] [] skb_copy_and_csum_bits+0x6e7/0x800 net/core/skbuff.c:2208 RSP: 0018:ffff8801db6072b8 EFLAGS: 00010206 RAX: ffff88015ef00000 RBX: 0000000000000000 RCX: 1ffff10016443719 RDX: 0000000000000100 RSI: ffffffff821f6ac7 RDI: ffff8800b221b8c8 RBP: ffff8801db607348 R08: 0000000000000000 R09: 0000000000000000 R10: 000000000000003c R11: ffff8801d854eb5f R12: 000000005654dc3c R13: ffff8800b460fb40 R14: ffff8800b221b8c0 R15: 000000000000003c FS: 0000000000000000(0000) GS:ffff8801db600000(0063) knlGS:00000000f54edb40 CS: 0010 DS: 002b ES: 002b CR0: 0000000080050033 CR2: 00000000f54ccdb0 CR3: 00000001d19fd000 CR4: 00000000001606b0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Stack: ffff8800b460fd48 ffffffff8244588d ffffffff812582dd ffff8801d854e8e8 0000003c8271bb16 ffffffff810e1a8a ffffffff8271b24e ffffffff8271a59d ffff8800b460fd44 ffffffff8110069d 000001e85654dc3c ffff8800b460fc80 Call Trace: [] icmp_glue_bits+0x7f/0x1e0 net/ipv4/icmp.c:344 [] __ip_append_data.isra.0+0x1e91/0x2a20 net/ipv4/ip_output.c:1045 [] ip_append_data.part.0+0xec/0x160 net/ipv4/ip_output.c:1195 [] ip_append_data+0x69/0x90 net/ipv4/ip_output.c:1184 [] icmp_push_reply+0x199/0x510 net/ipv4/icmp.c:362 [] icmp_send+0xaca/0x1410 net/ipv4/icmp.c:727 [] ip_fragment net/ipv4/ip_output.c:511 [inline] [] ip_fragment.constprop.0+0x1b4/0x200 net/ipv4/ip_output.c:498 [] ip_finish_output+0x3b9/0xc60 net/ipv4/ip_output.c:286 [] NF_HOOK_COND include/linux/netfilter.h:240 [inline] [] ip_output+0x227/0x4c0 net/ipv4/ip_output.c:362 [] dst_output include/net/dst.h:498 [inline] [] ip_local_out+0x9c/0x180 net/ipv4/ip_output.c:119 [] ip_queue_xmit+0x89c/0x1ab0 net/ipv4/ip_output.c:461 [] __tcp_transmit_skb+0x1904/0x2cf0 net/ipv4/tcp_output.c:1034 [] tcp_transmit_skb net/ipv4/tcp_output.c:1047 [inline] [] __tcp_retransmit_skb+0x5ea/0x1710 net/ipv4/tcp_output.c:2665 [] tcp_retransmit_skb+0x23/0x2c0 net/ipv4/tcp_output.c:2682 [] tcp_retransmit_timer net/ipv4/tcp_timer.c:461 [inline] [] tcp_retransmit_timer+0x7ee/0x1f70 net/ipv4/tcp_timer.c:379 [] tcp_write_timer_handler+0x3bc/0x700 net/ipv4/tcp_timer.c:543 [] tcp_write_timer+0xbd/0xd0 net/ipv4/tcp_timer.c:561 [] call_timer_fn+0x18d/0x850 kernel/time/timer.c:1185 [] __run_timers kernel/time/timer.c:1261 [inline] [] run_timer_softirq+0x51f/0xb70 kernel/time/timer.c:1444 [] __do_softirq+0x226/0xa3f kernel/softirq.c:273 [] invoke_softirq kernel/softirq.c:350 [inline] [] irq_exit+0x10a/0x150 kernel/softirq.c:391 [] exiting_irq arch/x86/include/asm/apic.h:652 [inline] [] smp_apic_timer_interrupt+0x7e/0xb0 arch/x86/kernel/apic/apic.c:926 [] apic_timer_interrupt+0x9d/0xb0 arch/x86/entry/entry_64.S:768 [] __might_sleep+0x90/0x1a0 kernel/sched/core.c:7948 [] try_to_freeze_unsafe include/linux/freezer.h:56 [inline] [] try_to_freeze include/linux/freezer.h:66 [inline] [] get_signal+0x11d/0x1570 kernel/signal.c:2161 [] do_signal+0x9c/0x1840 arch/x86/kernel/signal.c:712 [] exit_to_usermode_loop+0x127/0x170 arch/x86/entry/common.c:184 [] prepare_exit_to_usermode arch/x86/entry/common.c:221 [inline] [] syscall_return_slowpath arch/x86/entry/common.c:286 [inline] [] do_syscall_32_irqs_on arch/x86/entry/common.c:336 [inline] [] do_fast_syscall_32+0x7a9/0xa90 arch/x86/entry/common.c:397 [] sysenter_flags_fixed+0xd/0x1a Code: ff ff e8 4d 2b 11 ff be 8e 08 00 00 48 c7 c7 e0 25 a5 82 e8 cc cf ed fe e9 48 fe ff ff 44 8b 7d d4 e9 c4 fd ff ff e8 29 2b 11 ff <0f> 0b 4c 89 f7 e8 8f e3 28 ff e9 b2 fa ff ff 48 89 55 b8 e8 c1 RIP [] skb_copy_and_csum_bits+0x6e7/0x800 net/core/skbuff.c:2208 RSP ---[ end trace 75c8a2d2cda8aefa ]---