audit: type=1400 audit(1569322514.918:39): avc:  denied  { relabelto } for  pid=27106 comm="syz-executor.3" name="PACKET" dev="sockfs" ino=118256 scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=system_u:object_r:pam_var_run_t:s0 tclass=packet_socket permissive=1
------------[ cut here ]------------
kernel BUG at net/core/skbuff.c:2208!
invalid opcode: 0000 [#1] PREEMPT SMP KASAN
Modules linked in:
CPU: 1 PID: 27122 Comm: syz-executor.1 Not tainted 4.4.174+ #17
task: ffff8801d1742f80 task.stack: ffff8801beca8000
RIP: 0010:[<ffffffff821f6ac7>]  [<ffffffff821f6ac7>] skb_copy_and_csum_bits+0x6e7/0x800 net/core/skbuff.c:2208
RSP: 0018:ffff8801db7072b8  EFLAGS: 00010206
RAX: ffff8801d1742f80 RBX: 0000000000000000 RCX: 1ffff1003b342df9
RDX: 0000000000000100 RSI: ffffffff821f6ac7 RDI: ffff8801d9a16fc8
RBP: ffff8801db707348 R08: 0000000000000000 R09: 0000000000000000
R10: 000000000000003c R11: ffff8801d9a4345f R12: 000000003f742728
R13: ffff8800a51b2500 R14: ffff8801d9a16fc0 R15: 000000000000003c
FS:  0000000000000000(0000) GS:ffff8801db700000(0000) knlGS:0000000000000000
CS:  0010 DS: 002b ES: 002b CR0: 0000000080050033
CR2: 000000002fc21000 CR3: 00000000a7202000 CR4: 00000000001606b0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Stack:
 ffff8800a51b2848 ffffffff8244588d ffffffff812582dd ffff8801d9a431e8
 0000003c8271bb16 ffffffff810e1a8a ffffffff8271b24e ffffffff8271a59d
 ffff8800a51b2844 ffffffff81432e26 000001e83f742728 ffff8800a51b2780
Call Trace:
 <IRQ> 
 [<ffffffff82493d6f>] icmp_glue_bits+0x7f/0x1e0 net/ipv4/icmp.c:344
 [<ffffffff823caf41>] __ip_append_data.isra.0+0x1e91/0x2a20 net/ipv4/ip_output.c:1045
 [<ffffffff823cbbbc>] ip_append_data.part.0+0xec/0x160 net/ipv4/ip_output.c:1195
 [<ffffffff823d07a9>] ip_append_data+0x69/0x90 net/ipv4/ip_output.c:1184
 [<ffffffff82493979>] icmp_push_reply+0x199/0x510 net/ipv4/icmp.c:362
 [<ffffffff824950fa>] icmp_send+0xaca/0x1410 net/ipv4/icmp.c:727
 [<ffffffff823cbde4>] ip_fragment net/ipv4/ip_output.c:511 [inline]
 [<ffffffff823cbde4>] ip_fragment.constprop.0+0x1b4/0x200 net/ipv4/ip_output.c:498
 [<ffffffff823cc1e9>] ip_finish_output+0x3b9/0xc60 net/ipv4/ip_output.c:286
 [<ffffffff823d04a7>] NF_HOOK_COND include/linux/netfilter.h:240 [inline]
 [<ffffffff823d04a7>] ip_output+0x227/0x4c0 net/ipv4/ip_output.c:362
 [<ffffffff823cd21c>] dst_output include/net/dst.h:498 [inline]
 [<ffffffff823cd21c>] ip_local_out+0x9c/0x180 net/ipv4/ip_output.c:119
 [<ffffffff823ce58c>] ip_queue_xmit+0x89c/0x1ab0 net/ipv4/ip_output.c:461
 [<ffffffff82431dd4>] __tcp_transmit_skb+0x1904/0x2cf0 net/ipv4/tcp_output.c:1034
 [<ffffffff8243c54a>] tcp_transmit_skb net/ipv4/tcp_output.c:1047 [inline]
 [<ffffffff8243c54a>] __tcp_retransmit_skb+0x5ea/0x1710 net/ipv4/tcp_output.c:2665
 [<ffffffff8243de33>] tcp_retransmit_skb+0x23/0x2c0 net/ipv4/tcp_output.c:2682
 [<ffffffff8244394e>] tcp_retransmit_timer net/ipv4/tcp_timer.c:461 [inline]
 [<ffffffff8244394e>] tcp_retransmit_timer+0x7ee/0x1f70 net/ipv4/tcp_timer.c:379
 [<ffffffff8244548c>] tcp_write_timer_handler+0x3bc/0x700 net/ipv4/tcp_timer.c:543
 [<ffffffff8244588d>] tcp_write_timer+0xbd/0xd0 net/ipv4/tcp_timer.c:561
 [<ffffffff812582dd>] call_timer_fn+0x18d/0x850 kernel/time/timer.c:1185
 [<ffffffff81258ebf>] __run_timers kernel/time/timer.c:1261 [inline]
 [<ffffffff81258ebf>] run_timer_softirq+0x51f/0xb70 kernel/time/timer.c:1444
 [<ffffffff8271bb16>] __do_softirq+0x226/0xa3f kernel/softirq.c:273
 [<ffffffff810e1a8a>] invoke_softirq kernel/softirq.c:350 [inline]
 [<ffffffff810e1a8a>] irq_exit+0x10a/0x150 kernel/softirq.c:391
 [<ffffffff8271b24e>] exiting_irq arch/x86/include/asm/apic.h:652 [inline]
 [<ffffffff8271b24e>] smp_apic_timer_interrupt+0x7e/0xb0 arch/x86/kernel/apic/apic.c:926
 [<ffffffff8271a59d>] apic_timer_interrupt+0x9d/0xb0 arch/x86/entry/entry_64.S:768
 <EOI> 
 [<ffffffff814546f6>] atomic_add_negative arch/x86/include/asm/atomic.h:144 [inline]
 [<ffffffff814546f6>] page_remove_file_rmap mm/rmap.c:1249 [inline]
 [<ffffffff814546f6>] page_remove_rmap+0xd6/0x140 mm/rmap.c:1279
 [<ffffffff81432e26>] zap_pte_range mm/memory.c:1160 [inline]
 [<ffffffff81432e26>] zap_pmd_range mm/memory.c:1253 [inline]
 [<ffffffff81432e26>] zap_pud_range mm/memory.c:1274 [inline]
 [<ffffffff81432e26>] unmap_page_range mm/memory.c:1298 [inline]
 [<ffffffff81432e26>] unmap_single_vma+0xaf6/0x1090 mm/memory.c:1343
 [<ffffffff81434d28>] unmap_vmas+0x48/0xa0 mm/memory.c:1373
 [<ffffffff8144bdc5>] exit_mmap+0x1d5/0x3a0 mm/mmap.c:2961
 [<ffffffff810ca38e>] __mmput kernel/fork.c:717 [inline]
 [<ffffffff810ca38e>] mmput kernel/fork.c:737 [inline]
 [<ffffffff810ca38e>] mmput+0xde/0x360 kernel/fork.c:732
 [<ffffffff810d8a2e>] exit_mm kernel/exit.c:440 [inline]
 [<ffffffff810d8a2e>] do_exit+0x7ee/0x2c60 kernel/exit.c:750
 [<ffffffff810df091>] do_group_exit+0x111/0x300 kernel/exit.c:893
 [<ffffffff81100a97>] get_signal+0x517/0x1570 kernel/signal.c:2321
 [<ffffffff8100bd4c>] do_signal+0x9c/0x1840 arch/x86/kernel/signal.c:712
 [<ffffffff81003da7>] exit_to_usermode_loop+0x127/0x170 arch/x86/entry/common.c:184
 [<ffffffff810064b9>] prepare_exit_to_usermode arch/x86/entry/common.c:221 [inline]
 [<ffffffff810064b9>] syscall_return_slowpath arch/x86/entry/common.c:286 [inline]
 [<ffffffff810064b9>] do_syscall_32_irqs_on arch/x86/entry/common.c:336 [inline]
 [<ffffffff810064b9>] do_fast_syscall_32+0x7a9/0xa90 arch/x86/entry/common.c:397
 [<ffffffff8271a350>] 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  [<ffffffff821f6ac7>] skb_copy_and_csum_bits+0x6e7/0x800 net/core/skbuff.c:2208
 RSP <ffff8801db7072b8>
---[ end trace 7c9c5b7f2e244436 ]---