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kernel BUG at net/core/skbuff.c:2193!
invalid opcode: 0000 [#1] PREEMPT SMP KASAN
Modules linked in:
CPU: 1 PID: 14718 Comm: syz-executor0 Not tainted 4.4.171+ #11
task: ffff8800a13a17c0 task.stack: ffff8801cf248000
RIP: 0010:[<ffffffff821f5eb7>]  [<ffffffff821f5eb7>] skb_copy_and_csum_bits+0x6e7/0x800 net/core/skbuff.c:2193
RSP: 0018:ffff8801db7072b8  EFLAGS: 00010206
RAX: ffff8800a13a17c0 RBX: 0000000000000000 RCX: 1ffff10017432df9
RDX: 0000000000000100 RSI: ffffffff821f5eb7 RDI: ffff8800ba196fc8
RBP: ffff8801db707348 R08: 0000000000000000 R09: 0000000000000000
R10: 000000000000003c R11: ffff8800ba6fc75f R12: 00000000e4a8542a
R13: ffff880134cc88c0 R14: ffff8800ba196fc0 R15: 000000000000003c
FS:  00007f3c726ea700(0000) GS:ffff8801db700000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007eff271a6000 CR3: 000000009a223000 CR4: 00000000001606b0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Stack:
 ffff880134cc8ac8 ffffffff824452ad ffffffff812580cd ffff8800ba6fc4e8
 0000003c8271ab96 ffffffff810e187a ffffffff8271a2ce ffffffff8271961d
 ffff880134cc8ac4 ffffffff821e6582 000001e8e4a8542a ffff880134cc8a00
Call Trace:
 <IRQ> 
 [<ffffffff824939bf>] icmp_glue_bits+0x7f/0x1e0 net/ipv4/icmp.c:344
 [<ffffffff823ca8c1>] __ip_append_data.isra.0+0x1e91/0x2a20 net/ipv4/ip_output.c:1045
 [<ffffffff823cb53c>] ip_append_data.part.0+0xec/0x160 net/ipv4/ip_output.c:1195
 [<ffffffff823d0129>] ip_append_data+0x69/0x90 net/ipv4/ip_output.c:1184
 [<ffffffff824935c9>] icmp_push_reply+0x199/0x510 net/ipv4/icmp.c:362
 [<ffffffff82494d4a>] icmp_send+0xaca/0x1410 net/ipv4/icmp.c:727
 [<ffffffff823cb764>] ip_fragment net/ipv4/ip_output.c:511 [inline]
 [<ffffffff823cb764>] ip_fragment.constprop.0+0x1b4/0x200 net/ipv4/ip_output.c:498
 [<ffffffff823cbb69>] ip_finish_output+0x3b9/0xc60 net/ipv4/ip_output.c:286
 [<ffffffff823cfe27>] NF_HOOK_COND include/linux/netfilter.h:240 [inline]
 [<ffffffff823cfe27>] ip_output+0x227/0x4c0 net/ipv4/ip_output.c:362
 [<ffffffff823ccb9c>] dst_output include/net/dst.h:498 [inline]
 [<ffffffff823ccb9c>] ip_local_out+0x9c/0x180 net/ipv4/ip_output.c:119
 [<ffffffff823cdf0c>] ip_queue_xmit+0x89c/0x1ab0 net/ipv4/ip_output.c:461
 [<ffffffff824317f4>] __tcp_transmit_skb+0x1904/0x2cf0 net/ipv4/tcp_output.c:1034
 [<ffffffff8243bf6a>] tcp_transmit_skb net/ipv4/tcp_output.c:1047 [inline]
 [<ffffffff8243bf6a>] __tcp_retransmit_skb+0x5ea/0x1710 net/ipv4/tcp_output.c:2665
 [<ffffffff8243d853>] tcp_retransmit_skb+0x23/0x2c0 net/ipv4/tcp_output.c:2682
 [<ffffffff8244336e>] tcp_retransmit_timer net/ipv4/tcp_timer.c:461 [inline]
 [<ffffffff8244336e>] tcp_retransmit_timer+0x7ee/0x1f70 net/ipv4/tcp_timer.c:379
 [<ffffffff82444eac>] tcp_write_timer_handler+0x3bc/0x700 net/ipv4/tcp_timer.c:543
 [<ffffffff824452ad>] tcp_write_timer+0xbd/0xd0 net/ipv4/tcp_timer.c:561
 [<ffffffff812580cd>] call_timer_fn+0x18d/0x850 kernel/time/timer.c:1185
 [<ffffffff81258caf>] __run_timers kernel/time/timer.c:1261 [inline]
 [<ffffffff81258caf>] run_timer_softirq+0x51f/0xb70 kernel/time/timer.c:1444
 [<ffffffff8271ab96>] __do_softirq+0x226/0xa3f kernel/softirq.c:273
 [<ffffffff810e187a>] invoke_softirq kernel/softirq.c:350 [inline]
 [<ffffffff810e187a>] irq_exit+0x10a/0x150 kernel/softirq.c:391
 [<ffffffff8271a2ce>] exiting_irq arch/x86/include/asm/apic.h:652 [inline]
 [<ffffffff8271a2ce>] smp_apic_timer_interrupt+0x7e/0xb0 arch/x86/kernel/apic/apic.c:926
 [<ffffffff8271961d>] apic_timer_interrupt+0x9d/0xb0 arch/x86/entry/entry_64.S:768
 <EOI> 
 [<ffffffff8125bb86>] spin_unlock_irqrestore include/linux/spinlock.h:362 [inline]
 [<ffffffff8125bb86>] __mod_timer kernel/time/timer.c:833 [inline]
 [<ffffffff8125bb86>] mod_timer+0x436/0x910 kernel/time/timer.c:925
 [<ffffffff821e6582>] sk_reset_timer+0x22/0x40 net/core/sock.c:2366
 [<ffffffff8242f897>] inet_csk_reset_xmit_timer include/net/inet_connection_sock.h:239 [inline]
 [<ffffffff8242f897>] tcp_schedule_loss_probe+0x497/0x5d0 net/ipv4/tcp_output.c:2221
 [<ffffffff82433f35>] tcp_write_xmit+0x1355/0x4570 net/ipv4/tcp_output.c:2159
 [<ffffffff82437ca7>] tcp_push_one+0xb7/0xe0 net/ipv4/tcp_output.c:2337
 [<ffffffff823f9fad>] do_tcp_sendpages net/ipv4/tcp.c:991 [inline]
 [<ffffffff823f9fad>] tcp_sendpage net/ipv4/tcp.c:1033 [inline]
 [<ffffffff823f9fad>] tcp_sendpage+0x101d/0x17c0 net/ipv4/tcp.c:1022
 [<ffffffff824a9cd3>] inet_sendpage+0x223/0x520 net/ipv4/af_inet.c:772
 [<ffffffff821d75f5>] kernel_sendpage+0x95/0xf0 net/socket.c:3320
 [<ffffffff821d76db>] sock_sendpage+0x8b/0xc0 net/socket.c:793
 [<ffffffff8153086d>] pipe_to_sendpage+0x28d/0x3d0 fs/splice.c:724
 [<ffffffff815334be>] splice_from_pipe_feed fs/splice.c:776 [inline]
 [<ffffffff815334be>] __splice_from_pipe+0x37e/0x7a0 fs/splice.c:901
 [<ffffffff81536538>] splice_from_pipe+0x108/0x170 fs/splice.c:936
 [<ffffffff815365dc>] generic_splice_sendpage+0x3c/0x50 fs/splice.c:1109
audit_printk_skb: 96 callbacks suppressed
audit: type=1400 audit(1548085836.842:6856): avc:  denied  { write } for  pid=14707 comm="syz-executor3" name="bus" dev="sda1" ino=16550 scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=system_u:object_r:userio_device_t:s0 tclass=file permissive=1
audit: type=1400 audit(1548085836.842:6857): avc:  denied  { open } for  pid=14707 comm="syz-executor3" path="/syzcgroup/cpu/syz3/bus" dev="sda1" ino=16550 scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=system_u:object_r:userio_device_t:s0 tclass=file permissive=1
audit: type=1400 audit(1548085836.892:6858): avc:  denied  { read } for  pid=14707 comm="syz-executor3" name="bus" dev="sda1" ino=16550 scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=system_u:object_r:userio_device_t:s0 tclass=file permissive=1
audit: type=1400 audit(1548085836.892:6859): avc:  denied  { ioctl } for  pid=14707 comm="syz-executor3" path="/syzcgroup/cpu/syz3/bus" dev="sda1" ino=16550 ioctlcmd=5401 scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=system_u:object_r:userio_device_t:s0 tclass=file permissive=1
 [<ffffffff81530566>] do_splice_from fs/splice.c:1128 [inline]
 [<ffffffff81530566>] direct_splice_actor+0x126/0x1a0 fs/splice.c:1294
 [<ffffffff81531e7e>] splice_direct_to_actor+0x2ce/0x850 fs/splice.c:1247
 [<ffffffff815325a5>] do_splice_direct+0x1a5/0x260 fs/splice.c:1337
 [<ffffffff81499cad>] do_sendfile+0x4ed/0xba0 fs/read_write.c:1227
audit: type=1400 audit(1548085836.992:6860): avc:  denied  { create } for  pid=14739 comm="syz-executor2" scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tclass=netlink_netfilter_socket permissive=1
 [<ffffffff8149bcc7>] SYSC_sendfile64 fs/read_write.c:1288 [inline]
 [<ffffffff8149bcc7>] SyS_sendfile64+0x137/0x150 fs/read_write.c:1274
audit: type=1400 audit(1548085837.052:6861): avc:  denied  { write } for  pid=14739 comm="syz-executor2" scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tclass=netlink_netfilter_socket permissive=1
 [<ffffffff82717c21>] entry_SYSCALL_64_fastpath+0x1e/0x9a
Code: ff ff e8 4d 35 11 ff be 7f 08 00 00 48 c7 c7 a0 24 a5 82 e8 dc db ed fe e9 48 fe ff ff 44 8b 7d d4 e9 c4 fd ff ff e8 29 35 11 ff <0f> 0b 4c 89 f7 e8 9f ea 28 ff e9 b2 fa ff ff 48 89 55 b8 e8 d1 
RIP  [<ffffffff821f5eb7>] skb_copy_and_csum_bits+0x6e7/0x800 net/core/skbuff.c:2193
 RSP <ffff8801db7072b8>
---[ end trace 9201caaca4d454d2 ]---