audit: type=1400 audit(1519099467.110:8): avc:  denied  { map } for  pid=4165 comm="syz-execprog" path="/root/syzkaller-shm405353969" dev="sda1" ino=16482 scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=unconfined_u:object_r:file_t:s0 tclass=file permissive=1
IPVS: ftp: loaded support on port[0] = 21
IPv6: ADDRCONF(NETDEV_UP): bridge0: link is not ready
WARNING: CPU: 0 PID: 4300 at net/ipv4/tcp_input.c:2199 tcp_mark_head_lost+0x770/0x8f0 net/ipv4/tcp_input.c:2199
Kernel panic - not syncing: panic_on_warn set ...

CPU: 0 PID: 4300 Comm: syz-executor0 Not tainted 4.16.0-rc2+ #320
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Call Trace:
 __dump_stack lib/dump_stack.c:17 [inline]
 dump_stack+0x194/0x257 lib/dump_stack.c:53
 panic+0x1e4/0x41c kernel/panic.c:183
 __warn+0x1dc/0x200 kernel/panic.c:547
 report_bug+0x211/0x2d0 lib/bug.c:184
 fixup_bug.part.11+0x37/0x80 arch/x86/kernel/traps.c:178
 fixup_bug arch/x86/kernel/traps.c:247 [inline]
 do_error_trap+0x2d7/0x3e0 arch/x86/kernel/traps.c:296
 do_invalid_op+0x1b/0x20 arch/x86/kernel/traps.c:315
 invalid_op+0x58/0x80 arch/x86/entry/entry_64.S:957
RIP: 0010:tcp_mark_head_lost+0x770/0x8f0 net/ipv4/tcp_input.c:2199
RSP: 0018:ffff8801b18ff580 EFLAGS: 00010293
RAX: ffff8801b07a6440 RBX: 0000000000000004 RCX: ffffffff849c1520
RDX: 0000000000000000 RSI: ffff8801b247bd1c RDI: ffff8801b247bdb4
RBP: ffff8801b18ff600 R08: ffff8801b247bc88 R09: ffff8801b18ff970
R10: 0000000000000003 R11: 0000000000000000 R12: ffff8801b247b500
R13: dffffc0000000000 R14: ffff8801b39e4875 R15: 0000000000000000
 tcp_update_scoreboard net/ipv4/tcp_input.c:2209 [inline]
 tcp_fastretrans_alert+0xe85/0x2260 net/ipv4/tcp_input.c:2857
 tcp_ack+0x2b5c/0x51a0 net/ipv4/tcp_input.c:3627
 tcp_rcv_state_process+0xc24/0x4840 net/ipv4/tcp_input.c:5887
 tcp_v4_do_rcv+0x55c/0x7d0 net/ipv4/tcp_ipv4.c:1491
 sk_backlog_rcv include/net/sock.h:908 [inline]
 __release_sock+0x124/0x360 net/core/sock.c:2271
 release_sock+0xa4/0x2a0 net/core/sock.c:2786
 inet_shutdown+0x1a8/0x350 net/ipv4/af_inet.c:855
 SYSC_shutdown net/socket.c:1901 [inline]
 SyS_shutdown+0x137/0x290 net/socket.c:1892
 do_syscall_64+0x280/0x940 arch/x86/entry/common.c:287
 entry_SYSCALL_64_after_hwframe+0x42/0xb7
RIP: 0033:0x453da9
RSP: 002b:00007ffeca220f38 EFLAGS: 00000246 ORIG_RAX: 0000000000000030
RAX: ffffffffffffffda RBX: 0000000000f89914 RCX: 0000000000453da9
RDX: 0000000000000000 RSI: 0000000000000001 RDI: 0000000000000003
RBP: 000000000072bea0 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 00000000ffffffff
R13: 00000000000005bb R14: 00000000006f8a28 R15: 0000000000000009
Dumping ftrace buffer:
   (ftrace buffer empty)
Kernel Offset: disabled
Rebooting in 86400 seconds..