executing program
syzkaller login: [   18.221714] ------------[ cut here ]------------
[   18.222083] WARNING: CPU: 0 PID: 2997 at ./include/net/sock.h:1507 strp_data_ready+0x2b7/0x390
[   18.222616] Kernel panic - not syncing: panic_on_warn set ...
[   18.222616] 
[   18.223086] CPU: 0 PID: 2997 Comm: syzkaller915061 Not tainted 4.14.0-rc5-next-20171018+ #8
[   18.223598] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS Bochs 01/01/2011
[   18.224125] Call Trace:
[   18.224283]  dump_stack+0x194/0x257
[   18.224526]  ? arch_local_irq_restore+0x53/0x53
[   18.224805]  ? vsnprintf+0x1ed/0x1900
[   18.225094]  panic+0x1e4/0x41c
[   18.225289]  ? refcount_error_report+0x214/0x214
[   18.225590]  ? show_regs_print_info+0x65/0x65
[   18.225861]  ? __warn+0x1a9/0x1e0
[   18.226159]  ? strp_data_ready+0x2b7/0x390
[   18.226466]  __warn+0x1c4/0x1e0
[   18.226690]  ? strp_data_ready+0x2b7/0x390
[   18.226962]  report_bug+0x211/0x2d0
[   18.227198]  fixup_bug+0x40/0x90
[   18.227419]  do_trap+0x260/0x390
[   18.227631]  do_error_trap+0x120/0x390
[   18.227889]  ? sk_filter_trim_cap+0x3f3/0x9b0
[   18.228211]  ? do_trap+0x390/0x390
[   18.228441]  ? strp_data_ready+0x2b7/0x390
[   18.228707]  ? trace_hardirqs_off_thunk+0x1a/0x1c
[   18.229060]  do_invalid_op+0x1b/0x20
[   18.229293]  invalid_op+0x18/0x20
[   18.229519] RIP: 0010:strp_data_ready+0x2b7/0x390
[   18.229813] RSP: 0018:ffff88006c80f7c8 EFLAGS: 00010293
[   18.230177] RAX: ffff88006bc72180 RBX: ffff88003acf3c48 RCX: ffffffff847af437
[   18.230623] RDX: 0000000000000000 RSI: ffff8800396d31a0 RDI: ffffffff85cc4be0
[   18.231099] RBP: ffff88006c80f7e8 R08: 0000000000000002 R09: 1ffffffff0cddfbe
[   18.231545] R10: ffff88006c80f6b0 R11: 1ffff1000d78e68b R12: ffff8800396d3100
[   18.232024] R13: ffff88003acf3c50 R14: ffff88006c80f950 R15: ffff8800396d3100
[   18.232499]  ? strp_data_ready+0x2b7/0x390
[   18.232762]  ? strp_data_ready+0x2b7/0x390
[   18.233495]  psock_data_ready+0x56/0x70
[   18.233739]  unix_dgram_sendmsg+0xa72/0x1600
[   18.234040]  ? unix_shutdown+0x870/0x870
[   18.234314]  ? avc_has_perm+0x43e/0x680
[   18.234581]  unix_seqpacket_sendmsg+0xf3/0x160
[   18.234860]  ? unix_dgram_sendmsg+0x1600/0x1600
[   18.235166]  sock_sendmsg+0xca/0x110
[   18.235420]  sock_write_iter+0x31a/0x5d0
[   18.235675]  ? sock_sendmsg+0x110/0x110
[   18.235948]  ? selinux_task_alloc+0xc0/0xc0
[   18.236235]  ? __might_sleep+0x3c/0x190
[   18.236515]  do_iter_readv_writev+0x525/0x7f0
[   18.236794]  ? vfs_dedupe_file_range+0x8f0/0x8f0
[   18.237120]  ? rw_verify_area+0xe5/0x2b0
[   18.237369]  do_iter_write+0x154/0x540
[   18.237638]  ? dup_iter+0x260/0x260
[   18.237862]  ? handle_mm_fault+0x410/0x8d0
[   18.238142]  ? __do_page_fault+0x31e/0xd60
[   18.238403]  vfs_writev+0x18a/0x340
[   18.238653]  ? __fget_light+0x297/0x380
[   18.238905]  ? vfs_iter_write+0xb0/0xb0
[   18.239164]  ? __do_page_fault+0x3d6/0xd60
[   18.239429]  ? mm_fault_error+0x2c0/0x2c0
[   18.239712]  ? dlci_ioctl_set+0x40/0x40
[   18.239996]  ? do_page_fault+0xee/0x720
[   18.240249]  ? __fdget_raw+0x20/0x20
[   18.240476]  ? __do_page_fault+0xd60/0xd60
[   18.240764]  ? selinux_capable+0x40/0x40
[   18.241091]  do_writev+0xfc/0x2a0
[   18.241413]  ? do_writev+0xfc/0x2a0
[   18.241758]  ? vfs_writev+0x340/0x340
[   18.242114]  ? entry_SYSCALL_64_fastpath+0x5/0xbe
[   18.242566]  ? trace_hardirqs_on_caller+0x421/0x5c0
[   18.243040]  SyS_writev+0x27/0x30
[   18.243366]  entry_SYSCALL_64_fastpath+0x1f/0xbe
[   18.243806] RIP: 0033:0x435049
[   18.244101] RSP: 002b:00007ffdbe2cc838 EFLAGS: 00000217 ORIG_RAX: 0000000000000014
[   18.244807] RAX: ffffffffffffffda RBX: 00000000004002b0 RCX: 0000000000435049
[   18.245479] RDX: 0000000000000005 RSI: 0000000020019fb0 RDI: 0000000000000004
[   18.246161] RBP: 0000000000000082 R08: 0000000000000000 R09: 0000000000000000
[   18.246843] R10: 0000000000000000 R11: 0000000000000217 R12: 0000000000000000
[   18.247525] R13: 00000000004019c0 R14: 0000000000401a50 R15: 0000000000000000
[   18.249100] Dumping ftrace buffer:
[   18.249500]    (ftrace buffer empty)
[   18.249847] Kernel Offset: disabled
[   18.250195] Rebooting in 86400 seconds..