executing program
syzkaller login: [   17.385733] ------------[ cut here ]------------
[   17.386634] WARNING: CPU: 3 PID: 2986 at ./include/net/sock.h:1507 strp_data_ready+0x2b7/0x390
[   17.387663] Kernel panic - not syncing: panic_on_warn set ...
[   17.387663] 
[   17.388318] CPU: 3 PID: 2986 Comm: syzkaller775022 Not tainted 4.14.0-rc5-next-20171018+ #8
[   17.389072] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS Bochs 01/01/2011
[   17.389798] Call Trace:
[   17.390052]  dump_stack+0x194/0x257
[   17.390401]  ? arch_local_irq_restore+0x53/0x53
[   17.390840]  ? vsnprintf+0x1ed/0x1900
[   17.393640]  panic+0x1e4/0x41c
[   17.393930]  ? refcount_error_report+0x214/0x214
[   17.394625]  ? show_regs_print_info+0x65/0x65
[   17.395111]  ? __warn+0x1a9/0x1e0
[   17.395423]  ? strp_data_ready+0x2b7/0x390
[   17.395832]  __warn+0x1c4/0x1e0
[   17.396270]  ? strp_data_ready+0x2b7/0x390
[   17.396680]  report_bug+0x211/0x2d0
[   17.397052]  fixup_bug+0x40/0x90
[   17.397378]  do_trap+0x260/0x390
[   17.397704]  do_error_trap+0x120/0x390
[   17.398051]  ? sk_filter_trim_cap+0x3f3/0x9b0
[   17.398457]  ? do_trap+0x390/0x390
[   17.398779]  ? strp_data_ready+0x2b7/0x390
[   17.399173]  ? trace_hardirqs_off_thunk+0x1a/0x1c
[   17.399621]  do_invalid_op+0x1b/0x20
[   17.399953]  invalid_op+0x18/0x20
[   17.400262] RIP: 0010:strp_data_ready+0x2b7/0x390
[   17.400680] RSP: 0018:ffff88003bc077d8 EFLAGS: 00010293
[   17.401354] RAX: ffff880039cbe540 RBX: ffff8800698e4c48 RCX: ffffffff847af437
[   17.401986] RDX: 0000000000000000 RSI: ffff880069d31860 RDI: ffffffff85cc4be0
[   17.402708] RBP: ffff88003bc077f8 R08: 0000000000000002 R09: 1ffffffff0cddfbe
[   17.403411] R10: ffff88003bc076c0 R11: 1ffff10007397f03 R12: ffff880069d317c0
[   17.404150] R13: ffff8800698e4c50 R14: ffff88003bc07960 R15: ffff880069d317c0
[   17.405080]  ? strp_data_ready+0x2b7/0x390
[   17.405503]  ? strp_data_ready+0x2b7/0x390
[   17.405930]  psock_data_ready+0x56/0x70
[   17.406295]  unix_dgram_sendmsg+0xa72/0x1600
[   17.406703]  ? unix_shutdown+0x870/0x870
[   17.407070]  ? kasan_check_write+0x14/0x20
[   17.407464]  unix_seqpacket_sendmsg+0xf3/0x160
[   17.407979]  ? unix_dgram_sendmsg+0x1600/0x1600
[   17.408392]  sock_sendmsg+0xca/0x110
[   17.408721]  ___sys_sendmsg+0x31c/0x890
[   17.409085]  ? copy_msghdr_from_user+0x590/0x590
[   17.409514]  ? find_held_lock+0x35/0x1d0
[   17.409911]  ? handle_mm_fault+0x248/0x8d0
[   17.410296]  ? __fget_light+0x297/0x380
[   17.410665]  ? fget_raw+0x20/0x20
[   17.410993]  ? __do_page_fault+0x64c/0xd60
[   17.411389]  ? lock_downgrade+0x990/0x990
[   17.411776]  ? __fdget+0x18/0x20
[   17.412081]  __sys_sendmmsg+0x1e6/0x5f0
[   17.412430]  ? __sys_sendmmsg+0x1e6/0x5f0
[   17.412803]  ? SyS_sendmsg+0x50/0x50
[   17.413373]  ? mm_fault_error+0x2c0/0x2c0
[   17.413746]  ? do_vfs_ioctl+0x486/0x1520
[   17.414107]  ? _cond_resched+0x14/0x30
[   17.414475]  ? __fd_install+0x69b/0x6a0
[   17.414829]  ? sock_map_fd+0x53/0x70
[   17.415169]  ? trace_hardirqs_on_caller+0x421/0x5c0
[   17.415619]  SyS_sendmmsg+0x35/0x60
[   17.415948]  entry_SYSCALL_64_fastpath+0x1f/0xbe
[   17.416365] RIP: 0033:0x435009
[   17.416649] RSP: 002b:00007ffdaad61c08 EFLAGS: 00000217 ORIG_RAX: 0000000000000133
[   17.422197] RAX: ffffffffffffffda RBX: 00000000004002b0 RCX: 0000000000435009
[   17.422839] RDX: 0000000000000001 RSI: 0000000020e83fc4 RDI: 0000000000000004
[   17.423598] RBP: 0000000000000082 R08: 0000000000000000 R09: 0000000000000000
[   17.424227] R10: 0000000000000000 R11: 0000000000000217 R12: 0000000000000000
[   17.424859] R13: 0000000000401980 R14: 0000000000401a10 R15: 0000000000000000
[   17.429086] Dumping ftrace buffer:
[   17.429520]    (ftrace buffer empty)
[   17.429845] Kernel Offset: disabled
[   17.430171] Rebooting in 86400 seconds..