Pseudo-terminal will not be allocated because stdin is not a terminal.
Warning: Permanently added 'ci-upstream-kasan-gce-7,10.128.0.37' (ECDSA) to the list of known hosts.
Warning: Permanently added '[ssh-serialport.googleapis.com]:9600,[216.239.38.127]:9600' (RSA) to the list of known hosts.
net.ipv6.conf.syz0.accept_dad = 0
net.ipv6.conf.syz0.router_solicitations = 0
executing program
serialport: Connected to syzkaller.us-central1-c.ci-upstream-kasan-gce-7 port 1 (session ID: 83fe68d3edeec63d63965dabe49d9d420af317630d9eeb54ea37d582d2864a36, active connections: 1).
INIT: Entering runlevel: 2

[info] Using makefile-style concurrent boot in runlevel 2.
[....] Starting enhanced syslogd: rsyslogd[?25l[?1c7[ ok 8[?25h[?0c.
[....] Starting periodic command scheduler: cron[?25l[?1c7[ ok 8[?25h[?0c.
[....] Starting OpenBSD Secure Shell server: sshd[?25l[?1c7[ ok 8[?25h[?0c.

Debian GNU/Linux 7 syzkaller ttyS0

syzkaller login: [   41.790774] kasan: CONFIG_KASAN_INLINE enabled
[   41.791534] kasan: GPF could be caused by NULL-ptr deref or user memory access
[   41.792706] general protection fault: 0000 [#1] SMP KASAN
[   41.793442] Dumping ftrace buffer:
[   41.793915]    (ftrace buffer empty)
[   41.794409] Modules linked in:
[   41.794841] CPU: 0 PID: 2943 Comm: syzkaller425979 Not tainted 4.13.0-rc2+ #4
[   41.795795] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
[   41.797014] task: ffff8801d35cc680 task.stack: ffff8801d03e8000
[   41.797816] RIP: 0010:__ip_options_echo+0xea8/0x1430
[   41.798489] RSP: 0018:ffff8801d03ef628 EFLAGS: 00010246
[   41.799224] RAX: dffffc0000000000 RBX: ffff8801d03ef928 RCX: 0000000000000000
[   41.800174] RDX: 0000000000000000 RSI: 0000000000000001 RDI: 0000000000000004
[   41.801124] RBP: ffff8801d03ef6b8 R08: ffff8801d03ef938 R09: ffffed003a07df28
[   41.802074] R10: 0000000000000003 R11: ffffed003a07df27 R12: ffff8801d03ef918
[   41.803022] R13: ffff8801d0259e6c R14: 0000000000000011 R15: 0000000000000018
[   41.803973] FS:  00007fe33bc31700(0000) GS:ffff8801dc000000(0000) knlGS:0000000000000000
[   41.805099] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[   41.805882] CR2: 0000000020ec0000 CR3: 00000001d1762000 CR4: 00000000001406f0
[   41.806834] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[   41.807787] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[   41.808735] Call Trace:
[   41.809095]  ip_cmsg_recv_offset+0xa17/0x1280
[   41.809694]  ? lock_downgrade+0x990/0x990
[   41.810259]  ? ip_send_unicast_reply+0x1480/0x1480
[   41.810937]  ? lock_release+0xa40/0xa40
[   41.814881]  ? check_same_owner+0x320/0x320
[   41.819176]  ? trace_hardirqs_on_caller+0x421/0x5c0
[   41.824158]  ? __skb_recv_udp+0x749/0xa90
[   41.828270]  ? __might_sleep+0x95/0x190
[   41.832209]  ? __might_fault+0x188/0x1d0
[   41.836236]  ? _copy_to_iter+0x38b/0x13a0
[   41.840349]  ? skb_consume_udp+0x3d0/0x3d0
[   41.844548]  ? _copy_from_iter_flushcache+0xf30/0xf30
[   41.849700]  ? lock_downgrade+0x990/0x990
[   41.853815]  ? check_stack_object+0x140/0x140
[   41.858278]  ? lock_release+0xa40/0xa40
[   41.862222]  udp_recvmsg+0xe5a/0x1260
[   41.865990]  ? udp4_seq_show+0x7d0/0x7d0
[   41.870012]  ? iterate_fd+0x3f0/0x3f0
[   41.873784]  ? sock_has_perm+0x29c/0x400
[   41.877811]  ? selinux_tun_dev_create+0xc0/0xc0
[   41.882444]  inet_recvmsg+0x14c/0x5f0
[   41.886210]  ? inet_create+0xf50/0xf50
[   41.890062]  ? check_noncircular+0x20/0x20
[   41.894263]  ? selinux_socket_recvmsg+0x36/0x40
[   41.898895]  ? security_socket_recvmsg+0x91/0xc0
[   41.903617]  ? inet_create+0xf50/0xf50
[   41.907467]  sock_recvmsg+0xc9/0x110
[   41.911144]  ? sockfd_lookup_light+0x104/0x150
[   41.915689]  SYSC_recvfrom+0x2d6/0x570
[   41.919541]  ? SYSC_getpeername+0x460/0x460
[   41.923827]  ? finish_task_switch+0x1d3/0x740
[   41.928285]  ? lock_downgrade+0x990/0x990
[   41.932396]  ? do_raw_spin_trylock+0x190/0x190
[   41.936942]  ? lock_release+0xa40/0xa40
[   41.940883]  ? trace_hardirqs_on_caller+0x421/0x5c0
[   41.945868]  ? syscall_return_slowpath+0x22f/0x450
[   41.950758]  ? prepare_exit_to_usermode+0x220/0x220
[   41.955736]  ? entry_SYSCALL_64_fastpath+0x5/0xbe
[   41.960540]  ? trace_hardirqs_on_caller+0x421/0x5c0
[   41.965520]  SyS_recvfrom+0x40/0x50
[   41.969111]  entry_SYSCALL_64_fastpath+0x1f/0xbe
[   41.973827] RIP: 0033:0x44a209
[   41.976980] RSP: 002b:00007fe33bc30d88 EFLAGS: 00000212 ORIG_RAX: 000000000000002d
[   41.984653] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 000000000044a209
[   41.991887] RDX: 0000000000000000 RSI: 00000000207af000 RDI: 0000000000000004
[   41.999118] RBP: 0000000000000086 R08: 0000000020efefa0 R09: 0000000000000060
[   42.006349] R10: 0000000000000000 R11: 0000000000000212 R12: 0000000000000000
[   42.013580] R13: 00007ffe8d85444f R14: 00007fe33bc319c0 R15: 0000000000000000
[   42.020820] Code: f6 c1 01 0f 85 a5 01 00 00 48 89 4d b8 e8 c1 c6 f6 fd 48 8b 4d b8 48 b8 00 00 00 00 00 fc ff df 48 83 e1 fe 48 89 ca 48 c1 ea 03 <80> 3c 02 00 0f 85 41 02 00 00 48 8b 09 48 b8 00 00 00 00 00 fc 
[   42.039882] RIP: __ip_options_echo+0xea8/0x1430 RSP: ffff8801d03ef628
[   42.046600] ---[ end trace 39dcd3aac1c4535f ]---
[   42.051343] Kernel panic - not syncing: Fatal exception
[   42.057080] Dumping ftrace buffer:
[   42.060590]    (ftrace buffer empty)
[   42.064266] Kernel Offset: disabled
[   42.067861] Rebooting in 86400 seconds..