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 Warning: Permanently added 'ci-upstream-kasan-gce-4,10.128.0.33' (ECDSA) to the list of known hosts. net.ipv6.conf.syz0.accept_dad = 0 net.ipv6.conf.syz0.router_solicitations = 0 executing program syzkaller login: [ 42.232877] kasan: CONFIG_KASAN_INLINE enabled [ 42.237505] kasan: GPF could be caused by NULL-ptr deref or user memory access [ 42.244956] general protection fault: 0000 [#1] SMP KASAN [ 42.250474] Dumping ftrace buffer: [ 42.253978] (ftrace buffer empty) [ 42.257655] Modules linked in: [ 42.260815] CPU: 0 PID: 3017 Comm: syzkaller446772 Not tainted 4.13.0+ #68 [ 42.267793] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 42.277120] task: ffff8801cd0a4380 task.stack: ffff8801cc498000 [ 42.283146] RIP: 0010:__ip_options_echo+0xea8/0x1430 [ 42.288222] RSP: 0018:ffff8801cc49f628 EFLAGS: 00010246 [ 42.293552] RAX: dffffc0000000000 RBX: ffff8801cc49f928 RCX: 0000000000000000 [ 42.300788] RDX: 0000000000000000 RSI: 0000000000000001 RDI: 0000000000000004 [ 42.308022] RBP: ffff8801cc49f6b8 R08: ffff8801cc49f936 R09: ffffed0039893f28 [ 42.315259] R10: 0000000000000003 R11: ffffed0039893f27 R12: ffff8801cc49f918 [ 42.322494] R13: ffff8801ccbcf36c R14: 000000000000000f R15: 0000000000000018 [ 42.329730] FS: 0000000000979880(0000) GS:ffff8801db200000(0000) knlGS:0000000000000000 [ 42.337921] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 42.343775] CR2: 00000000200c0ff0 CR3: 00000001cc4ed000 CR4: 00000000001406f0 [ 42.351012] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 42.358259] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 42.365504] Call Trace: [ 42.368067] ip_cmsg_recv_offset+0xa17/0x1280 [ 42.372532] ? ip_send_unicast_reply+0x1480/0x1480 [ 42.377429] ? lock_release+0xd70/0xd70 [ 42.381370] ? check_same_owner+0x320/0x320 [ 42.385660] ? trace_hardirqs_on_caller+0x421/0x5c0 [ 42.390639] ? __skb_recv_udp+0x749/0xa90 [ 42.394762] ? __might_sleep+0x95/0x190 [ 42.398707] ? __might_fault+0x188/0x1d0 [ 42.402739] ? _copy_to_iter+0x38b/0x13a0 [ 42.406864] ? __get_user_4+0x1b/0x30 [ 42.410633] ? skb_consume_udp+0x3e0/0x3e0 [ 42.414832] ? no_context+0xe5/0x8c0 [ 42.418513] ? __lock_is_held+0xbc/0x140 [ 42.422548] ? _copy_from_iter_flushcache+0xf30/0xf30 [ 42.427702] ? pgtable_bad+0x110/0x110 [ 42.431558] ? check_stack_object+0x140/0x140 [ 42.436023] ? downgrade_write+0x150/0x150 [ 42.440228] udp_recvmsg+0xe0b/0x1260 [ 42.443999] ? udp_sendmsg+0x2c70/0x2c70 [ 42.448025] ? do_page_fault+0xee/0x720 [ 42.451966] ? check_noncircular+0x20/0x20 [ 42.456170] ? __handle_mm_fault+0x577/0x3840 [ 42.460635] ? __pmd_alloc+0x4e0/0x4e0 [ 42.464489] ? sock_has_perm+0x29c/0x400 [ 42.468516] ? selinux_tun_dev_create+0xc0/0xc0 [ 42.473154] inet_recvmsg+0x14c/0x5f0 [ 42.476924] ? inet_create+0xf50/0xf50 [ 42.480785] ? selinux_socket_recvmsg+0x36/0x40 [ 42.485422] ? security_socket_recvmsg+0x91/0xc0 [ 42.490148] ? inet_create+0xf50/0xf50 [ 42.494005] sock_recvmsg+0xc9/0x110 [ 42.497682] ? sockfd_lookup_light+0x104/0x150 [ 42.502232] SYSC_recvfrom+0x2dc/0x570 [ 42.506097] ? SYSC_getpeername+0x460/0x460 [ 42.510384] ? __handle_mm_fault+0x3840/0x3840 [ 42.514936] ? up_read+0x1a/0x40 [ 42.518271] ? __do_page_fault+0x35b/0xb60 [ 42.522484] ? SyS_setsockopt+0x215/0x360 [ 42.526598] ? lockdep_sys_exit+0x47/0xf0 [ 42.530713] ? entry_SYSCALL_64_fastpath+0x5/0xbe [ 42.535523] ? trace_hardirqs_on_caller+0x421/0x5c0 [ 42.540507] SyS_recvfrom+0x40/0x50 [ 42.544102] entry_SYSCALL_64_fastpath+0x1f/0xbe [ 42.548826] RIP: 0033:0x444c89 [ 42.551981] RSP: 002b:00007ffd80c788e8 EFLAGS: 00000286 ORIG_RAX: 000000000000002d [ 42.559652] RAX: ffffffffffffffda RBX: ffffffffffffffff RCX: 0000000000444c89 [ 42.566887] RDX: 0000000000000000 RSI: 0000000020bc0000 RDI: 0000000000000004 [ 42.574123] RBP: 0000000000000082 R08: 00000000200c0ff0 R09: 0000000000000010 [ 42.581360] R10: 0000000000000000 R11: 0000000000000286 R12: 0000000000402390 [ 42.588597] R13: 0000000000402420 R14: 0000000000000000 R15: 0000000000000000 [ 42.595842] Code: f6 c1 01 0f 85 a5 01 00 00 48 89 4d b8 e8 31 e9 6b 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 [ 42.614923] RIP: __ip_options_echo+0xea8/0x1430 RSP: ffff8801cc49f628 [ 42.621538] ---[ end trace b30d95b284222843 ]--- [ 42.626493] Kernel panic - not syncing: Fatal exception [ 42.632146] Dumping ftrace buffer: [ 42.635656] (ftrace buffer empty) [ 42.639336] Kernel Offset: disabled [ 42.642929] Rebooting in 86400 seconds..