[....] Starting enhanced syslogd: rsyslogd[ 13.072489] audit: type=1400 audit(1516871471.337:4): avc: denied { syslog } for pid=3177 comm="rsyslogd" capability=34 scontext=system_u:system_r:kernel_t:s0 tcontext=system_u:system_r:kernel_t:s0 tclass=capability2 permissive=1 [?25l[?1c7[ ok 8[?25h[?0c. [....] Starting periodic command scheduler: cron[?25l[?1c7[ ok 8[?25h[?0c. Starting mcstransd: [....] Starting file context maintaining daemon: restorecond[?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 '10.128.0.50' (ECDSA) to the list of known hosts. net.ipv6.conf.syz0.accept_dad = 0 net.ipv6.conf.syz0.router_solicitations = 0 RTNETLINK answers: Operation not supported RTNETLINK answers: Operation not supported RTNETLINK answers: Operation not supported RTNETLINK answers: Operation not supported Cannot find device "bridge0" Cannot find device "bridge0" Cannot find device "bridge0" Cannot find device "bridge0" Cannot find device "vcan0" Cannot find device "vcan0" Cannot find device "vcan0" Cannot find device "vcan0" RTNETLINK answers: Operation not supported Cannot find device "gre0" Cannot find device "gre0" Cannot find device "gre0" Cannot find device "gre0" Cannot find device "gretap0" Cannot find device "gretap0" Cannot find device "gretap0" Cannot find device "gretap0" Cannot find device "ip_vti0" Cannot find device "ip_vti0" Cannot find device "ip_vti0" Cannot find device "ip_vti0" Cannot find device "ip6_vti0" Cannot find device "ip6_vti0" Cannot find device "ip6_vti0" Cannot find device "ip6_vti0" Cannot find device "ip6tnl0" Cannot find device "ip6tnl0" Cannot find device "ip6tnl0" Cannot find device "ip6tnl0" Cannot find device "ip6gre0" Cannot find device "ip6gre0" Cannot find device "ip6gre0" Cannot find device "ip6gre0" Cannot find device "ip6gretap0" Cannot find device "ip6gretap0" Cannot find device "ip6gretap0" Cannot find device "ip6gretap0" Cannot find device "erspan0" Cannot find device "erspan0" Cannot find device "erspan0" Cannot find device "erspan0" executing program syzkaller login: [ 27.039105] ------------[ cut here ]------------ [ 27.044702] WARNING: CPU: 0 PID: 3334 at mm/page_alloc.c:3550 __alloc_pages_slowpath+0x1136/0x1d90 [ 27.053821] Kernel panic - not syncing: panic_on_warn set ... [ 27.053821] [ 27.061171] CPU: 0 PID: 3334 Comm: syzkaller733252 Not tainted 4.9.78-g29eadc4 #20 [ 27.068850] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 27.078181] ffff8801c980eac0 ffffffff81d943a9 ffffffff83a47c40 ffff8801c980eb98 [ 27.086156] ffffffff83aa4e00 ffffffff81452df6 0000000000000009 ffff8801c980eb88 [ 27.094142] ffffffff8142f451 0000000041b58ab3 ffffffff8418ac30 ffffffff8142f295 [ 27.102149] Call Trace: [ 27.104710] [] dump_stack+0xc1/0x128 [ 27.110052] [] ? __alloc_pages_slowpath+0x1136/0x1d90 [ 27.116862] [] panic+0x1bc/0x3a8 [ 27.121850] [] ? percpu_up_read_preempt_enable.constprop.53+0xd7/0xd7 [ 27.130050] [] ? load_image_and_restore+0xf9/0xf9 [ 27.136516] [] ? __warn+0x1a9/0x1e0 [ 27.141779] [] ? __alloc_pages_slowpath+0x1136/0x1d90 [ 27.148588] [] __warn+0x1c4/0x1e0 [ 27.153663] [] warn_slowpath_null+0x2c/0x40 [ 27.159607] [] __alloc_pages_slowpath+0x1136/0x1d90 [ 27.166245] [] ? _raw_spin_unlock_irqrestore+0x5a/0x70 [ 27.173165] [] ? trace_hardirqs_on_caller+0x38b/0x590 [ 27.179980] [] ? _raw_spin_unlock_irqrestore+0x45/0x70 [ 27.186883] [] ? gfp_pfmemalloc_allowed+0x110/0x110 [ 27.193522] [] ? get_page_from_freelist+0xcff/0x19f0 [ 27.200262] [] ? __might_sleep+0x95/0x1a0 [ 27.206046] [] __alloc_pages_nodemask+0x33b/0x6b0 [ 27.212526] [] ? __alloc_pages_slowpath+0x1d90/0x1d90 [ 27.219345] [] kmalloc_order+0x2a/0x70 [ 27.227462] [] kmalloc_order_trace+0x1f/0x190 [ 27.233581] [] __kmalloc+0x19d/0x310 [ 27.238923] [] ? tun_device_event+0x342/0xa50 [ 27.245060] [] tun_device_event+0x398/0xa50 [ 27.251033] [] notifier_call_chain+0x90/0x1a0 [ 27.257158] [] raw_notifier_call_chain+0x2d/0x40 [ 27.263553] [] call_netdevice_notifiers_info+0x51/0x90 [ 27.270456] [] call_netdevice_notifiers+0x70/0xa0 [ 27.276928] [] ? call_netdevice_notifiers_info+0x90/0x90 [ 27.284024] [] do_setlink+0xba6/0x2f80 [ 27.289536] [] ? rtnl_unregister+0x150/0x150 [ 27.295580] [] ? __lock_acquire+0x629/0x3640 [ 27.301615] [] ? debug_check_no_locks_freed+0x2c0/0x2c0 [ 27.308607] [] ? validate_nla+0x157/0x4b0 [ 27.316034] [] ? full_name_hash+0x9b/0xe0 [ 27.321820] [] rtnl_newlink+0xd6d/0x1550 [ 27.327507] [] ? rtnl_link_unregister+0x270/0x270 [ 27.333983] [] ? avc_has_perm_noaudit+0x2b7/0x450 [ 27.340454] [] ? avc_has_perm_noaudit+0xa2/0x450 [ 27.346845] [] ? avc_has_extended_perms+0xf10/0xf10 [ 27.353489] [] ? security_capable+0x8e/0xc0 [ 27.359452] [] ? ns_capable_common+0xcf/0x160 [ 27.365573] [] ? ns_capable+0x22/0x30 [ 27.371015] [] ? __netlink_ns_capable+0xe1/0x120 [ 27.377400] [] ? rtnl_link_unregister+0x270/0x270 [ 27.383870] [] rtnetlink_rcv_msg+0x4c3/0x640 [ 27.389900] [] ? rtnl_newlink+0x1550/0x1550 [ 27.395844] [] ? rtnetlink_rcv+0x1b/0x40 [ 27.401546] [] ? mutex_lock_killable_nested+0x960/0x960 [ 27.408537] [] netlink_rcv_skb+0x13e/0x370 [ 27.414409] [] ? rtnl_newlink+0x1550/0x1550 [ 27.420355] [] rtnetlink_rcv+0x2a/0x40 [ 27.425866] [] netlink_unicast+0x511/0x750 [ 27.431736] [] ? netlink_unicast+0x43c/0x750 [ 27.437775] [] ? netlink_attachskb+0x680/0x680 [ 27.443983] [] netlink_sendmsg+0x8e8/0xc50 [ 27.449843] [] ? netlink_unicast+0x750/0x750 [ 27.455879] [] ? selinux_socket_sendmsg+0x3f/0x50 [ 27.462346] [] ? security_socket_sendmsg+0x89/0xb0 [ 27.468903] [] ? netlink_unicast+0x750/0x750 [ 27.474946] [] sock_sendmsg+0xca/0x110 [ 27.480467] [] ___sys_sendmsg+0x6d1/0x7e0 [ 27.486245] [] ? copy_msghdr_from_user+0x550/0x550 [ 27.492810] [] ? __lru_cache_add+0x187/0x250 [ 27.498856] [] ? do_huge_pmd_anonymous_page+0xb05/0x10d0 [ 27.505950] [] ? _raw_spin_unlock+0x2c/0x50 [ 27.511900] [] ? do_huge_pmd_anonymous_page+0x2d4/0x10d0 [ 27.518991] [] ? handle_mm_fault+0x6ee/0x2530 [ 27.525121] [] ? __lock_is_held+0xa1/0xf0 [ 27.530913] [] ? __pmd_alloc+0x410/0x410 [ 27.536615] [] ? __fget_light+0x158/0x1e0 [ 27.542387] [] ? __fdget+0x18/0x20 [ 27.547553] [] __sys_sendmsg+0xd6/0x190 [ 27.553149] [] ? SyS_shutdown+0x1b0/0x1b0 [ 27.558937] [] ? __do_page_fault+0x5ec/0xd40 [ 27.564974] [] ? __do_page_fault+0x3bd/0xd40 [ 27.571023] [] ? trace_hardirqs_on_caller+0x38b/0x590 [ 27.577839] [] SyS_sendmsg+0x2d/0x50 [ 27.583177] [] entry_SYSCALL_64_fastpath+0x29/0xe8 [ 27.590367] Dumping ftrace buffer: [ 27.593938] (ftrace buffer empty) [ 27.597622] Kernel Offset: disabled [ 27.601237] Rebooting in 86400 seconds..