[....] Starting enhanced syslogd: rsyslogd[ 13.590297] audit: type=1400 audit(1517936249.554:4): avc: denied { syslog } for pid=3649 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 '10.128.15.194' (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: [ 47.845219] ------------[ cut here ]------------ [ 47.850202] WARNING: CPU: 1 PID: 3821 at mm/page_alloc.c:3544 __alloc_pages_slowpath+0x1136/0x1d90 [ 47.859274] Kernel panic - not syncing: panic_on_warn set ... [ 47.859274] [ 47.866612] CPU: 1 PID: 3821 Comm: syzkaller772277 Not tainted 4.9.80-g550c01d #37 [ 47.874299] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 47.883625] ffff8801d769ea50 ffffffff81d94b69 ffffffff83a47c40 ffff8801d769eb28 [ 47.891631] ffffffff83aa4e00 ffffffff81452f16 0000000000000009 ffff8801d769eb18 [ 47.899592] ffffffff8142f541 0000000041b58ab3 ffffffff8418ab20 ffffffff8142f385 [ 47.907567] Call Trace: [ 47.910127] [] dump_stack+0xc1/0x128 [ 47.915469] [] ? __alloc_pages_slowpath+0x1136/0x1d90 [ 47.922293] [] panic+0x1bc/0x3a8 [ 47.927298] [] ? percpu_up_read_preempt_enable.constprop.53+0xd7/0xd7 [ 47.935496] [] ? load_image_and_restore+0xf9/0xf9 [ 47.941958] [] ? __warn+0x1a9/0x1e0 [ 47.947207] [] ? __alloc_pages_slowpath+0x1136/0x1d90 [ 47.954032] [] __warn+0x1c4/0x1e0 [ 47.959123] [] warn_slowpath_null+0x2c/0x40 [ 47.965063] [] __alloc_pages_slowpath+0x1136/0x1d90 [ 47.971697] [] ? _raw_spin_unlock_irqrestore+0x5a/0x70 [ 47.978595] [] ? trace_hardirqs_on_caller+0x38b/0x590 [ 47.985402] [] ? _raw_spin_unlock_irqrestore+0x45/0x70 [ 47.992295] [] ? gfp_pfmemalloc_allowed+0x110/0x110 [ 47.998930] [] ? get_page_from_freelist+0xcff/0x19f0 [ 48.005654] [] ? __might_sleep+0x95/0x1a0 [ 48.011421] [] __alloc_pages_nodemask+0x33b/0x6b0 [ 48.017884] [] ? __alloc_pages_slowpath+0x1d90/0x1d90 [ 48.024695] [] kmalloc_order+0x2a/0x70 [ 48.030205] [] kmalloc_order_trace+0x1f/0x190 [ 48.036318] [] __kmalloc+0x19d/0x310 [ 48.041662] [] ? tun_device_event+0x342/0xa50 [ 48.047778] [] tun_device_event+0x398/0xa50 [ 48.053721] [] notifier_call_chain+0x90/0x1a0 [ 48.059837] [] raw_notifier_call_chain+0x2d/0x40 [ 48.066224] [] call_netdevice_notifiers_info+0x51/0x90 [ 48.073126] [] call_netdevice_notifiers+0x70/0xa0 [ 48.079587] [] ? call_netdevice_notifiers_info+0x90/0x90 [ 48.086667] [] do_setlink+0xba6/0x2f80 [ 48.092182] [] ? rtnl_unregister+0x150/0x150 [ 48.098213] [] ? debug_check_no_locks_freed+0x2c0/0x2c0 [ 48.105195] [] ? __lock_acquire+0x629/0x3640 [ 48.111225] [] ? debug_check_no_locks_freed+0x2c0/0x2c0 [ 48.118207] [] ? update_stack_state.constprop.5+0xca/0x150 [ 48.125450] [] ? __unwind_start+0x1e3/0x3c0 [ 48.131477] [] ? debug_check_no_locks_freed+0x2c0/0x2c0 [ 48.138458] [] ? validate_nla+0x157/0x4b0 [ 48.144226] [] ? full_name_hash+0x9b/0xe0 [ 48.149991] [] rtnl_newlink+0xd6d/0x1550 [ 48.155670] [] ? rtnl_link_unregister+0x270/0x270 [ 48.162133] [] ? avc_has_perm_noaudit+0x2b7/0x450 [ 48.168593] [] ? avc_has_perm_noaudit+0xa2/0x450 [ 48.174971] [] ? avc_has_extended_perms+0xf10/0xf10 [ 48.181616] [] ? security_capable+0x8e/0xc0 [ 48.187557] [] ? ns_capable_common+0xcf/0x160 [ 48.193671] [] ? ns_capable+0x22/0x30 [ 48.199102] [] ? __netlink_ns_capable+0xe1/0x120 [ 48.205477] [] ? rtnl_link_unregister+0x270/0x270 [ 48.211939] [] rtnetlink_rcv_msg+0x4c3/0x640 [ 48.217967] [] ? rtnl_newlink+0x1550/0x1550 [ 48.223907] [] ? rtnetlink_rcv+0x1b/0x40 [ 48.229588] [] ? mutex_lock_killable_nested+0x960/0x960 [ 48.236570] [] netlink_rcv_skb+0x13e/0x370 [ 48.242425] [] ? rtnl_newlink+0x1550/0x1550 [ 48.248365] [] rtnetlink_rcv+0x2a/0x40 [ 48.253871] [] netlink_unicast+0x511/0x750 [ 48.259726] [] ? netlink_unicast+0x43c/0x750 [ 48.265753] [] ? netlink_attachskb+0x680/0x680 [ 48.271963] [] netlink_sendmsg+0x8e8/0xc50 [ 48.277817] [] ? netlink_unicast+0x750/0x750 [ 48.283850] [] ? move_addr_to_kernel.part.12+0xd2/0x120 [ 48.290833] [] ? selinux_socket_sendmsg+0x3f/0x50 [ 48.297305] [] ? security_socket_sendmsg+0x89/0xb0 [ 48.303857] [] ? netlink_unicast+0x750/0x750 [ 48.309883] [] sock_sendmsg+0xca/0x110 [ 48.315388] [] ___sys_sendmsg+0x6d1/0x7e0 [ 48.321154] [] ? copy_msghdr_from_user+0x550/0x550 [ 48.327702] [] ? __lru_cache_add+0x187/0x250 [ 48.333741] [] ? do_huge_pmd_anonymous_page+0xb05/0x10d0 [ 48.340809] [] ? _raw_spin_unlock+0x2c/0x50 [ 48.346749] [] ? do_huge_pmd_anonymous_page+0x2d4/0x10d0 [ 48.353821] [] ? handle_mm_fault+0x6ee/0x2530 [ 48.359933] [] ? __fget_light+0x158/0x1e0 [ 48.365696] [] ? __fdget+0x18/0x20 [ 48.370858] [] ? sockfd_lookup_light+0x118/0x160 [ 48.377233] [] __sys_sendmsg+0xd6/0x190 [ 48.382826] [] ? SyS_shutdown+0x1b0/0x1b0 [ 48.388593] [] ? __do_page_fault+0x5ec/0xd40 [ 48.394622] [] compat_SyS_sendmsg+0x2a/0x40 [ 48.400563] [] ? compat_SyS_getsockopt+0x2a0/0x2a0 [ 48.407115] [] do_fast_syscall_32+0x2f7/0x890 [ 48.413228] [] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 48.419862] [] entry_SYSENTER_compat+0x74/0x83 [ 48.426547] Dumping ftrace buffer: [ 48.430093] (ftrace buffer empty) [ 48.433772] Kernel Offset: disabled [ 48.437385] Rebooting in 86400 seconds..