[....] Starting enhanced syslogd: rsyslogd[ 10.914158] audit: type=1400 audit(1516837903.670:4): avc: denied { syslog } for pid=3182 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[1G[[32m ok [39;49m8[?25h[?0c. [....] Starting periodic command scheduler: cron[?25l[?1c7[1G[[32m ok [39;49m8[?25h[?0c. Starting mcstransd: [....] Starting file context maintaining daemon: restorecond[?25l[?1c7[1G[[32m ok [39;49m8[?25h[?0c. [....] Starting OpenBSD Secure Shell server: sshd[?25l[?1c7[1G[[32m ok [39;49m8[?25h[?0c. Debian GNU/Linux 7 syzkaller ttyS0 Warning: Permanently added '10.128.0.11' (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: [ 19.183438] ------------[ cut here ]------------ [ 19.184316] WARNING: CPU: 1 PID: 3330 at mm/page_alloc.c:3550 __alloc_pages_slowpath+0x1136/0x1d90 [ 19.185557] Kernel panic - not syncing: panic_on_warn set ... [ 19.185557] [ 19.186585] CPU: 1 PID: 3330 Comm: syzkaller160154 Not tainted 4.9.78-g29eadc4 #29 [ 19.187597] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 19.188849] ffff8801c7fb6a50 ffffffff81d943a9 ffffffff83a47c40 ffff8801c7fb6b28 [ 19.190515] ffffffff83aa4e00 ffffffff81452df6 0000000000000009 ffff8801c7fb6b18 [ 19.191748] ffffffff8142f451 0000000041b58ab3 ffffffff8418ac30 ffffffff8142f295 [ 19.193093] Call Trace: [ 19.193550] [] dump_stack+0xc1/0x128 [ 19.194302] [] ? __alloc_pages_slowpath+0x1136/0x1d90 [ 19.195266] [] panic+0x1bc/0x3a8 [ 19.195970] [] ? percpu_up_read_preempt_enable.constprop.53+0xd7/0xd7 [ 19.197048] [] ? load_image_and_restore+0xf9/0xf9 [ 19.197925] [] ? __warn+0x1a9/0x1e0 [ 19.198645] [] ? __alloc_pages_slowpath+0x1136/0x1d90 [ 19.199941] [] __warn+0x1c4/0x1e0 [ 19.200727] [] warn_slowpath_null+0x2c/0x40 [ 19.201538] [] __alloc_pages_slowpath+0x1136/0x1d90 [ 19.202417] [] ? _raw_spin_unlock_irqrestore+0x5a/0x70 [ 19.203386] [] ? trace_hardirqs_on_caller+0x38b/0x590 [ 19.209499] [] ? _raw_spin_unlock_irqrestore+0x45/0x70 [ 19.216393] [] ? gfp_pfmemalloc_allowed+0x110/0x110 [ 19.223027] [] ? get_page_from_freelist+0xcff/0x19f0 [ 19.229752] [] ? __might_sleep+0x95/0x1a0 [ 19.235516] [] __alloc_pages_nodemask+0x33b/0x6b0 [ 19.241980] [] ? __alloc_pages_slowpath+0x1d90/0x1d90 [ 19.248789] [] kmalloc_order+0x2a/0x70 [ 19.254293] [] kmalloc_order_trace+0x1f/0x190 [ 19.260406] [] __kmalloc+0x19d/0x310 [ 19.265738] [] ? tun_device_event+0x342/0xa50 [ 19.271854] [] tun_device_event+0x398/0xa50 [ 19.277796] [] notifier_call_chain+0x90/0x1a0 [ 19.283913] [] raw_notifier_call_chain+0x2d/0x40 [ 19.290291] [] call_netdevice_notifiers_info+0x51/0x90 [ 19.297185] [] call_netdevice_notifiers+0x70/0xa0 [ 19.303658] [] ? call_netdevice_notifiers_info+0x90/0x90 [ 19.310731] [] do_setlink+0xba6/0x2f80 [ 19.316235] [] ? rtnl_unregister+0x150/0x150 [ 19.322267] [] ? debug_check_no_locks_freed+0x2c0/0x2c0 [ 19.329262] [] ? __lock_acquire+0x629/0x3640 [ 19.335297] [] ? __lock_acquire+0x1433/0x3640 [ 19.341414] [] ? debug_check_no_locks_freed+0x2c0/0x2c0 [ 19.348398] [] ? validate_nla+0x157/0x4b0 [ 19.354166] [] ? full_name_hash+0x9b/0xe0 [ 19.359935] [] rtnl_newlink+0xd6d/0x1550 [ 19.365614] [] ? rtnl_link_unregister+0x270/0x270 [ 19.372075] [] ? avc_has_perm_noaudit+0x2b7/0x450 [ 19.378537] [] ? avc_has_perm_noaudit+0xa2/0x450 [ 19.384913] [] ? avc_has_extended_perms+0xf10/0xf10 [ 19.392939] [] ? security_capable+0x8e/0xc0 [ 19.398879] [] ? ns_capable_common+0xcf/0x160 [ 19.404993] [] ? ns_capable+0x22/0x30 [ 19.410417] [] ? __netlink_ns_capable+0xe1/0x120 [ 19.416791] [] ? rtnl_link_unregister+0x270/0x270 [ 19.423254] [] rtnetlink_rcv_msg+0x4c3/0x640 [ 19.429281] [] ? rtnl_newlink+0x1550/0x1550 [ 19.435219] [] ? rtnetlink_rcv+0x1b/0x40 [ 19.440904] [] ? mutex_lock_killable_nested+0x960/0x960 [ 19.447888] [] netlink_rcv_skb+0x13e/0x370 [ 19.453753] [] ? rtnl_newlink+0x1550/0x1550 [ 19.459695] [] rtnetlink_rcv+0x2a/0x40 [ 19.465212] [] netlink_unicast+0x511/0x750 [ 19.471071] [] ? netlink_unicast+0x43c/0x750 [ 19.477098] [] ? netlink_attachskb+0x680/0x680 [ 19.483299] [] netlink_sendmsg+0x8e8/0xc50 [ 19.489161] [] ? netlink_unicast+0x750/0x750 [ 19.495188] [] ? move_addr_to_kernel.part.12+0xd2/0x120 [ 19.502169] [] ? selinux_socket_sendmsg+0x3f/0x50 [ 19.508630] [] ? security_socket_sendmsg+0x89/0xb0 [ 19.515178] [] ? netlink_unicast+0x750/0x750 [ 19.521205] [] sock_sendmsg+0xca/0x110 [ 19.526709] [] ___sys_sendmsg+0x6d1/0x7e0 [ 19.532475] [] ? copy_msghdr_from_user+0x550/0x550 [ 19.539025] [] ? __lru_cache_add+0x187/0x250 [ 19.545055] [] ? do_huge_pmd_anonymous_page+0xb05/0x10d0 [ 19.552124] [] ? _raw_spin_unlock+0x2c/0x50 [ 19.558062] [] ? do_huge_pmd_anonymous_page+0x2d4/0x10d0 [ 19.565128] [] ? handle_mm_fault+0x6ee/0x2530 [ 19.571254] [] ? __fget_light+0x158/0x1e0 [ 19.577017] [] ? __fdget+0x18/0x20 [ 19.582180] [] ? sockfd_lookup_light+0x118/0x160 [ 19.588553] [] __sys_sendmsg+0xd6/0x190 [ 19.594144] [] ? SyS_shutdown+0x1b0/0x1b0 [ 19.599921] [] ? __do_page_fault+0x5ec/0xd40 [ 19.605952] [] compat_SyS_sendmsg+0x2a/0x40 [ 19.611904] [] ? compat_SyS_getsockopt+0x2a0/0x2a0 [ 19.618454] [] do_fast_syscall_32+0x2f7/0x890 [ 19.624566] [] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 19.631200] [] entry_SYSENTER_compat+0x74/0x83 [ 19.637928] Dumping ftrace buffer: [ 19.641492] (ftrace buffer empty) [ 19.645173] Kernel Offset: disabled [ 19.648778] Rebooting in 86400 seconds..