[....] Starting enhanced syslogd: rsyslogd[ 14.167684] audit: type=1400 audit(1564660851.920:4): avc: denied { syslog } for pid=1928 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 '10.128.0.145' (ECDSA) to the list of known hosts. 2019/08/01 12:01:59 parsed 1 programs 2019/08/01 12:02:01 executed programs: 0 2019/08/01 12:02:06 executed programs: 382 2019/08/01 12:02:11 executed programs: 741 2019/08/01 12:02:16 executed programs: 1105 2019/08/01 12:02:21 executed programs: 1478 2019/08/01 12:02:26 executed programs: 1846 2019/08/01 12:02:31 executed programs: 2211 syzkaller login: INIT: Id "1" respawning too fast: disabled for 5 minutes INIT: Id "4" respawning too fast: disabled for 5 minutes INIT: Id "3" respawning too fast: disabled for 5 minutes INIT: Id "2" respawning too fast: disabled for 5 minutes INIT: Id "5" respawning too fast: disabled for 5 minutes INIT: Id "6" respawning too fast: disabled for 5 minutes 2019/08/01 12:02:36 executed programs: 2568 2019/08/01 12:02:41 executed programs: 2947 2019/08/01 12:02:46 executed programs: 3310 [ 128.637805] ------------[ cut here ]------------ [ 128.642609] WARNING: CPU: 0 PID: 14648 at lib/debugobjects.c:260 debug_print_object+0x181/0x210() [ 128.651605] ODEBUG: activate active (active state 1) object type: rcu_head hint: (null) [ 128.660812] Kernel panic - not syncing: panic_on_warn set ... [ 128.660812] [ 128.668167] CPU: 0 PID: 14648 Comm: syz-executor.0 Not tainted 4.4.174+ #4 [ 128.675155] 0000000000000000 eba47b71ee1deddf ffff8801db607298 ffffffff81aad1a1 [ 128.683417] ffff8801db6073e8 ffffffff82835ee0 ffffffff8292c440 0000000000000104 [ 128.691481] ffffffff81b0b3d1 ffff8801db607378 ffffffff813a48c2 0000000041b58ab3 [ 128.699515] Call Trace: [ 128.702086] [] dump_stack+0xc1/0x120 [ 128.708178] [] ? debug_print_object+0x181/0x210 [ 128.714481] [] panic+0x1b9/0x37b [ 128.719474] [] ? add_taint.cold+0x16/0x16 [ 128.725266] [] ? vprintk_emit+0x248/0x820 [ 128.731044] [] ? warn_slowpath_common.cold+0x5/0x20 [ 128.737694] [] warn_slowpath_common.cold+0x20/0x20 [ 128.744261] [] warn_slowpath_fmt+0xbf/0x100 [ 128.750216] [] ? warn_slowpath_common+0x120/0x120 [ 128.756684] [] debug_print_object+0x181/0x210 [ 128.762803] [] debug_object_activate+0x2f0/0x470 [ 128.769183] [] ? debug_object_free+0x350/0x350 [ 128.775403] [] ? debug_object_init_on_stack+0x20/0x20 [ 128.782341] [] ? xfrm_policy_alloc+0x480/0x480 [ 128.788558] [] __call_rcu.constprop.0+0x35/0x930 [ 128.794956] [] call_rcu+0x12/0x20 [ 128.800039] [] xfrm_policy_destroy+0x77/0x90 [ 128.806079] [] __xfrm_policy_check+0x137a/0x1640 [ 128.812462] [] ? __xfrm_policy_check+0x125/0x1640 [ 128.818932] [] ? __xfrm_route_forward+0x460/0x460 [ 128.825404] [] ? __lock_acquire+0xa4f/0x4f50 [ 128.831446] [] udp_queue_rcv_skb+0x8cb/0x14e0 [ 128.837569] [] __udp4_lib_rcv+0x4e3/0x21f0 [ 128.843431] [] udp_rcv+0x22/0x30 [ 128.848439] [] ip_local_deliver_finish+0x3c0/0xa70 [ 128.854996] [] ? ip_local_deliver_finish+0x12a/0xa70 [ 128.861728] [] ip_local_deliver+0x1af/0x390 [ 128.867688] [] ? ip_call_ra_chain+0x540/0x540 [ 128.873824] [] ? inet_del_offload+0x40/0x40 [ 128.879780] [] ? check_preemption_disabled+0x3c/0x200 [ 128.886599] [] ip_rcv_finish+0x768/0x1220 [ 128.892403] [] ? sk_clone_lock+0x1050/0x1050 [ 128.898440] [] ip_rcv+0x8fa/0xe70 [ 128.903539] [] ? ip_local_deliver+0x390/0x390 [ 128.909683] [] ? ip_local_deliver_finish+0xa70/0xa70 [ 128.916418] [] ? ip_local_deliver+0x390/0x390 [ 128.922549] [] __netif_receive_skb_core+0x1300/0x2950 [ 128.929366] [] ? dev_loopback_xmit+0x430/0x430 [ 128.935575] [] ? debug_lockdep_rcu_enabled+0x71/0xa0 [ 128.942575] [] ? debug_lockdep_rcu_enabled+0x71/0xa0 [ 128.949312] [] ? check_preemption_disabled+0x3c/0x200 [ 128.956134] [] __netif_receive_skb+0x58/0x1c0 [ 128.962265] [] process_backlog+0x200/0x630 [ 128.968127] [] ? process_backlog+0x19c/0x630 [ 128.974181] [] ? net_rx_action+0x1fb/0xd30 [ 128.980057] [] net_rx_action+0x367/0xd30 [ 128.985845] [] ? net_rps_action_and_irq_enable.isra.0+0x170/0x170 [ 128.993708] [] __do_softirq+0x226/0xa3f [ 128.999310] [] do_softirq_own_stack+0x1c/0x30 [ 129.005443] [] do_softirq.part.0+0x54/0x60 [ 129.012176] [] do_softirq+0x18/0x20 [ 129.017459] [] netif_rx_ni+0xeb/0x3b0 [ 129.022975] [] tun_get_user+0xdbf/0x2640 [ 129.028679] [] ? tun_free_netdev+0xb0/0xb0 [ 129.034547] [] ? futex_wait+0x47d/0x600 [ 129.040146] [] ? irq_cpu_online+0x1a0/0x230 [ 129.046106] [] ? debug_lockdep_rcu_enabled+0x71/0xa0 [ 129.052843] [] ? __tun_get+0x126/0x230 [ 129.058359] [] tun_chr_write_iter+0xda/0x190 [ 129.064414] [] do_iter_readv_writev+0x141/0x1e0 [ 129.070713] [] ? tun_sendmsg+0x140/0x140 [ 129.076418] [] ? vfs_iter_read+0x280/0x280 [ 129.082297] [] ? rw_verify_area+0x103/0x2f0 [ 129.088264] [] ? tun_sendmsg+0x140/0x140 [ 129.093971] [] do_readv_writev+0x387/0x6e0 [ 129.099836] [] ? vfs_write+0x4e0/0x4e0 [ 129.105350] [] ? debug_lockdep_rcu_enabled+0x71/0xa0 [ 129.112083] [] ? check_preemption_disabled+0x3c/0x200 [ 129.118916] [] ? check_preemption_disabled+0x3c/0x200 [ 129.125737] [] ? __fget+0x13b/0x370 [ 129.130990] [] ? __fget+0x162/0x370 [ 129.136244] [] ? __fget+0x47/0x370 [ 129.141425] [] vfs_writev+0x7d/0xb0 [ 129.146683] [] SyS_writev+0xdc/0x260 [ 129.152047] [] ? SyS_readv+0x260/0x260 [ 129.157570] [] ? lockdep_sys_exit_thunk+0x12/0x14 [ 129.164040] [] entry_SYSCALL_64_fastpath+0x1e/0x9a [ 129.171245] Kernel Offset: disabled [ 129.175223] Rebooting in 86400 seconds..