[....] Starting enhanced syslogd: rsyslogd[ 13.647587] audit: type=1400 audit(1537806596.791:4): avc: denied { syslog } for pid=1919 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 '10.128.0.75' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 40.584385] BUG: using __this_cpu_add() in preemptible [00000000] code: syz-executor866/2077 [ 40.593030] caller is __this_cpu_preempt_check+0x1c/0x20 [ 40.598482] CPU: 0 PID: 2077 Comm: syz-executor866 Not tainted 4.4.157+ #37 [ 40.605560] 0000000000000000 226a55b35cb50a90 ffff8801d420f7d8 ffffffff81a559fd [ 40.613551] 0000000000000000 ffffffff82928b40 ffffffff82a7b760 ffff8800b72a4740 [ 40.621538] 0000000000000002 ffff8801d420f818 ffffffff81af01fa ffff8801d420f828 [ 40.629529] Call Trace: [ 40.632091] [] dump_stack+0xc1/0x124 [ 40.637443] [] check_preemption_disabled.cold.0+0x7f/0x8b [ 40.644675] [] __this_cpu_preempt_check+0x1c/0x20 [ 40.651150] [] tcp_try_coalesce+0x22a/0x4c0 [ 40.657094] [] ? tcp_conn_request+0x1ee0/0x1ee0 [ 40.663395] [] ? skb_copy_datagram_from_iter+0x392/0x5b0 [ 40.670470] [] tcp_queue_rcv+0x127/0x6f0 [ 40.676162] [] tcp_send_rcvq+0x3a6/0x470 [ 40.681845] [] ? tcp_rcv_established+0x1fd0/0x1fd0 [ 40.688405] [] ? do_softirq.part.2+0x10/0x60 [ 40.694447] [] ? trace_hardirqs_on_caller+0x38b/0x590 [ 40.701266] [] ? lock_sock_nested+0x90/0x120 [ 40.707306] [] ? trace_hardirqs_on+0xd/0x10 [ 40.713253] [] ? __local_bh_enable_ip+0x6a/0xd0 [ 40.719650] [] tcp_sendmsg+0x237c/0x2b30 [ 40.725459] [] ? trace_hardirqs_on+0x10/0x10 [ 40.731590] [] ? sock_has_perm+0x9f/0x3f0 [ 40.737369] [] ? tcp_sendpage+0x17e0/0x17e0 [ 40.743339] [] ? selinux_msg_queue_alloc_security+0x2e0/0x2e0 [ 40.750852] [] ? debug_lockdep_rcu_enabled+0x77/0x90 [ 40.757583] [] ? check_preemption_disabled+0x3b/0x170 [ 40.764458] [] ? inet_sendmsg+0x143/0x4d0 [ 40.770237] [] inet_sendmsg+0x203/0x4d0 [ 40.775839] [] ? inet_sendmsg+0x73/0x4d0 [ 40.781536] [] ? inet_recvmsg+0x4c0/0x4c0 [ 40.787317] [] sock_sendmsg+0xbb/0x110 [ 40.792843] [] SyS_sendto+0x220/0x370 [ 40.798269] [] ? SyS_getpeername+0x2d0/0x2d0 [ 40.804385] [] ? __local_bh_enable_ip+0x6a/0xd0 [ 40.810692] [] ? inet_stream_connect+0x78/0xa0 [ 40.816916] [] ? SyS_accept+0x30/0x30 [ 40.822476] [] ? fput+0x20/0x150 [ 40.827476] [] ? compat_SyS_setsockopt+0x1aa/0x6e0 [ 40.834034] [