[....] Starting enhanced syslogd: rsyslogd[ 13.854602] audit: type=1400 audit(1537805583.947:4): avc: denied { syslog } for pid=1926 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 mcstransd: [....] Starting periodic command scheduler: cron[?25l[?1c7[1G[[32m ok [39;49m8[?25h[?0c. [....] 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 '10.128.0.3' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 37.454891] BUG: using __this_cpu_add() in preemptible [00000000] code: syz-executor993/2084 [ 37.463798] caller is __this_cpu_preempt_check+0x1c/0x20 [ 37.469236] CPU: 1 PID: 2084 Comm: syz-executor993 Not tainted 4.4.157+ #101 [ 37.476508] 0000000000000000 6ce1daaf657f7fcc ffff8800b65c7850 ffffffff81a559fd [ 37.484601] 0000000000000001 ffffffff82928b40 ffffffff82a7b760 ffff8801d4115f00 [ 37.492582] 0000000000000001 ffff8800b65c7890 ffffffff81af01fa ffff8800b65c78a0 [ 37.500567] Call Trace: [ 37.503129] [] dump_stack+0xc1/0x124 [ 37.508473] [] check_preemption_disabled.cold.0+0x7f/0x8b [ 37.515642] [] __this_cpu_preempt_check+0x1c/0x20 [ 37.522116] [] tcp_try_coalesce+0x22a/0x4c0 [ 37.528065] [] ? tcp_conn_request+0x1ee0/0x1ee0 [ 37.534364] [] ? skb_copy_datagram_from_iter+0x392/0x5b0 [ 37.541443] [] tcp_queue_rcv+0x127/0x6f0 [ 37.547133] [] tcp_send_rcvq+0x3a6/0x470 [ 37.552821] [] ? tcp_rcv_established+0x1fd0/0x1fd0 [ 37.559380] [] ? do_softirq.part.2+0x10/0x60 [ 37.565500] [] ? trace_hardirqs_on_caller+0x38b/0x590 [ 37.572320] [] ? lock_sock_nested+0x90/0x120 [ 37.578361] [] ? trace_hardirqs_on+0xd/0x10 [ 37.584306] [] ? __local_bh_enable_ip+0x6a/0xd0 [ 37.590596] [] tcp_sendmsg+0x237c/0x2b30 [ 37.596328] [] ? sock_has_perm+0x9f/0x3f0 [ 37.602106] [] ? tcp_sendpage+0x17e0/0x17e0 [ 37.608052] [] ? selinux_msg_queue_alloc_security+0x2e0/0x2e0 [ 37.615558] [] ? debug_lockdep_rcu_enabled+0x77/0x90 [ 37.622296] [] ? debug_lockdep_rcu_enabled+0x77/0x90 [ 37.629042] [] ? check_preemption_disabled+0x3b/0x170 [ 37.635863] [] ? inet_sendmsg+0x143/0x4d0 [ 37.641690] [] inet_sendmsg+0x203/0x4d0 [ 37.647294] [] ? inet_sendmsg+0x73/0x4d0 [ 37.652982] [] ? inet_recvmsg+0x4c0/0x4c0 [ 37.658763] [] sock_sendmsg+0xbb/0x110 [ 37.664281] [] SyS_sendto+0x220/0x370 [ 37.669716] [] ? SyS_getpeername+0x2d0/0x2d0 [ 37.675749] [] ? __local_bh_enable_ip+0x6a/0xd0 [ 37.682105] [] ? inet_stream_connect+0x78/0xa0 [ 37.688376] [] ? SyS_accept+0x30/0x30 [ 37.693820] [] ? tcp_setsockopt+0x8f/0xe0 [ 37.699598] [] ? SyS_setsockopt+0x185/0x260 [ 37