[....] Starting enhanced syslogd: rsyslogd[ 13.301945] audit: type=1400 audit(1541232861.400:4): 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[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 '10.128.0.87' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 55.418033] BUG: using __this_cpu_add() in preemptible [00000000] code: syz-executor142/2098 [ 55.426654] caller is __this_cpu_preempt_check+0x1c/0x20 [ 55.432245] CPU: 0 PID: 2098 Comm: syz-executor142 Not tainted 4.4.162+ #7 [ 55.439244] 0000000000000000 17525ac7b6c0d862 ffff8801d3b176e0 ffffffff81a994bd [ 55.447251] 0000000000000000 ffffffff82929a00 ffffffff82a7c6e0 ffff8800b71e8000 [ 55.455240] 0000000000000002 ffff8801d3b17720 ffffffff81b34f7a ffff8801d3b17730 [ 55.463288] Call Trace: [ 55.465853] [] dump_stack+0xc1/0x124 [ 55.471191] [] check_preemption_disabled.cold.0+0x7f/0x8b [ 55.478355] [] __this_cpu_preempt_check+0x1c/0x20 [ 55.484824] [] tcp_try_coalesce+0x22a/0x4c0 [ 55.490769] [] ? tcp_prune_ofo_queue.part.19+0x450/0x450 [ 55.497844] [] ? skb_copy_datagram_from_iter+0x392/0x5b0 [ 55.504921] [] tcp_queue_rcv+0x127/0x6f0 [ 55.510648] [] tcp_send_rcvq+0x3a6/0x470 [ 55.516340] [] ? tcp_rcv_established+0x1fd0/0x1fd0 [ 55.522930] [] ? tasklet_kill+0x90/0xc0 [ 55.528535] [] ? trace_hardirqs_on_caller+0x38b/0x590 [ 55.535353] [] ? lock_sock_nested+0x90/0x120 [ 55.541388] [] ? trace_hardirqs_on+0xd/0x10 [ 55.547362] [] ? __local_bh_enable_ip+0x6a/0xd0 [ 55.553659] [] tcp_sendmsg+0x237c/0x2b30 [ 55.559347] [] ? sock_has_perm+0x9f/0x3f0 [ 55.565119] [] ? tcp_sendpage+0x17e0/0x17e0 [ 55.571065] [] ? selinux_msg_queue_alloc_security+0x2e0/0x2e0 [ 55.578572] [] ? debug_lockdep_rcu_enabled+0x77/0x90 [ 55.585315] [] ? check_preemption_disabled+0x3b/0x170 [ 55.592146] [] ? inet_sendmsg+0x143/0x4d0 [ 55.597930] [] inet_sendmsg+0x203/0x4d0 [ 55.603533] [] ? inet_sendmsg+0x73/0x4d0 [ 55.609223] [] ? inet_recvmsg+0x4c0/0x4c0 [ 55.615025] [] sock_sendmsg+0xbb/0x110 [ 55.620551] [] sock_write_iter+0x223/0x3b0 [ 55.626415] [] ? sock_sendmsg+0x110/0x110 [ 55.632194] [] ? inode_has_perm.isra.20+0x10c/0x160 [ 55.638838] [] ? iov_iter_init+0xaf/0x1d0 [ 55.644619] [] __vfs_write+0x304/0x3e0 [ 55.650135] [] ? __vfs_read+0x3d0/0x3d0 [ 55.655739] [] ? selinux_file_permission+0x2f2/0x450 [ 55.662499] [] ? rw_verify_area+0x100/0x2f0 [ 55.66