[   12.926246] audit: type=1400 audit(1541234828.996:4): 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
[....] Starting enhanced syslogd: rsyslogd[?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 '10.128.0.91' (ECDSA) to the list of known hosts.
executing program
syzkaller login: [   50.092788] BUG: using __this_cpu_add() in preemptible [00000000] code: syz-executor128/2084
[   50.101837] caller is __this_cpu_preempt_check+0x1c/0x20
[   50.107319] CPU: 0 PID: 2084 Comm: syz-executor128 Not tainted 4.4.162+ #117
[   50.114488]  0000000000000000 a04f9d96b7233b9c ffff8800b221f758 ffffffff81a994bd
[   50.122590]  0000000000000000 ffffffff82929a00 ffffffff82a7c6e0 ffff8801d4008000
[   50.130657]  0000000000000002 ffff8800b221f798 ffffffff81b34f7a ffff8800b221f7a8
[   50.138735] Call Trace:
[   50.141325]  [<ffffffff81a994bd>] dump_stack+0xc1/0x124
[   50.146676]  [<ffffffff81b34f7a>] check_preemption_disabled.cold.0+0x7f/0x8b
[   50.153843]  [<ffffffff81af769c>] __this_cpu_preempt_check+0x1c/0x20
[   50.160315]  [<ffffffff823fd80a>] tcp_try_coalesce+0x22a/0x4c0
[   50.166284]  [<ffffffff823fd5e0>] ? tcp_prune_ofo_queue.part.19+0x450/0x450
[   50.173371]  [<ffffffff821f9692>] ? skb_copy_datagram_from_iter+0x392/0x5b0
[   50.180454]  [<ffffffff823fdbc7>] tcp_queue_rcv+0x127/0x6f0
[   50.186151]  [<ffffffff82411ec6>] tcp_send_rcvq+0x3a6/0x470
[   50.191842]  [<ffffffff82411b20>] ? tcp_rcv_established+0x1fd0/0x1fd0
[   50.198404]  [<ffffffff810e1a00>] ? tasklet_kill+0x90/0xc0
[   50.204006]  [<ffffffff811fb07b>] ? trace_hardirqs_on_caller+0x38b/0x590
[   50.210830]  [<ffffffff821d03d0>] ? lock_sock_nested+0x90/0x120
[   50.216873]  [<ffffffff811fb28d>] ? trace_hardirqs_on+0xd/0x10
[   50.222838]  [<ffffffff810e1afa>] ? __local_bh_enable_ip+0x6a/0xd0
[   50.229162]  [<ffffffff823ea6dc>] tcp_sendmsg+0x237c/0x2b30
[   50.234874]  [<ffffffff811fb290>] ? trace_hardirqs_on+0x10/0x10
[   50.240921]  [<ffffffff8194a96f>] ? sock_has_perm+0x9f/0x3f0
[   50.246696]  [<ffffffff823e8360>] ? tcp_sendpage+0x17e0/0x17e0
[   50.252675]  [<ffffffff8194a8d0>] ? selinux_msg_queue_alloc_security+0x2e0/0x2e0
[   50.260295]  [<ffffffff81237767>] ? debug_lockdep_rcu_enabled+0x77/0x90
[   50.267348]  [<ffffffff81af752b>] ? check_preemption_disabled+0x3b/0x170
[   50.274245]  [<ffffffff824963d3>] ? inet_sendmsg+0x143/0x4d0
[   50.280131]  [<ffffffff82496493>] inet_sendmsg+0x203/0x4d0
[   50.285727]  [<ffffffff82496303>] ? inet_sendmsg+0x73/0x4d0
[   50.291425]  [<ffffffff82496290>] ? inet_recvmsg+0x4c0/0x4c0
[   50.297209]  [<ffffffff821c376b>] sock_sendmsg+0xbb/0x110
[   50.302727]  [<ffffffff821c39e3>] sock_write_iter+0x223/0x3b0
[   50.308590]  [<ffffffff821c37c0>] ? sock_sendmsg+0x110/0x110
[   50.314374]  [<ffffffff81955b9c>] ? inode_has_perm.isra.20+0x10c/0x160
[   50.321019]  [<ffffffff81ad489f>] ? iov_iter_init+0xaf/0x1d0
[   50.326798]  [<ffffffff81490e04>] __vfs_write+0x304/0x3e0
[   50.332326]  [<ffffffff81490b00>] ? __vfs_read+0x3d0/0x3d0
[   50.337927]  [<ffffffff81956fe2>] ? selinux_file_permission+0x2f2/