[....] Starting file context maintaining daemon: restorecond[?25l[?1c7[ ok 8[?25h[?0c.
[....] Starting OpenBSD Secure Shell server: sshd[   32.362873] random: sshd: uninitialized urandom read (32 bytes read)
[?25l[?1c7[ ok 8[?25h[?0c.
[   32.666011] random: sshd: uninitialized urandom read (32 bytes read)
[   32.974784] random: sshd: uninitialized urandom read (32 bytes read)

Debian GNU/Linux 7 syzkaller ttyS0

syzkaller login: [   34.597425] random: sshd: uninitialized urandom read (32 bytes read)
[   34.771055] random: sshd: uninitialized urandom read (32 bytes read)
Warning: Permanently added '10.128.0.234' (ECDSA) to the list of known hosts.
[   40.476217] random: sshd: uninitialized urandom read (32 bytes read)
[   40.591381] kauditd_printk_skb: 10 callbacks suppressed
[   40.591388] audit: type=1400 audit(1571814515.259:36): avc:  denied  { map } for  pid=6955 comm="syz-executor706" path="/root/syz-executor706321614" dev="sda1" ino=16482 scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=unconfined_u:object_r:user_home_t:s0 tclass=file permissive=1
[   40.891142] IPVS: ftp: loaded support on port[0] = 21
executing program
[   41.687132] BUG: sleeping function called from invalid context at kernel/workqueue.c:2816
[   41.695674] in_atomic(): 1, irqs_disabled(): 0, pid: 6959, name: syz-executor706
[   41.703217] 2 locks held by syz-executor706/6959:
[   41.708110]  #0:  (rtnl_mutex){+.+.}, at: [<ffffffff84d9103a>] rtnetlink_rcv_msg+0x33a/0xb70
[   41.716729]  #1:  (&qdisc_rx_lock){+...}, at: [<ffffffff84ea378e>] red_change+0x32e/0x1030
[   41.725185] Preemption disabled at:
[   41.725195] [<ffffffff84ea378e>] red_change+0x32e/0x1030
[   41.734459] CPU: 0 PID: 6959 Comm: syz-executor706 Not tainted 4.14.150 #0
[   41.741465] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
[   41.750797] Call Trace:
[   41.753366]  dump_stack+0x138/0x197
[   41.756974]  ? red_change+0x32e/0x1030
[   41.760843]  ___might_sleep.cold+0x1bd/0x1f6
[   41.765229]  __might_sleep+0x93/0xb0
[   41.768928]  flush_work+0xdb/0x730
[   41.772446]  ? kasan_slab_free+0x75/0xc0
[   41.776481]  ? kfree+0xcc/0x270
[   41.779740]  ? fifo_create_dflt+0x84/0xd0
[   41.783863]  ? insert_work+0x320/0x320
[   41.787726]  ? netlink_rcv_skb+0x14f/0x3c0
[   41.792008]  ? __lock_acquire+0x5f7/0x4620
[   41.796264]  ? do_syscall_64+0x1e8/0x640
[   41.800308]  ? entry_SYSCALL_64_after_hwframe+0x42/0xb7
[   41.805656]  ? mark_held_locks+0xb1/0x100
[   41.809790]  ? __cancel_work_timer+0x166/0x480
[   41.814357]  __cancel_work_timer+0x2f0/0x480
[   41.818748]  ? cancel_delayed_work+0x20/0x20
[   41.823144]  ? __hrtimer_run_queues+0xbc0/0xbc0
[   41.827789]  ? save_trace+0x290/0x290
[   41.831567]  ? mark_held_locks+0xb1/0x100
[   41.835691]  ? quarantine_put+0xfa/0x1a0
[   41.839733]  ? htb_destroy_class.isra.0+0xf0/0xf0
[   41.844557]  cancel_work_sync+0x18/0x20
[   41.848518]  htb_destroy+0x26/0x420
[   41.852485]  ? htb_destroy_class.isra.0+0xf0/0xf0
[   41.857305]  qdisc_destroy+0x157/0x320
[   41.861170]  red_change+0x4d4/0x1030
[   41.865394]  ? red_graft+0x240/0x240
[   41.869099]  ? nla_strcmp+0xb9/0x100
[   41.872811]  ? lockdep_rtnl_is_held+0x1a/0x30
[   41.877292]  ? red_graft+0x240/0x240
[   41.880998]  tc_modify_qdisc+0xc5a/0x1270
[   41.885126]  ? qdisc_create+0xe60/0xe60
[   41.889357]  ? rtnetlink_rcv_msg+0x305/0xb70
[   41.893746]  ? qdisc_create+0xe60/0xe60
[   41.897698]  rtnetlink_rcv_msg+0x3eb/0xb70
[   41.901926]  ? rtnl_bridge_getlink+0x7a0/0x7a0
[   41.906485]  ? netlink_deliver_tap+0x93/0x8f0
[   41.910968]  netlink_rcv_skb+0x14f/0x3c0
[   41.915005]  ? rtnl_bridge_getlink+0x7a0/0x7a0
[   41.919564]  ? lock_downgrade+0x740/0x740
[   41.923689]  ? netlink_ack+0x9a0/0x9a0
[   41.927553]  ? netlink_deliver_tap+0xba/0x8f0
[   41.932029]  rtnetlink_rcv+0x1d/0x30
[   41.935720]  netlink_unicast+0x45d/0x640
[   41.939755]  ? netlink_attachskb+0x6a0/0x6a0
[   41.944147]  ? security_netlink_send+0x81/0xb0
[   41.948706]  netlink_sendmsg+0x7c4/0xc60
[   41.952747]  ? netlink_unicast+0x640/0x640
[   41.956969]  ? security_socket_sendmsg+0x89/0xb0
[   41.961701]  ? netlink_unicast+0x640/0x640
[   41.965921]  sock_sendmsg+0xce/0x110
[   41.969613]  ___sys_sendmsg+0x70a/0x840
[   41.973562]  ? copy_msghdr_from_user+0x3f0/0x3f0
[   41.978305]  ? __fget+0x210/0x370
[   41.981747]  ? find_held_lock+0x35/0x130
[   41.985795]  ? __fget+0x210/0x370
[   41.989227]  ? lock_downgrade+0x740/0x740
[   41.993353]  ? __fget+0x237/0x370
[   41.996784]  ? __fget_light+0x172/0x1f0
[   42.000736]  ? __fdget+0x1b/0x20
[   42.004087]  ? sockfd_lookup_light+0xb4/0x160
[   42.008562]  __sys_sendmsg+0xb9/0x140
[   42.012339]  ? SyS_shutdown+0x170/0x170
[   42.016307]  SyS_sendmsg+0x2d/0x50
[   42.019834]  ? __sys_sendmsg+0x140/0x140
[   42.023874]  do_syscall_64+0x1e8/0x640
[   42.027738]  ? trace_hardirqs_off_thunk+0x1a/0x1c
[   42.032572]  entry_SYSCALL_64_after_hwframe+0x42/0xb7
[   42.037737] RIP: 0033:0x4463a9
[   42.040904] RSP: 002b:00007fe3e79fcd98 EFLAGS: 00000246 ORIG_RAX: 000000000000002e
[   42.048591] RAX: ffffffffffffffda RBX: 00000000006dbc68 RCX: 00000000004463a9
[   42.055846] RDX: 0000000000000000 RSI: 0000000020000240 RDI: 0000000000000004
[   42.063092] RBP: 00000000006dbc60 R08: 00007fe3e79fd700 R09: 0000000000000000
[   42.070351] R10: 00007fe3e79fd700 R11: 0000000000000246 R12: 00000000006dbc6c
[   42.077598] R13: 0000000000000000 R14: 0000000000000000 R15: 0507002400000148