[   20.661969] random: sshd: uninitialized urandom read (32 bytes read, 35 bits of entropy available)
[....] Starting OpenBSD Secure Shell server: sshd[?25l[?1c7[ ok 8[?25h[?0c.
[....] Starting file context maintaining daemon: restorecond[?25l[?1c7[ ok 8[?25h[?0c.

Debian GNU/Linux 7 syzkaller ttyS0

syzkaller login: [   25.309654] random: sshd: uninitialized urandom read (32 bytes read, 40 bits of entropy available)
[   25.733630] random: sshd: uninitialized urandom read (32 bytes read, 42 bits of entropy available)
[   26.650154] random: sshd: uninitialized urandom read (32 bytes read, 100 bits of entropy available)
[   26.808665] random: sshd: uninitialized urandom read (32 bytes read, 104 bits of entropy available)
Warning: Permanently added '10.128.0.10' (ECDSA) to the list of known hosts.
[   32.208666] random: sshd: uninitialized urandom read (32 bytes read, 108 bits of entropy available)
2018/03/24 08:14:07 parsed 1 programs
2018/03/24 08:14:07 executed programs: 0
[   32.582804] IPVS: Creating netns size=2552 id=1
[   32.630302] IPVS: Creating netns size=2552 id=2
[   32.674499] IPVS: Creating netns size=2552 id=3
[   32.755887] IPVS: Creating netns size=2552 id=4
[   32.841875] IPVS: Creating netns size=2552 id=5
[   32.948514] IPVS: Creating netns size=2552 id=6
[   33.093627] IPVS: Creating netns size=2552 id=7
[   33.215573] IPVS: Creating netns size=2552 id=8
2018/03/24 08:14:12 executed programs: 64
[   41.289019] BUG: using __this_cpu_add() in preemptible [00000000] code: syz-executor4/6556
[   41.297490] caller is __this_cpu_preempt_check+0x1c/0x20
[   41.302940] CPU: 1 PID: 6556 Comm: syz-executor4 Not tainted 4.4.120-gd63fdf6 #29
[   41.310547] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
[   41.319887]  0000000000000000 087e448872f656e8 ffff8801c5a275b8 ffffffff81d0408d
[   41.327930]  0000000000000001 ffffffff839fe5a0 ffffffff83cefc20 ffff8800b3133000
[   41.335967]  0000000000000003 ffff8801c5a275f8 ffffffff81d63fe4 ffffffff810002b8
[   41.343968] Call Trace:
[   41.346543]  [<ffffffff81d0408d>] dump_stack+0xc1/0x124
[   41.351898]  [<ffffffff81d63fe4>] check_preemption_disabled+0x1d4/0x200
[   41.358633]  [<ffffffff810002b8>] ? 0xffffffff810002b8
[   41.363901]  [<ffffffff81d6404c>] __this_cpu_preempt_check+0x1c/0x20
[   41.370387]  [<ffffffff8312b439>] tcp_try_coalesce+0x249/0x4d0
[   41.376345]  [<ffffffff8312b1f0>] ? tcp_parse_options+0x970/0x970
[   41.382564]  [<ffffffff82e217fc>] ? skb_copy_datagram_from_iter+0x38c/0x5a0
[   41.389649]  [<ffffffff831335b7>] tcp_queue_rcv+0x127/0x720
[   41.395349]  [<ffffffff8314ae8b>] tcp_send_rcvq+0x39b/0x450
[   41.401046]  [<ffffffff8314aaf0>] ? tcp_rcv_established+0x2230/0x2230
[   41.407615]  [<ffffffff8113bd00>] ? __local_bh_enable_ip+0x30/0xd0
[   41.413922]  [<ffffffff81236bdb>] ? trace_hardirqs_on_caller+0x38b/0x590
[   41.420757]  [<ffffffff82df4330>] ? lock_sock_nested+0x90/0x120
[   41.426847]  [<ffffffff81236ded>] ? trace_hardirqs_on+0xd/0x10
[   41.432821]  [<ffffffff8113bd3a>] ? __local_bh_enable_ip+0x6a/0xd0
[   41.439133]  [<ffffffff831220ef>] tcp_sendmsg+0x1e8f/0x2b10
[   41.444830]  [<ffffffff81237410>] ? debug_check_no_locks_freed+0x2c0/0x2c0
[   41.451832]  [<ffffffff81b68701>] ? sock_has_perm+0x1c1/0x400
[   41.457707]  [<ffffffff83120260>] ? tcp_sendpage+0x1830/0x1830
[   41.463700]  [<ffffffff831d7c91>] ? inet_sendmsg+0x201/0x4c0
[   41.469484]  [<ffffffff831d7d4c>] inet_sendmsg+0x2bc/0x4c0
[   41.475097]  [<ffffffff831d7b03>] ? inet_sendmsg+0x73/0x4c0
[   41.480796]  [<ffffffff831d7a90>] ? inet_recvmsg+0x4c0/0x4c0
[   41.486579]  [<ffffffff82deba6a>] sock_sendmsg+0xca/0x110
[   41.492104]  [<ffffffff82debcd6>] sock_write_iter+0x226/0x3b0
[   41.498076]  [<ffffffff82debab0>] ? sock_sendmsg+0x110/0x110
[   41.503850]  [<ffffffff8161b58d>] ? compat_rw_copy_check_uvector+0x25d/0x340
[   41.511019]  [<ffffffff8151e0b8>] do_iter_readv_writev+0x138/0x1e0
[   41.517325]  [<ffffffff82debab0>] ? sock_sendmsg+0x110/0x110
[   41.523107]  [<ffffffff8151df80>] ? vfs_iter_read+0x270/0x270
[   41.528976]  [<ffffffff8151eac0>] ? rw_verify_area+0x100/0x2f0
[   41.534925]  [<ffffffff82debab0>] ? sock_sendmsg+0x110/0x110
[   41.540693]  [<ffffffff81520094>] compat_do_readv_writev+0x2d4/0x6e0
[   41.547153]  [<ffffffff8151fdc0>] ? vfs_writev+0xb0/0xb0
[   41.552573]  [<ffffffff812e07e0>] ? exit_robust_list+0x240/0x240
[   41.558687]  [<ffffffff82dec6f0>] ? SYSC_connect+0x310/0x310
[   41.564455]  [<ffffffff815786d3>] ? __fget+0x213/0x3b0
[   41.569700]  [<ffffffff815786fa>] ? __fget+0x23a/0x3b0
[   41.574945]  [<ffffffff81578507>] ? __fget+0x47/0x3b0
[   41.580111]  [<ffffffff815207ac>] compat_writev+0xdc/0x150
[   41.585737]  [<ffffffff81522b28>] compat_SyS_writev+0xd8/0x1b0
[   41.591676]  [<ffffffff81522a50>] ? compat_SyS_preadv+0x50/0x50
[   41.597704]  [<ffffffff81006b47>] ? do_fast_syscall_32+0xd7/0x8a0
[   41.603908]  [<ffffffff81522a50>] ? compat_SyS_preadv+0x50/0x50
[   41.609936]  [<ffffffff81006d91>] do_fast_syscall_32+0x321/0x8a0
[   41.616050]  [<ffffffff837752ea>] sysenter_flags_fixed+0xd/0x17
2018/03/24 08:14:17 executed programs: 596