[....] Starting periodic command scheduler: cron[?25l[?1c7[ ok 8[?25h[?0c.
[....] Starting OpenBSD Secure Shell server: sshd[   19.703285] random: sshd: uninitialized urandom read (32 bytes read)
[?25l[?1c7[ ok 8[?25h[?0c.

Debian GNU/Linux 7 syzkaller ttyS0

syzkaller login: [   22.865464] random: sshd: uninitialized urandom read (32 bytes read)
[   23.230156] random: sshd: uninitialized urandom read (32 bytes read)
[   24.003989] random: sshd: uninitialized urandom read (32 bytes read)
[   24.161568] random: sshd: uninitialized urandom read (32 bytes read)
Warning: Permanently added '10.128.10.30' (ECDSA) to the list of known hosts.
[   29.583655] random: sshd: uninitialized urandom read (32 bytes read)
executing program
executing program
[   29.677087] IPVS: ftp: loaded support on port[0] = 21
[   30.379388] WARNING: CPU: 1 PID: 44 at net/ipv6/xfrm6_tunnel.c:348 xfrm6_tunnel_net_exit+0x2df/0x510
[   30.388777] Kernel panic - not syncing: panic_on_warn set ...
[   30.388777] 
[   30.396139] CPU: 1 PID: 44 Comm: kworker/u4:2 Not tainted 4.17.0-rc4+ #52
[   30.403054] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
[   30.412425] Workqueue: netns cleanup_net
[   30.416479] Call Trace:
[   30.419060]  dump_stack+0x1b9/0x294
[   30.422683]  ? dump_stack_print_info.cold.2+0x52/0x52
[   30.427864]  ? xfrm6_tunnel_net_exit+0x2b0/0x510
[   30.432607]  panic+0x22f/0x4de
[   30.435817]  ? add_taint.cold.5+0x16/0x16
[   30.439976]  ? __warn.cold.8+0x148/0x1b3
[   30.444025]  ? __warn.cold.8+0x117/0x1b3
[   30.448097]  ? xfrm6_tunnel_net_exit+0x2df/0x510
[   30.452838]  __warn.cold.8+0x163/0x1b3
[   30.456723]  ? xfrm6_tunnel_net_exit+0x2df/0x510
[   30.461464]  report_bug+0x252/0x2d0
[   30.465083]  do_error_trap+0x1de/0x490
[   30.468955]  ? math_error+0x420/0x420
[   30.472744]  ? insert_work+0x4e0/0x4e0
[   30.476627]  ? trace_hardirqs_on+0xd/0x10
[   30.480760]  ? __local_bh_enable_ip+0x161/0x230
[   30.485420]  ? __sanitizer_cov_trace_const_cmp1+0x1a/0x20
[   30.491046]  ? trace_hardirqs_off_thunk+0x1a/0x1c
[   30.495916]  do_invalid_op+0x1b/0x20
[   30.499619]  invalid_op+0x14/0x20
[   30.503067] RIP: 0010:xfrm6_tunnel_net_exit+0x2df/0x510
[   30.508423] RSP: 0018:ffff8801d95273d8 EFLAGS: 00010293
[   30.513771] RAX: ffff8801d955c380 RBX: ffff8801b03399f8 RCX: ffffffff86925525
[   30.521031] RDX: 0000000000000000 RSI: ffffffff8692552f RDI: 0000000000000007
[   30.528288] RBP: ffff8801d95274f8 R08: ffff8801d955c380 R09: 0000000000000006
[   30.535559] R10: ffff8801d955c380 R11: 0000000000000000 R12: 00000000000000ff
[   30.542835] R13: ffffed003b2a4e82 R14: ffff8801d95274d0 R15: ffff8801b3e25780
[   30.550109]  ? xfrm6_tunnel_net_exit+0x2d5/0x510
[   30.554851]  ? xfrm6_tunnel_net_exit+0x2df/0x510
[   30.559598]  ? xfrm6_tunnel_net_exit+0x2df/0x510
[   30.564349]  ? xfrm6_tunnel_alloc_spi+0xe20/0xe20
[   30.569191]  ? xt_proto_fini+0x279/0x330
[   30.573240]  ? xt_proto_init+0x840/0x840
[   30.577298]  ? __sanitizer_cov_trace_const_cmp4+0x16/0x20
[   30.582824]  ? tcp_can_early_drop+0x60/0x60
[   30.587131]  ? nf_ct_l4proto_pernet_unregister_one+0x93/0xf0
[   30.592935]  ? __sanitizer_cov_trace_const_cmp4+0x16/0x20
[   30.598459]  ? ip6t_unregister_table+0x70/0x70
[   30.603043]  ? xfrm6_tunnel_alloc_spi+0xe20/0xe20
[   30.607907]  ops_exit_list.isra.7+0xb0/0x160
[   30.612307]  cleanup_net+0x51d/0xb20
[   30.616010]  ? lock_downgrade+0x8e0/0x8e0
[   30.620155]  ? peernet2id_alloc+0x3e0/0x3e0
[   30.624462]  ? find_held_lock+0x36/0x1c0
[   30.628519]  ? graph_lock+0x170/0x170
[   30.632317]  ? lock_acquire+0x1dc/0x520
[   30.636282]  ? process_one_work+0xb46/0x1b50
[   30.640682]  ? __lock_is_held+0xb5/0x140
[   30.644734]  process_one_work+0xc1e/0x1b50
[   30.648956]  ? finish_task_switch+0x28b/0x810
[   30.653441]  ? pwq_dec_nr_in_flight+0x490/0x490
[   30.658107]  ? __schedule+0x809/0x1e30
[   30.661984]  ? pick_next_task_fair+0x973/0x1660
[   30.666644]  ? graph_lock+0x170/0x170
[   30.670440]  ? graph_lock+0x170/0x170
[   30.674228]  ? find_held_lock+0x36/0x1c0
[   30.678277]  ? find_held_lock+0x36/0x1c0
[   30.682329]  ? lock_acquire+0x1dc/0x520
[   30.686287]  ? worker_thread+0x41f/0x1440
[   30.690421]  ? lock_downgrade+0x8e0/0x8e0
[   30.694567]  ? lock_release+0xa10/0xa10
[   30.698532]  ? kasan_check_read+0x11/0x20
[   30.702684]  ? do_raw_spin_trylock+0x1b0/0x1b0
[   30.707383]  worker_thread+0x1cc/0x1440
[   30.711381]  ? process_one_work+0x1b50/0x1b50
[   30.715874]  ? graph_lock+0x170/0x170
[   30.719664]  ? find_held_lock+0x36/0x1c0
[   30.723717]  ? __schedule+0x1e30/0x1e30
[   30.727674]  ? retint_kernel+0x10/0x10
[   30.731553]  ? __sanitizer_cov_trace_const_cmp8+0x18/0x20
[   30.737078]  ? __kthread_parkme+0x1b7/0x280
[   30.741385]  kthread+0x345/0x410
[   30.744750]  ? process_one_work+0x1b50/0x1b50
[   30.749228]  ? kthread_bind+0x40/0x40
[   30.753025]  ret_from_fork+0x3a/0x50
[   30.757612] Dumping ftrace buffer:
[   30.761301]    (ftrace buffer empty)
[   30.764990] Kernel Offset: disabled
[   30.768598] Rebooting in 86400 seconds..