[....] Starting OpenBSD Secure Shell server: sshd[ 20.419200] random: sshd: uninitialized urandom read (32 bytes read) [?25l[?1c7[ ok 8[?25h[?0c. Debian GNU/Linux 7 syzkaller ttyS0 syzkaller login: [ 24.421941] random: sshd: uninitialized urandom read (32 bytes read) [ 24.670770] random: sshd: uninitialized urandom read (32 bytes read) [ 25.571151] sshd (4536) used greatest stack depth: 17176 bytes left [ 25.587693] random: sshd: uninitialized urandom read (32 bytes read) [ 25.749626] random: sshd: uninitialized urandom read (32 bytes read) Warning: Permanently added '10.128.10.30' (ECDSA) to the list of known hosts. [ 31.154452] random: sshd: uninitialized urandom read (32 bytes read) 2018/07/23 22:18:35 parsed 1 programs [ 33.350820] random: cc1: uninitialized urandom read (8 bytes read) 2018/07/23 22:18:38 executed programs: 0 [ 34.707223] IPVS: ftp: loaded support on port[0] = 21 [ 34.898896] kasan: CONFIG_KASAN_INLINE enabled [ 34.903811] kasan: GPF could be caused by NULL-ptr deref or user memory access [ 34.911293] general protection fault: 0000 [#1] SMP KASAN [ 34.916843] CPU: 0 PID: 4594 Comm: kworker/0:4 Not tainted 4.18.0-rc6+ #63 [ 34.923881] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 34.933275] Workqueue: events smc_tcp_listen_work [ 34.938145] RIP: 0010:kernel_accept+0x5a/0x310 [ 34.942732] Code: 48 c1 ea 03 80 3c 02 00 0f 85 4a 02 00 00 48 b8 00 00 00 00 00 fc ff df 49 8b 5d 20 48 8d bb 48 03 00 00 48 89 fa 48 c1 ea 03 <0f> b6 04 02 84 c0 74 08 3c 03 0f 8e 14 02 00 00 48 8d 7b 10 0f b6 [ 34.962235] RSP: 0018:ffff8801d84b75a8 EFLAGS: 00010206 [ 34.967608] RAX: dffffc0000000000 RBX: 0000000000000000 RCX: 0000000000000000 [ 34.974893] RDX: 0000000000000069 RSI: ffffffff85edda6f RDI: 0000000000000348 [ 34.982354] RBP: ffff8801d84b75d8 R08: ffff8801ac9a2978 R09: 0000000000000006 [ 34.990414] R10: ffff8801ac9a2140 R11: 0000000000000000 R12: ffff8801d84b7688 [ 34.997690] R13: ffff8801a83b2480 R14: 0000000000000000 R15: ffff8801d84b7708 [ 35.004965] FS: 0000000000000000(0000) GS:ffff8801dae00000(0000) knlGS:0000000000000000 [ 35.013199] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 35.019182] CR2: 0000000020000040 CR3: 0000000008e6a000 CR4: 00000000001406f0 [ 35.026460] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 35.033736] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 35.041005] Call Trace: [ 35.043622] smc_tcp_listen_work+0x222/0xef0 [ 35.048158] ? smc_link_save_peer_info+0x320/0x320 [ 35.053208] ? __lock_is_held+0xb5/0x140 [ 35.057287] process_one_work+0xc73/0x1ba0 [ 35.061537] ? trace_hardirqs_on+0x10/0x10 [ 35.065792] ? pwq_dec_nr_in_flight+0x4a0/0x4a0 [ 35.070478] ? lock_repin_lock+0x430/0x430 [ 35.074736] ? __sched_text_start+0x8/0x8 [ 35.078917] ? lock_downgrade+0x8f0/0x8f0 [ 35.083089] ? graph_lock+0x170/0x170 [ 35.087077] ? graph_lock+0x170/0x170 [ 35.090924] ? lock_acquire+0x1e4/0x540 [ 35.094928] ? worker_thread+0x3dc/0x13c0 [ 35.099101] ? lock_downgrade+0x8f0/0x8f0 [ 35.103259] ? lock_release+0xa30/0xa30 [ 35.107248] ? kasan_check_read+0x11/0x20 [ 35.111405] ? do_raw_spin_unlock+0xa7/0x2f0 [ 35.115835] ? do_raw_spin_trylock+0x1c0/0x1c0 [ 35.120448] ? kasan_check_write+0x14/0x20 [ 35.124720] ? do_raw_spin_lock+0xc1/0x200 [ 35.128971] worker_thread+0x189/0x13c0 [ 35.132964] ? process_one_work+0x1ba0/0x1ba0 [ 35.137470] ? graph_lock+0x170/0x170 [ 35.141369] ? __sched_text_start+0x8/0x8 [ 35.145812] ? graph_lock+0x170/0x170 [ 35.149624] ? find_held_lock+0x36/0x1c0 [ 35.153706] ? find_held_lock+0x36/0x1c0 [ 35.157783] ? lock_downgrade+0x8f0/0x8f0 [ 35.162040] ? kasan_check_read+0x11/0x20 [ 35.166203] ? do_raw_spin_unlock+0xa7/0x2f0 [ 35.170626] ? do_raw_spin_trylock+0x1c0/0x1c0 [ 35.175238] ? _raw_spin_unlock_irqrestore+0x74/0xc0 [ 35.180360] ? __kthread_parkme+0x58/0x1b0 [ 35.184787] ? trace_hardirqs_on_caller+0x421/0x5c0 [ 35.189927] ? trace_hardirqs_on+0xd/0x10 [ 35.194113] ? __sanitizer_cov_trace_const_cmp8+0x18/0x20 [ 35.199671] ? __kthread_parkme+0x106/0x1b0 [ 35.204002] kthread+0x345/0x410 [ 35.207401] ? process_one_work+0x1ba0/0x1ba0 [ 35.211909] ? kthread_bind+0x40/0x40 [ 35.215721] ret_from_fork+0x3a/0x50 [ 35.219452] Modules linked in: [ 35.222664] Dumping ftrace buffer: [ 35.226397] (ftrace buffer empty) [ 35.230185] ---[ end trace acc861c68509c949 ]--- [ 35.235081] RIP: 0010:kernel_accept+0x5a/0x310 [ 35.240235] Code: 48 c1 ea 03 80 3c 02 00 0f 85 4a 02 00 00 48 b8 00 00 00 00 00 fc ff df 49 8b 5d 20 48 8d bb 48 03 00 00 48 89 fa 48 c1 ea 03 <0f> b6 04 02 84 c0 74 08 3c 03 0f 8e 14 02 00 00 48 8d 7b 10 0f b6 [ 35.259711] RSP: 0018:ffff8801d84b75a8 EFLAGS: 00010206 [ 35.265141] RAX: dffffc0000000000 RBX: 0000000000000000 RCX: 0000000000000000 [ 35.272486] RDX: 0000000000000069 RSI: ffffffff85edda6f RDI: 0000000000000348 [ 35.279792] RBP: ffff8801d84b75d8 R08: ffff8801ac9a2978 R09: 0000000000000006 [ 35.287223] R10: ffff8801ac9a2140 R11: 0000000000000000 R12: ffff8801d84b7688 [ 35.294572] R13: ffff8801a83b2480 R14: 0000000000000000 R15: ffff8801d84b7708 [ 35.301926] FS: 0000000000000000(0000) GS:ffff8801dae00000(0000) knlGS:0000000000000000 [ 35.310196] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 35.316149] CR2: 0000000020000040 CR3: 0000000008e6a000 CR4: 00000000001406f0 [ 35.323633] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 35.330959] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 35.338268] Kernel panic - not syncing: Fatal exception [ 35.344135] Dumping ftrace buffer: [ 35.347662] (ftrace buffer empty) [ 35.351351] Kernel Offset: disabled [ 35.354958] Rebooting in 86400 seconds..