[....] Starting periodic command scheduler: cron[?25l[?1c7[ ok 8[?25h[?0c. [....] Starting OpenBSD Secure Shell server: sshd[ 23.920071] random: sshd: uninitialized urandom read (32 bytes read) [?25l[?1c7[ ok 8[?25h[?0c. Debian GNU/Linux 7 syzkaller ttyS0 syzkaller login: [ 27.561123] random: sshd: uninitialized urandom read (32 bytes read) [ 27.930922] random: sshd: uninitialized urandom read (32 bytes read) [ 28.499753] random: sshd: uninitialized urandom read (32 bytes read) [ 46.773196] random: sshd: uninitialized urandom read (32 bytes read) Warning: Permanently added '10.128.10.5' (ECDSA) to the list of known hosts. [ 52.435038] random: sshd: uninitialized urandom read (32 bytes read) executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program [ 52.555427] kasan: CONFIG_KASAN_INLINE enabled [ 52.560217] kasan: GPF could be caused by NULL-ptr deref or user memory access [ 52.567680] general protection fault: 0000 [#1] SMP KASAN [ 52.573206] CPU: 0 PID: 4472 Comm: kworker/0:3 Not tainted 4.18.0-next-20180820+ #43 [ 52.581066] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 52.590424] Workqueue: events smc_tcp_listen_work [ 52.595273] RIP: 0010:kernel_accept+0x5a/0x310 executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program [ 52.599902] 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 [ 52.618896] RSP: 0018:ffff8801b50375a8 EFLAGS: 00010206 [ 52.624250] RAX: dffffc0000000000 RBX: 0000000000000000 RCX: 0000000000000000 [ 52.631508] RDX: 0000000000000069 RSI: ffffffff850b87ef RDI: 0000000000000348 [ 52.638759] RBP: ffff8801b50375d8 R08: ffff8801d9a42f80 R09: 0000000000000006 [ 52.646021] R10: ffff8801d9a42740 R11: 0000000000000000 R12: ffff8801b5037688 executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program [ 52.653272] R13: ffff8801a894a100 R14: 0000000000000000 R15: ffff8801acd91030 [ 52.660527] FS: 0000000000000000(0000) GS:ffff8801db000000(0000) knlGS:0000000000000000 [ 52.668801] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 52.674733] CR2: 0000000020000100 CR3: 00000001d9b03000 CR4: 00000000001406f0 [ 52.681998] Call Trace: [ 52.684586] smc_tcp_listen_work+0x218/0x11c0 [ 52.689234] ? smc_ioctl+0x1270/0x1270 [ 52.693109] ? __lock_is_held+0xb5/0x140 [ 52.697165] process_one_work+0xc73/0x1aa0 [ 52.701379] ? mark_held_locks+0x160/0x160 executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program [ 52.705610] ? pwq_dec_nr_in_flight+0x4a0/0x4a0 [ 52.710266] ? __switch_to_asm+0x34/0x70 [ 52.714523] ? __switch_to_asm+0x40/0x70 [ 52.718632] ? __switch_to_asm+0x34/0x70 [ 52.722680] ? __switch_to_asm+0x40/0x70 [ 52.726728] ? __switch_to_asm+0x34/0x70 [ 52.730779] ? __switch_to_asm+0x40/0x70 [ 52.734979] ? __switch_to_asm+0x34/0x70 [ 52.739024] ? __switch_to_asm+0x40/0x70 [ 52.743191] ? __switch_to_asm+0x34/0x70 [ 52.747264] ? __sched_text_start+0x8/0x8 [ 52.751417] ? lock_downgrade+0x8f0/0x8f0 executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program [ 52.755619] ? graph_lock+0x170/0x170 [ 52.759424] ? graph_lock+0x170/0x170 [ 52.763211] ? lock_acquire+0x1e4/0x4f0 [ 52.767259] ? worker_thread+0x3dc/0x13c0 [ 52.771399] ? lock_release+0x9f0/0x9f0 [ 52.775372] ? trace_hardirqs_off+0xb8/0x2b0 [ 52.779903] ? kasan_check_read+0x11/0x20 [ 52.784083] ? worker_thread+0x3dc/0x13c0 [ 52.788219] ? trace_hardirqs_on+0x2c0/0x2c0 [ 52.792617] ? kasan_check_write+0x14/0x20 [ 52.796839] ? do_raw_spin_lock+0xc1/0x200 [ 52.801069] worker_thread+0x189/0x13c0 executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program [ 52.805032] ? __switch_to_asm+0x34/0x70 [ 52.809127] ? __switch_to_asm+0x34/0x70 [ 52.813339] ? __switch_to_asm+0x40/0x70 [ 52.817467] ? process_one_work+0x1aa0/0x1aa0 [ 52.821953] ? graph_lock+0x170/0x170 [ 52.825782] ? __sched_text_start+0x8/0x8 [ 52.829917] ? graph_lock+0x170/0x170 [ 52.833702] ? find_held_lock+0x36/0x1c0 [ 52.837749] ? trace_hardirqs_on_thunk+0x1a/0x1c [ 52.842496] ? find_held_lock+0x36/0x1c0 [ 52.846590] ? _raw_spin_unlock_irqrestore+0x74/0xc0 [ 52.851683] ? _raw_spin_unlock_irqrestore+0x74/0xc0 executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program [ 52.856767] ? lockdep_hardirqs_on+0x421/0x5c0 [ 52.861334] ? trace_hardirqs_on+0xbd/0x2c0 [ 52.865640] ? kasan_check_read+0x11/0x20 [ 52.869775] ? __kthread_parkme+0xd7/0x1b0 [ 52.873993] ? trace_hardirqs_off_caller+0x2b0/0x2b0 [ 52.879086] ? kasan_check_write+0x14/0x20 [ 52.883306] ? __kthread_parkme+0x58/0x1b0 [ 52.887528] ? __sanitizer_cov_trace_const_cmp8+0x18/0x20 [ 52.893047] ? __kthread_parkme+0x106/0x1b0 [ 52.897353] kthread+0x35a/0x420 [ 52.900824] ? process_one_work+0x1aa0/0x1aa0 executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program [ 52.905964] ? kthread_bind+0x40/0x40 [ 52.909753] ret_from_fork+0x3a/0x50 [ 52.913464] Modules linked in: [ 52.916642] Dumping ftrace buffer: [ 52.920179] (ftrace buffer empty) [ 52.923998] ---[ end trace a5d31f74da3c34c2 ]--- [ 52.928777] RIP: 0010:kernel_accept+0x5a/0x310 [ 52.933504] 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 executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program [ 52.952421] RSP: 0018:ffff8801b50375a8 EFLAGS: 00010206 [ 52.957825] RAX: dffffc0000000000 RBX: 0000000000000000 RCX: 0000000000000000 [ 52.965132] RDX: 0000000000000069 RSI: ffffffff850b87ef RDI: 0000000000000348 [ 52.972443] RBP: ffff8801b50375d8 R08: ffff8801d9a42f80 R09: 0000000000000006 [ 52.979726] R10: ffff8801d9a42740 R11: 0000000000000000 R12: ffff8801b5037688 [ 52.987094] R13: ffff8801a894a100 R14: 0000000000000000 R15: ffff8801acd91030 [ 52.994504] FS: 0000000000000000(0000) GS:ffff8801db000000(0000) knlGS:0000000000000000 executing program executing program executing program executing program [ 53.002870] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 53.008757] CR2: 0000000020000100 CR3: 00000001d9b03000 CR4: 00000000001406f0 [ 53.016044] Kernel panic - not syncing: Fatal exception [ 53.021774] Dumping ftrace buffer: [ 53.025300] (ftrace buffer empty) [ 53.028992] Kernel Offset: disabled [ 53.032614] Rebooting in 86400 seconds..