[....] Starting periodic command scheduler: cron[?25l[?1c7[ ok 8[?25h[?0c.
[....] Starting OpenBSD Secure Shell server: sshd[   29.792129] random: sshd: uninitialized urandom read (32 bytes read)
[?25l[?1c7[ ok 8[?25h[?0c.

Debian GNU/Linux 7 syzkaller ttyS0

syzkaller login: [   32.921285] random: sshd: uninitialized urandom read (32 bytes read)
[   33.218586] random: sshd: uninitialized urandom read (32 bytes read)
[   34.345154] random: sshd: uninitialized urandom read (32 bytes read)
[  140.578813] random: sshd: uninitialized urandom read (32 bytes read)
Warning: Permanently added '10.128.0.62' (ECDSA) to the list of known hosts.
[  146.156192] random: sshd: uninitialized urandom read (32 bytes read)
[  146.265580] IPVS: ftp: loaded support on port[0] = 21
[  146.270276] IPVS: ftp: loaded support on port[0] = 21
[  146.285194] IPVS: ftp: loaded support on port[0] = 21
[  146.285561] IPVS: ftp: loaded support on port[0] = 21
[  146.290631] IPVS: ftp: loaded support on port[0] = 21
[  146.296815] IPVS: ftp: loaded support on port[0] = 21
[  146.302564] IPVS: ftp: loaded support on port[0] = 21
[  146.306410] IPVS: ftp: loaded support on port[0] = 21
[  146.515098] ip (4509) used greatest stack depth: 54424 bytes left
[  146.667677] ip (4541) used greatest stack depth: 54328 bytes left
[  146.700565] ==================================================================
[  146.707945] BUG: KMSAN: uninit-value in __list_del_entry_valid+0x23a/0x440
[  146.714933] CPU: 0 PID: 11 Comm: migration/0 Not tainted 4.17.0+ #7
[  146.721311] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
[  146.730643] Call Trace:
[  146.733207]  dump_stack+0x185/0x1d0
[  146.736809]  kmsan_report+0x188/0x2a0
[  146.740585]  __msan_warning_32+0x70/0xc0
[  146.744628]  __list_del_entry_valid+0x23a/0x440
[  146.749281]  dequeue_task_fair+0xad7/0x3300
[  146.753578]  ? __msan_metadata_ptr_for_load_8+0x10/0x20
[  146.758925]  move_queued_task+0x2e8/0xd70
[  146.763051]  ? sched_clock_cpu+0x7e/0x9c0
[  146.767175]  ? enqueue_task_fair+0x4490/0x4490
[  146.771733]  migration_cpu_stop+0x671/0x740
[  146.776042]  cpu_stopper_thread+0x37d/0x7a0
[  146.780337]  ? __msan_metadata_ptr_for_store_1+0x13/0x20
[  146.785761]  ? sched_exec+0x2c0/0x2c0
[  146.789537]  ? cpu_stop_should_run+0x160/0x160
[  146.794092]  smpboot_thread_fn+0x4ac/0x9a0
[  146.798304]  kthread+0x4db/0x6c0
[  146.801646]  ? cpu_report_death+0x1f0/0x1f0
[  146.805942]  ? kthread_blkcg+0xf0/0xf0
[  146.809808]  ret_from_fork+0x35/0x40
[  146.813493] 
[  146.815091] Uninit was stored to memory at:
[  146.819390]  kmsan_internal_chain_origin+0x12b/0x210
[  146.824473]  __msan_chain_origin+0x69/0xc0
[  146.828680]  pick_next_task_fair+0x2474/0x2530
[  146.833241]  pick_next_task+0x1ba/0x420
[  146.837190]  __schedule+0x20f/0x770
[  146.840793]  do_task_dead+0xc8/0xf0
[  146.844396]  do_exit+0x347e/0x3930
[  146.847911]  do_group_exit+0x1a0/0x360
[  146.851772]  __do_sys_exit_group+0x21/0x30
[  146.855993]  __se_sys_exit_group+0x14/0x20
[  146.860204]  __x64_sys_exit_group+0x4c/0x50
[  146.864500]  do_syscall_64+0x15b/0x230
[  146.868370]  entry_SYSCALL_64_after_hwframe+0x44/0xa9
[  146.873532] Local variable description: ----flags.i.i.i.i@_raw_spin_lock_irqsave
[  146.881033] Variable was created at:
[  146.884721]  _raw_spin_lock_irqsave+0x45/0xf0
[  146.889197]  do_task_dead+0x40/0xf0
[  146.892803] ==================================================================
[  146.900132] Disabling lock debugging due to kernel taint
[  146.905552] Kernel panic - not syncing: panic_on_warn set ...
[  146.905552] 
[  146.912896] CPU: 0 PID: 11 Comm: migration/0 Tainted: G    B             4.17.0+ #7
[  146.920661] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
[  146.929987] Call Trace:
[  146.932557]  dump_stack+0x185/0x1d0
[  146.936161]  panic+0x3d0/0x990
[  146.939333]  kmsan_report+0x29e/0x2a0
[  146.943116]  __msan_warning_32+0x70/0xc0
[  146.947153]  __list_del_entry_valid+0x23a/0x440
[  146.951799]  dequeue_task_fair+0xad7/0x3300
[  146.956102]  ? __msan_metadata_ptr_for_load_8+0x10/0x20
[  146.961444]  move_queued_task+0x2e8/0xd70
[  146.965564]  ? sched_clock_cpu+0x7e/0x9c0
[  146.969687]  ? enqueue_task_fair+0x4490/0x4490
[  146.974250]  migration_cpu_stop+0x671/0x740
[  146.978550]  cpu_stopper_thread+0x37d/0x7a0
[  146.982845]  ? __msan_metadata_ptr_for_store_1+0x13/0x20
[  146.988271]  ? sched_exec+0x2c0/0x2c0
[  146.992049]  ? cpu_stop_should_run+0x160/0x160
[  146.996606]  smpboot_thread_fn+0x4ac/0x9a0
[  147.000820]  kthread+0x4db/0x6c0
[  147.004163]  ? cpu_report_death+0x1f0/0x1f0
[  147.008461]  ? kthread_blkcg+0xf0/0xf0
[  147.012324]  ret_from_fork+0x35/0x40
[  148.103699] Shutting down cpus with NMI
[  148.119045] Dumping ftrace buffer:
[  148.122572]    (ftrace buffer empty)
[  148.126257] Kernel Offset: disabled
[  148.129857] Rebooting in 86400 seconds..