[....] Starting periodic command scheduler: cron[?25l[?1c7[ ok 8[?25h[?0c.
[....] Starting OpenBSD Secure Shell server: sshd[   29.714458] random: sshd: uninitialized urandom read (32 bytes read)
[?25l[?1c7[ ok 8[?25h[?0c.

Debian GNU/Linux 7 syzkaller ttyS0

syzkaller login: [   36.786909] random: sshd: uninitialized urandom read (32 bytes read)
[   37.407332] random: sshd: uninitialized urandom read (32 bytes read)
[   38.578659] random: sshd: uninitialized urandom read (32 bytes read)
[  446.968526] random: sshd: uninitialized urandom read (32 bytes read)
Warning: Permanently added '10.128.10.16' (ECDSA) to the list of known hosts.
[  452.624439] random: sshd: uninitialized urandom read (32 bytes read)
2018/06/22 18:30:21 parsed 1 programs
[  453.837279] random: cc1: uninitialized urandom read (8 bytes read)
2018/06/22 18:30:22 executed programs: 0
[  454.988935] IPVS: ftp: loaded support on port[0] = 21
[  454.995544] IPVS: ftp: loaded support on port[0] = 21
[  455.007375] IPVS: ftp: loaded support on port[0] = 21
[  455.009594] IPVS: ftp: loaded support on port[0] = 21
[  455.015194] IPVS: ftp: loaded support on port[0] = 21
[  455.022868] IPVS: ftp: loaded support on port[0] = 21
[  455.030776] IPVS: ftp: loaded support on port[0] = 21
[  455.040461] IPVS: ftp: loaded support on port[0] = 21
[  455.769322] ip (4660) used greatest stack depth: 54424 bytes left
[  455.953070] ip (4699) used greatest stack depth: 54344 bytes left
[  455.971556] ip (4700) used greatest stack depth: 54328 bytes left
[  456.005124] ==================================================================
[  456.012649] BUG: KMSAN: uninit-value in __list_del_entry_valid+0x23a/0x440
[  456.019669] CPU: 0 PID: 11 Comm: migration/0 Not tainted 4.17.0+ #9
[  456.026448] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
[  456.036138] Call Trace:
[  456.038777]  dump_stack+0x185/0x1d0
[  456.042417]  kmsan_report+0x188/0x2a0
[  456.046212]  __msan_warning_32+0x70/0xc0
[  456.050269]  __list_del_entry_valid+0x23a/0x440
[  456.054921]  dequeue_task_fair+0xad7/0x3300
[  456.059224]  ? __msan_metadata_ptr_for_load_8+0x10/0x20
[  456.064585]  move_queued_task+0x2e8/0xd70
[  456.068734]  ? sched_clock_cpu+0x7e/0x9c0
[  456.072880]  ? enqueue_task_fair+0x4490/0x4490
[  456.077454]  migration_cpu_stop+0x671/0x740
[  456.081770]  cpu_stopper_thread+0x37d/0x7a0
[  456.086078]  ? __msan_metadata_ptr_for_store_1+0x13/0x20
[  456.091533]  ? sched_exec+0x2c0/0x2c0
[  456.095330]  ? cpu_stop_should_run+0x160/0x160
[  456.099891]  smpboot_thread_fn+0x4ac/0x9a0
[  456.104104]  kthread+0x4db/0x6c0
[  456.107447]  ? cpu_report_death+0x1f0/0x1f0
[  456.111745]  ? kthread_blkcg+0xf0/0xf0
[  456.115678]  ret_from_fork+0x35/0x40
[  456.119367] 
[  456.120970] Uninit was stored to memory at:
[  456.125319]  kmsan_internal_chain_origin+0x12b/0x210
[  456.130402]  __msan_chain_origin+0x69/0xc0
[  456.134628]  pick_next_task_fair+0x2474/0x2530
[  456.139199]  pick_next_task+0x1ba/0x420
[  456.143152]  __schedule+0x20f/0x770
[  456.146757]  do_task_dead+0xc8/0xf0
[  456.150373]  do_exit+0x347e/0x3930
[  456.153890]  do_group_exit+0x1a0/0x360
[  456.157839]  __do_sys_exit_group+0x21/0x30
[  456.162051]  __se_sys_exit_group+0x14/0x20
[  456.166264]  __x64_sys_exit_group+0x4c/0x50
[  456.170581]  do_syscall_64+0x15b/0x230
[  456.174458]  entry_SYSCALL_64_after_hwframe+0x44/0xa9
[  456.179628] 
[  456.181230] Local variable description: ----flags.i.i.i.i@_raw_spin_lock_irqsave
[  456.188745] Variable was created at:
[  456.192434]  _raw_spin_lock_irqsave+0x45/0xf0
[  456.196916]  do_task_dead+0x40/0xf0
[  456.200514] ==================================================================
[  456.207846] Disabling lock debugging due to kernel taint
[  456.213356] Kernel panic - not syncing: panic_on_warn set ...
[  456.213356] 
[  456.220715] CPU: 0 PID: 11 Comm: migration/0 Tainted: G    B             4.17.0+ #9
[  456.228493] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
[  456.237836] Call Trace:
[  456.240406]  dump_stack+0x185/0x1d0
[  456.244110]  panic+0x3d0/0x990
[  456.247294]  kmsan_report+0x29e/0x2a0
[  456.251082]  __msan_warning_32+0x70/0xc0
[  456.255999]  __list_del_entry_valid+0x23a/0x440
[  456.260836]  dequeue_task_fair+0xad7/0x3300
[  456.265143]  ? __msan_metadata_ptr_for_load_8+0x10/0x20
[  456.270497]  move_queued_task+0x2e8/0xd70
[  456.274626]  ? sched_clock_cpu+0x7e/0x9c0
[  456.278757]  ? enqueue_task_fair+0x4490/0x4490
[  456.283318]  migration_cpu_stop+0x671/0x740
[  456.287620]  cpu_stopper_thread+0x37d/0x7a0
[  456.291918]  ? __msan_metadata_ptr_for_store_1+0x13/0x20
[  456.297350]  ? sched_exec+0x2c0/0x2c0
[  456.301141]  ? cpu_stop_should_run+0x160/0x160
[  456.305698]  smpboot_thread_fn+0x4ac/0x9a0
[  456.309916]  kthread+0x4db/0x6c0
[  456.313259]  ? cpu_report_death+0x1f0/0x1f0
[  456.317557]  ? kthread_blkcg+0xf0/0xf0
[  456.321424]  ret_from_fork+0x35/0x40
[  457.488918] Shutting down cpus with NMI
[  457.505388] Dumping ftrace buffer:
[  457.508923]    (ftrace buffer empty)
[  457.512614] Kernel Offset: disabled
[  457.516225] Rebooting in 86400 seconds..