[....] Starting periodic command scheduler: cron[?25l[?1c7[ ok 8[?25h[?0c.
[....] Starting OpenBSD Secure Shell server: sshd[   28.943459] random: sshd: uninitialized urandom read (32 bytes read)
[?25l[?1c7[ ok 8[?25h[?0c.

Debian GNU/Linux 7 syzkaller ttyS0

syzkaller login: [   31.418065] random: sshd: uninitialized urandom read (32 bytes read)
[   31.847275] random: sshd: uninitialized urandom read (32 bytes read)
[   32.980510] random: sshd: uninitialized urandom read (32 bytes read)
[  234.895542] random: sshd: uninitialized urandom read (32 bytes read)
Warning: Permanently added '10.128.10.9' (ECDSA) to the list of known hosts.
[  240.422922] random: sshd: uninitialized urandom read (32 bytes read)
2018/06/19 18:56:30 parsed 1 programs
[  241.787880] random: cc1: uninitialized urandom read (8 bytes read)
2018/06/19 18:56:33 executed programs: 0
[  243.103492] IPVS: ftp: loaded support on port[0] = 21
[  243.115893] IPVS: ftp: loaded support on port[0] = 21
[  243.119395] IPVS: ftp: loaded support on port[0] = 21
[  243.143779] IPVS: ftp: loaded support on port[0] = 21
[  243.148760] IPVS: ftp: loaded support on port[0] = 21
[  243.175537] IPVS: ftp: loaded support on port[0] = 21
[  243.176142] IPVS: ftp: loaded support on port[0] = 21
[  243.181127] IPVS: ftp: loaded support on port[0] = 21
[  243.801000] ==================================================================
[  243.808405] BUG: KMSAN: uninit-value in __list_del_entry_valid+0x23a/0x440
[  243.815398] CPU: 0 PID: 11 Comm: migration/0 Not tainted 4.17.0+ #9
[  243.821776] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
[  243.831106] Call Trace:
[  243.833676]  dump_stack+0x185/0x1d0
[  243.837280]  kmsan_report+0x188/0x2a0
[  243.841058]  __msan_warning_32+0x70/0xc0
[  243.845107]  __list_del_entry_valid+0x23a/0x440
[  243.849754]  dequeue_task_fair+0xad7/0x3300
[  243.854052]  ? __msan_metadata_ptr_for_load_8+0x10/0x20
[  243.859395]  move_queued_task+0x2e8/0xd70
[  243.863518]  ? sched_clock_cpu+0x7e/0x9c0
[  243.867643]  ? enqueue_task_fair+0x4490/0x4490
[  243.872204]  migration_cpu_stop+0x671/0x740
[  243.876506]  cpu_stopper_thread+0x37d/0x7a0
[  243.880805]  ? __msan_metadata_ptr_for_store_1+0x13/0x20
[  243.886255]  ? sched_exec+0x2c0/0x2c0
[  243.890036]  ? cpu_stop_should_run+0x160/0x160
[  243.894607]  smpboot_thread_fn+0x4ac/0x9a0
[  243.898833]  kthread+0x4db/0x6c0
[  243.902187]  ? cpu_report_death+0x1f0/0x1f0
[  243.906486]  ? kthread_blkcg+0xf0/0xf0
[  243.910349]  ret_from_fork+0x35/0x40
[  243.914035] 
[  243.915638] Uninit was stored to memory at:
[  243.919942]  kmsan_internal_chain_origin+0x12b/0x210
[  243.925037]  __msan_chain_origin+0x69/0xc0
[  243.929249]  pick_next_task_fair+0x2474/0x2530
[  243.933808]  pick_next_task+0x1ba/0x420
[  243.937759]  __schedule+0x20f/0x770
[  243.941361]  do_task_dead+0xc8/0xf0
[  243.944968]  do_exit+0x347e/0x3930
[  243.948482]  do_group_exit+0x1a0/0x360
[  243.952344]  __do_sys_exit_group+0x21/0x30
[  243.956554]  __se_sys_exit_group+0x14/0x20
[  243.960767]  __x64_sys_exit_group+0x4c/0x50
[  243.965063]  do_syscall_64+0x15b/0x230
[  243.968937]  entry_SYSCALL_64_after_hwframe+0x44/0xa9
[  243.974099] 
[  243.975718] Local variable description: ----tlb.i@ldt_arch_exit_mmap
[  243.982190] Variable was created at:
[  243.985886]  ldt_arch_exit_mmap+0x46/0x160
[  243.990104]  exit_mmap+0x410/0x980
[  243.993614] ==================================================================
[  244.000942] Disabling lock debugging due to kernel taint
[  244.006369] Kernel panic - not syncing: panic_on_warn set ...
[  244.006369] 
[  244.013707] CPU: 0 PID: 11 Comm: migration/0 Tainted: G    B             4.17.0+ #9
[  244.021474] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
[  244.030814] Call Trace:
[  244.033375]  dump_stack+0x185/0x1d0
[  244.036994]  panic+0x3d0/0x990
[  244.040167]  kmsan_report+0x29e/0x2a0
[  244.043961]  __msan_warning_32+0x70/0xc0
[  244.048001]  __list_del_entry_valid+0x23a/0x440
[  244.052658]  dequeue_task_fair+0xad7/0x3300
[  244.056960]  ? __msan_metadata_ptr_for_load_8+0x10/0x20
[  244.062311]  move_queued_task+0x2e8/0xd70
[  244.066434]  ? sched_clock_cpu+0x7e/0x9c0
[  244.070558]  ? enqueue_task_fair+0x4490/0x4490
[  244.075127]  migration_cpu_stop+0x671/0x740
[  244.079428]  cpu_stopper_thread+0x37d/0x7a0
[  244.083726]  ? __msan_metadata_ptr_for_store_1+0x13/0x20
[  244.089162]  ? sched_exec+0x2c0/0x2c0
[  244.092940]  ? cpu_stop_should_run+0x160/0x160
[  244.097499]  smpboot_thread_fn+0x4ac/0x9a0
[  244.101714]  kthread+0x4db/0x6c0
[  244.105055]  ? cpu_report_death+0x1f0/0x1f0
[  244.109352]  ? kthread_blkcg+0xf0/0xf0
[  244.113218]  ret_from_fork+0x35/0x40
[  245.265822] Shutting down cpus with NMI
[  245.282160] Dumping ftrace buffer:
[  245.285689]    (ftrace buffer empty)
[  245.289381] Kernel Offset: disabled
[  245.292996] Rebooting in 86400 seconds..