[....] Starting periodic command scheduler: cron[?25l[?1c7[ ok 8[?25h[?0c.
[....] Starting OpenBSD Secure Shell server: sshd[   30.058317] random: sshd: uninitialized urandom read (32 bytes read)
[?25l[?1c7[ ok 8[?25h[?0c.

Debian GNU/Linux 7 syzkaller ttyS0

syzkaller login: [   33.603182] random: sshd: uninitialized urandom read (32 bytes read)
[   34.126387] random: sshd: uninitialized urandom read (32 bytes read)
[   35.285773] random: sshd: uninitialized urandom read (32 bytes read)
[   39.033371] random: sshd: uninitialized urandom read (32 bytes read)
Warning: Permanently added '10.128.10.35' (ECDSA) to the list of known hosts.
[   44.552072] random: sshd: uninitialized urandom read (32 bytes read)
2018/06/19 03:55:05 parsed 1 programs
[   45.841822] random: cc1: uninitialized urandom read (8 bytes read)
2018/06/19 03:55:07 executed programs: 0
[   47.116994] IPVS: ftp: loaded support on port[0] = 21
[   47.143799] IPVS: ftp: loaded support on port[0] = 21
[   47.149382] IPVS: ftp: loaded support on port[0] = 21
[   47.157434] IPVS: ftp: loaded support on port[0] = 21
[   47.159366] IPVS: ftp: loaded support on port[0] = 21
[   47.169221] IPVS: ftp: loaded support on port[0] = 21
[   47.179595] IPVS: ftp: loaded support on port[0] = 21
[   47.181853] IPVS: ftp: loaded support on port[0] = 21
[   47.803513] ==================================================================
[   47.810952] BUG: KMSAN: uninit-value in __list_del_entry_valid+0x23a/0x440
[   47.818909] CPU: 1 PID: 14 Comm: migration/1 Not tainted 4.17.0+ #9
[   47.825297] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
[   47.834683] Call Trace:
[   47.837275]  dump_stack+0x185/0x1d0
[   47.840888]  kmsan_report+0x188/0x2a0
[   47.844678]  __msan_warning_32+0x70/0xc0
[   47.848729]  __list_del_entry_valid+0x23a/0x440
[   47.853389]  dequeue_task_fair+0xad7/0x3300
[   47.857724]  ? __msan_metadata_ptr_for_load_8+0x10/0x20
[   47.863167]  move_queued_task+0x2e8/0xd70
[   47.867338]  ? sched_clock_cpu+0x7e/0x9c0
[   47.871523]  ? enqueue_task_fair+0x4490/0x4490
[   47.876150]  migration_cpu_stop+0x671/0x740
[   47.880709]  cpu_stopper_thread+0x37d/0x7a0
[   47.885078]  ? __msan_metadata_ptr_for_store_1+0x13/0x20
[   47.890546]  ? sched_exec+0x2c0/0x2c0
[   47.894436]  ? cpu_stop_should_run+0x160/0x160
[   47.899034]  smpboot_thread_fn+0x4ac/0x9a0
[   47.903289]  kthread+0x4db/0x6c0
[   47.907086]  ? cpu_report_death+0x1f0/0x1f0
[   47.911426]  ? kthread_blkcg+0xf0/0xf0
[   47.915328]  ret_from_fork+0x35/0x40
[   47.919052] 
[   47.920670] Uninit was stored to memory at:
[   47.925022]  kmsan_internal_chain_origin+0x12b/0x210
[   47.930136]  __msan_chain_origin+0x69/0xc0
[   47.934643]  pick_next_task_fair+0x2474/0x2530
[   47.939230]  pick_next_task+0x1ba/0x420
[   47.943222]  __schedule+0x20f/0x770
[   47.946866]  do_task_dead+0xc8/0xf0
[   47.950486]  do_exit+0x347e/0x3930
[   47.954098]  do_group_exit+0x1a0/0x360
[   47.958317]  __do_sys_exit_group+0x21/0x30
[   47.962544]  __se_sys_exit_group+0x14/0x20
[   47.966775]  __x64_sys_exit_group+0x4c/0x50
[   47.971107]  do_syscall_64+0x15b/0x230
[   47.975071]  entry_SYSCALL_64_after_hwframe+0x44/0xa9
[   47.980279] 
[   47.981943] Local variable description: ----tlb.i@ldt_arch_exit_mmap
[   47.988426] Variable was created at:
[   47.992153]  ldt_arch_exit_mmap+0x46/0x160
[   47.996394]  exit_mmap+0x410/0x980
[   47.999918] ==================================================================
[   48.007254] Disabling lock debugging due to kernel taint
[   48.012718] Kernel panic - not syncing: panic_on_warn set ...
[   48.012718] 
[   48.020098] CPU: 1 PID: 14 Comm: migration/1 Tainted: G    B             4.17.0+ #9
[   48.027917] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
[   48.037282] Call Trace:
[   48.039897]  dump_stack+0x185/0x1d0
[   48.043542]  panic+0x3d0/0x990
[   48.046765]  kmsan_report+0x29e/0x2a0
[   48.050580]  __msan_warning_32+0x70/0xc0
[   48.054623]  __list_del_entry_valid+0x23a/0x440
[   48.059279]  dequeue_task_fair+0xad7/0x3300
[   48.063584]  ? __msan_metadata_ptr_for_load_8+0x10/0x20
[   48.068942]  move_queued_task+0x2e8/0xd70
[   48.073069]  ? sched_clock_cpu+0x7e/0x9c0
[   48.077200]  ? enqueue_task_fair+0x4490/0x4490
[   48.081813]  migration_cpu_stop+0x671/0x740
[   48.086124]  cpu_stopper_thread+0x37d/0x7a0
[   48.090446]  ? __msan_metadata_ptr_for_store_1+0x13/0x20
[   48.095901]  ? sched_exec+0x2c0/0x2c0
[   48.099701]  ? cpu_stop_should_run+0x160/0x160
[   48.104264]  smpboot_thread_fn+0x4ac/0x9a0
[   48.108487]  kthread+0x4db/0x6c0
[   48.111848]  ? cpu_report_death+0x1f0/0x1f0
[   48.116151]  ? kthread_blkcg+0xf0/0xf0
[   48.120022]  ret_from_fork+0x35/0x40
[   49.253060] Shutting down cpus with NMI
[   49.269543] Dumping ftrace buffer:
[   49.273081]    (ftrace buffer empty)
[   49.276774] Kernel Offset: disabled
[   49.280382] Rebooting in 86400 seconds..