[....] Starting periodic command scheduler: cron[?25l[?1c7[ ok 8[?25h[?0c.
[....] Starting OpenBSD Secure Shell server: sshd[   29.203345] random: sshd: uninitialized urandom read (32 bytes read)
[?25l[?1c7[ ok 8[?25h[?0c.

Debian GNU/Linux 7 syzkaller ttyS0

syzkaller login: [   32.257283] random: sshd: uninitialized urandom read (32 bytes read)
[   32.568696] random: sshd: uninitialized urandom read (32 bytes read)
[   33.705876] random: sshd: uninitialized urandom read (32 bytes read)
[   51.432648] random: sshd: uninitialized urandom read (32 bytes read)
Warning: Permanently added '10.128.10.23' (ECDSA) to the list of known hosts.
[   56.979576] random: sshd: uninitialized urandom read (32 bytes read)
2018/06/17 08:27:30 parsed 1 programs
[   58.241336] random: cc1: uninitialized urandom read (8 bytes read)
2018/06/17 08:27:32 executed programs: 0
[   59.309208] IPVS: ftp: loaded support on port[0] = 21
[   59.330949] IPVS: ftp: loaded support on port[0] = 21
[   59.336728] IPVS: ftp: loaded support on port[0] = 21
[   59.341249] IPVS: ftp: loaded support on port[0] = 21
[   59.366919] IPVS: ftp: loaded support on port[0] = 21
[   59.387807] IPVS: ftp: loaded support on port[0] = 21
[   59.402088] IPVS: ftp: loaded support on port[0] = 21
[   59.404306] IPVS: ftp: loaded support on port[0] = 21
[   60.012747] ip (4627) used greatest stack depth: 54440 bytes left
[   60.089095] ip (4647) used greatest stack depth: 54424 bytes left
[   60.161657] ip (4657) used greatest stack depth: 54344 bytes left
[   60.383681] ip (4704) used greatest stack depth: 54328 bytes left
[   60.505920] ==================================================================
[   60.513332] BUG: KMSAN: uninit-value in __list_del_entry_valid+0x23a/0x440
[   60.520324] CPU: 1 PID: 14 Comm: migration/1 Not tainted 4.17.0+ #8
[   60.526704] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
[   60.536034] Call Trace:
[   60.538608]  dump_stack+0x185/0x1d0
[   60.542213]  kmsan_report+0x188/0x2a0
[   60.546005]  __msan_warning_32+0x70/0xc0
[   60.550042]  __list_del_entry_valid+0x23a/0x440
[   60.554691]  dequeue_task_fair+0xad7/0x3300
[   60.558989]  ? __msan_metadata_ptr_for_load_8+0x10/0x20
[   60.564333]  move_queued_task+0x2e8/0xd70
[   60.568458]  ? sched_clock_cpu+0x7e/0x9c0
[   60.572585]  ? enqueue_task_fair+0x4490/0x4490
[   60.577144]  migration_cpu_stop+0x671/0x740
[   60.581447]  cpu_stopper_thread+0x37d/0x7a0
[   60.585745]  ? __msan_metadata_ptr_for_store_1+0x13/0x20
[   60.591170]  ? sched_exec+0x2c0/0x2c0
[   60.594959]  ? cpu_stop_should_run+0x160/0x160
[   60.599518]  smpboot_thread_fn+0x4ac/0x9a0
[   60.603731]  kthread+0x4db/0x6c0
[   60.607072]  ? cpu_report_death+0x1f0/0x1f0
[   60.611373]  ? kthread_blkcg+0xf0/0xf0
[   60.615252]  ret_from_fork+0x35/0x40
[   60.618939] 
[   60.620539] Uninit was stored to memory at:
[   60.624854]  kmsan_internal_chain_origin+0x12b/0x210
[   60.629930]  __msan_chain_origin+0x69/0xc0
[   60.634139]  pick_next_task_fair+0x2474/0x2530
[   60.638694]  pick_next_task+0x1ba/0x420
[   60.642641]  __schedule+0x20f/0x770
[   60.646244]  do_task_dead+0xc8/0xf0
[   60.649853]  do_exit+0x347e/0x3930
[   60.653369]  do_group_exit+0x1a0/0x360
[   60.657231]  __do_sys_exit_group+0x21/0x30
[   60.661442]  __se_sys_exit_group+0x14/0x20
[   60.665650]  __x64_sys_exit_group+0x4c/0x50
[   60.669945]  do_syscall_64+0x15b/0x230
[   60.673808]  entry_SYSCALL_64_after_hwframe+0x44/0xa9
[   60.678966] 
[   60.680568] Local variable description: ----tlb.i@ldt_arch_exit_mmap
[   60.687028] Variable was created at:
[   60.690719]  ldt_arch_exit_mmap+0x46/0x160
[   60.694942]  exit_mmap+0x410/0x980
[   60.698455] ==================================================================
[   60.705785] Disabling lock debugging due to kernel taint
[   60.711208] Kernel panic - not syncing: panic_on_warn set ...
[   60.711208] 
[   60.718547] CPU: 1 PID: 14 Comm: migration/1 Tainted: G    B             4.17.0+ #8
[   60.726312] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
[   60.735640] Call Trace:
[   60.738206]  dump_stack+0x185/0x1d0
[   60.741811]  panic+0x3d0/0x990
[   60.744993]  kmsan_report+0x29e/0x2a0
[   60.748769]  __msan_warning_32+0x70/0xc0
[   60.752807]  __list_del_entry_valid+0x23a/0x440
[   60.757465]  dequeue_task_fair+0xad7/0x3300
[   60.761762]  ? __msan_metadata_ptr_for_load_8+0x10/0x20
[   60.767115]  move_queued_task+0x2e8/0xd70
[   60.771240]  ? sched_clock_cpu+0x7e/0x9c0
[   60.775364]  ? enqueue_task_fair+0x4490/0x4490
[   60.779925]  migration_cpu_stop+0x671/0x740
[   60.784226]  cpu_stopper_thread+0x37d/0x7a0
[   60.788521]  ? __msan_metadata_ptr_for_store_1+0x13/0x20
[   60.793958]  ? sched_exec+0x2c0/0x2c0
[   60.797736]  ? cpu_stop_should_run+0x160/0x160
[   60.802293]  smpboot_thread_fn+0x4ac/0x9a0
[   60.806504]  kthread+0x4db/0x6c0
[   60.809845]  ? cpu_report_death+0x1f0/0x1f0
[   60.814147]  ? kthread_blkcg+0xf0/0xf0
[   60.818011]  ret_from_fork+0x35/0x40
[   61.995498] Shutting down cpus with NMI
[   62.011644] Dumping ftrace buffer:
[   62.015167]    (ftrace buffer empty)
[   62.018853] Kernel Offset: disabled
[   62.022460] Rebooting in 86400 seconds..