[....] Starting periodic command scheduler: cron[?25l[?1c7[ ok 8[?25h[?0c.
[....] Starting OpenBSD Secure Shell server: sshd[   27.939734] random: sshd: uninitialized urandom read (32 bytes read)
[?25l[?1c7[ ok 8[?25h[?0c.

Debian GNU/Linux 7 syzkaller ttyS0

syzkaller login: [   33.153380] random: sshd: uninitialized urandom read (32 bytes read)
[   33.472376] random: sshd: uninitialized urandom read (32 bytes read)
[   34.649529] random: sshd: uninitialized urandom read (32 bytes read)
[   60.570057] random: sshd: uninitialized urandom read (32 bytes read)
Warning: Permanently added '10.128.10.38' (ECDSA) to the list of known hosts.
[   66.010620] random: sshd: uninitialized urandom read (32 bytes read)
2018/06/12 11:33:29 parsed 1 programs
[   67.408735] random: cc1: uninitialized urandom read (8 bytes read)
2018/06/12 11:33:31 executed programs: 0
[   68.583690] IPVS: ftp: loaded support on port[0] = 21
[   68.597561] IPVS: ftp: loaded support on port[0] = 21
[   68.611565] IPVS: ftp: loaded support on port[0] = 21
[   68.623580] IPVS: ftp: loaded support on port[0] = 21
[   68.641897] IPVS: ftp: loaded support on port[0] = 21
[   68.647133] IPVS: ftp: loaded support on port[0] = 21
[   68.653675] IPVS: ftp: loaded support on port[0] = 21
[   68.656568] IPVS: ftp: loaded support on port[0] = 21
[   68.904881] ==================================================================
[   68.912277] BUG: KMSAN: uninit-value in __list_add_valid+0x1b8/0x450
[   68.918748] CPU: 1 PID: 4532 Comm: sh Not tainted 4.17.0+ #6
[   68.924527] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
[   68.934119] Call Trace:
[   68.934269] ip (4536) used greatest stack depth: 54440 bytes left
[   68.936700]  dump_stack+0x185/0x1d0
[   68.936714]  kmsan_report+0x188/0x2a0
[   68.936724]  __msan_warning_32+0x70/0xc0
[   68.936744]  __list_add_valid+0x1b8/0x450
[   68.958520]  enqueue_task_fair+0xe12/0x4490
[   68.962826]  ? update_load_avg+0x2cc0/0x2cc0
[   68.967230]  wake_up_new_task+0xd34/0x1850
[   68.971448]  _do_fork+0x799/0xf60
[   68.974883]  __x64_sys_clone+0x15e/0x1b0
[   68.978923]  ? __ia32_sys_vfork+0x70/0x70
[   68.983061]  do_syscall_64+0x15b/0x230
[   68.986935]  entry_SYSCALL_64_after_hwframe+0x44/0xa9
[   68.992098] RIP: 0033:0x7f756872ef46
[   68.995793] RSP: 002b:00007ffec4e18290 EFLAGS: 00000246 ORIG_RAX: 0000000000000038
[   69.003475] RAX: ffffffffffffffda RBX: 00007ffec4e18290 RCX: 00007f756872ef46
[   69.010808] RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000001200011
[   69.018053] RBP: 00007ffec4e182d0 R08: 0000000000000000 R09: 0000000000000004
[   69.025296] R10: 00007f7568c259d0 R11: 0000000000000246 R12: 0000000000000000
[   69.032539] R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000
[   69.039786] 
[   69.041385] Uninit was stored to memory at:
[   69.045689]  kmsan_internal_chain_origin+0x12b/0x210
[   69.050775]  __msan_chain_origin+0x69/0xc0
[   69.054983]  pick_next_task_fair+0x2474/0x2530
[   69.059538]  pick_next_task+0x1ba/0x420
[   69.063488]  __schedule+0x20f/0x770
[   69.067088]  do_task_dead+0xc8/0xf0
[   69.070690]  do_exit+0x347e/0x3930
[   69.074224]  do_group_exit+0x1a0/0x360
[   69.078082]  __do_sys_exit_group+0x21/0x30
[   69.082289]  __se_sys_exit_group+0x14/0x20
[   69.086498]  __x64_sys_exit_group+0x4c/0x50
[   69.090791]  do_syscall_64+0x15b/0x230
[   69.094653]  entry_SYSCALL_64_after_hwframe+0x44/0xa9
[   69.099815] Local variable description: ----flags.i.i.i.i@_raw_spin_lock_irqsave
[   69.107420] Variable was created at:
[   69.111109]  _raw_spin_lock_irqsave+0x45/0xf0
[   69.115579]  do_task_dead+0x40/0xf0
[   69.119175] ==================================================================
[   69.126506] Disabling lock debugging due to kernel taint
[   69.131928] Kernel panic - not syncing: panic_on_warn set ...
[   69.131928] 
[   69.139271] CPU: 1 PID: 4532 Comm: sh Tainted: G    B             4.17.0+ #6
[   69.146436] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
[   69.155763] Call Trace:
[   69.158327]  dump_stack+0x185/0x1d0
[   69.161939]  panic+0x3d0/0x990
[   69.165110]  kmsan_report+0x29e/0x2a0
[   69.168887]  __msan_warning_32+0x70/0xc0
[   69.172922]  __list_add_valid+0x1b8/0x450
[   69.177046]  enqueue_task_fair+0xe12/0x4490
[   69.181432]  ? update_load_avg+0x2cc0/0x2cc0
[   69.185816]  wake_up_new_task+0xd34/0x1850
[   69.190028]  _do_fork+0x799/0xf60
[   69.193467]  __x64_sys_clone+0x15e/0x1b0
[   69.197506]  ? __ia32_sys_vfork+0x70/0x70
[   69.201643]  do_syscall_64+0x15b/0x230
[   69.205509]  entry_SYSCALL_64_after_hwframe+0x44/0xa9
[   69.210670] RIP: 0033:0x7f756872ef46
[   69.214356] RSP: 002b:00007ffec4e18290 EFLAGS: 00000246 ORIG_RAX: 0000000000000038
[   69.222036] RAX: ffffffffffffffda RBX: 00007ffec4e18290 RCX: 00007f756872ef46
[   69.229279] RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000001200011
[   69.236521] RBP: 00007ffec4e182d0 R08: 0000000000000000 R09: 0000000000000004
[   69.243764] R10: 00007f7568c259d0 R11: 0000000000000246 R12: 0000000000000000
[   69.251006] R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000
[   70.350390] Shutting down cpus with NMI
[   70.365691] Dumping ftrace buffer:
[   70.369230]    (ftrace buffer empty)
[   70.372915] Kernel Offset: disabled
[   70.376522] Rebooting in 86400 seconds..