[....] Starting periodic command scheduler: cron[?25l[?1c7[ ok 8[?25h[?0c. [....] Starting OpenBSD Secure Shell server: sshd[ 29.984020] random: sshd: uninitialized urandom read (32 bytes read) [?25l[?1c7[ ok 8[?25h[?0c. Debian GNU/Linux 7 syzkaller ttyS0 syzkaller login: [ 33.388419] random: sshd: uninitialized urandom read (32 bytes read) [ 33.845705] random: sshd: uninitialized urandom read (32 bytes read) [ 35.004096] random: sshd: uninitialized urandom read (32 bytes read) [ 88.576930] random: sshd: uninitialized urandom read (32 bytes read) Warning: Permanently added '10.128.10.38' (ECDSA) to the list of known hosts. [ 94.048072] random: sshd: uninitialized urandom read (32 bytes read) 2018/05/16 00:24:30 parsed 1 programs 2018/05/16 00:24:30 executed programs: 0 [ 94.605120] IPVS: ftp: loaded support on port[0] = 21 [ 94.628411] IPVS: ftp: loaded support on port[0] = 21 [ 94.632646] IPVS: ftp: loaded support on port[0] = 21 [ 94.660587] IPVS: ftp: loaded support on port[0] = 21 [ 94.666017] IPVS: ftp: loaded support on port[0] = 21 [ 94.680278] IPVS: ftp: loaded support on port[0] = 21 [ 94.689069] IPVS: ftp: loaded support on port[0] = 21 [ 94.723652] IPVS: ftp: loaded support on port[0] = 21 2018/05/16 00:24:35 executed programs: 316 2018/05/16 00:24:40 executed programs: 621 2018/05/16 00:24:45 executed programs: 926 2018/05/16 00:24:50 executed programs: 1235 2018/05/16 00:24:55 executed programs: 1539 2018/05/16 00:25:00 executed programs: 1853 [ 125.230151] ================================================================== [ 125.237597] BUG: KMSAN: uninit-value in kick_process+0x12a/0x180 [ 125.246979] CPU: 1 PID: 4570 Comm: udevd Not tainted 4.17.0-rc3+ #94 [ 125.253481] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 125.262842] Call Trace: [ 125.265457] dump_stack+0x185/0x1d0 [ 125.269099] ? kick_process+0x12a/0x180 [ 125.273085] kmsan_report+0x142/0x240 [ 125.276898] __msan_warning_32+0x6c/0xb0 [ 125.280966] kick_process+0x12a/0x180 [ 125.284773] task_work_add+0x2cc/0x300 [ 125.288669] fput+0x146/0x2e0 [ 125.291783] filp_close+0x287/0x2e0 [ 125.295421] __close_fd+0x47b/0x4d0 [ 125.299060] __x64_sys_close+0x90/0x160 [ 125.303043] do_syscall_64+0x154/0x220 [ 125.306940] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 125.312133] RIP: 0033:0x7f859833b2b0 [ 125.315842] RSP: 002b:00007ffec4d56828 EFLAGS: 00000246 ORIG_RAX: 0000000000000003 [ 125.323565] RAX: ffffffffffffffda RBX: 0000000002392250 RCX: 00007f859833b2b0 [ 125.330844] RDX: 00007ffec4d59a80 RSI: 0000000000000002 RDI: 0000000000000007 [ 125.338125] RBP: 0000000000625500 R08: 0000000000000001 R09: 000000000001d8be [ 125.345494] R10: 0000000000000000 R11: 0000000000000246 R12: 00007ffec4d56900 [ 125.352778] R13: 0000000000000001 R14: 00007ffec4d56894 R15: 0000000002392250 [ 125.360055] [ 125.361679] Uninit was stored to memory at: [ 125.366012] kmsan_internal_chain_origin+0x12b/0x210 [ 125.371130] __msan_chain_origin+0x69/0xc0 [ 125.375376] set_task_cpu+0x6e2/0x7c0 [ 125.379190] try_to_wake_up+0xe6e/0x2090 [ 125.383261] default_wake_function+0x92/0xb0 [ 125.387723] __wake_up_locked+0x216/0x370 [ 125.391909] ep_poll_callback+0xd7c/0x11c0 [ 125.396154] __wake_up_common+0x44f/0xa60 [ 125.400309] __wake_up_common_lock+0x196/0x370 [ 125.404899] __wake_up_sync_key+0xcf/0x120 [ 125.409144] pipe_release+0x2cc/0x5a0 [ 125.412952] __fput+0x49e/0xa10 [ 125.416234] ____fput+0x37/0x40 [ 125.419513] task_work_run+0x243/0x2c0 [ 125.423403] do_exit+0x10e1/0x38d0 [ 125.426948] do_group_exit+0x1a0/0x360 [ 125.430842] __do_sys_exit_group+0x21/0x30 [ 125.435081] __se_sys_exit_group+0x14/0x20 [ 125.439317] __x64_sys_exit_group+0x4c/0x50 [ 125.443644] do_syscall_64+0x154/0x220 [ 125.447537] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 125.452738] Local variable description: ----wait.i@do_epoll_wait [ 125.458879] Variable was created at: [ 125.462604] do_epoll_wait+0x10c/0x17c0 [ 125.466585] __x64_sys_epoll_wait+0x116/0x170 [ 125.471073] ================================================================== [ 125.478430] Disabling lock debugging due to kernel taint [ 125.483882] Kernel panic - not syncing: panic_on_warn set ... [ 125.483882] [ 125.491261] CPU: 1 PID: 4570 Comm: udevd Tainted: G B 4.17.0-rc3+ #94 [ 125.499143] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 125.508502] Call Trace: [ 125.511101] dump_stack+0x185/0x1d0 [ 125.514751] panic+0x39d/0x940 [ 125.517966] ? kick_process+0x12a/0x180 [ 125.521946] kmsan_report+0x238/0x240 [ 125.525751] __msan_warning_32+0x6c/0xb0 [ 125.529816] kick_process+0x12a/0x180 [ 125.533621] task_work_add+0x2cc/0x300 [ 125.537514] fput+0x146/0x2e0 [ 125.540624] filp_close+0x287/0x2e0 [ 125.544253] __close_fd+0x47b/0x4d0 [ 125.547887] __x64_sys_close+0x90/0x160 [ 125.551864] do_syscall_64+0x154/0x220 [ 125.555764] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 125.560952] RIP: 0033:0x7f859833b2b0 [ 125.564660] RSP: 002b:00007ffec4d56828 EFLAGS: 00000246 ORIG_RAX: 0000000000000003 [ 125.572366] RAX: ffffffffffffffda RBX: 0000000002392250 RCX: 00007f859833b2b0 [ 125.579637] RDX: 00007ffec4d59a80 RSI: 0000000000000002 RDI: 0000000000000007 [ 125.586912] RBP: 0000000000625500 R08: 0000000000000001 R09: 000000000001d8be [ 125.594181] R10: 0000000000000000 R11: 0000000000000246 R12: 00007ffec4d56900 [ 125.601449] R13: 0000000000000001 R14: 00007ffec4d56894 R15: 0000000002392250 [ 125.609321] Dumping ftrace buffer: [ 125.612857] (ftrace buffer empty) [ 125.616544] Kernel Offset: disabled [ 125.620149] Rebooting in 86400 seconds..