[....] Starting periodic command scheduler: cron[?25l[?1c7[ ok 8[?25h[?0c. [....] Starting OpenBSD Secure Shell server: sshd[ 28.823431] random: sshd: uninitialized urandom read (32 bytes read) [?25l[?1c7[ ok 8[?25h[?0c. Debian GNU/Linux 7 syzkaller ttyS0 syzkaller login: [ 32.114293] random: sshd: uninitialized urandom read (32 bytes read) [ 32.780888] random: sshd: uninitialized urandom read (32 bytes read) [ 33.884198] random: sshd: uninitialized urandom read (32 bytes read) [ 54.512640] random: sshd: uninitialized urandom read (32 bytes read) Warning: Permanently added '10.128.0.41' (ECDSA) to the list of known hosts. [ 59.994662] random: sshd: uninitialized urandom read (32 bytes read) 2018/06/29 10:44:37 parsed 1 programs [ 61.237499] random: cc1: uninitialized urandom read (8 bytes read) 2018/06/29 10:44:39 executed programs: 0 [ 62.845724] IPVS: ftp: loaded support on port[0] = 21 [ 62.848754] IPVS: ftp: loaded support on port[0] = 21 [ 62.856979] IPVS: ftp: loaded support on port[0] = 21 [ 62.858920] IPVS: ftp: loaded support on port[0] = 21 [ 62.873503] IPVS: ftp: loaded support on port[0] = 21 [ 62.887547] IPVS: ftp: loaded support on port[0] = 21 [ 62.906697] IPVS: ftp: loaded support on port[0] = 21 [ 62.928605] IPVS: ftp: loaded support on port[0] = 21 [ 63.170064] ================================================================== [ 63.177455] BUG: KMSAN: uninit-value in __list_add_valid+0x1b8/0x450 [ 63.183925] CPU: 1 PID: 4551 Comm: sysctl Not tainted 4.17.0+ #9 [ 63.190043] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 63.199462] Call Trace: [ 63.202035] [ 63.204184] dump_stack+0x185/0x1d0 [ 63.207802] kmsan_report+0x188/0x2a0 [ 63.211591] __msan_warning_32+0x70/0xc0 [ 63.215637] __list_add_valid+0x1b8/0x450 [ 63.219772] enqueue_task_fair+0xe12/0x4490 [ 63.224090] ? __msan_metadata_ptr_for_store_4+0x10/0x20 [ 63.229531] ? update_load_avg+0x2cc0/0x2cc0 [ 63.233931] try_to_wake_up+0x162f/0x2260 [ 63.238082] wake_up_process+0x34/0x40 [ 63.241953] swake_up+0xfb/0x3b0 [ 63.245305] ? __msan_metadata_ptr_for_store_1+0x13/0x20 [ 63.250740] rcu_report_qs_rnp+0x767/0x880 [ 63.254968] rcu_process_callbacks+0x90a/0x2060 [ 63.259627] ? rcu_scheduler_starting+0xe0/0xe0 [ 63.264289] __do_softirq+0x592/0x979 [ 63.268098] irq_exit+0x202/0x240 [ 63.271541] exiting_irq+0xe/0x10 [ 63.274985] smp_apic_timer_interrupt+0x64/0x90 [ 63.279644] apic_timer_interrupt+0xf/0x20 [ 63.283923] [ 63.286149] RIP: 0033:0x7fdd18c22c52 [ 63.289846] RSP: 002b:00007ffdb25ea850 EFLAGS: 00000202 ORIG_RAX: ffffffffffffff13 [ 63.297546] RAX: 0000000000000001 RBX: 00007fdd18e411c8 RCX: 0000000000000000 [ 63.304799] RDX: 00007ffdb25f8040 RSI: 0000000000000000 RDI: 00007ffdb25f8000 [ 63.312144] RBP: 00007ffdb25ea9a0 R08: 00007fdd18e409f0 R09: 0000000000000000 [ 63.319410] R10: 000000006ffffeff R11: 000000006ffffdff R12: 00007fdd18e41758 [ 63.326664] R13: 0000000000000001 R14: 00007fdd18e41030 R15: 0000000000000000 [ 63.334438] [ 63.336105] Uninit was stored to memory at: [ 63.340436] kmsan_internal_chain_origin+0x12b/0x210 [ 63.345525] __msan_chain_origin+0x69/0xc0 [ 63.349745] pick_next_task_fair+0x2474/0x2530 [ 63.354327] pick_next_task+0x1ba/0x420 [ 63.358288] __schedule+0x20f/0x770 [ 63.361918] do_task_dead+0xc8/0xf0 [ 63.365535] do_exit+0x347e/0x3930 [ 63.369066] do_group_exit+0x1a0/0x360 [ 63.372949] __do_sys_exit_group+0x21/0x30 [ 63.377178] __se_sys_exit_group+0x14/0x20 [ 63.381407] __x64_sys_exit_group+0x4c/0x50 [ 63.385715] do_syscall_64+0x15b/0x230 [ 63.389587] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 63.394752] [ 63.396361] Local variable description: ----tlb.i@ldt_arch_exit_mmap [ 63.402829] Variable was created at: [ 63.406533] ldt_arch_exit_mmap+0x46/0x160 [ 63.410757] exit_mmap+0x410/0x980 [ 63.414275] ================================================================== [ 63.421616] Disabling lock debugging due to kernel taint [ 63.427057] Kernel panic - not syncing: panic_on_warn set ... [ 63.427057] [ 63.434416] CPU: 1 PID: 4551 Comm: sysctl Tainted: G B 4.17.0+ #9 [ 63.441949] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 63.451304] Call Trace: [ 63.453879] [ 63.456042] dump_stack+0x185/0x1d0 [ 63.459669] panic+0x3d0/0x990 [ 63.462868] kmsan_report+0x29e/0x2a0 [ 63.466666] __msan_warning_32+0x70/0xc0 [ 63.470734] __list_add_valid+0x1b8/0x450 [ 63.474881] enqueue_task_fair+0xe12/0x4490 [ 63.479317] ? __msan_metadata_ptr_for_store_4+0x10/0x20 [ 63.484766] ? update_load_avg+0x2cc0/0x2cc0 [ 63.489176] try_to_wake_up+0x162f/0x2260 [ 63.493340] wake_up_process+0x34/0x40 [ 63.497232] swake_up+0xfb/0x3b0 [ 63.500592] ? __msan_metadata_ptr_for_store_1+0x13/0x20 [ 63.506029] rcu_report_qs_rnp+0x767/0x880 [ 63.510252] rcu_process_callbacks+0x90a/0x2060 [ 63.514923] ? rcu_scheduler_starting+0xe0/0xe0 [ 63.519601] __do_softirq+0x592/0x979 [ 63.523387] irq_exit+0x202/0x240 [ 63.526825] exiting_irq+0xe/0x10 [ 63.530272] smp_apic_timer_interrupt+0x64/0x90 [ 63.534943] apic_timer_interrupt+0xf/0x20 [ 63.539167] [ 63.541487] RIP: 0033:0x7fdd18c22c52 [ 63.545179] RSP: 002b:00007ffdb25ea850 EFLAGS: 00000202 ORIG_RAX: ffffffffffffff13 [ 63.552886] RAX: 0000000000000001 RBX: 00007fdd18e411c8 RCX: 0000000000000000 [ 63.560160] RDX: 00007ffdb25f8040 RSI: 0000000000000000 RDI: 00007ffdb25f8000 [ 63.567423] RBP: 00007ffdb25ea9a0 R08: 00007fdd18e409f0 R09: 0000000000000000 [ 63.574678] R10: 000000006ffffeff R11: 000000006ffffdff R12: 00007fdd18e41758 [ 63.581937] R13: 0000000000000001 R14: 00007fdd18e41030 R15: 0000000000000000 [ 64.708511] Shutting down cpus with NMI [ 64.724230] Dumping ftrace buffer: [ 64.727792] (ftrace buffer empty) [ 64.731503] Kernel Offset: disabled [ 64.735223] Rebooting in 86400 seconds..