[....] Starting enhanced syslogd: rsyslogd[?25l[?1c7[ ok 8[?25h[?0c. [....] Starting periodic command scheduler: cron[?25l[?1c7[ ok 8[?25h[?0c. [....] Starting OpenBSD Secure Shell server: sshd[ 31.907978] random: sshd: uninitialized urandom read (32 bytes read) [?25l[?1c7[ ok 8[?25h[?0c. Debian GNU/Linux 7 syzkaller ttyS0 syzkaller login: [ 35.395684] random: sshd: uninitialized urandom read (32 bytes read) [ 35.708675] random: sshd: uninitialized urandom read (32 bytes read) [ 37.113290] random: sshd: uninitialized urandom read (32 bytes read) Warning: Permanently added '10.128.10.26' (ECDSA) to the list of known hosts. [ 42.696059] random: sshd: uninitialized urandom read (32 bytes read) 2018/07/02 15:43:59 fuzzer started [ 43.987577] random: cc1: uninitialized urandom read (8 bytes read) 2018/07/02 15:44:02 dialing manager at 10.128.0.26:36811 2018/07/02 15:44:04 syscalls: 1518 2018/07/02 15:44:04 code coverage: enabled 2018/07/02 15:44:04 comparison tracing: ioctl(KCOV_TRACE_CMP) failed: errno 524 2018/07/02 15:44:04 setuid sandbox: enabled 2018/07/02 15:44:04 namespace sandbox: enabled 2018/07/02 15:44:04 fault injection: enabled 2018/07/02 15:44:04 leak checking: CONFIG_DEBUG_KMEMLEAK is not enabled 2018/07/02 15:44:04 net packed injection: enabled [ 49.144575] random: crng init done [ 106.035921] ================================================================== [ 106.043353] BUG: KMSAN: uninit-value in sg_init_one+0x1f7/0x290 [ 106.049421] CPU: 1 PID: 0 Comm: swapper/1 Not tainted 4.17.0+ #16 [ 106.055633] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 106.064964] Call Trace: [ 106.067553] [ 106.069689] dump_stack+0x185/0x1d0 [ 106.073296] kmsan_report+0x188/0x2a0 [ 106.077072] __msan_warning_32+0x70/0xc0 [ 106.081113] sg_init_one+0x1f7/0x290 [ 106.084804] try_fill_recv+0x6ed/0x2580 [ 106.088758] virtnet_poll+0xfe3/0x1420 [ 106.092622] ? refill_work+0x2c0/0x2c0 [ 106.096486] net_rx_action+0x766/0x1a80 [ 106.100451] ? net_tx_action+0xad0/0xad0 [ 106.104495] __do_softirq+0x592/0x979 [ 106.108274] irq_exit+0x207/0x240 [ 106.111706] exiting_irq+0xe/0x10 [ 106.115136] do_IRQ+0x17d/0x1c0 [ 106.118389] common_interrupt+0xf/0xf [ 106.122170] [ 106.124396] RIP: 0010:default_idle+0x20b/0x3e0 [ 106.128951] RSP: 0018:ffff8801d1e3fdf0 EFLAGS: 00000246 ORIG_RAX: ffffffffffffffd5 [ 106.136635] RAX: ffff8801fd432f18 RBX: 0000000000000000 RCX: ffff8801fd032f18 [ 106.143879] RDX: ffff8801fd032f18 RSI: aaaaaaaaaaaab000 RDI: ffffea00004212c0 [ 106.151124] RBP: ffff8801d1e3fe28 R08: 0000000001080020 R09: 0000000000000002 [ 106.158373] R10: 00000018afe16780 R11: ffffffff89ff18c0 R12: ffff8801d1e3fe8f [ 106.165624] R13: ffff8801d1ccd7c0 R14: ffff8801d1e3fe8c R15: ffff8801d1cce098 [ 106.172890] ? __cpuidle_text_start+0x8/0x8 [ 106.177194] ? __cpuidle_text_start+0x8/0x8 [ 106.181502] arch_cpu_idle+0x26/0x30 [ 106.185200] do_idle+0x36d/0x830 [ 106.188552] cpu_startup_entry+0x45/0x50 [ 106.192603] ? setup_APIC_timer+0x220/0x220 [ 106.196910] start_secondary+0x3c6/0x490 [ 106.200978] secondary_startup_64+0xa5/0xb0 [ 106.205280] [ 106.206889] Local variable description: ----list@net_rx_action [ 106.212831] Variable was created at: [ 106.216534] net_rx_action+0x6e/0x1a80 [ 106.220404] __do_softirq+0x592/0x979 [ 106.224181] ================================================================== [ 106.231521] Disabling lock debugging due to kernel taint [ 106.236960] Kernel panic - not syncing: panic_on_warn set ... [ 106.236960] [ 106.244322] CPU: 1 PID: 0 Comm: swapper/1 Tainted: G B 4.17.0+ #16 [ 106.251919] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 106.261249] Call Trace: [ 106.263807] [ 106.265942] dump_stack+0x185/0x1d0 [ 106.269558] panic+0x3d0/0x990 [ 106.272764] kmsan_report+0x29e/0x2a0 [ 106.276552] __msan_warning_32+0x70/0xc0 [ 106.280598] sg_init_one+0x1f7/0x290 [ 106.284294] try_fill_recv+0x6ed/0x2580 [ 106.288263] virtnet_poll+0xfe3/0x1420 [ 106.292128] ? refill_work+0x2c0/0x2c0 [ 106.296002] net_rx_action+0x766/0x1a80 [ 106.299963] ? net_tx_action+0xad0/0xad0 [ 106.303999] __do_softirq+0x592/0x979 [ 106.307780] irq_exit+0x207/0x240 [ 106.311217] exiting_irq+0xe/0x10 [ 106.314652] do_IRQ+0x17d/0x1c0 [ 106.317910] common_interrupt+0xf/0xf [ 106.321684] [ 106.323898] RIP: 0010:default_idle+0x20b/0x3e0 [ 106.328454] RSP: 0018:ffff8801d1e3fdf0 EFLAGS: 00000246 ORIG_RAX: ffffffffffffffd5 [ 106.336160] RAX: ffff8801fd432f18 RBX: 0000000000000000 RCX: ffff8801fd032f18 [ 106.343405] RDX: ffff8801fd032f18 RSI: aaaaaaaaaaaab000 RDI: ffffea00004212c0 [ 106.350653] RBP: ffff8801d1e3fe28 R08: 0000000001080020 R09: 0000000000000002 [ 106.357901] R10: 00000018afe16780 R11: ffffffff89ff18c0 R12: ffff8801d1e3fe8f [ 106.365149] R13: ffff8801d1ccd7c0 R14: ffff8801d1e3fe8c R15: ffff8801d1cce098 [ 106.372416] ? __cpuidle_text_start+0x8/0x8 [ 106.376715] ? __cpuidle_text_start+0x8/0x8 [ 106.381011] arch_cpu_idle+0x26/0x30 [ 106.384699] do_idle+0x36d/0x830 [ 106.388048] cpu_startup_entry+0x45/0x50 [ 106.392085] ? setup_APIC_timer+0x220/0x220 [ 106.396384] start_secondary+0x3c6/0x490 [ 106.400423] secondary_startup_64+0xa5/0xb0 [ 106.405263] Dumping ftrace buffer: [ 106.408799] (ftrace buffer empty) [ 106.412483] Kernel Offset: disabled [ 106.416081] Rebooting in 86400 seconds..