[....] 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[ 31.840295] random: sshd: uninitialized urandom read (32 bytes read) [?25l[?1c7[ ok 8[?25h[?0c. [ 32.305903] random: sshd: uninitialized urandom read (32 bytes read) [ 32.796634] random: sshd: uninitialized urandom read (32 bytes read) Debian GNU/Linux 7 syzkaller ttyS0 syzkaller login: [ 34.155253] random: sshd: uninitialized urandom read (32 bytes read) Warning: Permanently added '10.128.0.21' (ECDSA) to the list of known hosts. [ 39.667503] random: sshd: uninitialized urandom read (32 bytes read) 2018/07/04 11:25:58 fuzzer started [ 41.243217] random: cc1: uninitialized urandom read (8 bytes read) 2018/07/04 11:26:02 dialing manager at 10.128.0.26:34161 2018/07/04 11:26:04 syscalls: 1541 2018/07/04 11:26:04 code coverage: enabled 2018/07/04 11:26:04 comparison tracing: ioctl(KCOV_TRACE_CMP) failed: errno 524 2018/07/04 11:26:04 setuid sandbox: enabled 2018/07/04 11:26:04 namespace sandbox: enabled 2018/07/04 11:26:04 fault injection: enabled 2018/07/04 11:26:04 leak checking: CONFIG_DEBUG_KMEMLEAK is not enabled 2018/07/04 11:26:04 net packed injection: enabled [ 46.522862] random: crng init done [ 111.126087] ================================================================== [ 111.133518] BUG: KMSAN: uninit-value in sg_init_one+0x1f7/0x290 [ 111.139581] CPU: 0 PID: 0 Comm: swapper/0 Not tainted 4.17.0+ #17 [ 111.145788] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 111.155118] Call Trace: [ 111.157682] [ 111.159811] dump_stack+0x185/0x1d0 [ 111.163420] kmsan_report+0x188/0x2a0 [ 111.167200] __msan_warning_32+0x70/0xc0 [ 111.171238] sg_init_one+0x1f7/0x290 [ 111.174938] try_fill_recv+0x6ed/0x2580 [ 111.178919] virtnet_poll+0xfe3/0x1420 [ 111.182803] ? kmsan_set_origin_inline+0x6b/0x120 [ 111.187628] ? refill_work+0x2c0/0x2c0 [ 111.191495] net_rx_action+0x766/0x1a80 [ 111.195457] ? net_tx_action+0xad0/0xad0 [ 111.199495] __do_softirq+0x592/0x979 [ 111.203291] irq_exit+0x207/0x240 [ 111.206729] exiting_irq+0xe/0x10 [ 111.210186] do_IRQ+0x17d/0x1c0 [ 111.213442] common_interrupt+0xf/0xf [ 111.217213] [ 111.219426] RIP: 0010:default_idle+0x20b/0x3e0 [ 111.223982] RSP: 0018:ffffffff8ac0fd90 EFLAGS: 00000246 ORIG_RAX: ffffffffffffffd9 [ 111.231671] RAX: ffff8801fd432f18 RBX: 0000000000000000 RCX: ffff8801fd032f18 [ 111.238918] RDX: ffff8801fd032f18 RSI: aaaaaaaaaaaab000 RDI: ffffea00004212c0 [ 111.246163] RBP: ffffffff8ac0fdc8 R08: 0000000001080020 R09: 0000000000000002 [ 111.253406] R10: 00000019df44a400 R11: ffffffff89ff18c0 R12: ffffffff8ac0fe2f [ 111.260650] R13: ffffffff8ac372c0 R14: ffffffff8ac0fe2c R15: ffffffff8ac37b98 [ 111.267900] ? __cpuidle_text_start+0x8/0x8 [ 111.272202] ? __cpuidle_text_start+0x8/0x8 [ 111.276500] arch_cpu_idle+0x26/0x30 [ 111.280188] do_idle+0x36d/0x830 [ 111.283530] cpu_startup_entry+0x45/0x50 [ 111.287582] rest_init+0x1c1/0x1f0 [ 111.291108] ? hpet_time_init+0xa0/0xe0 [ 111.295059] start_kernel+0x1110/0x1120 [ 111.299007] x86_64_start_kernel+0xf0/0x100 [ 111.303303] secondary_startup_64+0xa5/0xb0 [ 111.307597] [ 111.309199] Local variable description: ----list@net_rx_action [ 111.315158] Variable was created at: [ 111.318859] net_rx_action+0x6e/0x1a80 [ 111.322729] __do_softirq+0x592/0x979 [ 111.326497] ================================================================== [ 111.333837] Disabling lock debugging due to kernel taint [ 111.339266] Kernel panic - not syncing: panic_on_warn set ... [ 111.339266] [ 111.346608] CPU: 0 PID: 0 Comm: swapper/0 Tainted: G B 4.17.0+ #17 [ 111.354209] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 111.363538] Call Trace: [ 111.366095] [ 111.368224] dump_stack+0x185/0x1d0 [ 111.371832] panic+0x3d0/0x990 [ 111.375006] kmsan_report+0x29e/0x2a0 [ 111.378782] __msan_warning_32+0x70/0xc0 [ 111.382819] sg_init_one+0x1f7/0x290 [ 111.386509] try_fill_recv+0x6ed/0x2580 [ 111.390463] virtnet_poll+0xfe3/0x1420 [ 111.394328] ? kmsan_set_origin_inline+0x6b/0x120 [ 111.399158] ? refill_work+0x2c0/0x2c0 [ 111.403033] net_rx_action+0x766/0x1a80 [ 111.406988] ? net_tx_action+0xad0/0xad0 [ 111.411025] __do_softirq+0x592/0x979 [ 111.414810] irq_exit+0x207/0x240 [ 111.418242] exiting_irq+0xe/0x10 [ 111.421679] do_IRQ+0x17d/0x1c0 [ 111.424933] common_interrupt+0xf/0xf [ 111.428704] [ 111.430920] RIP: 0010:default_idle+0x20b/0x3e0 [ 111.435473] RSP: 0018:ffffffff8ac0fd90 EFLAGS: 00000246 ORIG_RAX: ffffffffffffffd9 [ 111.443157] RAX: ffff8801fd432f18 RBX: 0000000000000000 RCX: ffff8801fd032f18 [ 111.450403] RDX: ffff8801fd032f18 RSI: aaaaaaaaaaaab000 RDI: ffffea00004212c0 [ 111.457654] RBP: ffffffff8ac0fdc8 R08: 0000000001080020 R09: 0000000000000002 [ 111.464901] R10: 00000019df44a400 R11: ffffffff89ff18c0 R12: ffffffff8ac0fe2f [ 111.472146] R13: ffffffff8ac372c0 R14: ffffffff8ac0fe2c R15: ffffffff8ac37b98 [ 111.479401] ? __cpuidle_text_start+0x8/0x8 [ 111.483702] ? __cpuidle_text_start+0x8/0x8 [ 111.488001] arch_cpu_idle+0x26/0x30 [ 111.491690] do_idle+0x36d/0x830 [ 111.495032] cpu_startup_entry+0x45/0x50 [ 111.499069] rest_init+0x1c1/0x1f0 [ 111.502588] ? hpet_time_init+0xa0/0xe0 [ 111.506539] start_kernel+0x1110/0x1120 [ 111.510490] x86_64_start_kernel+0xf0/0x100 [ 111.514789] secondary_startup_64+0xa5/0xb0 [ 111.519686] Dumping ftrace buffer: [ 111.523208] (ftrace buffer empty) [ 111.526891] Kernel Offset: disabled [ 111.530491] Rebooting in 86400 seconds..