[....] Starting periodic command scheduler: cron[?25l[?1c7[ ok 8[?25h[?0c. [....] Starting OpenBSD Secure Shell server: sshd[ 18.741118] random: sshd: uninitialized urandom read (32 bytes read) [?25l[?1c7[ ok 8[?25h[?0c. Debian GNU/Linux 7 syzkaller ttyS0 syzkaller login: [ 21.528623] random: sshd: uninitialized urandom read (32 bytes read) [ 21.993323] random: sshd: uninitialized urandom read (32 bytes read) [ 22.832419] random: sshd: uninitialized urandom read (32 bytes read) [ 153.593209] random: sshd: uninitialized urandom read (32 bytes read) Warning: Permanently added '10.128.10.30' (ECDSA) to the list of known hosts. [ 159.050144] random: sshd: uninitialized urandom read (32 bytes read) 2018/07/17 05:54:17 parsed 1 programs [ 160.065495] random: cc1: uninitialized urandom read (8 bytes read) 2018/07/17 05:54:19 executed programs: 0 [ 161.318539] IPVS: ftp: loaded support on port[0] = 21 [ 161.458017] kasan: CONFIG_KASAN_INLINE enabled [ 161.458553] BUG: unable to handle kernel paging request at ffffde00707d120c [ 161.462650] kasan: GPF could be caused by NULL-ptr deref or user memory access [ 161.469743] PGD 0 P4D 0 [ 161.479733] Oops: 0000 [#1] SMP KASAN [ 161.483516] CPU: 1 PID: 4544 Comm: syz-executor0 Not tainted 4.18.0-rc5+ #151 [ 161.490776] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 161.500128] RIP: 0010:cpuacct_charge+0x21e/0x5d0 [ 161.504854] Code: 9c 24 30 01 00 00 65 48 03 1d 96 fa a3 7e 48 63 85 70 ff ff ff 48 ba 00 00 00 00 00 fc ff df 48 8d 3c c3 48 89 f9 48 c1 e9 03 <80> 3c 11 00 0f 85 2f 03 00 00 49 8d bc 24 28 01 00 00 4c 8d 34 c5 [ 161.523967] RSP: 0018:ffff8801d8fef218 EFLAGS: 00010806 [ 161.529320] RAX: 0000000000000000 RBX: ffff100383e89060 RCX: 1fffe200707d120c [ 161.536654] RDX: dffffc0000000000 RSI: 0000000000000000 RDI: ffff100383e89060 [ 161.543900] RBP: ffff8801d8fef2b0 R08: ffffed003b5e46d7 R09: ffffed003b5e46d6 [ 161.551147] R10: 00000000000052f9 R11: ffff8801daf236b3 R12: ffff8801ac9c9a80 [ 161.558391] R13: ffff8801d899c900 R14: dffffc0000000000 R15: 1ffff1003b1fde45 [ 161.565649] FS: 00000000025ae940(0000) GS:ffff8801daf00000(0000) knlGS:0000000000000000 [ 161.573851] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 161.581537] CR2: ffffde00707d120c CR3: 00000001cf6fb000 CR4: 00000000001406e0 [ 161.588787] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 161.596032] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 161.603278] Call Trace: [ 161.605853] ? cpuacct_css_alloc+0x160/0x160 [ 161.610243] update_curr+0x389/0xc00 [ 161.613945] ? __account_cfs_rq_runtime+0x770/0x770 [ 161.618939] ? __lock_acquire+0x7fc/0x5020 [ 161.623159] ? print_usage_bug+0xc0/0xc0 [ 161.627202] ? print_usage_bug+0xc0/0xc0 [ 161.631241] dequeue_entity+0xd9/0x15e0 [ 161.635192] ? print_usage_bug+0xc0/0xc0 [ 161.639229] ? reweight_task+0x130/0x130 [ 161.643278] ? trace_hardirqs_on+0x10/0x10 [ 161.647490] ? ___ratelimit.cold.2+0x6b/0x6b [ 161.651876] ? trace_hardirqs_on+0x10/0x10 [ 161.656087] ? graph_lock+0x170/0x170 [ 161.659883] ? kasan_check_read+0x11/0x20 [ 161.664005] ? rcu_is_watching+0x8c/0x150 [ 161.668130] ? rcu_pm_notify+0xc0/0xc0 [ 161.672004] dequeue_task_fair+0xfd/0xa10 [ 161.676138] ? rcu_read_lock_sched_held+0x108/0x120 [ 161.681137] ? dequeue_entity+0x15e0/0x15e0 [ 161.685451] ? pvclock_read_flags+0x160/0x160 [ 161.689928] ? graph_lock+0x170/0x170 [ 161.693711] ? __lock_is_held+0xb5/0x140 [ 161.697753] ? kvm_clock_read+0x25/0x30 [ 161.701729] deactivate_task+0xf3/0x330 [ 161.705681] __schedule+0x9c9/0x1ed0 [ 161.709375] ? __sched_text_start+0x8/0x8 [ 161.713515] ? lock_downgrade+0x8f0/0x8f0 [ 161.717661] ? enqueue_hrtimer+0x18e/0x540 [ 161.721874] ? kasan_check_read+0x11/0x20 [ 161.726005] ? do_raw_spin_unlock+0xa7/0x2f0 [ 161.730395] ? do_raw_spin_trylock+0x1c0/0x1c0 [ 161.734958] ? _raw_spin_unlock_irqrestore+0x74/0xc0 [ 161.740042] ? trace_hardirqs_on_caller+0x421/0x5c0 [ 161.745035] ? trace_hardirqs_on+0xd/0x10 [ 161.749161] ? hrtimer_start_range_ns+0x69a/0xd20 [ 161.753981] schedule+0xfb/0x450 [ 161.757324] ? __schedule+0x1ed0/0x1ed0 [ 161.761276] ? debug_object_free+0x690/0x690 [ 161.765663] ? find_held_lock+0x36/0x1c0 [ 161.769796] do_nanosleep+0x20e/0x750 [ 161.773582] ? lock_downgrade+0x8f0/0x8f0 [ 161.777703] ? schedule_timeout_idle+0x90/0x90 [ 161.782349] ? lock_release+0xa30/0xa30 [ 161.786303] ? check_same_owner+0x340/0x340 [ 161.790609] ? kernel_wait4+0x2e0/0x3f0 [ 161.794571] ? memset+0x31/0x40 [ 161.797830] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 161.803341] ? __hrtimer_init+0xdb/0x240 [ 161.807383] hrtimer_nanosleep+0x2d4/0x620 [ 161.811593] ? nanosleep_copyout+0x130/0x130 [ 161.815978] ? clock_was_set_work+0x30/0x30 [ 161.820277] __x64_sys_nanosleep+0x1e7/0x280 [ 161.824669] ? hrtimer_nanosleep+0x620/0x620 [ 161.829055] ? do_syscall_64+0x9a/0x820 [ 161.833016] do_syscall_64+0x1b9/0x820 [ 161.836880] ? syscall_return_slowpath+0x5e0/0x5e0 [ 161.841785] ? syscall_return_slowpath+0x31d/0x5e0 [ 161.846691] ? entry_SYSCALL_64_after_hwframe+0x59/0xbe [ 161.852040] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 161.856858] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 161.862023] RIP: 0033:0x4811c0 [ 161.865185] Code: 05 48 3d 01 f0 ff ff 0f 83 0d 03 f9 ff c3 66 2e 0f 1f 84 00 00 00 00 00 66 90 83 3d 91 52 5c 00 00 75 14 b8 23 00 00 00 0f 05 <48> 3d 01 f0 ff ff 0f 83 e4 02 f9 ff c3 48 83 ec 08 e8 6a 74 fd ff [ 161.884405] RSP: 002b:00007ffca6bd44f8 EFLAGS: 00000246 ORIG_RAX: 0000000000000023 [ 161.892089] RAX: ffffffffffffffda RBX: 00000000000276a2 RCX: 00000000004811c0 [ 161.899335] RDX: 0000000000000000 RSI: 0000000000000000 RDI: 00007ffca6bd4500 [ 161.906594] RBP: 0000000000000000 R08: 0000000000000001 R09: 00000000025ae940 [ 161.913840] R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000009 [ 161.921085] R13: 0000000000000012 R14: 00007ffca6bd4bc0 R15: 0000000000027690 [ 161.928334] Modules linked in: [ 161.931508] Dumping ftrace buffer: [ 161.935020] (ftrace buffer empty) [ 161.938705] CR2: ffffde00707d120c [ 161.942146] ---[ end trace 0254bc3b5c080e7f ]--- [ 161.942156] general protection fault: 0000 [#2] SMP KASAN [ 161.942168] CPU: 0 PID: 4561 Comm: syz-executor0 Tainted: G D 4.18.0-rc5+ #151 [ 161.946895] RIP: 0010:cpuacct_charge+0x21e/0x5d0 [ 161.946903] Code: [ 161.952446] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 161.961188] 9c [ 161.965931] RIP: 0010:cpuacct_account_field+0x17b/0x3b0 [ 161.968048] 24 [ 161.977384] Code: [ 161.979250] 30 [ 161.984588] 0f [ 161.986455] 01 [ 161.988581] 84 [ 161.990456] 00 [ 161.992334] 81 [ 161.994206] 00 [ 161.996073] 00 [ 161.997938] 65 [ 161.999805] 00 [ 162.001684] 48 [ 162.003552] 00 [ 162.005420] 03 [ 162.007288] 4c [ 162.009150] 1d 96 [ 162.011028] 63 [ 162.012904] fa [ 162.014771] ad [ 162.016901] a3 [ 162.018776] 74 [ 162.020636] 7e 48 [ 162.022530] ff [ 162.024397] 63 [ 162.026257] ff ff [ 162.028393] 85 [ 162.030268] 48 [ 162.032127] 70 [ 162.034253] b8 [ 162.036117] ff [ 162.037984] 00 [ 162.039848] ff [ 162.041712] 00 [ 162.043587] ff [ 162.045453] 00 [ 162.047326] 48 ba [ 162.049203] 00 [ 162.051068] 00 [ 162.052935] 00 [ 162.055061] 00 00 [ 162.056936] fc [ 162.058805] 00 [ 162.060670] ff [ 162.062796] 00 [ 162.064666] df [ 162.066533] fc [ 162.068397] 49 c1 [ 162.070272] ff [ 162.072141] e5 [ 162.074000] df 48 [ 162.076134] 03 49 [ 162.078011] 8d [ 162.079877] 8d [ 162.082001] 3c c3 [ 162.084148] bc [ 162.086015] 48 [ 162.087882] 24 [ 162.090013] 89 [ 162.091879] 38 01 [ 162.093757] f9 48 [ 162.095632] 00 [ 162.097500] c1 [ 162.099628] 00 [ 162.101757] e9 [ 162.103634] 48 [ 162.105500] 03 [ 162.107369] 89 [ 162.109238] <80> [ 162.111111] fa 48 [ 162.112980] 3c 11 [ 162.114858] c1 [ 162.116913] 00 [ 162.119049] ea [ 162.121181] 0f [ 162.123050] 03 [ 162.124915] 85 [ 162.126782] <80> [ 162.128649] 2f [ 162.130515] 3c [ 162.132380] 03 [ 162.134433] 02 [ 162.136298] 00 00 [ 162.138176] 00 0f [ 162.140056] 49 [ 162.141925] 85 [ 162.144052] 8d bc [ 162.146199] af 01 [ 162.148075] 24 [ 162.149936] 00 00 [ 162.152090] 28 [ 162.154218] 49 [ 162.156091] 01 00 [ 162.158230] 8b [ 162.160107] 00 [ 162.161984] 9c [ 162.164108] 4c 8d [ 162.165987] 24 [ 162.167875] 34 [ 162.169742] 38 [ 162.171870] c5 [ 162.173737] 01 [ 162.177473] 00 00 [ 162.179353] RSP: 0018:ffff8801d8fef218 EFLAGS: 00010806 [ 162.181216] 65 [ 162.188685] 48 [ 162.190552] RAX: 0000000000000000 RBX: ffff100383e89060 RCX: 1fffe200707d120c [ 162.190562] RDX: dffffc0000000000 RSI: 0000000000000000 RDI: ffff100383e89060 [ 162.192423] 03 1d [ 162.199688] RBP: ffff8801d8fef2b0 R08: ffffed003b5e46d7 R09: ffffed003b5e46d6 [ 162.209080] R10: 00000000000052f9 R11: ffff8801daf236b3 R12: ffff8801ac9c9a80 [ 162.216336] RSP: 0018:ffff8801dae078e8 EFLAGS: 00010806 [ 162.223588] R13: ffff8801d899c900 R14: dffffc0000000000 R15: 1ffff1003b1fde45 [ 162.228936] FS: 00000000025ae940(0000) GS:ffff8801daf00000(0000) knlGS:0000000000000000 [ 162.236199] RAX: dffffc0000000000 RBX: ffff8801dadfffff RCX: 0000000000000000 [ 162.236210] RDX: 1bd5a9d5a0000027 RSI: 0000000000000000 RDI: dead4ead00000138 [ 162.244432] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 162.251690] RBP: ffff8801dae07978 R08: ffffed003b5c46d7 R09: ffffed003b5c46d6 [ 162.251702] R10: ffffed003b5c46d6 R11: ffff8801dae236b3 R12: dead4ead00000000 [ 162.258962] CR2: ffffde00707d120c CR3: 00000001cf6fb000 CR4: 00000000001406e0 [ 162.264831] R13: 0000000000000010 R14: 1ffff1003b5c0f1e R15: 00000000000f4240 [ 162.272086] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 162.279358] FS: 00000000025ae940(0000) GS:ffff8801dae00000(0000) knlGS:0000000000000000 [ 162.286614] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 162.286624] Kernel panic - not syncing: Fatal exception [ 162.293887] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 162.327788] CR2: 00007fff0b361bbc CR3: 00000001d8ff1000 CR4: 00000000001406f0 [ 162.335046] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 162.342292] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 162.349542] Call Trace: [ 162.352118] [ 162.354260] ? cpuacct_charge+0x5d0/0x5d0 [ 162.358397] ? lock_downgrade+0x8f0/0x8f0 [ 162.362524] account_system_index_time+0x1dc/0x5c0 [ 162.367431] ? pvclock_read_flags+0x160/0x160 [ 162.371909] ? account_guest_time+0x460/0x460 [ 162.376384] ? kvm_clock_read+0x25/0x30 [ 162.380334] ? __sanitizer_cov_trace_cmp4+0x16/0x20 [ 162.385327] ? ktime_get+0x2e1/0x440 [ 162.389017] account_system_time+0x7f/0xb0 [ 162.393231] account_process_tick+0x76/0x240 [ 162.397617] update_process_times+0x21/0x70 [ 162.401915] tick_sched_handle+0x9f/0x180 [ 162.406050] tick_sched_timer+0x45/0x130 [ 162.410086] __hrtimer_run_queues+0x3eb/0x10c0 [ 162.414647] ? tick_sched_do_timer+0x1a0/0x1a0 [ 162.419206] ? hrtimer_start_range_ns+0xd20/0xd20 [ 162.424029] ? pvclock_read_flags+0x160/0x160 [ 162.428501] ? kvm_clock_read+0x25/0x30 [ 162.432452] ? kvm_clock_read+0x25/0x30 [ 162.436405] ? __sanitizer_cov_trace_cmp4+0x16/0x20 [ 162.441398] ? ktime_get_update_offsets_now+0x3db/0x5d0 [ 162.446742] ? do_timer+0x50/0x50 [ 162.450178] ? rcu_nmi_exit+0xe0/0x2d0 [ 162.454045] ? do_raw_spin_lock+0xc1/0x200 [ 162.458257] hrtimer_interrupt+0x2f3/0x750 [ 162.462493] smp_apic_timer_interrupt+0x165/0x730 [ 162.467313] ? smp_call_function_single_interrupt+0x660/0x660 [ 162.473177] ? _raw_spin_unlock+0x22/0x30 [ 162.477305] ? handle_edge_irq+0x330/0x870 [ 162.481518] ? task_prio+0x50/0x50 [ 162.485056] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 162.489874] apic_timer_interrupt+0xf/0x20 [ 162.494083] [ 162.496306] Modules linked in: [ 162.499489] Dumping ftrace buffer: [ 162.503011] (ftrace buffer empty) [ 162.506714] ---[ end trace 0254bc3b5c080e80 ]--- [ 162.511450] RIP: 0010:cpuacct_charge+0x21e/0x5d0 [ 162.516186] Code: 9c 24 30 01 00 00 65 48 03 1d 96 fa a3 7e 48 63 85 70 ff ff ff 48 ba 00 00 00 00 00 fc ff df 48 8d 3c c3 48 89 f9 48 c1 e9 03 <80> 3c 11 00 0f 85 2f 03 00 00 49 8d bc 24 28 01 00 00 4c 8d 34 c5 [ 162.535306] RSP: 0018:ffff8801d8fef218 EFLAGS: 00010806 [ 162.540649] RAX: 0000000000000000 RBX: ffff100383e89060 RCX: 1fffe200707d120c [ 162.547904] RDX: dffffc0000000000 RSI: 0000000000000000 RDI: ffff100383e89060 [ 162.555149] RBP: ffff8801d8fef2b0 R08: ffffed003b5e46d7 R09: ffffed003b5e46d6 [ 162.562511] R10: 00000000000052f9 R11: ffff8801daf236b3 R12: ffff8801ac9c9a80 [ 162.569853] R13: ffff8801d899c900 R14: dffffc0000000000 R15: 1ffff1003b1fde45 [ 162.577104] FS: 00000000025ae940(0000) GS:ffff8801dae00000(0000) knlGS:0000000000000000 [ 162.585305] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 162.591163] CR2: 00007fff0b361bbc CR3: 00000001d8ff1000 CR4: 00000000001406f0 [ 162.598410] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 162.605656] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 163.387328] Shutting down cpus with NMI [ 163.391804] Dumping ftrace buffer: [ 163.395334] (ftrace buffer empty) [ 163.399022] Kernel Offset: disabled [ 163.402637] Rebooting in 86400 seconds..