[....] Starting periodic command scheduler: cron[?25l[?1c7[ ok 8[?25h[?0c. [....] Starting OpenBSD Secure Shell server: sshd[ 26.154429] random: sshd: uninitialized urandom read (32 bytes read) [?25l[?1c7[ ok 8[?25h[?0c. Debian GNU/Linux 7 syzkaller ttyS0 syzkaller login: [ 29.282332] random: sshd: uninitialized urandom read (32 bytes read) [ 29.609058] random: sshd: uninitialized urandom read (32 bytes read) [ 30.196615] random: sshd: uninitialized urandom read (32 bytes read) [ 85.705126] random: sshd: uninitialized urandom read (32 bytes read) Warning: Permanently added '10.128.0.12' (ECDSA) to the list of known hosts. [ 91.264002] random: sshd: uninitialized urandom read (32 bytes read) 2018/09/11 10:02:29 parsed 1 programs [ 92.331159] random: cc1: uninitialized urandom read (8 bytes read) 2018/09/11 10:02:31 executed programs: 0 [ 93.632520] IPVS: ftp: loaded support on port[0] = 21 [ 93.885175] bridge0: port 1(bridge_slave_0) entered blocking state [ 93.891976] bridge0: port 1(bridge_slave_0) entered disabled state [ 93.899301] device bridge_slave_0 entered promiscuous mode [ 93.917882] bridge0: port 2(bridge_slave_1) entered blocking state [ 93.924897] bridge0: port 2(bridge_slave_1) entered disabled state [ 93.931962] device bridge_slave_1 entered promiscuous mode [ 93.949799] IPv6: ADDRCONF(NETDEV_UP): veth0_to_bridge: link is not ready [ 93.968483] IPv6: ADDRCONF(NETDEV_UP): veth1_to_bridge: link is not ready [ 94.018038] bond0: Enslaving bond_slave_0 as an active interface with an up link [ 94.039138] bond0: Enslaving bond_slave_1 as an active interface with an up link [ 94.115618] IPv6: ADDRCONF(NETDEV_UP): team_slave_0: link is not ready [ 94.123127] team0: Port device team_slave_0 added [ 94.139985] IPv6: ADDRCONF(NETDEV_UP): team_slave_1: link is not ready [ 94.147206] team0: Port device team_slave_1 added [ 94.164412] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_0: link becomes ready [ 94.185804] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_1: link becomes ready [ 94.205485] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_bridge: link becomes ready [ 94.225898] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_bridge: link becomes ready [ 94.374635] bridge0: port 2(bridge_slave_1) entered blocking state [ 94.381086] bridge0: port 2(bridge_slave_1) entered forwarding state [ 94.388079] bridge0: port 1(bridge_slave_0) entered blocking state [ 94.394465] bridge0: port 1(bridge_slave_0) entered forwarding state [ 94.907069] 8021q: adding VLAN 0 to HW filter on device bond0 [ 94.957700] IPv6: ADDRCONF(NETDEV_UP): veth0: link is not ready [ 95.008407] IPv6: ADDRCONF(NETDEV_UP): veth1: link is not ready [ 95.014983] IPv6: ADDRCONF(NETDEV_CHANGE): veth1: link becomes ready [ 95.021954] IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready [ 95.072509] 8021q: adding VLAN 0 to HW filter on device team0 [ 95.388102] L1TF CPU bug present and SMT on, data leak possible. See CVE-2018-3646 and https://www.kernel.org/doc/html/latest/admin-guide/l1tf.html for details. [ 95.429295] kasan: CONFIG_KASAN_INLINE enabled [ 95.434934] kasan: GPF could be caused by NULL-ptr deref or user memory access [ 95.442295] general protection fault: 0000 [#1] PREEMPT SMP KASAN [ 95.448515] CPU: 1 PID: 5612 Comm: syz-executor0 Not tainted 4.19.0-rc3+ #231 [ 95.455779] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 95.465132] RIP: 0010:kvm_pv_send_ipi+0x364/0xdd0 [ 95.469974] Code: 45 84 ed 0f 84 da 07 00 00 e8 b8 d4 65 00 48 8d 4b 14 48 b8 00 00 00 00 00 fc ff df 48 89 ca 48 89 8d 70 fe ff ff 48 c1 ea 03 <0f> b6 14 02 48 89 c8 83 e0 07 83 c0 03 38 d0 7c 08 84 d2 0f 85 f5 [ 95.488990] RSP: 0018:ffff8801b900f028 EFLAGS: 00010203 [ 95.494346] RAX: dffffc0000000000 RBX: 0000000000000000 RCX: 0000000000000014 [ 95.501602] RDX: 0000000000000002 RSI: ffffffff8118fc08 RDI: 0000000000000005 [ 95.508964] RBP: ffff8801b900f1c8 R08: ffff8801d152c040 R09: 1ffffffff12b43d5 [ 95.516235] R10: ffffed003b5e4732 R11: ffff8801daf23993 R12: ffff8801b900f1a0 [ 95.523538] R13: 0000000000000001 R14: 0000000000000000 R15: ffff8801b900f120 [ 95.530821] FS: 00007f0ae6de4700(0000) GS:ffff8801daf00000(0000) knlGS:0000000000000000 [ 95.539162] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 95.545025] CR2: 00007f539d54f000 CR3: 00000001c9388000 CR4: 00000000001426e0 [ 95.552294] Call Trace: [ 95.554873] ? __lock_is_held+0xb5/0x140 [ 95.558923] ? graph_lock+0x170/0x170 [ 95.562717] ? kvm_apic_set_irq+0x170/0x170 [ 95.567095] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 95.572626] ? check_preemption_disabled+0x48/0x200 [ 95.577632] ? check_preemption_disabled+0x48/0x200 [ 95.582695] ? __lock_is_held+0xb5/0x140 [ 95.586748] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 95.592269] ? vmx_read_guest_seg_ar+0x221/0x270 [ 95.597014] kvm_emulate_hypercall+0xa1a/0xf20 [ 95.601583] ? kvm_gen_update_masterclock+0x350/0x350 [ 95.606762] ? graph_lock+0x170/0x170 [ 95.610549] ? vmx_vcpu_run+0x135b/0x2700 [ 95.614689] ? vmx_vcpu_run+0x134f/0x2700 [ 95.618879] ? vmx_vcpu_run+0x135b/0x2700 [ 95.623131] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 95.628656] ? check_preemption_disabled+0x48/0x200 [ 95.633660] ? check_preemption_disabled+0x48/0x200 [ 95.638723] ? __lock_is_held+0xb5/0x140 [ 95.642775] handle_vmcall+0x15/0x20 [ 95.646479] ? handle_io+0x100/0x100 [ 95.650192] vmx_handle_exit+0x2f7/0x17e0 [ 95.654321] ? lock_acquire+0x1ed/0x520 [ 95.658283] ? vcpu_enter_guest+0x12f2/0x62e0 [ 95.662761] ? vcpu_enter_guest+0x1271/0x62e0 [ 95.667245] ? handle_vmfunc+0x9d0/0x9d0 [ 95.671304] ? trace_hardirqs_on+0xbd/0x310 [ 95.675619] ? kvm_arch_vcpu_ioctl_run+0x375/0x16e0 [ 95.680624] ? check_preemption_disabled+0x48/0x200 [ 95.685626] ? check_preemption_disabled+0x48/0x200 [ 95.690633] vcpu_enter_guest+0x14a9/0x62e0 [ 95.695005] ? __phys_addr+0xa6/0x120 [ 95.698799] ? emulator_read_emulated+0x50/0x50 [ 95.703456] ? check_preemption_disabled+0x48/0x200 [ 95.708477] ? vmx_vcpu_load+0xb06/0x1030 [ 95.712626] ? vmx_write_tsc_offset+0x680/0x680 [ 95.717284] ? graph_lock+0x170/0x170 [ 95.721073] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 95.726598] ? check_preemption_disabled+0x48/0x200 [ 95.731603] ? check_preemption_disabled+0x48/0x200 [ 95.736612] ? __lock_is_held+0xb5/0x140 [ 95.740660] ? kvm_check_async_pf_completion+0x3ae/0x5c0 [ 95.746139] ? kvm_clear_async_pf_completion_queue+0x770/0x770 [ 95.752119] ? kvm_arch_dev_ioctl+0x630/0x630 [ 95.756606] ? preempt_notifier_dec+0x20/0x20 [ 95.761094] kvm_arch_vcpu_ioctl_run+0x375/0x16e0 [ 95.765923] ? kvm_arch_vcpu_ioctl_run+0x375/0x16e0 [ 95.770944] kvm_vcpu_ioctl+0x72b/0x1150 [ 95.775061] ? kvm_vcpu_block+0x1030/0x1030 [ 95.779376] ? find_held_lock+0x36/0x1c0 [ 95.783434] ? __fget+0x4aa/0x740 [ 95.787031] ? check_preemption_disabled+0x48/0x200 [ 95.792050] ? rcu_read_unlock_special.part.39+0x11f0/0x11f0 [ 95.797843] ? kasan_check_read+0x11/0x20 [ 95.801976] ? rcu_dynticks_curr_cpu_in_eqs+0x9f/0x160 [ 95.807243] ? rcu_bh_qs+0xc0/0xc0 [ 95.810785] ? __fget+0x4d1/0x740 [ 95.814223] ? ksys_dup3+0x680/0x680 [ 95.817921] ? fget_raw+0x20/0x20 [ 95.821362] ? kvm_vcpu_block+0x1030/0x1030 [ 95.825691] do_vfs_ioctl+0x1de/0x1720 [ 95.829565] ? lock_release+0x970/0x970 [ 95.833578] ? arch_local_save_flags+0x40/0x40 [ 95.838153] ? ioctl_preallocate+0x300/0x300 [ 95.842552] ? __fget_light+0x2e9/0x430 [ 95.846521] ? fget_raw+0x20/0x20 [ 95.849971] ? mqueue_flush_file+0x110/0x110 [ 95.854495] ? __x64_sys_futex+0x47f/0x6a0 [ 95.858724] ? do_syscall_64+0x9a/0x820 [ 95.862693] ? do_syscall_64+0x9a/0x820 [ 95.866690] ? lockdep_hardirqs_on+0x421/0x5c0 [ 95.871278] ? security_file_ioctl+0x94/0xc0 [ 95.875698] ksys_ioctl+0xa9/0xd0 [ 95.879142] __x64_sys_ioctl+0x73/0xb0 [ 95.883016] do_syscall_64+0x1b9/0x820 [ 95.886893] ? entry_SYSCALL_64_after_hwframe+0x3e/0xbe [ 95.892247] ? syscall_return_slowpath+0x5e0/0x5e0 [ 95.897164] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 95.902032] ? trace_hardirqs_on_caller+0x310/0x310 [ 95.907117] ? prepare_exit_to_usermode+0x3b0/0x3b0 [ 95.912234] ? prepare_exit_to_usermode+0x291/0x3b0 [ 95.917237] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 95.922086] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 95.927281] RIP: 0033:0x4572a9 [ 95.930544] Code: fd b4 fb ff c3 66 2e 0f 1f 84 00 00 00 00 00 66 90 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 0f 83 cb b4 fb ff c3 66 2e 0f 1f 84 00 00 00 00 [ 95.949437] RSP: 002b:00007f0ae6de3c78 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 [ 95.957136] RAX: ffffffffffffffda RBX: 00007f0ae6de46d4 RCX: 00000000004572a9 [ 95.964435] RDX: 0000000000000000 RSI: 000000000000ae80 RDI: 0000000000000005 [ 95.971707] RBP: 00000000009300a0 R08: 0000000000000000 R09: 0000000000000000 [ 95.978976] R10: 0000000000000000 R11: 0000000000000246 R12: 00000000ffffffff [ 95.986227] R13: 00000000004cf9b0 R14: 00000000004c5c37 R15: 0000000000000000 [ 95.993490] Modules linked in: [ 95.996680] Dumping ftrace buffer: [ 96.000197] (ftrace buffer empty) [ 96.005533] ---[ end trace 6c87391bf80d8129 ]--- [ 96.010303] RIP: 0010:kvm_pv_send_ipi+0x364/0xdd0 [ 96.015267] Code: 45 84 ed 0f 84 da 07 00 00 e8 b8 d4 65 00 48 8d 4b 14 48 b8 00 00 00 00 00 fc ff df 48 89 ca 48 89 8d 70 fe ff ff 48 c1 ea 03 <0f> b6 14 02 48 89 c8 83 e0 07 83 c0 03 38 d0 7c 08 84 d2 0f 85 f5 [ 96.034540] RSP: 0018:ffff8801b900f028 EFLAGS: 00010203 [ 96.039897] RAX: dffffc0000000000 RBX: 0000000000000000 RCX: 0000000000000014 [ 96.047214] RDX: 0000000000000002 RSI: ffffffff8118fc08 RDI: 0000000000000005 [ 96.054513] RBP: ffff8801b900f1c8 R08: ffff8801d152c040 R09: 1ffffffff12b43d5 [ 96.061780] R10: ffffed003b5e4732 R11: ffff8801daf23993 R12: ffff8801b900f1a0 [ 96.069223] R13: 0000000000000001 R14: 0000000000000000 R15: ffff8801b900f120 [ 96.076642] FS: 00007f0ae6de4700(0000) GS:ffff8801daf00000(0000) knlGS:0000000000000000 [ 96.084892] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 96.090801] CR2: 00007f539d54f000 CR3: 00000001c9388000 CR4: 00000000001426e0 [ 96.098145] Kernel panic - not syncing: Fatal exception [ 96.103801] Dumping ftrace buffer: [ 96.107323] (ftrace buffer empty) [ 96.111647] Kernel Offset: disabled [ 96.115268] Rebooting in 86400 seconds..