[....] Starting periodic command scheduler: cron[?25l[?1c7[ ok 8[?25h[?0c. [....] Starting OpenBSD Secure Shell server: sshd[ 22.478852] random: sshd: uninitialized urandom read (32 bytes read) [?25l[?1c7[ ok 8[?25h[?0c. Debian GNU/Linux 7 syzkaller ttyS0 syzkaller login: [ 25.442722] random: sshd: uninitialized urandom read (32 bytes read) [ 25.829583] random: sshd: uninitialized urandom read (32 bytes read) [ 26.439209] random: sshd: uninitialized urandom read (32 bytes read) [ 34.919976] random: sshd: uninitialized urandom read (32 bytes read) Warning: Permanently added '10.128.0.6' (ECDSA) to the list of known hosts. [ 40.571007] random: sshd: uninitialized urandom read (32 bytes read) 2018/09/05 22:51:17 parsed 1 programs [ 41.657343] random: cc1: uninitialized urandom read (8 bytes read) 2018/09/05 22:51:19 executed programs: 0 [ 42.854236] IPVS: ftp: loaded support on port[0] = 21 [ 43.066804] bridge0: port 1(bridge_slave_0) entered blocking state [ 43.073319] bridge0: port 1(bridge_slave_0) entered disabled state [ 43.080836] device bridge_slave_0 entered promiscuous mode [ 43.098018] bridge0: port 2(bridge_slave_1) entered blocking state [ 43.104414] bridge0: port 2(bridge_slave_1) entered disabled state [ 43.111450] device bridge_slave_1 entered promiscuous mode [ 43.128272] IPv6: ADDRCONF(NETDEV_UP): veth0_to_bridge: link is not ready [ 43.144626] IPv6: ADDRCONF(NETDEV_UP): veth1_to_bridge: link is not ready [ 43.187594] bond0: Enslaving bond_slave_0 as an active interface with an up link [ 43.205455] bond0: Enslaving bond_slave_1 as an active interface with an up link [ 43.270696] IPv6: ADDRCONF(NETDEV_UP): team_slave_0: link is not ready [ 43.278413] team0: Port device team_slave_0 added [ 43.294205] IPv6: ADDRCONF(NETDEV_UP): team_slave_1: link is not ready [ 43.301329] team0: Port device team_slave_1 added [ 43.316727] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_0: link becomes ready [ 43.333021] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_1: link becomes ready [ 43.349906] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_bridge: link becomes ready [ 43.367425] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_bridge: link becomes ready [ 43.490114] bridge0: port 2(bridge_slave_1) entered blocking state [ 43.496573] bridge0: port 2(bridge_slave_1) entered forwarding state [ 43.503367] bridge0: port 1(bridge_slave_0) entered blocking state [ 43.509765] bridge0: port 1(bridge_slave_0) entered forwarding state [ 43.943395] IPv6: ADDRCONF(NETDEV_UP): bond0: link is not ready [ 43.949516] 8021q: adding VLAN 0 to HW filter on device bond0 [ 43.995522] IPv6: ADDRCONF(NETDEV_UP): veth0: link is not ready [ 44.009424] IPv6: ADDRCONF(NETDEV_CHANGE): bond0: link becomes ready [ 44.047449] IPv6: ADDRCONF(NETDEV_UP): veth1: link is not ready [ 44.053625] IPv6: ADDRCONF(NETDEV_CHANGE): veth1: link becomes ready [ 44.060694] IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready [ 44.100516] 8021q: adding VLAN 0 to HW filter on device team0 [ 44.372102] 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. [ 44.678190] kasan: CONFIG_KASAN_INLINE enabled [ 44.682947] kasan: GPF could be caused by NULL-ptr deref or user memory access [ 44.690377] general protection fault: 0000 [#1] SMP KASAN [ 44.695909] CPU: 0 PID: 4981 Comm: syz-executor0 Not tainted 4.19.0-rc2-next-20180904+ #55 [ 44.704296] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 44.713645] RIP: 0010:kvm_pv_send_ipi+0x582/0xaf0 [ 44.718491] Code: e0 07 83 c0 01 88 85 97 fe ff ff e8 e8 24 64 00 8b 85 b0 fe ff ff 44 01 e0 48 98 49 8d bc c7 18 02 00 00 48 89 fa 48 c1 ea 03 <42> 80 3c 32 00 0f 85 ed 03 00 00 49 8b 84 c7 18 02 00 00 48 8d b8 [ 44.737377] RSP: 0018:ffff8801cae57028 EFLAGS: 00010206 [ 44.742730] RAX: 0000000000000620 RBX: ffff8801cae57190 RCX: ffffffff8118b144 [ 44.750009] RDX: 0000000000000663 RSI: ffffffff8118b188 RDI: 0000000000003318 [ 44.757296] RBP: ffff8801cae571b8 R08: ffff8801cb78c600 R09: ffffed003b6046de [ 44.764551] R10: ffffed003b6046de R11: ffff8801db0236f3 R12: 0000000000000000 [ 44.771803] R13: ffff8801cae57110 R14: dffffc0000000000 R15: 0000000000000000 [ 44.779059] FS: 00007feb0ac26700(0000) GS:ffff8801db000000(0000) knlGS:0000000000000000 [ 44.787265] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 44.793145] CR2: 0000000000000000 CR3: 00000001bf0aa000 CR4: 00000000001426f0 [ 44.800416] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 44.807669] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 44.814928] Call Trace: [ 44.817511] ? __lock_acquire+0x7fc/0x5020 [ 44.821744] ? kvm_apic_set_irq+0x170/0x170 [ 44.826058] ? __lock_is_held+0xb5/0x140 [ 44.830110] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 44.835633] ? vmx_read_guest_seg_ar+0x221/0x270 [ 44.840393] kvm_emulate_hypercall+0x9d7/0xea0 [ 44.844990] ? kvm_fast_pio+0x4f0/0x4f0 [ 44.848962] ? graph_lock+0x170/0x170 [ 44.852754] ? vmx_vcpu_run+0x13f9/0x277b [ 44.856890] ? vmx_vcpu_run+0x13ed/0x277b [ 44.861021] ? vmx_vcpu_run+0x13f9/0x277b [ 44.865151] ? vmx_vcpu_run+0x13ed/0x277b [ 44.869280] ? vmx_vcpu_run+0x13f9/0x277b [ 44.873419] ? vmx_vcpu_run+0x13ed/0x277b [ 44.877574] ? vmx_vcpu_run+0x13f9/0x277b [ 44.881790] ? vmx_vcpu_run+0x13ed/0x277b [ 44.885919] ? print_usage_bug+0xc0/0xc0 [ 44.889969] ? vmx_vcpu_run+0x13ed/0x277b [ 44.894103] ? __lock_is_held+0xb5/0x140 [ 44.898160] ? __vmx_complete_interrupts+0x103/0x3e0 [ 44.903265] handle_vmcall+0x15/0x20 [ 44.906962] ? handle_io+0x100/0x100 [ 44.910659] vmx_handle_exit+0x2dd/0x1760 [ 44.914800] ? lock_acquire+0x1e4/0x4f0 [ 44.918773] ? vcpu_enter_guest+0x1285/0x61a0 [ 44.923254] ? vcpu_enter_guest+0x1227/0x61a0 [ 44.927740] ? handle_vmfunc+0x9d0/0x9d0 [ 44.931790] ? trace_hardirqs_on+0xbd/0x2c0 [ 44.936094] ? kvm_arch_vcpu_ioctl_run+0x373/0x16d0 [ 44.941099] vcpu_enter_guest+0x143c/0x61a0 [ 44.945418] ? kvm_set_msr_common+0x2680/0x2680 [ 44.950083] ? vmx_vcpu_load+0xad2/0xfe0 [ 44.954156] ? handle_dr+0x8c0/0x8c0 [ 44.957860] ? graph_lock+0x170/0x170 [ 44.961648] ? __init_waitqueue_head+0x9e/0x150 [ 44.966300] ? __lock_is_held+0xb5/0x140 [ 44.970348] ? kvm_check_async_pf_completion+0x3a7/0x5c0 [ 44.975784] ? kvm_clear_async_pf_completion_queue+0x790/0x790 [ 44.981750] ? kvm_arch_dev_ioctl+0x610/0x610 [ 44.986232] ? preempt_notifier_dec+0x20/0x20 [ 44.990718] kvm_arch_vcpu_ioctl_run+0x373/0x16d0 [ 44.995559] ? kvm_arch_vcpu_ioctl_run+0x373/0x16d0 [ 45.000575] kvm_vcpu_ioctl+0x7b8/0x1280 [ 45.004620] ? kvm_uevent_notify_change.part.32+0x440/0x440 [ 45.010330] ? find_held_lock+0x36/0x1c0 [ 45.014376] ? lock_downgrade+0x8f0/0x8f0 [ 45.018522] ? kasan_check_read+0x11/0x20 [ 45.022657] ? rcu_is_watching+0x8c/0x150 [ 45.026814] ? rcu_cleanup_dead_rnp+0x200/0x200 [ 45.031470] ? __fget+0x4d5/0x740 [ 45.034907] ? ksys_dup3+0x690/0x690 [ 45.038610] ? kvm_uevent_notify_change.part.32+0x440/0x440 [ 45.044305] do_vfs_ioctl+0x1de/0x1720 [ 45.048175] ? ioctl_preallocate+0x300/0x300 [ 45.052567] ? __fget_light+0x2f7/0x440 [ 45.056610] ? __schedule+0x1df0/0x1df0 [ 45.060568] ? fget_raw+0x20/0x20 [ 45.064010] ? trace_hardirqs_off+0xb8/0x2b0 [ 45.068402] ? do_syscall_64+0x6be/0x820 [ 45.072446] ? trace_hardirqs_on+0x2c0/0x2c0 [ 45.076841] ? __x64_sys_futex+0x47f/0x6a0 [ 45.081058] ? do_syscall_64+0x9a/0x820 [ 45.085029] ? do_syscall_64+0x9a/0x820 [ 45.088987] ? lockdep_hardirqs_on+0x421/0x5c0 [ 45.093555] ? security_file_ioctl+0x94/0xc0 [ 45.097951] ksys_ioctl+0xa9/0xd0 [ 45.101392] __x64_sys_ioctl+0x73/0xb0 [ 45.105287] do_syscall_64+0x1b9/0x820 [ 45.109164] ? entry_SYSCALL_64_after_hwframe+0x3e/0xbe [ 45.114617] ? syscall_return_slowpath+0x5e0/0x5e0 [ 45.119554] ? trace_hardirqs_on_caller+0x2b0/0x2b0 [ 45.124556] ? prepare_exit_to_usermode+0x3b0/0x3b0 [ 45.129558] ? recalc_sigpending_tsk+0x180/0x180 [ 45.134298] ? kasan_check_write+0x14/0x20 [ 45.138533] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 45.143364] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 45.148539] RIP: 0033:0x457099 [ 45.151727] 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 [ 45.170625] RSP: 002b:00007feb0ac25c78 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 [ 45.178316] RAX: ffffffffffffffda RBX: 00007feb0ac266d4 RCX: 0000000000457099 [ 45.185570] RDX: 0000000000000000 RSI: 000000000000ae80 RDI: 0000000000000005 [ 45.192822] RBP: 00000000009301e0 R08: 0000000000000000 R09: 0000000000000000 [ 45.200074] R10: 0000000000000000 R11: 0000000000000246 R12: 00000000ffffffff [ 45.207349] R13: 00000000004cf730 R14: 00000000004c59b9 R15: 0000000000000002 [ 45.214605] Modules linked in: [ 45.217783] Dumping ftrace buffer: [ 45.221319] (ftrace buffer empty) [ 45.225920] ---[ end trace eb9cef025b3714df ]--- [ 45.230755] RIP: 0010:kvm_pv_send_ipi+0x582/0xaf0 [ 45.235639] Code: e0 07 83 c0 01 88 85 97 fe ff ff e8 e8 24 64 00 8b 85 b0 fe ff ff 44 01 e0 48 98 49 8d bc c7 18 02 00 00 48 89 fa 48 c1 ea 03 <42> 80 3c 32 00 0f 85 ed 03 00 00 49 8b 84 c7 18 02 00 00 48 8d b8 [ 45.254574] RSP: 0018:ffff8801cae57028 EFLAGS: 00010206 [ 45.259966] RAX: 0000000000000620 RBX: ffff8801cae57190 RCX: ffffffff8118b144 [ 45.267261] RDX: 0000000000000663 RSI: ffffffff8118b188 RDI: 0000000000003318 [ 45.274548] RBP: ffff8801cae571b8 R08: ffff8801cb78c600 R09: ffffed003b6046de [ 45.281841] R10: ffffed003b6046de R11: ffff8801db0236f3 R12: 0000000000000000 [ 45.289131] R13: ffff8801cae57110 R14: dffffc0000000000 R15: 0000000000000000 [ 45.296429] FS: 00007feb0ac26700(0000) GS:ffff8801db000000(0000) knlGS:0000000000000000 [ 45.304688] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 45.310592] CR2: 0000000000000000 CR3: 00000001bf0aa000 CR4: 00000000001426f0 [ 45.317883] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 45.325171] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 45.332467] Kernel panic - not syncing: Fatal exception [ 45.338215] Dumping ftrace buffer: [ 45.341772] (ftrace buffer empty) [ 45.345465] Kernel Offset: disabled [ 45.349071] Rebooting in 86400 seconds..