[....] Starting periodic command scheduler: cron[?25l[?1c7[ ok 8[?25h[?0c. [....] Starting OpenBSD Secure Shell server: sshd[ 24.193603] random: sshd: uninitialized urandom read (32 bytes read) [?25l[?1c7[ ok 8[?25h[?0c. Debian GNU/Linux 7 syzkaller ttyS0 syzkaller login: [ 29.089082] random: sshd: uninitialized urandom read (32 bytes read) [ 29.406871] random: sshd: uninitialized urandom read (32 bytes read) [ 29.972543] random: sshd: uninitialized urandom read (32 bytes read) [ 30.156790] random: sshd: uninitialized urandom read (32 bytes read) Warning: Permanently added '10.128.10.12' (ECDSA) to the list of known hosts. [ 35.685707] random: sshd: uninitialized urandom read (32 bytes read) 2018/08/31 10:33:30 parsed 1 programs [ 36.983385] random: cc1: uninitialized urandom read (8 bytes read) 2018/08/31 10:33:33 executed programs: 0 [ 38.408560] IPVS: ftp: loaded support on port[0] = 21 [ 38.636482] bridge0: port 1(bridge_slave_0) entered blocking state [ 38.642960] bridge0: port 1(bridge_slave_0) entered disabled state [ 38.650553] device bridge_slave_0 entered promiscuous mode [ 38.667896] bridge0: port 2(bridge_slave_1) entered blocking state [ 38.674272] bridge0: port 2(bridge_slave_1) entered disabled state [ 38.681527] device bridge_slave_1 entered promiscuous mode [ 38.698315] IPv6: ADDRCONF(NETDEV_UP): veth0_to_bridge: link is not ready [ 38.716244] IPv6: ADDRCONF(NETDEV_UP): veth1_to_bridge: link is not ready [ 38.762872] bond0: Enslaving bond_slave_0 as an active interface with an up link [ 38.782463] bond0: Enslaving bond_slave_1 as an active interface with an up link [ 38.852487] IPv6: ADDRCONF(NETDEV_UP): team_slave_0: link is not ready [ 38.859775] team0: Port device team_slave_0 added [ 38.876844] IPv6: ADDRCONF(NETDEV_UP): team_slave_1: link is not ready [ 38.884043] team0: Port device team_slave_1 added [ 38.900690] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_0: link becomes ready [ 38.919679] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_1: link becomes ready [ 38.938699] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_bridge: link becomes ready [ 38.957897] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_bridge: link becomes ready [ 39.092830] bridge0: port 2(bridge_slave_1) entered blocking state [ 39.099278] bridge0: port 2(bridge_slave_1) entered forwarding state [ 39.106271] bridge0: port 1(bridge_slave_0) entered blocking state [ 39.112662] bridge0: port 1(bridge_slave_0) entered forwarding state [ 39.600497] 8021q: adding VLAN 0 to HW filter on device bond0 [ 39.652433] IPv6: ADDRCONF(NETDEV_UP): veth0: link is not ready [ 39.701721] IPv6: ADDRCONF(NETDEV_UP): veth1: link is not ready [ 39.707910] IPv6: ADDRCONF(NETDEV_CHANGE): veth1: link becomes ready [ 39.716290] IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready [ 39.762464] 8021q: adding VLAN 0 to HW filter on device team0 [ 40.065022] 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. [ 41.688425] kasan: CONFIG_KASAN_INLINE enabled [ 41.693206] kasan: GPF could be caused by NULL-ptr deref or user memory access [ 41.700756] general protection fault: 0000 [#1] SMP KASAN [ 41.706308] CPU: 0 PID: 5051 Comm: syz-executor0 Not tainted 4.19.0-rc1-next-20180831+ #53 [ 41.714689] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 41.724035] RIP: 0010:kvm_pv_send_ipi+0x3ba/0xaf0 [ 41.728999] Code: e0 07 83 c0 01 88 85 97 fe ff ff e8 f0 18 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 7e 06 00 00 49 8b 84 c7 18 02 00 00 48 8d b8 [ 41.747911] RSP: 0018:ffff8801bb83f028 EFLAGS: 00010206 [ 41.753259] RAX: 0000000000000601 RBX: ffff8801bb83f190 RCX: ffff8801bb83f11a [ 41.760512] RDX: 0000000000000644 RSI: ffffffff8118af00 RDI: 0000000000003220 [ 41.767762] RBP: ffff8801bb83f1b8 R08: ffff8801bb6cc180 R09: ffffed003b6046de [ 41.775033] R10: ffffed003b6046de R11: ffff8801db0236f3 R12: 0000000000000000 [ 41.782284] R13: ffff8801bb83f110 R14: dffffc0000000000 R15: 0000000000000000 [ 41.789554] FS: 00007f28af621700(0000) GS:ffff8801db000000(0000) knlGS:0000000000000000 [ 41.797765] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 41.803634] CR2: 0000000000000000 CR3: 00000001bddb2000 CR4: 00000000001426f0 [ 41.810911] Call Trace: [ 41.813484] ? __lock_acquire+0x7fc/0x5020 [ 41.817711] ? kvm_apic_set_irq+0x170/0x170 [ 41.822033] ? __lock_is_held+0xb5/0x140 [ 41.826080] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 41.831643] ? vmx_read_guest_seg_ar+0x221/0x270 [ 41.836389] kvm_emulate_hypercall+0x9d7/0xea0 [ 41.840960] ? kvm_fast_pio+0x4f0/0x4f0 [ 41.844933] ? graph_lock+0x170/0x170 [ 41.848718] ? vmx_vcpu_run+0x13f9/0x277b [ 41.852848] ? vmx_vcpu_run+0x13ed/0x277b [ 41.856977] ? vmx_vcpu_run+0x13f9/0x277b [ 41.861114] ? vmx_vcpu_run+0x13ed/0x277b [ 41.865257] ? vmx_vcpu_run+0x13f9/0x277b [ 41.869417] ? vmx_vcpu_run+0x13ed/0x277b [ 41.873561] ? vmx_vcpu_run+0x13f9/0x277b [ 41.877728] ? vmx_vcpu_run+0x13ed/0x277b [ 41.881864] ? print_usage_bug+0xc0/0xc0 [ 41.885919] ? vmx_vcpu_run+0x13ed/0x277b [ 41.890065] ? __lock_is_held+0xb5/0x140 [ 41.894146] ? __vmx_complete_interrupts+0x103/0x3e0 [ 41.899243] handle_vmcall+0x15/0x20 [ 41.902941] ? handle_io+0x100/0x100 [ 41.906639] vmx_handle_exit+0x2dd/0x1760 [ 41.910772] ? lock_acquire+0x1e4/0x4f0 [ 41.914756] ? vcpu_enter_guest+0x1285/0x61a0 [ 41.919237] ? vcpu_enter_guest+0x1227/0x61a0 [ 41.923717] ? handle_vmfunc+0x9d0/0x9d0 [ 41.927764] ? trace_hardirqs_on+0xbd/0x2c0 [ 41.932068] ? kvm_arch_vcpu_ioctl_run+0x373/0x16d0 [ 41.937084] vcpu_enter_guest+0x143c/0x61a0 [ 41.941420] ? kvm_set_msr_common+0x2680/0x2680 [ 41.946075] ? vmx_vcpu_load+0xad2/0xfe0 [ 41.950132] ? handle_dr+0x8c0/0x8c0 [ 41.953845] ? graph_lock+0x170/0x170 [ 41.957647] ? drop_futex_key_refs.isra.14+0x6d/0xe0 [ 41.962733] ? futex_wait+0x5d2/0xa20 [ 41.966519] ? __lock_is_held+0xb5/0x140 [ 41.970567] ? kvm_check_async_pf_completion+0x3a7/0x5c0 [ 41.976006] ? kvm_clear_async_pf_completion_queue+0x790/0x790 [ 41.981978] ? kvm_arch_dev_ioctl+0x610/0x610 [ 41.986468] ? preempt_notifier_dec+0x20/0x20 [ 41.990957] kvm_arch_vcpu_ioctl_run+0x373/0x16d0 [ 41.995796] ? kvm_arch_vcpu_ioctl_run+0x373/0x16d0 [ 42.000802] kvm_vcpu_ioctl+0x7b8/0x1280 [ 42.004848] ? kvm_uevent_notify_change.part.32+0x440/0x440 [ 42.010541] ? find_held_lock+0x36/0x1c0 [ 42.014587] ? lock_downgrade+0x8f0/0x8f0 [ 42.018720] ? kasan_check_read+0x11/0x20 [ 42.022853] ? rcu_is_watching+0x8c/0x150 [ 42.026987] ? rcu_cleanup_dead_rnp+0x200/0x200 [ 42.031648] ? __fget+0x4d5/0x740 [ 42.035086] ? ksys_dup3+0x690/0x690 [ 42.038796] ? kasan_check_write+0x14/0x20 [ 42.043040] ? _raw_spin_unlock_irqrestore+0x63/0xc0 [ 42.048145] ? kvm_uevent_notify_change.part.32+0x440/0x440 [ 42.053851] do_vfs_ioctl+0x1de/0x1720 [ 42.057740] ? ioctl_preallocate+0x300/0x300 [ 42.062141] ? __fget_light+0x2f7/0x440 [ 42.066105] ? __schedule+0x1df0/0x1df0 [ 42.070077] ? fget_raw+0x20/0x20 [ 42.073519] ? trace_hardirqs_off+0xb8/0x2b0 [ 42.077912] ? kmem_cache_free+0x246/0x280 [ 42.082144] ? __x64_sys_futex+0x47f/0x6a0 [ 42.086380] ? do_syscall_64+0x9a/0x820 [ 42.090341] ? do_syscall_64+0x9a/0x820 [ 42.094300] ? lockdep_hardirqs_on+0x421/0x5c0 [ 42.098866] ? security_file_ioctl+0x94/0xc0 [ 42.103266] ksys_ioctl+0xa9/0xd0 [ 42.106707] __x64_sys_ioctl+0x73/0xb0 [ 42.110586] do_syscall_64+0x1b9/0x820 [ 42.114459] ? entry_SYSCALL_64_after_hwframe+0x3e/0xbe [ 42.119806] ? syscall_return_slowpath+0x5e0/0x5e0 [ 42.124738] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 42.129565] ? trace_hardirqs_on_caller+0x2b0/0x2b0 [ 42.134568] ? prepare_exit_to_usermode+0x3b0/0x3b0 [ 42.139564] ? prepare_exit_to_usermode+0x291/0x3b0 [ 42.144590] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 42.149453] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 42.154633] RIP: 0033:0x457099 [ 42.157810] 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 [ 42.176700] RSP: 002b:00007f28af620c78 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 [ 42.184415] RAX: ffffffffffffffda RBX: 00007f28af6216d4 RCX: 0000000000457099 [ 42.191679] RDX: 0000000000000000 RSI: 000000000000ae80 RDI: 0000000000000005 [ 42.198950] RBP: 00000000009300a0 R08: 0000000000000000 R09: 0000000000000000 [ 42.206201] R10: 0000000000000000 R11: 0000000000000246 R12: 00000000ffffffff [ 42.213452] R13: 00000000004cf460 R14: 00000000004c5786 R15: 0000000000000000 [ 42.220707] Modules linked in: [ 42.223888] Dumping ftrace buffer: [ 42.227406] (ftrace buffer empty) [ 42.231515] ---[ end trace 3171b2472c157c49 ]--- [ 42.236319] RIP: 0010:kvm_pv_send_ipi+0x3ba/0xaf0 [ 42.241199] Code: e0 07 83 c0 01 88 85 97 fe ff ff e8 f0 18 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 7e 06 00 00 49 8b 84 c7 18 02 00 00 48 8d b8 [ 42.260160] RSP: 0018:ffff8801bb83f028 EFLAGS: 00010206 [ 42.265555] RAX: 0000000000000601 RBX: ffff8801bb83f190 RCX: ffff8801bb83f11a [ 42.272838] RDX: 0000000000000644 RSI: ffffffff8118af00 RDI: 0000000000003220 [ 42.280133] RBP: ffff8801bb83f1b8 R08: ffff8801bb6cc180 R09: ffffed003b6046de [ 42.287418] R10: ffffed003b6046de R11: ffff8801db0236f3 R12: 0000000000000000 [ 42.294703] R13: ffff8801bb83f110 R14: dffffc0000000000 R15: 0000000000000000 [ 42.301989] FS: 00007f28af621700(0000) GS:ffff8801db000000(0000) knlGS:0000000000000000 [ 42.310232] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 42.316136] CR2: 0000000000000000 CR3: 00000001bddb2000 CR4: 00000000001426f0 [ 42.323437] Kernel panic - not syncing: Fatal exception [ 42.329115] Dumping ftrace buffer: [ 42.332646] (ftrace buffer empty) [ 42.336332] Kernel Offset: disabled [ 42.339936] Rebooting in 86400 seconds..