[....] Starting periodic command scheduler: cron[?25l[?1c7[ ok 8[?25h[?0c. [....] Starting OpenBSD Secure Shell server: sshd[ 22.997130] random: sshd: uninitialized urandom read (32 bytes read) [?25l[?1c7[ ok 8[?25h[?0c. Debian GNU/Linux 7 syzkaller ttyS0 syzkaller login: [ 26.833691] random: sshd: uninitialized urandom read (32 bytes read) [ 27.109172] random: sshd: uninitialized urandom read (32 bytes read) [ 27.647844] random: sshd: uninitialized urandom read (32 bytes read) [ 57.919764] random: sshd: uninitialized urandom read (32 bytes read) Warning: Permanently added '10.128.10.26' (ECDSA) to the list of known hosts. [ 63.477105] random: sshd: uninitialized urandom read (32 bytes read) 2018/08/31 23:47:50 parsed 1 programs [ 64.793608] random: cc1: uninitialized urandom read (8 bytes read) 2018/08/31 23:47:52 executed programs: 0 [ 66.379040] IPVS: ftp: loaded support on port[0] = 21 [ 66.593845] bridge0: port 1(bridge_slave_0) entered blocking state [ 66.600461] bridge0: port 1(bridge_slave_0) entered disabled state [ 66.607913] device bridge_slave_0 entered promiscuous mode [ 66.626357] bridge0: port 2(bridge_slave_1) entered blocking state [ 66.632787] bridge0: port 2(bridge_slave_1) entered disabled state [ 66.639867] device bridge_slave_1 entered promiscuous mode [ 66.655809] IPv6: ADDRCONF(NETDEV_UP): veth0_to_bridge: link is not ready [ 66.672030] IPv6: ADDRCONF(NETDEV_UP): veth1_to_bridge: link is not ready [ 66.715253] bond0: Enslaving bond_slave_0 as an active interface with an up link [ 66.733757] bond0: Enslaving bond_slave_1 as an active interface with an up link [ 66.801899] IPv6: ADDRCONF(NETDEV_UP): team_slave_0: link is not ready [ 66.809320] team0: Port device team_slave_0 added [ 66.824899] IPv6: ADDRCONF(NETDEV_UP): team_slave_1: link is not ready [ 66.831987] team0: Port device team_slave_1 added [ 66.847450] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_0: link becomes ready [ 66.864220] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_1: link becomes ready [ 66.882428] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_bridge: link becomes ready [ 66.899813] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_bridge: link becomes ready [ 67.030283] bridge0: port 2(bridge_slave_1) entered blocking state [ 67.036761] bridge0: port 2(bridge_slave_1) entered forwarding state [ 67.043652] bridge0: port 1(bridge_slave_0) entered blocking state [ 67.050107] bridge0: port 1(bridge_slave_0) entered forwarding state [ 67.516510] IPv6: ADDRCONF(NETDEV_UP): bond0: link is not ready [ 67.522647] 8021q: adding VLAN 0 to HW filter on device bond0 [ 67.569399] IPv6: ADDRCONF(NETDEV_UP): veth0: link is not ready [ 67.585033] IPv6: ADDRCONF(NETDEV_CHANGE): bond0: link becomes ready [ 67.624490] IPv6: ADDRCONF(NETDEV_UP): veth1: link is not ready [ 67.630666] IPv6: ADDRCONF(NETDEV_CHANGE): veth1: link becomes ready [ 67.638042] IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready [ 67.678657] 8021q: adding VLAN 0 to HW filter on device team0 [ 67.962465] 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. [ 68.352141] kasan: CONFIG_KASAN_INLINE enabled [ 68.357198] kasan: GPF could be caused by NULL-ptr deref or user memory access [ 68.364618] general protection fault: 0000 [#1] SMP KASAN [ 68.370159] CPU: 0 PID: 4944 Comm: syz-executor0 Not tainted 4.19.0-rc1+ #217 [ 68.377409] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 68.387236] RIP: 0010:kvm_pv_send_ipi+0x3ba/0xaf0 [ 68.392079] Code: e0 07 83 c0 01 88 85 97 fe ff ff e8 90 11 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 [ 68.411045] RSP: 0018:ffff8801cf5b7028 EFLAGS: 00010206 [ 68.416405] RAX: 0000000000000601 RBX: ffff8801cf5b7190 RCX: ffff8801cf5b711a [ 68.423771] RDX: 0000000000000644 RSI: ffffffff8118aef0 RDI: 0000000000003220 [ 68.431047] RBP: ffff8801cf5b71b8 R08: ffff8801ce9ba6c0 R09: ffffed003b6046de [ 68.438314] R10: ffffed003b6046de R11: ffff8801db0236f3 R12: 0000000000000000 [ 68.445573] R13: ffff8801cf5b7110 R14: dffffc0000000000 R15: 0000000000000000 [ 68.452835] FS: 00007fe74eb8d700(0000) GS:ffff8801db000000(0000) knlGS:0000000000000000 [ 68.461074] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 68.466957] CR2: 0000000000000000 CR3: 00000001c2949000 CR4: 00000000001426f0 [ 68.474211] Call Trace: [ 68.476788] ? __lock_acquire+0x7fc/0x5020 [ 68.481071] ? kvm_apic_set_irq+0x170/0x170 [ 68.485418] ? __lock_is_held+0xb5/0x140 [ 68.489465] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 68.495274] ? vmx_read_guest_seg_ar+0x221/0x270 [ 68.500026] kvm_emulate_hypercall+0x9d7/0xea0 [ 68.504598] ? kvm_fast_pio+0x4f0/0x4f0 [ 68.508677] ? graph_lock+0x170/0x170 [ 68.512476] ? vmx_vcpu_run+0x13f9/0x277b [ 68.516609] ? vmx_vcpu_run+0x13ed/0x277b [ 68.520738] ? vmx_vcpu_run+0x13f9/0x277b [ 68.524890] ? vmx_vcpu_run+0x13ed/0x277b [ 68.529021] ? vmx_vcpu_run+0x13f9/0x277b [ 68.533153] ? vmx_vcpu_run+0x13ed/0x277b [ 68.537283] ? vmx_vcpu_run+0x13f9/0x277b [ 68.541435] ? vmx_vcpu_run+0x13ed/0x277b [ 68.545568] ? print_usage_bug+0xc0/0xc0 [ 68.549616] ? vmx_vcpu_run+0x13ed/0x277b [ 68.553746] ? __lock_is_held+0xb5/0x140 [ 68.557809] ? __vmx_complete_interrupts+0x103/0x3e0 [ 68.562899] handle_vmcall+0x15/0x20 [ 68.566597] ? handle_io+0x100/0x100 [ 68.570322] vmx_handle_exit+0x2dd/0x1760 [ 68.574475] ? lock_acquire+0x1e4/0x4f0 [ 68.578668] ? vcpu_enter_guest+0x1285/0x61a0 [ 68.583257] ? vcpu_enter_guest+0x1227/0x61a0 [ 68.587742] ? handle_vmfunc+0x9d0/0x9d0 [ 68.591965] ? trace_hardirqs_on+0xbd/0x2c0 [ 68.596392] ? kvm_arch_vcpu_ioctl_run+0x373/0x16d0 [ 68.601398] vcpu_enter_guest+0x143c/0x61a0 [ 68.605703] ? kvm_set_msr_common+0x2680/0x2680 [ 68.610376] ? vmx_vcpu_load+0xad2/0xfe0 [ 68.614422] ? handle_dr+0x8c0/0x8c0 [ 68.618114] ? graph_lock+0x170/0x170 [ 68.621907] ? drop_futex_key_refs.isra.14+0x6d/0xe0 [ 68.626996] ? futex_wait+0x5d2/0xa20 [ 68.630788] ? __lock_is_held+0xb5/0x140 [ 68.634837] ? kvm_check_async_pf_completion+0x3a7/0x5c0 [ 68.640286] ? kvm_clear_async_pf_completion_queue+0x790/0x790 [ 68.646360] ? kvm_arch_dev_ioctl+0x610/0x610 [ 68.650861] ? preempt_notifier_dec+0x20/0x20 [ 68.655348] kvm_arch_vcpu_ioctl_run+0x373/0x16d0 [ 68.660307] ? kvm_arch_vcpu_ioctl_run+0x373/0x16d0 [ 68.665398] kvm_vcpu_ioctl+0x7b8/0x1280 [ 68.669449] ? kvm_uevent_notify_change.part.32+0x440/0x440 [ 68.675147] ? find_held_lock+0x36/0x1c0 [ 68.679197] ? lock_downgrade+0x8f0/0x8f0 [ 68.683335] ? kasan_check_read+0x11/0x20 [ 68.687467] ? rcu_is_watching+0x8c/0x150 [ 68.691602] ? rcu_cleanup_dead_rnp+0x200/0x200 [ 68.696432] ? __fget+0x4d5/0x740 [ 68.699869] ? ksys_dup3+0x690/0x690 [ 68.703582] ? kasan_check_write+0x14/0x20 [ 68.707907] ? _raw_spin_unlock_irqrestore+0x63/0xc0 [ 68.713002] ? kvm_uevent_notify_change.part.32+0x440/0x440 [ 68.718696] do_vfs_ioctl+0x1de/0x1720 [ 68.722568] ? rcu_is_watching+0x8c/0x150 [ 68.726702] ? trace_hardirqs_on+0xbd/0x2c0 [ 68.731007] ? ioctl_preallocate+0x300/0x300 [ 68.735397] ? __fget_light+0x2f7/0x440 [ 68.739359] ? fget_raw+0x20/0x20 [ 68.742805] ? putname+0xf2/0x130 [ 68.746247] ? rcu_read_lock_sched_held+0x108/0x120 [ 68.751246] ? kmem_cache_free+0x246/0x280 [ 68.755468] ? __x64_sys_futex+0x47f/0x6a0 [ 68.759687] ? do_syscall_64+0x9a/0x820 [ 68.763645] ? do_syscall_64+0x9a/0x820 [ 68.767604] ? lockdep_hardirqs_on+0x421/0x5c0 [ 68.772295] ? security_file_ioctl+0x94/0xc0 [ 68.776696] ksys_ioctl+0xa9/0xd0 [ 68.780134] __x64_sys_ioctl+0x73/0xb0 [ 68.784014] do_syscall_64+0x1b9/0x820 [ 68.787897] ? entry_SYSCALL_64_after_hwframe+0x3e/0xbe [ 68.793247] ? syscall_return_slowpath+0x5e0/0x5e0 [ 68.798158] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 68.802982] ? trace_hardirqs_on_caller+0x2b0/0x2b0 [ 68.807981] ? prepare_exit_to_usermode+0x291/0x3b0 [ 68.812994] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 68.817832] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 68.823002] RIP: 0033:0x457099 [ 68.826177] 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 [ 68.845072] RSP: 002b:00007fe74eb8cc78 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 [ 68.852762] RAX: ffffffffffffffda RBX: 00007fe74eb8d6d4 RCX: 0000000000457099 [ 68.860019] RDX: 0000000000000000 RSI: 000000000000ae80 RDI: 0000000000000005 [ 68.867324] RBP: 00000000009300a0 R08: 0000000000000000 R09: 0000000000000000 [ 68.874580] R10: 0000000000000000 R11: 0000000000000246 R12: 00000000ffffffff [ 68.881830] R13: 00000000004cf460 R14: 00000000004c5786 R15: 0000000000000000 [ 68.889091] Modules linked in: [ 68.892262] Dumping ftrace buffer: [ 68.895776] (ftrace buffer empty) [ 68.899595] ---[ end trace 72e382762eb2ee34 ]--- [ 68.904412] RIP: 0010:kvm_pv_send_ipi+0x3ba/0xaf0 [ 68.909295] Code: e0 07 83 c0 01 88 85 97 fe ff ff e8 90 11 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 [ 68.928801] RSP: 0018:ffff8801cf5b7028 EFLAGS: 00010206 [ 68.934251] RAX: 0000000000000601 RBX: ffff8801cf5b7190 RCX: ffff8801cf5b711a [ 68.941542] RDX: 0000000000000644 RSI: ffffffff8118aef0 RDI: 0000000000003220 [ 68.948850] RBP: ffff8801cf5b71b8 R08: ffff8801ce9ba6c0 R09: ffffed003b6046de [ 68.956158] R10: ffffed003b6046de R11: ffff8801db0236f3 R12: 0000000000000000 [ 68.963479] R13: ffff8801cf5b7110 R14: dffffc0000000000 R15: 0000000000000000 [ 68.970767] FS: 00007fe74eb8d700(0000) GS:ffff8801db000000(0000) knlGS:0000000000000000 [ 68.979007] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 68.984907] CR2: 0000000000000000 CR3: 00000001c2949000 CR4: 00000000001426f0 [ 68.992195] Kernel panic - not syncing: Fatal exception [ 68.997910] Dumping ftrace buffer: [ 69.001432] (ftrace buffer empty) [ 69.005120] Kernel Offset: disabled [ 69.008724] Rebooting in 86400 seconds..