[....] Starting periodic command scheduler: cron[?25l[?1c7[ ok 8[?25h[?0c. [....] Starting OpenBSD Secure Shell server: sshd[ 22.622930] random: sshd: uninitialized urandom read (32 bytes read) [?25l[?1c7[ ok 8[?25h[?0c. Debian GNU/Linux 7 syzkaller ttyS0 syzkaller login: [ 26.867134] random: sshd: uninitialized urandom read (32 bytes read) [ 27.167613] random: sshd: uninitialized urandom read (32 bytes read) [ 27.726935] random: sshd: uninitialized urandom read (32 bytes read) [ 34.855253] random: sshd: uninitialized urandom read (32 bytes read) Warning: Permanently added '10.128.0.24' (ECDSA) to the list of known hosts. [ 40.390089] random: sshd: uninitialized urandom read (32 bytes read) 2018/09/05 22:53:22 parsed 1 programs [ 41.650852] random: cc1: uninitialized urandom read (8 bytes read) 2018/09/05 22:53:24 executed programs: 0 [ 42.991835] IPVS: ftp: loaded support on port[0] = 21 [ 43.203497] bridge0: port 1(bridge_slave_0) entered blocking state [ 43.209993] bridge0: port 1(bridge_slave_0) entered disabled state [ 43.217484] device bridge_slave_0 entered promiscuous mode [ 43.234115] bridge0: port 2(bridge_slave_1) entered blocking state [ 43.240488] bridge0: port 2(bridge_slave_1) entered disabled state [ 43.247606] device bridge_slave_1 entered promiscuous mode [ 43.263574] IPv6: ADDRCONF(NETDEV_UP): veth0_to_bridge: link is not ready [ 43.280217] IPv6: ADDRCONF(NETDEV_UP): veth1_to_bridge: link is not ready [ 43.325361] bond0: Enslaving bond_slave_0 as an active interface with an up link [ 43.344239] bond0: Enslaving bond_slave_1 as an active interface with an up link [ 43.410279] IPv6: ADDRCONF(NETDEV_UP): team_slave_0: link is not ready [ 43.417556] team0: Port device team_slave_0 added [ 43.433553] IPv6: ADDRCONF(NETDEV_UP): team_slave_1: link is not ready [ 43.440822] team0: Port device team_slave_1 added [ 43.457250] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_0: link becomes ready [ 43.476119] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_1: link becomes ready [ 43.494799] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_bridge: link becomes ready [ 43.514248] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_bridge: link becomes ready [ 43.605070] ip (4739) used greatest stack depth: 16824 bytes left [ 43.648075] bridge0: port 2(bridge_slave_1) entered blocking state [ 43.654553] bridge0: port 2(bridge_slave_1) entered forwarding state [ 43.661660] bridge0: port 1(bridge_slave_0) entered blocking state [ 43.668057] bridge0: port 1(bridge_slave_0) entered forwarding state [ 44.123473] IPv6: ADDRCONF(NETDEV_UP): bond0: link is not ready [ 44.129592] 8021q: adding VLAN 0 to HW filter on device bond0 [ 44.157718] IPv6: ADDRCONF(NETDEV_CHANGE): bond0: link becomes ready [ 44.180246] IPv6: ADDRCONF(NETDEV_UP): veth0: link is not ready [ 44.225806] IPv6: ADDRCONF(NETDEV_UP): veth1: link is not ready [ 44.232197] IPv6: ADDRCONF(NETDEV_CHANGE): veth1: link becomes ready [ 44.241079] IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready [ 44.281234] 8021q: adding VLAN 0 to HW filter on device team0 [ 44.552703] 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. [ 44.586198] kasan: CONFIG_KASAN_INLINE enabled [ 44.590873] kasan: GPF could be caused by NULL-ptr deref or user memory access [ 44.598269] general protection fault: 0000 [#1] SMP KASAN [ 44.603801] CPU: 1 PID: 4912 Comm: syz-executor0 Not tainted 4.19.0-rc2+ #222 [ 44.611060] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 44.620425] RIP: 0010:kvm_pv_send_ipi+0x582/0xaf0 [ 44.625301] Code: e0 07 83 c0 01 88 85 97 fe ff ff e8 c8 1d 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 [ 44.644206] RSP: 0018:ffff8801d7d27028 EFLAGS: 00010206 [ 44.649565] RAX: 0000000000000620 RBX: ffff8801d7d27190 RCX: ffffffff8118b134 [ 44.656821] RDX: 0000000000000663 RSI: ffffffff8118b178 RDI: 0000000000003318 [ 44.664293] RBP: ffff8801d7d271b8 R08: ffff8801b6fd60c0 R09: ffffed003b6246de [ 44.671602] R10: ffffed003b6246de R11: ffff8801db1236f3 R12: 0000000000000000 [ 44.678925] R13: ffff8801d7d27110 R14: dffffc0000000000 R15: 0000000000000000 [ 44.686204] FS: 00007f24bb3f1700(0000) GS:ffff8801db100000(0000) knlGS:0000000000000000 [ 44.694417] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 44.700291] CR2: 0000000000000000 CR3: 00000001ca4a0000 CR4: 00000000001426e0 [ 44.707552] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 44.714806] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 44.722058] Call Trace: [ 44.724641] ? __lock_acquire+0x7fc/0x5020 [ 44.728873] ? kvm_apic_set_irq+0x170/0x170 [ 44.733183] ? __lock_is_held+0xb5/0x140 [ 44.737241] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 44.742765] ? vmx_read_guest_seg_ar+0x221/0x270 [ 44.747547] kvm_emulate_hypercall+0x9d7/0xea0 [ 44.752131] ? kvm_fast_pio+0x4f0/0x4f0 [ 44.756097] ? graph_lock+0x170/0x170 [ 44.759884] ? vmx_vcpu_run+0x13f9/0x277b [ 44.764015] ? vmx_vcpu_run+0x13ed/0x277b [ 44.768148] ? vmx_vcpu_run+0x13f9/0x277b [ 44.772284] ? vmx_vcpu_run+0x13ed/0x277b [ 44.776419] ? vmx_vcpu_run+0x13f9/0x277b [ 44.780555] ? vmx_vcpu_run+0x13ed/0x277b [ 44.784691] ? vmx_vcpu_run+0x13f9/0x277b [ 44.788822] ? vmx_vcpu_run+0x13ed/0x277b [ 44.792998] ? print_usage_bug+0xc0/0xc0 [ 44.797087] ? vmx_vcpu_run+0x13ed/0x277b [ 44.801288] ? __lock_is_held+0xb5/0x140 [ 44.805343] ? __vmx_complete_interrupts+0x103/0x3e0 [ 44.810439] handle_vmcall+0x15/0x20 [ 44.814136] ? handle_io+0x100/0x100 [ 44.817839] vmx_handle_exit+0x2dd/0x1760 [ 44.822012] ? lock_acquire+0x1e4/0x4f0 [ 44.825978] ? vcpu_enter_guest+0x1285/0x61a0 [ 44.830454] ? vcpu_enter_guest+0x1227/0x61a0 [ 44.834940] ? handle_vmfunc+0x9d0/0x9d0 [ 44.838988] ? trace_hardirqs_on+0xbd/0x2c0 [ 44.843303] ? kvm_arch_vcpu_ioctl_run+0x373/0x16d0 [ 44.848314] vcpu_enter_guest+0x143c/0x61a0 [ 44.852627] ? kvm_set_msr_common+0x2680/0x2680 [ 44.857282] ? vmx_vcpu_load+0xad2/0xfe0 [ 44.861335] ? handle_dr+0x8c0/0x8c0 [ 44.865045] ? graph_lock+0x170/0x170 [ 44.868834] ? __init_waitqueue_head+0x9e/0x150 [ 44.873491] ? __lock_is_held+0xb5/0x140 [ 44.877541] ? kvm_check_async_pf_completion+0x3a7/0x5c0 [ 44.882981] ? kvm_clear_async_pf_completion_queue+0x790/0x790 [ 44.888943] ? kvm_arch_dev_ioctl+0x610/0x610 [ 44.893433] ? preempt_notifier_dec+0x20/0x20 [ 44.897918] kvm_arch_vcpu_ioctl_run+0x373/0x16d0 [ 44.902762] ? kvm_arch_vcpu_ioctl_run+0x373/0x16d0 [ 44.907870] kvm_vcpu_ioctl+0x7b8/0x1280 [ 44.911955] ? kvm_uevent_notify_change.part.32+0x440/0x440 [ 44.917659] ? find_held_lock+0x36/0x1c0 [ 44.921727] ? lock_downgrade+0x8f0/0x8f0 [ 44.925875] ? kasan_check_read+0x11/0x20 [ 44.930014] ? rcu_is_watching+0x8c/0x150 [ 44.934146] ? rcu_cleanup_dead_rnp+0x200/0x200 [ 44.938806] ? __fget+0x4d5/0x740 [ 44.942250] ? ksys_dup3+0x690/0x690 [ 44.945995] ? kvm_uevent_notify_change.part.32+0x440/0x440 [ 44.951714] do_vfs_ioctl+0x1de/0x1720 [ 44.955592] ? ioctl_preallocate+0x300/0x300 [ 44.959984] ? __fget_light+0x2f7/0x440 [ 44.963943] ? __schedule+0x1df0/0x1df0 [ 44.967901] ? fget_raw+0x20/0x20 [ 44.971338] ? trace_hardirqs_off+0xb8/0x2b0 [ 44.975737] ? do_syscall_64+0x6be/0x820 [ 44.979825] ? trace_hardirqs_on+0x2c0/0x2c0 [ 44.984224] ? __x64_sys_futex+0x47f/0x6a0 [ 44.988446] ? do_syscall_64+0x9a/0x820 [ 44.992412] ? do_syscall_64+0x9a/0x820 [ 44.996376] ? lockdep_hardirqs_on+0x421/0x5c0 [ 45.001014] ? security_file_ioctl+0x94/0xc0 [ 45.005414] ksys_ioctl+0xa9/0xd0 [ 45.008853] __x64_sys_ioctl+0x73/0xb0 [ 45.012979] do_syscall_64+0x1b9/0x820 [ 45.016876] ? entry_SYSCALL_64_after_hwframe+0x3e/0xbe [ 45.022229] ? syscall_return_slowpath+0x5e0/0x5e0 [ 45.027144] ? trace_hardirqs_on_caller+0x2b0/0x2b0 [ 45.032147] ? prepare_exit_to_usermode+0x3b0/0x3b0 [ 45.037150] ? recalc_sigpending_tsk+0x180/0x180 [ 45.041892] ? kasan_check_write+0x14/0x20 [ 45.046160] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 45.050999] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 45.056172] RIP: 0033:0x457099 [ 45.059351] 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 [ 45.078407] RSP: 002b:00007f24bb3f0c78 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 [ 45.086145] RAX: ffffffffffffffda RBX: 00007f24bb3f16d4 RCX: 0000000000457099 [ 45.093411] RDX: 0000000000000000 RSI: 000000000000ae80 RDI: 0000000000000005 [ 45.100666] RBP: 00000000009301e0 R08: 0000000000000000 R09: 0000000000000000 [ 45.107929] R10: 0000000000000000 R11: 0000000000000246 R12: 00000000ffffffff [ 45.115179] R13: 00000000004cf730 R14: 00000000004c59b9 R15: 0000000000000002 [ 45.122435] Modules linked in: [ 45.125624] Dumping ftrace buffer: [ 45.129148] (ftrace buffer empty) [ 45.132864] ---[ end trace ecb54d6e1b522cad ]--- [ 45.137610] RIP: 0010:kvm_pv_send_ipi+0x582/0xaf0 [ 45.142438] Code: e0 07 83 c0 01 88 85 97 fe ff ff e8 c8 1d 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 [ 45.161443] RSP: 0018:ffff8801d7d27028 EFLAGS: 00010206 [ 45.166796] RAX: 0000000000000620 RBX: ffff8801d7d27190 RCX: ffffffff8118b134 [ 45.174053] RDX: 0000000000000663 RSI: ffffffff8118b178 RDI: 0000000000003318 [ 45.181318] RBP: ffff8801d7d271b8 R08: ffff8801b6fd60c0 R09: ffffed003b6246de [ 45.188622] R10: ffffed003b6246de R11: ffff8801db1236f3 R12: 0000000000000000 [ 45.195883] R13: ffff8801d7d27110 R14: dffffc0000000000 R15: 0000000000000000 [ 45.203139] FS: 00007f24bb3f1700(0000) GS:ffff8801db100000(0000) knlGS:0000000000000000 [ 45.211377] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 45.217255] CR2: 0000000000000000 CR3: 00000001ca4a0000 CR4: 00000000001426e0 [ 45.224522] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 45.231775] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 45.239143] Kernel panic - not syncing: Fatal exception [ 45.244863] Dumping ftrace buffer: [ 45.248397] (ftrace buffer empty) [ 45.252089] Kernel Offset: disabled [ 45.255700] Rebooting in 86400 seconds..