[....] Starting periodic command scheduler: cron[?25l[?1c7[ ok 8[?25h[?0c. [....] Starting OpenBSD Secure Shell server: sshd[ 26.136360] random: sshd: uninitialized urandom read (32 bytes read) [?25l[?1c7[ ok 8[?25h[?0c. Debian GNU/Linux 7 syzkaller ttyS0 syzkaller login: [ 29.976215] random: sshd: uninitialized urandom read (32 bytes read) [ 30.362542] random: sshd: uninitialized urandom read (32 bytes read) [ 30.980330] random: sshd: uninitialized urandom read (32 bytes read) [ 173.236188] random: sshd: uninitialized urandom read (32 bytes read) Warning: Permanently added '10.128.0.54' (ECDSA) to the list of known hosts. [ 178.960130] random: sshd: uninitialized urandom read (32 bytes read) 2018/09/11 09:07:56 parsed 1 programs [ 180.125742] random: cc1: uninitialized urandom read (8 bytes read) 2018/09/11 09:07:58 executed programs: 0 [ 181.905654] IPVS: ftp: loaded support on port[0] = 21 [ 182.156422] bridge0: port 1(bridge_slave_0) entered blocking state [ 182.163540] bridge0: port 1(bridge_slave_0) entered disabled state [ 182.170649] device bridge_slave_0 entered promiscuous mode [ 182.190225] bridge0: port 2(bridge_slave_1) entered blocking state [ 182.196763] bridge0: port 2(bridge_slave_1) entered disabled state [ 182.203930] device bridge_slave_1 entered promiscuous mode [ 182.222034] IPv6: ADDRCONF(NETDEV_UP): veth0_to_bridge: link is not ready [ 182.240185] IPv6: ADDRCONF(NETDEV_UP): veth1_to_bridge: link is not ready [ 182.290838] bond0: Enslaving bond_slave_0 as an active interface with an up link [ 182.311307] bond0: Enslaving bond_slave_1 as an active interface with an up link [ 182.388326] IPv6: ADDRCONF(NETDEV_UP): team_slave_0: link is not ready [ 182.396495] team0: Port device team_slave_0 added [ 182.413557] IPv6: ADDRCONF(NETDEV_UP): team_slave_1: link is not ready [ 182.420670] team0: Port device team_slave_1 added [ 182.437840] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_0: link becomes ready [ 182.460678] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_1: link becomes ready [ 182.479732] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_bridge: link becomes ready [ 182.500671] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_bridge: link becomes ready [ 182.601699] ip (5487) used greatest stack depth: 16360 bytes left [ 182.647164] bridge0: port 2(bridge_slave_1) entered blocking state [ 182.653668] bridge0: port 2(bridge_slave_1) entered forwarding state [ 182.660496] bridge0: port 1(bridge_slave_0) entered blocking state [ 182.666949] bridge0: port 1(bridge_slave_0) entered forwarding state [ 183.185442] 8021q: adding VLAN 0 to HW filter on device bond0 [ 183.238610] IPv6: ADDRCONF(NETDEV_UP): veth0: link is not ready [ 183.291275] IPv6: ADDRCONF(NETDEV_UP): veth1: link is not ready [ 183.297805] IPv6: ADDRCONF(NETDEV_CHANGE): veth1: link becomes ready [ 183.306065] IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready [ 183.353778] 8021q: adding VLAN 0 to HW filter on device team0 [ 183.680948] 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. [ 183.718660] kasan: CONFIG_KASAN_INLINE enabled [ 183.723931] kasan: GPF could be caused by NULL-ptr deref or user memory access [ 183.731298] general protection fault: 0000 [#1] PREEMPT SMP KASAN [ 183.737521] CPU: 0 PID: 5658 Comm: syz-executor0 Not tainted 4.19.0-rc3+ #231 [ 183.744777] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 183.754170] RIP: 0010:kvm_pv_send_ipi+0x364/0xdd0 [ 183.759010] 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 [ 183.777907] RSP: 0018:ffff8801b8de7028 EFLAGS: 00010203 [ 183.783321] RAX: dffffc0000000000 RBX: 0000000000000000 RCX: 0000000000000014 [ 183.790606] RDX: 0000000000000002 RSI: ffffffff8118fc08 RDI: 0000000000000005 [ 183.797863] RBP: ffff8801b8de71c8 R08: ffff8801cf47e040 R09: 1ffffffff12b43d5 [ 183.805120] R10: ffffed003b5c4732 R11: ffff8801dae23993 R12: ffff8801b8de71a0 [ 183.812376] R13: 0000000000000001 R14: 0000000000000000 R15: ffff8801b8de7120 [ 183.819779] FS: 00007f2bd6c51700(0000) GS:ffff8801dae00000(0000) knlGS:0000000000000000 [ 183.827999] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 183.833866] CR2: 00007f683e1fd000 CR3: 00000001c294f000 CR4: 00000000001426f0 [ 183.841123] Call Trace: [ 183.843700] ? __lock_is_held+0xb5/0x140 [ 183.847747] ? graph_lock+0x170/0x170 [ 183.851531] ? kvm_apic_set_irq+0x170/0x170 [ 183.855845] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 183.861366] ? check_preemption_disabled+0x48/0x200 [ 183.866366] ? check_preemption_disabled+0x48/0x200 [ 183.871423] ? __lock_is_held+0xb5/0x140 [ 183.875481] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 183.881007] ? vmx_read_guest_seg_ar+0x221/0x270 [ 183.885747] kvm_emulate_hypercall+0xa1a/0xf20 [ 183.890315] ? kvm_gen_update_masterclock+0x350/0x350 [ 183.895487] ? graph_lock+0x170/0x170 [ 183.899271] ? vmx_vcpu_run+0x135b/0x2700 [ 183.903413] ? vmx_vcpu_run+0x134f/0x2700 [ 183.907546] ? vmx_vcpu_run+0x135b/0x2700 [ 183.911701] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 183.917236] ? check_preemption_disabled+0x48/0x200 [ 183.922280] ? check_preemption_disabled+0x48/0x200 [ 183.927301] ? __lock_is_held+0xb5/0x140 [ 183.931358] handle_vmcall+0x15/0x20 [ 183.935056] ? handle_io+0x100/0x100 [ 183.938782] vmx_handle_exit+0x2f7/0x17e0 [ 183.942921] ? lock_acquire+0x1ed/0x520 [ 183.946889] ? vcpu_enter_guest+0x12f2/0x62e0 [ 183.951373] ? vcpu_enter_guest+0x1271/0x62e0 [ 183.955857] ? handle_vmfunc+0x9d0/0x9d0 [ 183.959956] ? trace_hardirqs_on+0xbd/0x310 [ 183.964273] ? kvm_arch_vcpu_ioctl_run+0x375/0x16e0 [ 183.969505] ? check_preemption_disabled+0x48/0x200 [ 183.974511] ? check_preemption_disabled+0x48/0x200 [ 183.979522] vcpu_enter_guest+0x14a9/0x62e0 [ 183.983841] ? __phys_addr+0xa6/0x120 [ 183.987683] ? emulator_read_emulated+0x50/0x50 [ 183.992351] ? check_preemption_disabled+0x48/0x200 [ 183.997367] ? vmx_vcpu_load+0xb06/0x1030 [ 184.001621] ? vmx_write_tsc_offset+0x680/0x680 [ 184.006284] ? graph_lock+0x170/0x170 [ 184.010077] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 184.015596] ? check_preemption_disabled+0x48/0x200 [ 184.020888] ? check_preemption_disabled+0x48/0x200 [ 184.025893] ? __lock_is_held+0xb5/0x140 [ 184.029942] ? kvm_check_async_pf_completion+0x3ae/0x5c0 [ 184.035374] ? kvm_clear_async_pf_completion_queue+0x770/0x770 [ 184.041329] ? kvm_arch_dev_ioctl+0x630/0x630 [ 184.045805] ? preempt_notifier_dec+0x20/0x20 [ 184.050289] kvm_arch_vcpu_ioctl_run+0x375/0x16e0 [ 184.055116] ? kvm_arch_vcpu_ioctl_run+0x375/0x16e0 [ 184.060121] kvm_vcpu_ioctl+0x72b/0x1150 [ 184.064165] ? kvm_vcpu_block+0x1030/0x1030 [ 184.068470] ? find_held_lock+0x36/0x1c0 [ 184.072522] ? __fget+0x4aa/0x740 [ 184.075968] ? check_preemption_disabled+0x48/0x200 [ 184.080970] ? rcu_read_unlock_special.part.39+0x11f0/0x11f0 [ 184.086751] ? kasan_check_read+0x11/0x20 [ 184.090881] ? rcu_dynticks_curr_cpu_in_eqs+0x9f/0x160 [ 184.096138] ? rcu_bh_qs+0xc0/0xc0 [ 184.099661] ? __fget+0x4d1/0x740 [ 184.103100] ? ksys_dup3+0x680/0x680 [ 184.106795] ? fget_raw+0x20/0x20 [ 184.110242] ? kvm_vcpu_block+0x1030/0x1030 [ 184.114558] do_vfs_ioctl+0x1de/0x1720 [ 184.118432] ? lock_release+0x970/0x970 [ 184.122401] ? arch_local_save_flags+0x40/0x40 [ 184.126966] ? ioctl_preallocate+0x300/0x300 [ 184.131357] ? __fget_light+0x2e9/0x430 [ 184.135315] ? fget_raw+0x20/0x20 [ 184.138750] ? mqueue_flush_file+0x110/0x110 [ 184.143143] ? __x64_sys_futex+0x47f/0x6a0 [ 184.147359] ? do_syscall_64+0x9a/0x820 [ 184.151336] ? do_syscall_64+0x9a/0x820 [ 184.155310] ? lockdep_hardirqs_on+0x421/0x5c0 [ 184.159890] ? security_file_ioctl+0x94/0xc0 [ 184.164296] ksys_ioctl+0xa9/0xd0 [ 184.167912] __x64_sys_ioctl+0x73/0xb0 [ 184.171794] do_syscall_64+0x1b9/0x820 [ 184.175700] ? entry_SYSCALL_64_after_hwframe+0x3e/0xbe [ 184.181062] ? syscall_return_slowpath+0x5e0/0x5e0 [ 184.185982] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 184.190831] ? trace_hardirqs_on_caller+0x310/0x310 [ 184.196017] ? prepare_exit_to_usermode+0x3b0/0x3b0 [ 184.201029] ? prepare_exit_to_usermode+0x291/0x3b0 [ 184.206042] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 184.210881] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 184.216066] RIP: 0033:0x4572a9 [ 184.219256] 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 [ 184.238153] RSP: 002b:00007f2bd6c50c78 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 [ 184.245877] RAX: ffffffffffffffda RBX: 00007f2bd6c516d4 RCX: 00000000004572a9 [ 184.253145] RDX: 0000000000000000 RSI: 000000000000ae80 RDI: 0000000000000005 [ 184.260434] RBP: 00000000009300a0 R08: 0000000000000000 R09: 0000000000000000 [ 184.267740] R10: 0000000000000000 R11: 0000000000000246 R12: 00000000ffffffff [ 184.275009] R13: 00000000004cf9b0 R14: 00000000004c5c37 R15: 0000000000000000 [ 184.282322] Modules linked in: [ 184.285527] Dumping ftrace buffer: [ 184.289084] (ftrace buffer empty) [ 184.298132] ---[ end trace cc9cbe00e1a3ea7a ]--- [ 184.302966] RIP: 0010:kvm_pv_send_ipi+0x364/0xdd0 [ 184.308537] 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 [ 184.327745] RSP: 0018:ffff8801b8de7028 EFLAGS: 00010203 [ 184.333321] RAX: dffffc0000000000 RBX: 0000000000000000 RCX: 0000000000000014 [ 184.340998] RDX: 0000000000000002 RSI: ffffffff8118fc08 RDI: 0000000000000005 [ 184.348342] RBP: ffff8801b8de71c8 R08: ffff8801cf47e040 R09: 1ffffffff12b43d5 [ 184.355646] R10: ffffed003b5c4732 R11: ffff8801dae23993 R12: ffff8801b8de71a0 [ 184.363115] R13: 0000000000000001 R14: 0000000000000000 R15: ffff8801b8de7120 [ 184.370532] FS: 00007f2bd6c51700(0000) GS:ffff8801dae00000(0000) knlGS:0000000000000000 [ 184.378849] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 184.384778] CR2: 00007f683e1fd000 CR3: 00000001c294f000 CR4: 00000000001426f0 [ 184.392052] Kernel panic - not syncing: Fatal exception [ 184.397833] Dumping ftrace buffer: [ 184.402750] (ftrace buffer empty) [ 184.407738] Kernel Offset: disabled [ 184.411384] Rebooting in 86400 seconds..