[....] Starting OpenBSD Secure Shell server: sshd[ 25.744320] random: sshd: uninitialized urandom read (32 bytes read) [?25l[?1c7[ ok 8[?25h[?0c. Debian GNU/Linux 7 syzkaller ttyS0 syzkaller login: [ 28.951124] random: sshd: uninitialized urandom read (32 bytes read) [ 29.399357] random: sshd: uninitialized urandom read (32 bytes read) [ 30.018585] random: sshd: uninitialized urandom read (32 bytes read) [ 83.918031] random: sshd: uninitialized urandom read (32 bytes read) [ 84.068571] sshd (5332) used greatest stack depth: 16952 bytes left Warning: Permanently added '10.128.0.5' (ECDSA) to the list of known hosts. [ 89.473472] random: sshd: uninitialized urandom read (32 bytes read) 2018/09/12 00:26:33 parsed 1 programs [ 90.476498] random: cc1: uninitialized urandom read (8 bytes read) 2018/09/12 00:26:35 executed programs: 0 [ 91.723892] IPVS: ftp: loaded support on port[0] = 21 [ 91.836332] ip (5366) used greatest stack depth: 16648 bytes left [ 91.961789] bridge0: port 1(bridge_slave_0) entered blocking state [ 91.968529] bridge0: port 1(bridge_slave_0) entered disabled state [ 91.975807] device bridge_slave_0 entered promiscuous mode [ 91.993687] bridge0: port 2(bridge_slave_1) entered blocking state [ 92.000402] bridge0: port 2(bridge_slave_1) entered disabled state [ 92.007299] device bridge_slave_1 entered promiscuous mode [ 92.024315] IPv6: ADDRCONF(NETDEV_UP): veth0_to_bridge: link is not ready [ 92.042637] IPv6: ADDRCONF(NETDEV_UP): veth1_to_bridge: link is not ready [ 92.090480] bond0: Enslaving bond_slave_0 as an active interface with an up link [ 92.109839] bond0: Enslaving bond_slave_1 as an active interface with an up link [ 92.185089] IPv6: ADDRCONF(NETDEV_UP): team_slave_0: link is not ready [ 92.192443] team0: Port device team_slave_0 added [ 92.208858] IPv6: ADDRCONF(NETDEV_UP): team_slave_1: link is not ready [ 92.216310] team0: Port device team_slave_1 added [ 92.233651] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_0: link becomes ready [ 92.253698] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_1: link becomes ready [ 92.272366] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_bridge: link becomes ready [ 92.291227] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_bridge: link becomes ready [ 92.433964] bridge0: port 2(bridge_slave_1) entered blocking state [ 92.440426] bridge0: port 2(bridge_slave_1) entered forwarding state [ 92.447177] bridge0: port 1(bridge_slave_0) entered blocking state [ 92.453562] bridge0: port 1(bridge_slave_0) entered forwarding state [ 92.961183] 8021q: adding VLAN 0 to HW filter on device bond0 [ 93.011409] IPv6: ADDRCONF(NETDEV_UP): veth0: link is not ready [ 93.061920] IPv6: ADDRCONF(NETDEV_UP): veth1: link is not ready [ 93.068066] IPv6: ADDRCONF(NETDEV_CHANGE): veth1: link becomes ready [ 93.077542] IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready [ 93.124047] 8021q: adding VLAN 0 to HW filter on device team0 [ 93.435971] 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. [ 93.533482] kasan: CONFIG_KASAN_INLINE enabled [ 93.541850] kasan: GPF could be caused by NULL-ptr deref or user memory access [ 93.549229] general protection fault: 0000 [#1] PREEMPT SMP KASAN [ 93.555451] CPU: 0 PID: 5612 Comm: syz-executor0 Not tainted 4.19.0-rc3+ #8 [ 93.562670] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 93.572024] RIP: 0010:kvm_pv_send_ipi+0x364/0xdd0 [ 93.576856] 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 [ 93.595750] RSP: 0018:ffff8801b8607028 EFLAGS: 00010203 [ 93.601102] RAX: dffffc0000000000 RBX: 0000000000000000 RCX: 0000000000000014 [ 93.608356] RDX: 0000000000000002 RSI: ffffffff8118fc08 RDI: 0000000000000005 [ 93.615612] RBP: ffff8801b86071c8 R08: ffff8801cda9e140 R09: 1ffffffff12b43d5 [ 93.622864] R10: ffffed003b5c4732 R11: ffff8801dae23993 R12: ffff8801b86071a0 [ 93.630119] R13: 0000000000000001 R14: 0000000000000000 R15: ffff8801b8607120 [ 93.637375] FS: 00007f3c5d60b700(0000) GS:ffff8801dae00000(0000) knlGS:0000000000000000 [ 93.645634] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 93.651510] CR2: 00007f718d6d9000 CR3: 00000001c966e000 CR4: 00000000001426f0 [ 93.658770] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 93.666024] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 93.673273] Call Trace: [ 93.675853] ? __lock_is_held+0xb5/0x140 [ 93.679897] ? graph_lock+0x170/0x170 [ 93.683695] ? kvm_apic_set_irq+0x170/0x170 [ 93.688007] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 93.693527] ? check_preemption_disabled+0x48/0x200 [ 93.698525] ? check_preemption_disabled+0x48/0x200 [ 93.703526] ? __lock_is_held+0xb5/0x140 [ 93.707582] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 93.713111] ? vmx_read_guest_seg_ar+0x221/0x270 [ 93.717984] kvm_emulate_hypercall+0xa1a/0xf20 [ 93.722565] ? kvm_gen_update_masterclock+0x350/0x350 [ 93.727752] ? graph_lock+0x170/0x170 [ 93.731538] ? vmx_vcpu_run+0x135b/0x2700 [ 93.735667] ? vmx_vcpu_run+0x134f/0x2700 [ 93.739796] ? vmx_vcpu_run+0x135b/0x2700 [ 93.743929] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 93.749464] ? check_preemption_disabled+0x48/0x200 [ 93.754463] ? check_preemption_disabled+0x48/0x200 [ 93.759468] ? __lock_is_held+0xb5/0x140 [ 93.763522] handle_vmcall+0x15/0x20 [ 93.767231] ? handle_io+0x100/0x100 [ 93.770931] vmx_handle_exit+0x2f7/0x17e0 [ 93.775228] ? lock_acquire+0x1ed/0x520 [ 93.779213] ? vcpu_enter_guest+0x12f2/0x62e0 [ 93.783816] ? vcpu_enter_guest+0x1271/0x62e0 [ 93.788332] ? handle_vmfunc+0x9d0/0x9d0 [ 93.792382] ? trace_hardirqs_on+0xbd/0x310 [ 93.796692] ? kvm_arch_vcpu_ioctl_run+0x375/0x16e0 [ 93.801697] ? check_preemption_disabled+0x48/0x200 [ 93.806700] ? check_preemption_disabled+0x48/0x200 [ 93.811707] vcpu_enter_guest+0x14a9/0x62e0 [ 93.816018] ? __phys_addr+0xa6/0x120 [ 93.819825] ? __sanitizer_cov_trace_const_cmp1+0x1a/0x20 [ 93.825604] ? vmcs_load+0xd8/0x150 [ 93.829232] ? emulator_read_emulated+0x50/0x50 [ 93.833893] ? vmx_vcpu_load+0xb06/0x1030 [ 93.838028] ? vmx_write_tsc_offset+0x680/0x680 [ 93.842731] ? graph_lock+0x170/0x170 [ 93.846580] ? drop_futex_key_refs.isra.15+0x6d/0xe0 [ 93.851717] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 93.857243] ? check_preemption_disabled+0x48/0x200 [ 93.862244] ? check_preemption_disabled+0x48/0x200 [ 93.867247] ? __lock_is_held+0xb5/0x140 [ 93.871297] ? kvm_check_async_pf_completion+0x3ae/0x5c0 [ 93.876732] ? kvm_clear_async_pf_completion_queue+0x770/0x770 [ 93.882690] ? kvm_arch_dev_ioctl+0x630/0x630 [ 93.887173] ? preempt_notifier_dec+0x20/0x20 [ 93.891659] kvm_arch_vcpu_ioctl_run+0x375/0x16e0 [ 93.896490] ? kvm_arch_vcpu_ioctl_run+0x375/0x16e0 [ 93.901498] kvm_vcpu_ioctl+0x72b/0x1150 [ 93.905555] ? kvm_vcpu_block+0x1030/0x1030 [ 93.909865] ? find_held_lock+0x36/0x1c0 [ 93.913918] ? __fget+0x4aa/0x740 [ 93.917364] ? check_preemption_disabled+0x48/0x200 [ 93.922501] ? rcu_read_unlock_special.part.39+0x11f0/0x11f0 [ 93.928293] ? kasan_check_read+0x11/0x20 [ 93.932428] ? rcu_dynticks_curr_cpu_in_eqs+0x9f/0x160 [ 93.937692] ? rcu_bh_qs+0xc0/0xc0 [ 93.941224] ? __fget+0x4d1/0x740 [ 93.944664] ? ksys_dup3+0x680/0x680 [ 93.948380] ? fget_raw+0x20/0x20 [ 93.951822] ? kvm_vcpu_block+0x1030/0x1030 [ 93.956131] do_vfs_ioctl+0x1de/0x1720 [ 93.960161] ? lock_release+0x970/0x970 [ 93.964130] ? arch_local_save_flags+0x40/0x40 [ 93.968738] ? ioctl_preallocate+0x300/0x300 [ 93.973138] ? __fget_light+0x2e9/0x430 [ 93.977101] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 93.982627] ? smack_file_ioctl+0x210/0x3c0 [ 93.986930] ? fget_raw+0x20/0x20 [ 93.990402] ? smack_file_lock+0x2e0/0x2e0 [ 93.994623] ? mqueue_flush_file+0x110/0x110 [ 93.999024] ? __x64_sys_futex+0x47f/0x6a0 [ 94.003260] ? do_syscall_64+0x9a/0x820 [ 94.007332] ? do_syscall_64+0x9a/0x820 [ 94.011292] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 94.016821] ? security_file_ioctl+0x94/0xc0 [ 94.021226] ksys_ioctl+0xa9/0xd0 [ 94.024768] __x64_sys_ioctl+0x73/0xb0 [ 94.028642] do_syscall_64+0x1b9/0x820 [ 94.032518] ? entry_SYSCALL_64_after_hwframe+0x3e/0xbe [ 94.037865] ? syscall_return_slowpath+0x5e0/0x5e0 [ 94.042778] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 94.047608] ? trace_hardirqs_on_caller+0x310/0x310 [ 94.052614] ? prepare_exit_to_usermode+0x3b0/0x3b0 [ 94.057617] ? prepare_exit_to_usermode+0x291/0x3b0 [ 94.062623] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 94.067458] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 94.072636] RIP: 0033:0x4572d9 [ 94.075825] 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 [ 94.094722] RSP: 002b:00007f3c5d60ac78 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 [ 94.102416] RAX: ffffffffffffffda RBX: 00007f3c5d60b6d4 RCX: 00000000004572d9 [ 94.109672] RDX: 0000000000000000 RSI: 000000000000ae80 RDI: 0000000000000005 [ 94.116972] RBP: 00000000009300a0 R08: 0000000000000000 R09: 0000000000000000 [ 94.124234] R10: 0000000000000000 R11: 0000000000000246 R12: 00000000ffffffff [ 94.131487] R13: 00000000004cf9f0 R14: 00000000004c5c77 R15: 0000000000000000 [ 94.138742] Modules linked in: [ 94.141921] Dumping ftrace buffer: [ 94.145446] (ftrace buffer empty) [ 94.154254] ---[ end trace e0f27fb61eda5535 ]--- [ 94.159031] RIP: 0010:kvm_pv_send_ipi+0x364/0xdd0 [ 94.163903] 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 [ 94.183180] RSP: 0018:ffff8801b8607028 EFLAGS: 00010203 [ 94.188561] RAX: dffffc0000000000 RBX: 0000000000000000 RCX: 0000000000000014 [ 94.195857] RDX: 0000000000000002 RSI: ffffffff8118fc08 RDI: 0000000000000005 [ 94.203158] RBP: ffff8801b86071c8 R08: ffff8801cda9e140 R09: 1ffffffff12b43d5 [ 94.210449] R10: ffffed003b5c4732 R11: ffff8801dae23993 R12: ffff8801b86071a0 [ 94.217716] R13: 0000000000000001 R14: 0000000000000000 R15: ffff8801b8607120 [ 94.225044] FS: 00007f3c5d60b700(0000) GS:ffff8801dae00000(0000) knlGS:0000000000000000 [ 94.233297] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 94.239164] CR2: 00007f718d6d9000 CR3: 00000001c966e000 CR4: 00000000001426f0 [ 94.246461] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 94.253771] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 94.261515] Kernel panic - not syncing: Fatal exception [ 94.267224] Dumping ftrace buffer: [ 94.270747] (ftrace buffer empty) [ 94.275073] Kernel Offset: disabled [ 94.278704] Rebooting in 86400 seconds..