[....] Starting periodic command scheduler: cron[?25l[?1c7[ ok 8[?25h[?0c. [....] Starting OpenBSD Secure Shell server: sshd[ 58.126592] random: sshd: uninitialized urandom read (32 bytes read) [?25l[?1c7[ 58.408480] random: sshd: uninitialized urandom read (32 bytes read) [ ok 8[?25h[?0c. [ 59.160590] random: sshd: uninitialized urandom read (32 bytes read) Debian GNU/Linux 7 syzkaller ttyS0 syzkaller login: [ 60.466511] random: sshd: uninitialized urandom read (32 bytes read) [ 60.841395] random: sshd: uninitialized urandom read (32 bytes read) Warning: Permanently added '10.128.0.83' (ECDSA) to the list of known hosts. [ 66.721388] random: sshd: uninitialized urandom read (32 bytes read) executing program [ 66.990122] 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. [ 67.008091] ================================================================== [ 67.015519] BUG: KMSAN: uninit-value in vmx_set_constant_host_state+0x1778/0x1830 [ 67.023135] CPU: 1 PID: 6203 Comm: syz-executor472 Not tainted 4.19.0-rc4+ #65 [ 67.030485] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 67.039830] Call Trace: [ 67.042422] dump_stack+0x306/0x460 [ 67.046068] ? vmx_set_constant_host_state+0x1778/0x1830 [ 67.051573] kmsan_report+0x1a2/0x2e0 [ 67.055392] __msan_warning+0x7c/0xe0 [ 67.059203] vmx_set_constant_host_state+0x1778/0x1830 [ 67.064484] vmx_create_vcpu+0x3e6f/0x7870 [ 67.068713] ? kmsan_set_origin_inline+0x6b/0x120 [ 67.073552] ? __msan_poison_alloca+0x17a/0x210 [ 67.078228] ? vmx_vm_init+0x340/0x340 [ 67.082132] kvm_arch_vcpu_create+0x25d/0x2f0 [ 67.086665] kvm_vm_ioctl+0x13fd/0x33d0 [ 67.090645] ? __msan_poison_alloca+0x17a/0x210 [ 67.095332] ? do_vfs_ioctl+0x18a/0x2810 [ 67.099416] ? __se_sys_ioctl+0x1da/0x270 [ 67.103562] ? vcpu_stat_clear_per_vm+0x420/0x420 [ 67.108401] ? vcpu_stat_clear_per_vm+0x420/0x420 [ 67.113242] do_vfs_ioctl+0xcf3/0x2810 [ 67.117141] ? security_file_ioctl+0x92/0x200 [ 67.121656] __se_sys_ioctl+0x1da/0x270 [ 67.125648] __x64_sys_ioctl+0x4a/0x70 [ 67.129530] do_syscall_64+0xbe/0x100 [ 67.133330] entry_SYSCALL_64_after_hwframe+0x63/0xe7 [ 67.138508] RIP: 0033:0x440039 [ 67.141715] Code: 18 89 d0 c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 00 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 fb 13 fc ff c3 66 2e 0f 1f 84 00 00 00 00 [ 67.160631] RSP: 002b:00007ffed4de39f8 EFLAGS: 00000217 ORIG_RAX: 0000000000000010 [ 67.168369] RAX: ffffffffffffffda RBX: 00000000004002c8 RCX: 0000000000440039 [ 67.175632] RDX: 0000000000000000 RSI: 000000000000ae41 RDI: 0000000000000004 [ 67.182897] RBP: 00000000006ca018 R08: 00000000004002c8 R09: 00000000004002c8 [ 67.190156] R10: 0000000000000000 R11: 0000000000000217 R12: 00000000004018c0 [ 67.197420] R13: 0000000000401950 R14: 0000000000000000 R15: 0000000000000000 [ 67.204694] [ 67.206308] Local variable description: ----dt@vmx_set_constant_host_state [ 67.213323] Variable was created at: [ 67.217036] vmx_set_constant_host_state+0x2b0/0x1830 [ 67.222222] vmx_create_vcpu+0x3e6f/0x7870 [ 67.226441] ================================================================== [ 67.233789] Disabling lock debugging due to kernel taint [ 67.239225] Kernel panic - not syncing: panic_on_warn set ... [ 67.239225] [ 67.246586] CPU: 1 PID: 6203 Comm: syz-executor472 Tainted: G B 4.19.0-rc4+ #65 [ 67.255328] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 67.264670] Call Trace: [ 67.267278] dump_stack+0x306/0x460 [ 67.270915] panic+0x54c/0xafa [ 67.274154] ? __msan_metadata_ptr_for_store_1+0x13/0x20 [ 67.279612] kmsan_report+0x2d3/0x2e0 [ 67.283415] __msan_warning+0x7c/0xe0 [ 67.287222] vmx_set_constant_host_state+0x1778/0x1830 [ 67.292504] vmx_create_vcpu+0x3e6f/0x7870 [ 67.296734] ? kmsan_set_origin_inline+0x6b/0x120 [ 67.301593] ? __msan_poison_alloca+0x17a/0x210 [ 67.306286] ? vmx_vm_init+0x340/0x340 [ 67.310166] kvm_arch_vcpu_create+0x25d/0x2f0 [ 67.314672] kvm_vm_ioctl+0x13fd/0x33d0 [ 67.318675] ? __msan_poison_alloca+0x17a/0x210 [ 67.323355] ? do_vfs_ioctl+0x18a/0x2810 [ 67.327412] ? __se_sys_ioctl+0x1da/0x270 [ 67.331575] ? vcpu_stat_clear_per_vm+0x420/0x420 [ 67.336430] ? vcpu_stat_clear_per_vm+0x420/0x420 [ 67.341287] do_vfs_ioctl+0xcf3/0x2810 [ 67.345194] ? security_file_ioctl+0x92/0x200 [ 67.349694] __se_sys_ioctl+0x1da/0x270 [ 67.353679] __x64_sys_ioctl+0x4a/0x70 [ 67.357561] do_syscall_64+0xbe/0x100 [ 67.361380] entry_SYSCALL_64_after_hwframe+0x63/0xe7 [ 67.366566] RIP: 0033:0x440039 [ 67.369766] Code: 18 89 d0 c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 00 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 fb 13 fc ff c3 66 2e 0f 1f 84 00 00 00 00 [ 67.388658] RSP: 002b:00007ffed4de39f8 EFLAGS: 00000217 ORIG_RAX: 0000000000000010 [ 67.396363] RAX: ffffffffffffffda RBX: 00000000004002c8 RCX: 0000000000440039 [ 67.403623] RDX: 0000000000000000 RSI: 000000000000ae41 RDI: 0000000000000004 [ 67.410884] RBP: 00000000006ca018 R08: 00000000004002c8 R09: 00000000004002c8 [ 67.418151] R10: 0000000000000000 R11: 0000000000000217 R12: 00000000004018c0 [ 67.425412] R13: 0000000000401950 R14: 0000000000000000 R15: 0000000000000000 [ 67.433589] Kernel Offset: disabled [ 67.437229] Rebooting in 86400 seconds..