[....] Starting periodic command scheduler: cron[?25l[?1c7[ ok 8[?25h[?0c. [....] Starting OpenBSD Secure Shell server: sshd[ 60.536963] random: sshd: uninitialized urandom read (32 bytes read) [?25l[?1c7[ ok 8[?25h[?0c. Debian GNU/Linux 7 syzkaller ttyS0 syzkaller login: [ 65.588485] random: sshd: uninitialized urandom read (32 bytes read) [ 66.191462] random: sshd: uninitialized urandom read (32 bytes read) [ 67.851003] random: sshd: uninitialized urandom read (32 bytes read) [ 68.233520] random: sshd: uninitialized urandom read (32 bytes read) Warning: Permanently added '10.128.0.60' (ECDSA) to the list of known hosts. [ 74.146034] random: sshd: uninitialized urandom read (32 bytes read) executing program [ 74.429690] 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. [ 74.447381] ================================================================== [ 74.454769] BUG: KMSAN: uninit-value in vmx_set_constant_host_state+0x1778/0x1830 [ 74.462385] CPU: 1 PID: 6289 Comm: syz-executor132 Not tainted 4.19.0-rc4+ #65 [ 74.469736] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 74.479081] Call Trace: [ 74.481672] dump_stack+0x306/0x460 [ 74.485307] ? vmx_set_constant_host_state+0x1778/0x1830 [ 74.490783] kmsan_report+0x1a2/0x2e0 [ 74.494590] __msan_warning+0x7c/0xe0 [ 74.498392] vmx_set_constant_host_state+0x1778/0x1830 [ 74.503676] vmx_create_vcpu+0x3e6f/0x7870 [ 74.507920] ? kmsan_set_origin_inline+0x6b/0x120 [ 74.512762] ? __msan_poison_alloca+0x17a/0x210 [ 74.517439] ? vmx_vm_init+0x340/0x340 [ 74.521326] kvm_arch_vcpu_create+0x25d/0x2f0 [ 74.525824] kvm_vm_ioctl+0x13fd/0x33d0 [ 74.529802] ? __msan_poison_alloca+0x17a/0x210 [ 74.534488] ? kmsan_set_origin_inline+0x6b/0x120 [ 74.539330] ? do_vfs_ioctl+0x18a/0x2810 [ 74.543421] ? __se_sys_ioctl+0x1da/0x270 [ 74.547571] ? vcpu_stat_clear_per_vm+0x420/0x420 [ 74.552420] ? vcpu_stat_clear_per_vm+0x420/0x420 [ 74.557261] do_vfs_ioctl+0xcf3/0x2810 [ 74.561168] ? security_file_ioctl+0x92/0x200 [ 74.565672] __se_sys_ioctl+0x1da/0x270 [ 74.569650] __x64_sys_ioctl+0x4a/0x70 [ 74.573538] do_syscall_64+0xbe/0x100 [ 74.577340] entry_SYSCALL_64_after_hwframe+0x63/0xe7 [ 74.582520] RIP: 0033:0x440039 [ 74.585703] 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 [ 74.604603] RSP: 002b:00007fff2fb1a578 EFLAGS: 00000217 ORIG_RAX: 0000000000000010 [ 74.612327] RAX: ffffffffffffffda RBX: 00000000004002c8 RCX: 0000000000440039 [ 74.619591] RDX: 0000000000000000 RSI: 000000000000ae41 RDI: 0000000000000004 [ 74.626852] RBP: 00000000006ca018 R08: 00000000004002c8 R09: 00000000004002c8 [ 74.634111] R10: 0000000000000000 R11: 0000000000000217 R12: 00000000004018c0 [ 74.641378] R13: 0000000000401950 R14: 0000000000000000 R15: 0000000000000000 [ 74.648656] [ 74.650274] Local variable description: ----dt@vmx_set_constant_host_state [ 74.657270] Variable was created at: [ 74.661004] vmx_set_constant_host_state+0x2b0/0x1830 [ 74.666199] vmx_create_vcpu+0x3e6f/0x7870 [ 74.670418] ================================================================== [ 74.677775] Disabling lock debugging due to kernel taint [ 74.683235] Kernel panic - not syncing: panic_on_warn set ... [ 74.683235] [ 74.690599] CPU: 1 PID: 6289 Comm: syz-executor132 Tainted: G B 4.19.0-rc4+ #65 [ 74.699336] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 74.708679] Call Trace: [ 74.711269] dump_stack+0x306/0x460 [ 74.714911] panic+0x54c/0xafa [ 74.718128] ? __msan_metadata_ptr_for_store_1+0x13/0x20 [ 74.723596] kmsan_report+0x2d3/0x2e0 [ 74.727400] __msan_warning+0x7c/0xe0 [ 74.731204] vmx_set_constant_host_state+0x1778/0x1830 [ 74.736490] vmx_create_vcpu+0x3e6f/0x7870 [ 74.740723] ? kmsan_set_origin_inline+0x6b/0x120 [ 74.745564] ? __msan_poison_alloca+0x17a/0x210 [ 74.750248] ? vmx_vm_init+0x340/0x340 [ 74.754169] kvm_arch_vcpu_create+0x25d/0x2f0 [ 74.758668] kvm_vm_ioctl+0x13fd/0x33d0 [ 74.762648] ? __msan_poison_alloca+0x17a/0x210 [ 74.767311] ? kmsan_set_origin_inline+0x6b/0x120 [ 74.772185] ? do_vfs_ioctl+0x18a/0x2810 [ 74.776238] ? __se_sys_ioctl+0x1da/0x270 [ 74.780386] ? vcpu_stat_clear_per_vm+0x420/0x420 [ 74.785243] ? vcpu_stat_clear_per_vm+0x420/0x420 [ 74.790083] do_vfs_ioctl+0xcf3/0x2810 [ 74.793979] ? security_file_ioctl+0x92/0x200 [ 74.798499] __se_sys_ioctl+0x1da/0x270 [ 74.802480] __x64_sys_ioctl+0x4a/0x70 [ 74.806362] do_syscall_64+0xbe/0x100 [ 74.810168] entry_SYSCALL_64_after_hwframe+0x63/0xe7 [ 74.815353] RIP: 0033:0x440039 [ 74.818538] 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 [ 74.837437] RSP: 002b:00007fff2fb1a578 EFLAGS: 00000217 ORIG_RAX: 0000000000000010 [ 74.845148] RAX: ffffffffffffffda RBX: 00000000004002c8 RCX: 0000000000440039 [ 74.852412] RDX: 0000000000000000 RSI: 000000000000ae41 RDI: 0000000000000004 [ 74.859675] RBP: 00000000006ca018 R08: 00000000004002c8 R09: 00000000004002c8 [ 74.866937] R10: 0000000000000000 R11: 0000000000000217 R12: 00000000004018c0 [ 74.874212] R13: 0000000000401950 R14: 0000000000000000 R15: 0000000000000000 [ 74.882460] Kernel Offset: disabled [ 74.886100] Rebooting in 86400 seconds..