[....] Starting enhanced syslogd: rsyslogd[?25l[?1c7[ ok 8[?25h[?0c. [....] Starting periodic command scheduler: cron[?25l[?1c7[ ok 8[?25h[?0c. [....] Starting OpenBSD Secure Shell server: sshd[?25l[?1c7[ ok 8[?25h[?0c. [ 28.000683] kauditd_printk_skb: 8 callbacks suppressed [ 28.000695] audit: type=1800 audit(1544927987.612:29): pid=5882 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="rc.local" dev="sda1" ino=2432 res=0 [ 28.026642] audit: type=1800 audit(1544927987.612:30): pid=5882 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="rmnologin" dev="sda1" ino=2423 res=0 Debian GNU/Linux 7 syzkaller ttyS0 Warning: Permanently added '10.128.10.30' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 45.688036] 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. [ 45.714686] kasan: CONFIG_KASAN_INLINE enabled [ 45.719359] kasan: GPF could be caused by NULL-ptr deref or user memory access [ 45.727867] general protection fault: 0000 [#1] PREEMPT SMP KASAN [ 45.734103] CPU: 0 PID: 6040 Comm: syz-executor056 Not tainted 4.20.0-rc6+ #374 [ 45.741527] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 45.750870] RIP: 0010:kvm_arch_vcpu_ioctl_run+0x5296/0x7320 [ 45.756685] Code: 03 00 00 48 89 f8 48 c1 e8 03 42 80 3c 20 00 0f 85 b4 1e 00 00 49 8b 9f e0 03 00 00 48 8d bb 88 00 00 00 48 89 f8 48 c1 e8 03 <42> 80 3c 20 00 0f 85 8a 1e 00 00 48 8b 9b 88 00 00 00 48 8d bb d8 [ 45.775820] RSP: 0018:ffff8881c087f530 EFLAGS: 00010206 [ 45.781168] RAX: 0000000000000011 RBX: 0000000000000000 RCX: ffffffff8110198b [ 45.788443] RDX: 0000000000000000 RSI: ffffffff81103a68 RDI: 0000000000000088 [ 45.795694] RBP: ffff8881c087f8d0 R08: ffff8881b353e180 R09: 0000000000000008 [ 45.802947] R10: 0000000000000028 R11: ffffffff810feb0f R12: dffffc0000000000 [ 45.810197] R13: 0000000000000000 R14: ffffc90005debdb8 R15: ffff8881d2d30080 [ 45.817457] FS: 0000000000b99880(0000) GS:ffff8881dae00000(0000) knlGS:0000000000000000 [ 45.825664] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 45.831527] CR2: 0000000020000040 CR3: 00000001c0960000 CR4: 00000000001426f0 [ 45.838795] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 45.846044] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 45.853292] Call Trace: [ 45.855882] ? queue_delayed_work_on+0x14c/0x1f0 [ 45.860621] ? queue_delayed_work_on+0x14c/0x1f0 [ 45.865364] ? kvm_vcpu_ioctl+0x1e5/0x1150 [ 45.869583] ? lockdep_hardirqs_on+0x3bb/0x5b0 [ 45.874184] ? vmx_cpuid_update+0xd60/0xd60 [ 45.878514] ? kvm_arch_vcpu_runnable+0x710/0x710 [ 45.883344] ? zap_class+0x640/0x640 [ 45.887047] ? kvm_vcpu_ioctl+0x28c/0x1150 [ 45.891267] ? lock_downgrade+0x900/0x900 [ 45.895398] ? kvm_arch_vcpu_postcreate+0xdf/0x290 [ 45.900312] ? find_held_lock+0x36/0x1c0 [ 45.904359] ? get_task_pid+0x1ea/0x3b0 [ 45.908313] ? lock_downgrade+0x900/0x900 [ 45.912445] ? check_preemption_disabled+0x48/0x280 [ 45.917445] ? rcu_read_unlock_special+0x1c0/0x1c0 [ 45.922359] ? kasan_check_read+0x11/0x20 [ 45.926489] ? rcu_dynticks_curr_cpu_in_eqs+0xa2/0x170 [ 45.931750] ? rcu_softirq_qs+0x20/0x20 [ 45.935717] ? get_task_pid+0x211/0x3b0 [ 45.939684] ? find_get_pid+0x270/0x270 [ 45.943646] kvm_vcpu_ioctl+0x5c8/0x1150 [ 45.947691] ? kvm_vcpu_ioctl+0x5c8/0x1150 [ 45.951910] ? kvm_uevent_notify_change.part.32+0x450/0x450 [ 45.957608] ? is_bpf_text_address+0xd3/0x170 [ 45.962093] ? kernel_text_address+0x79/0xf0 [ 45.966495] ? __kernel_text_address+0xd/0x40 [ 45.971005] ? unwind_get_return_address+0x61/0xa0 [ 45.975917] ? __save_stack_trace+0x8d/0xf0 [ 45.980250] ? save_stack+0xa9/0xd0 [ 45.983860] ? save_stack+0x43/0xd0 [ 45.987475] ? __kasan_slab_free+0x102/0x150 [ 45.991868] ? kasan_slab_free+0xe/0x10 [ 45.995826] ? putname+0xf2/0x130 [ 45.999259] ? do_sys_open+0x54d/0x700 [ 46.003126] ? __x64_sys_openat+0x9d/0x100 [ 46.007342] ? do_syscall_64+0x1b9/0x820 [ 46.011387] ? entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 46.016742] ? trace_hardirqs_off+0xb8/0x310 [ 46.021138] ? kasan_check_read+0x11/0x20 [ 46.025273] ? do_raw_spin_unlock+0xa7/0x330 [ 46.029675] ? trace_hardirqs_on+0x310/0x310 [ 46.034076] ? trace_hardirqs_off+0xb8/0x310 [ 46.038467] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 46.043992] ? kvm_uevent_notify_change.part.32+0x450/0x450 [ 46.049691] do_vfs_ioctl+0x1de/0x1790 [ 46.053569] ? rcu_lockdep_current_cpu_online+0x1a4/0x210 [ 46.059090] ? ioctl_preallocate+0x300/0x300 [ 46.063479] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 46.068998] ? __fget_light+0x2e9/0x430 [ 46.073000] ? fget_raw+0x20/0x20 [ 46.076442] ? putname+0xf2/0x130 [ 46.079880] ? rcu_read_lock_sched_held+0x14f/0x180 [ 46.084879] ? kmem_cache_free+0x24f/0x290 [ 46.089093] ? putname+0xf7/0x130 [ 46.092529] ? do_syscall_64+0x9a/0x820 [ 46.096492] ? do_syscall_64+0x9a/0x820 [ 46.100450] ? lockdep_hardirqs_on+0x3bb/0x5b0 [ 46.105016] ? security_file_ioctl+0x94/0xc0 [ 46.109452] ksys_ioctl+0xa9/0xd0 [ 46.112922] __x64_sys_ioctl+0x73/0xb0 [ 46.116808] do_syscall_64+0x1b9/0x820 [ 46.120679] ? entry_SYSCALL_64_after_hwframe+0x3e/0xbe [ 46.126027] ? syscall_return_slowpath+0x5e0/0x5e0 [ 46.130943] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 46.135767] ? trace_hardirqs_on_caller+0x310/0x310 [ 46.140769] ? prepare_exit_to_usermode+0x3b0/0x3b0 [ 46.145771] ? prepare_exit_to_usermode+0x291/0x3b0 [ 46.150772] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 46.155596] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 46.160767] RIP: 0033:0x440859 [ 46.163956] 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 [ 46.182852] RSP: 002b:00007ffe705b8158 EFLAGS: 00000207 ORIG_RAX: 0000000000000010 [ 46.190554] RAX: ffffffffffffffda RBX: 00000000004002c8 RCX: 0000000000440859 [ 46.197821] RDX: 0000000000000000 RSI: 000000000000ae80 RDI: 0000000000000008 [ 46.205068] RBP: 00000000006ca018 R08: 00000000004002c8 R09: 00000000004002c8 [ 46.212320] R10: 00000000004002c8 R11: 0000000000000207 R12: 00000000004020e0 [ 46.219568] R13: 0000000000402170 R14: 0000000000000000 R15: 0000000000000000 [ 46.226822] Modules linked in: [ 46.230891] ---[ end trace 0951390b1b7fc03d ]--- [ 46.235658] RIP: 0010:kvm_arch_vcpu_ioctl_run+0x5296/0x7320 [ 46.241620] Code: 03 00 00 48 89 f8 48 c1 e8 03 42 80 3c 20 00 0f 85 b4 1e 00 00 49 8b 9f e0 03 00 00 48 8d bb 88 00 00 00 48 89 f8 48 c1 e8 03 <42> 80 3c 20 00 0f 85 8a 1e 00 00 48 8b 9b 88 00 00 00 48 8d bb d8 [ 46.260664] RSP: 0018:ffff8881c087f530 EFLAGS: 00010206 [ 46.266036] RAX: 0000000000000011 RBX: 0000000000000000 RCX: ffffffff8110198b [ 46.273326] RDX: 0000000000000000 RSI: ffffffff81103a68 RDI: 0000000000000088 [ 46.280627] RBP: ffff8881c087f8d0 R08: ffff8881b353e180 R09: 0000000000000008 [ 46.287897] R10: 0000000000000028 R11: ffffffff810feb0f R12: dffffc0000000000 [ 46.295237] R13: 0000000000000000 R14: ffffc90005debdb8 R15: ffff8881d2d30080 [ 46.302536] FS: 0000000000b99880(0000) GS:ffff8881dae00000(0000) knlGS:0000000000000000 [ 46.310784] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 46.316665] CR2: 0000000020000040 CR3: 00000001c0960000 CR4: 00000000001426f0 [ 46.323972] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 46.331294] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 46.338543] Kernel panic - not syncing: Fatal exception [ 46.344921] Kernel Offset: disabled [ 46.348547] Rebooting in 86400 seconds..