[....] 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. [ 66.455366][ T26] kauditd_printk_skb: 7 callbacks suppressed [ 66.455375][ T26] audit: type=1800 audit(1567640977.496:29): pid=9725 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 [ 66.488479][ T26] audit: type=1800 audit(1567640977.496:30): pid=9725 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 '10.128.0.139' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 76.305425][ T9874] L1TF CPU bug present and SMT on, data leak possible. See CVE-2018-3646 and https://www.kernel.org/doc/html/latest/admin-guide/hw-vuln/l1tf.html for details. [ 76.334162][ T9874] kvm [9874]: vcpu0, guest rIP: 0xcc Hyper-V uhandled wrmsr: 0x40000004 data 0x20 [ 76.343689][ T9874] kvm [9874]: vcpu0, guest rIP: 0xcc Hyper-V uhandled wrmsr: 0x40000004 data 0x40 [ 76.354358][ T9874] kvm [9874]: vcpu0, guest rIP: 0xcc Hyper-V uhandled wrmsr: 0x40000004 data 0x60 [ 76.363678][ T9874] kvm [9874]: vcpu0, guest rIP: 0xcc Hyper-V uhandled wrmsr: 0x40000004 data 0x80 [ 76.373125][ T9874] kvm [9874]: vcpu0, guest rIP: 0xcc Hyper-V uhandled wrmsr: 0x40000004 data 0x94 [ 76.383096][ T9874] kvm [9874]: vcpu0, guest rIP: 0xcc Hyper-V uhandled wrmsr: 0x40000004 data 0x48c [ 76.392537][ T9874] kvm [9874]: vcpu0, guest rIP: 0xcc Hyper-V uhandled wrmsr: 0x40000004 data 0x4ac [ 76.402216][ T9874] kvm [9874]: vcpu0, guest rIP: 0xcc Hyper-V uhandled wrmsr: 0x40000005 data 0x1520 [ 76.411896][ T9874] kvm [9874]: vcpu0, guest rIP: 0xcc Hyper-V uhandled wrmsr: 0x40000006 data 0x15d4 [ 76.421525][ T9874] kvm [9874]: vcpu0, guest rIP: 0xcc Hyper-V uhandled wrmsr: 0x40000007 data 0x15c4 [ 76.435098][ T9874] kasan: CONFIG_KASAN_INLINE enabled [ 76.440412][ T9874] kasan: GPF could be caused by NULL-ptr deref or user memory access [ 76.448549][ T9874] general protection fault: 0000 [#1] PREEMPT SMP KASAN [ 76.455943][ T9874] CPU: 0 PID: 9874 Comm: syz-executor929 Not tainted 5.3.0-rc7+ #0 [ 76.464080][ T9874] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 76.474350][ T9874] RIP: 0010:__apic_accept_irq+0x46/0xbc0 [ 76.480160][ T9874] Code: c0 44 89 45 d4 4c 89 4d c8 e8 96 db 5c 00 49 8d 86 98 00 00 00 48 89 c2 48 89 45 b8 48 b8 00 00 00 00 00 fc ff df 48 c1 ea 03 <80> 3c 02 00 0f 85 65 0a 00 00 4d 8b be 98 00 00 00 0f 1f 44 00 00 [ 76.500165][ T9874] RSP: 0018:ffff88809409f820 EFLAGS: 00010202 [ 76.506222][ T9874] RAX: dffffc0000000000 RBX: ffff88809409f958 RCX: 0000000000000000 [ 76.514185][ T9874] RDX: 0000000000000013 RSI: ffffffff811599ba RDI: 0000000000000000 [ 76.522579][ T9874] RBP: ffff88809409f878 R08: 0000000000000000 R09: 0000000000000000 [ 76.530549][ T9874] R10: fffff52000be8c70 R11: ffffc90005f46383 R12: 0000000000000000 [ 76.538531][ T9874] R13: 0000000000000000 R14: 0000000000000000 R15: ffff8880924faff0 [ 76.546777][ T9874] FS: 0000555555eec880(0000) GS:ffff8880ae800000(0000) knlGS:0000000000000000 [ 76.555785][ T9874] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 76.562437][ T9874] CR2: 0000000000000000 CR3: 00000000a191f000 CR4: 00000000001426f0 [ 76.570565][ T9874] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 76.578534][ T9874] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 76.586508][ T9874] Call Trace: [ 76.589815][ T9874] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 76.596055][ T9874] kvm_apic_set_irq+0x10b/0x170 [ 76.601067][ T9874] kvm_hv_process_stimers+0xd55/0x1a10 [ 76.606556][ T9874] ? kvm_hv_irq_routing_update+0x410/0x410 [ 76.612718][ T9874] ? lock_acquire+0x190/0x410 [ 76.617412][ T9874] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 76.623661][ T9874] ? __kasan_check_write+0x14/0x20 [ 76.628833][ T9874] vcpu_enter_guest+0x4d2/0x5e90 [ 76.633927][ T9874] ? mark_held_locks+0xf0/0xf0 [ 76.638789][ T9874] ? kvm_vcpu_ioctl+0x181/0xfd0 [ 76.643742][ T9874] ? handle_emulation_failure+0x4e0/0x4e0 [ 76.649450][ T9874] ? lock_acquire+0x190/0x410 [ 76.654236][ T9874] ? kvm_check_async_pf_completion+0x2d8/0x440 [ 76.660483][ T9874] kvm_arch_vcpu_ioctl_run+0x464/0x1750 [ 76.666017][ T9874] ? kvm_arch_vcpu_ioctl_run+0x464/0x1750 [ 76.671891][ T9874] kvm_vcpu_ioctl+0x4dc/0xfd0 [ 76.676584][ T9874] ? kvm_write_guest_cached+0x40/0x40 [ 76.682213][ T9874] ? tomoyo_path_number_perm+0x263/0x520 [ 76.688024][ T9874] ? tomoyo_execute_permission+0x4a0/0x4a0 [ 76.693831][ T9874] ? put_unused_fd+0x62/0x80 [ 76.698421][ T9874] ? rwlock_bug.part.0+0x90/0x90 [ 76.703555][ T9874] ? put_unused_fd+0x4f/0x80 [ 76.708318][ T9874] ? kvm_write_guest_cached+0x40/0x40 [ 76.713710][ T9874] do_vfs_ioctl+0xdb6/0x13e0 [ 76.718438][ T9874] ? ioctl_preallocate+0x210/0x210 [ 76.723749][ T9874] ? __sanitizer_cov_trace_cmp4+0x16/0x20 [ 76.729839][ T9874] ? __fget_light+0x1a9/0x230 [ 76.734700][ T9874] ? __sanitizer_cov_trace_const_cmp8+0x18/0x20 [ 76.741463][ T9874] ? tomoyo_file_ioctl+0x23/0x30 [ 76.746745][ T9874] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 76.752989][ T9874] ? security_file_ioctl+0x8d/0xc0 [ 76.758328][ T9874] ksys_ioctl+0xab/0xd0 [ 76.762559][ T9874] __x64_sys_ioctl+0x73/0xb0 [ 76.767474][ T9874] do_syscall_64+0xfd/0x6a0 [ 76.771976][ T9874] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 76.777862][ T9874] RIP: 0033:0x442a19 [ 76.782004][ T9874] 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 1b 0c fc ff c3 66 2e 0f 1f 84 00 00 00 00 [ 76.801951][ T9874] RSP: 002b:00007fffac367388 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 [ 76.810355][ T9874] RAX: ffffffffffffffda RBX: 00000000004002c8 RCX: 0000000000442a19 [ 76.818737][ T9874] RDX: 0000000000000000 RSI: 000000000000ae80 RDI: 0000000000000005 [ 76.826932][ T9874] RBP: 00000000006cd018 R08: 00000000004002c8 R09: 00000000004002c8 [ 76.834998][ T9874] R10: 00000000004002c8 R11: 0000000000000246 R12: 0000000000403ac0 [ 76.843042][ T9874] R13: 0000000000403b50 R14: 0000000000000000 R15: 0000000000000000 [ 76.851000][ T9874] Modules linked in: [ 76.855336][ T9874] ---[ end trace 940b719ed878406c ]--- [ 76.861370][ T9874] RIP: 0010:__apic_accept_irq+0x46/0xbc0 [ 76.867243][ T9874] Code: c0 44 89 45 d4 4c 89 4d c8 e8 96 db 5c 00 49 8d 86 98 00 00 00 48 89 c2 48 89 45 b8 48 b8 00 00 00 00 00 fc ff df 48 c1 ea 03 <80> 3c 02 00 0f 85 65 0a 00 00 4d 8b be 98 00 00 00 0f 1f 44 00 00 [ 76.887185][ T9874] RSP: 0018:ffff88809409f820 EFLAGS: 00010202 [ 76.893356][ T9874] RAX: dffffc0000000000 RBX: ffff88809409f958 RCX: 0000000000000000 [ 76.901449][ T9874] RDX: 0000000000000013 RSI: ffffffff811599ba RDI: 0000000000000000 [ 76.909881][ T9874] RBP: ffff88809409f878 R08: 0000000000000000 R09: 0000000000000000 [ 76.918527][ T9874] R10: fffff52000be8c70 R11: ffffc90005f46383 R12: 0000000000000000 [ 76.926647][ T9874] R13: 0000000000000000 R14: 0000000000000000 R15: ffff8880924faff0 [ 76.935883][ T9874] FS: 0000555555eec880(0000) GS:ffff8880ae800000(0000) knlGS:0000000000000000 [ 76.944908][ T9874] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 76.951499][ T9874] CR2: 0000000000000000 CR3: 00000000a191f000 CR4: 00000000001426f0 [ 76.959512][ T9874] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 76.967808][ T9874] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 76.975856][ T9874] Kernel panic - not syncing: Fatal exception [ 76.983612][ T9874] Kernel Offset: disabled [ 76.988085][ T9874] Rebooting in 86400 seconds..