[ 32.297086] audit: type=1800 audit(1551032681.738:27): pid=7223 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="restorecond" dev="sda1" ino=2436 res=0 [ 32.297107] audit: type=1800 audit(1551032681.738:28): pid=7223 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="ssh" dev="sda1" ino=2417 res=0 [....] Starting periodic command scheduler: cron[?25l[?1c7[ ok 8[?25h[?0c. [....] Starting OpenBSD Secure Shell server: sshd[?25l[?1c7[ ok 8[?25h[?0c. [ 33.194843] audit: type=1800 audit(1551032682.688:29): pid=7223 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 [ 33.214488] audit: type=1800 audit(1551032682.688:30): pid=7223 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 '10.128.0.33' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 42.813730] INFO: trying to register non-static key. [ 42.818863] the code is fine but needs lockdep annotation. [ 42.824463] turning off the locking correctness validator. [ 42.830068] CPU: 0 PID: 7378 Comm: syz-executor058 Not tainted 5.0.0-rc7+ #85 [ 42.837406] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 42.846749] Call Trace: [ 42.849342] dump_stack+0x172/0x1f0 [ 42.852962] register_lock_class+0x1bdc/0x1bf0 [ 42.857529] ? __sanitizer_cov_trace_cmp4+0x16/0x20 [ 42.862537] ? bpf_prog_kallsyms_find+0x50/0x2c0 [ 42.867276] ? check_noncircular+0x20/0x20 [ 42.871501] ? is_bpf_text_address+0xd3/0x170 [ 42.875984] ? kernel_text_address+0x73/0xf0 [ 42.880387] __lock_acquire+0x11f/0x4700 [ 42.884432] ? check_noncircular+0x20/0x20 [ 42.888653] ? mark_held_locks+0x100/0x100 [ 42.892872] ? __lock_acquire+0x53b/0x4700 [ 42.897085] ? __lock_acquire+0x53b/0x4700 [ 42.901309] ? __lock_acquire+0x53b/0x4700 [ 42.905524] lock_acquire+0x16f/0x3f0 [ 42.909313] ? __flush_work+0x61a/0x840 [ 42.913266] __flush_work+0x640/0x840 [ 42.917059] ? __flush_work+0x61a/0x840 [ 42.921013] ? try_wait_for_completion+0x9a/0xd0 [ 42.925751] ? insert_work+0x3a0/0x3a0 [ 42.929618] ? mark_held_locks+0xb1/0x100 [ 42.933750] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 42.939359] ? refcount_sub_and_test_checked+0x161/0x1f0 [ 42.944803] ? refcount_inc_checked+0x70/0x70 [ 42.949295] ? rcu_lockdep_current_cpu_online+0xe3/0x130 [ 42.954728] ? __drm_atomic_helper_crtc_destroy_state+0xf3/0x340 [ 42.960856] flush_work+0x18/0x20 [ 42.964304] vkms_atomic_crtc_destroy_state+0x2d/0x40 [ 42.969477] drm_atomic_state_default_clear+0x37c/0xd60 [ 42.974837] drm_atomic_state_clear+0x9d/0xc0 [ 42.979324] __drm_atomic_state_free+0x3c/0xf0 [ 42.983890] drm_atomic_helper_set_config+0xe5/0x160 [ 42.988991] drm_mode_setcrtc+0x613/0x1490 [ 42.993325] ? mark_held_locks+0x100/0x100 [ 42.997545] ? drm_mode_getcrtc+0x870/0x870 [ 43.001849] ? drm_unbind_agp+0x20/0x20 [ 43.005861] ? find_held_lock+0x35/0x130 [ 43.009912] ? drm_unbind_agp+0x20/0x20 [ 43.013866] ? drm_lease_owner+0x45/0x60 [ 43.017906] ? drm_is_current_master+0x5c/0x140 [ 43.022555] drm_ioctl_kernel+0x23b/0x2e0 [ 43.026682] ? drm_mode_getcrtc+0x870/0x870 [ 43.030988] ? drm_setversion+0x8c0/0x8c0 [ 43.035170] ? __sanitizer_cov_trace_const_cmp8+0x18/0x20 [ 43.040699] ? _copy_from_user+0xdd/0x150 [ 43.044831] drm_ioctl+0x545/0xa50 [ 43.048355] ? drm_mode_getcrtc+0x870/0x870 [ 43.052759] ? drm_version+0x3d0/0x3d0 [ 43.056636] ? debug_check_no_obj_freed+0x200/0x464 [ 43.061637] ? trace_hardirqs_off+0x62/0x220 [ 43.066140] ? drm_version+0x3d0/0x3d0 [ 43.070008] do_vfs_ioctl+0xd6e/0x1390 [ 43.073876] ? ioctl_preallocate+0x210/0x210 [ 43.078263] ? putname+0xef/0x130 [ 43.081707] ? rcu_read_lock_sched_held+0x110/0x130 [ 43.086704] ? kmem_cache_free+0x225/0x260 [ 43.090918] ? putname+0xf4/0x130 [ 43.094354] ? do_sys_open+0x31d/0x5d0 [ 43.098226] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 43.103831] ? security_file_ioctl+0x93/0xc0 [ 43.108219] ksys_ioctl+0xab/0xd0 [ 43.111652] __x64_sys_ioctl+0x73/0xb0 [ 43.115528] do_syscall_64+0x103/0x610 [ 43.119399] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 43.124569] RIP: 0033:0x443de9 [ 43.127749] 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 7b d8 fb ff c3 66 2e 0f 1f 84 00 00 00 00 [ 43.146642] RSP: 002b:00007ffcc4767e38 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 [ 43.154330] RAX: ffffffffffffffda RBX: 00000000004002e0 RCX: 0000000000443de9 [ 43.161580] RDX: 0000000020000180 RSI: 0