[ 33.527487] audit: type=1800 audit(1551039236.678:27): pid=7348 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="restorecond" dev="sda1" ino=2436 res=0 [ 33.568569] audit: type=1800 audit(1551039236.678:28): pid=7348 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. [ 34.523256] audit: type=1800 audit(1551039237.718:29): pid=7348 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 [ 34.542720] audit: type=1800 audit(1551039237.718:30): pid=7348 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 '10.128.0.249' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 41.799801] INFO: trying to register non-static key. [ 41.804917] the code is fine but needs lockdep annotation. [ 41.810572] turning off the locking correctness validator. [ 41.816219] CPU: 1 PID: 7500 Comm: syz-executor271 Not tainted 5.0.0-rc7+ #87 [ 41.823472] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 41.832806] Call Trace: [ 41.835380] dump_stack+0x172/0x1f0 [ 41.838995] register_lock_class+0x1bdc/0x1bf0 [ 41.843663] ? __sanitizer_cov_trace_cmp4+0x16/0x20 [ 41.848669] ? bpf_prog_kallsyms_find+0x50/0x2c0 [ 41.853405] ? check_noncircular+0x20/0x20 [ 41.857620] ? is_bpf_text_address+0xd3/0x170 [ 41.862097] ? kernel_text_address+0x73/0xf0 [ 41.866489] __lock_acquire+0x11f/0x4700 [ 41.870550] ? check_noncircular+0x20/0x20 [ 41.874773] ? mark_held_locks+0x100/0x100 [ 41.878989] ? __lock_acquire+0x53b/0x4700 [ 41.883202] ? __lock_acquire+0x53b/0x4700 [ 41.887422] ? __lock_acquire+0x53b/0x4700 [ 41.891645] lock_acquire+0x16f/0x3f0 [ 41.895425] ? __flush_work+0x61a/0x840 [ 41.899380] __flush_work+0x640/0x840 [ 41.903161] ? __flush_work+0x61a/0x840 [ 41.907115] ? try_wait_for_completion+0x9a/0xd0 [ 41.911851] ? insert_work+0x3a0/0x3a0 [ 41.915718] ? mark_held_locks+0xb1/0x100 [ 41.919850] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 41.925370] ? refcount_sub_and_test_checked+0x161/0x1f0 [ 41.930802] ? refcount_inc_checked+0x70/0x70 [ 41.935280] ? rcu_lockdep_current_cpu_online+0xe3/0x130 [ 41.940712] ? __drm_atomic_helper_crtc_destroy_state+0xf3/0x340 [ 41.946853] flush_work+0x18/0x20 [ 41.950298] vkms_atomic_crtc_destroy_state+0x2d/0x40 [ 41.955468] drm_atomic_state_default_clear+0x37c/0xd60 [ 41.960811] drm_atomic_state_clear+0x9d/0xc0 [ 41.965284] __drm_atomic_state_free+0x3c/0xf0 [ 41.969849] drm_atomic_helper_set_config+0xe5/0x160 [ 41.974946] drm_mode_setcrtc+0x613/0x1490 [ 41.979161] ? mark_held_locks+0x100/0x100 [ 41.983379] ? drm_mode_getcrtc+0x870/0x870 [ 41.987716] ? drm_unbind_agp+0x20/0x20 [ 41.991764] ? find_held_lock+0x35/0x130 [ 41.995815] ? drm_unbind_agp+0x20/0x20 [ 41.999772] ? drm_lease_owner+0x45/0x60 [ 42.003816] ? drm_is_current_master+0x5c/0x140 [ 42.008464] drm_ioctl_kernel+0x23b/0x2e0 [ 42.012594] ? drm_mode_getcrtc+0x870/0x870 [ 42.016896] ? drm_setversion+0x8c0/0x8c0 [ 42.021202] ? __sanitizer_cov_trace_const_cmp8+0x18/0x20 [ 42.026730] ? _copy_from_user+0xdd/0x150 [ 42.030884] drm_ioctl+0x545/0xa50 [ 42.034422] ? drm_mode_getcrtc+0x870/0x870 [ 42.038730] ? drm_version+0x3d0/0x3d0 [ 42.042621] ? debug_check_no_obj_freed+0x200/0x464 [ 42.047647] ? trace_hardirqs_off+0x62/0x220 [ 42.052036] ? drm_version+0x3d0/0x3d0 [ 42.055917] do_vfs_ioctl+0xd6e/0x1390 [ 42.059794] ? ioctl_preallocate+0x210/0x210 [ 42.064199] ? putname+0xef/0x130 [ 42.067639] ? rcu_read_lock_sched_held+0x110/0x130 [ 42.072637] ? kmem_cache_free+0x225/0x260 [ 42.076853] ? putname+0xf4/0x130 [ 42.080288] ? do_sys_open+0x31d/0x5d0 [ 42.084159] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 42.089678] ? security_file_ioctl+0x93/0xc0 [ 42.094070] ksys_ioctl+0xab/0xd0 [ 42.097531] __x64_sys_ioctl+0x73/0xb0 [ 42.101402] do_syscall_64+0x103/0x610 [ 42.105272] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 42.110455] RIP: 0033:0x443de9 [ 42.113650] 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 [ 42.132533] RSP: 002b:00007ffc2e9f8188 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 [ 42.140219] RAX: ffffffffffffffda RBX: 00000000004002e0 RCX: 0000000000443de9 [ 42.147473] RDX: 0000000020000180 RSI: 000