[ 35.985148] audit: type=1800 audit(1549757523.533:28): pid=7529 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. [ 36.763663] audit: type=1800 audit(1549757524.403:29): pid=7529 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 [ 36.783057] audit: type=1800 audit(1549757524.403:30): pid=7529 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="rmnologin" dev="sda1" ino=2423 res=0 [....] startpar: service(s) returned failure: ssh ...[?25l[?1c7[FAIL8[?25h[?0c failed! Debian GNU/Linux 7 syzkaller ttyS0 Warning: Permanently added '10.128.0.76' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 45.015170] INFO: trying to register non-static key. [ 45.020281] the code is fine but needs lockdep annotation. [ 45.025887] turning off the locking correctness validator. [ 45.031507] CPU: 0 PID: 7703 Comm: syz-executor853 Not tainted 5.0.0-rc5+ #64 [ 45.038751] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 45.048077] Call Trace: [ 45.050639] dump_stack+0x172/0x1f0 [ 45.054244] register_lock_class+0x1bdc/0x1bf0 [ 45.058799] ? __sanitizer_cov_trace_cmp4+0x16/0x20 [ 45.063792] ? bpf_prog_kallsyms_find+0x50/0x2c0 [ 45.068524] ? check_noncircular+0x20/0x20 [ 45.072738] ? is_bpf_text_address+0xd3/0x170 [ 45.077223] ? kernel_text_address+0x73/0xf0 [ 45.081607] __lock_acquire+0x11f/0x4700 [ 45.085666] ? check_noncircular+0x20/0x20 [ 45.089884] ? mark_held_locks+0x100/0x100 [ 45.094103] ? __lock_acquire+0x53b/0x4700 [ 45.098337] ? __lock_acquire+0x53b/0x4700 [ 45.102581] ? __lock_acquire+0x53b/0x4700 [ 45.106802] lock_acquire+0x16f/0x3f0 [ 45.110582] ? __flush_work+0x61a/0x840 [ 45.114536] __flush_work+0x640/0x840 [ 45.118313] ? __flush_work+0x61a/0x840 [ 45.122277] ? try_wait_for_completion+0x9a/0xd0 [ 45.127009] ? insert_work+0x3a0/0x3a0 [ 45.130892] ? mark_held_locks+0xb1/0x100 [ 45.135032] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 45.140545] ? refcount_sub_and_test_checked+0x161/0x1f0 [ 45.145970] ? refcount_inc_checked+0x70/0x70 [ 45.150444] ? rcu_lockdep_current_cpu_online+0xe3/0x130 [ 45.155876] ? __drm_atomic_helper_crtc_destroy_state+0xf3/0x340 [ 45.162005] flush_work+0x18/0x20 [ 45.165441] vkms_atomic_crtc_destroy_state+0x2d/0x40 [ 45.170627] drm_atomic_state_default_clear+0x37c/0xd60 [ 45.175987] drm_atomic_state_clear+0x9d/0xc0 [ 45.180476] __drm_atomic_state_free+0x3c/0xf0 [ 45.185038] drm_atomic_helper_set_config+0xe5/0x160 [ 45.190120] drm_mode_setcrtc+0x613/0x1490 [ 45.194333] ? mark_held_locks+0x100/0x100 [ 45.198548] ? drm_mode_getcrtc+0x870/0x870 [ 45.202848] ? drm_unbind_agp+0x20/0x20 [ 45.206799] ? find_held_lock+0x35/0x130 [ 45.210833] ? drm_unbind_agp+0x20/0x20 [ 45.214786] ? drm_lease_owner+0x45/0x60 [ 45.218827] ? drm_is_current_master+0x5c/0x140 [ 45.223476] drm_ioctl_kernel+0x23b/0x2e0 [ 45.227603] ? drm_mode_getcrtc+0x870/0x870 [ 45.231909] ? drm_setversion+0x8c0/0x8c0 [ 45.236042] ? __sanitizer_cov_trace_const_cmp8+0x18/0x20 [ 45.241559] ? _copy_from_user+0xdd/0x150 [ 45.245935] drm_ioctl+0x545/0xa50 [ 45.249456] ? drm_mode_getcrtc+0x870/0x870 [ 45.253755] ? drm_version+0x3d0/0x3d0 [ 45.257622] ? debug_check_no_obj_freed+0x200/0x464 [ 45.262623] ? trace_hardirqs_off+0x62/0x220 [ 45.267013] ? drm_version+0x3d0/0x3d0 [ 45.270878] do_vfs_ioctl+0xd6e/0x1390 [ 45.274750] ? ioctl_preallocate+0x210/0x210 [ 45.279137] ? putname+0xef/0x130 [ 45.282579] ? rcu_read_lock_sched_held+0x110/0x130 [ 45.287581] ? kmem_cache_free+0x225/0x260 [ 45.291807] ? putname+0xf4/0x130 [ 45.295253] ? do_sys_open+0x31d/0x5d0 [ 45.299118] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 45.304636] ? security_file_ioctl+0x93/0xc0 [ 45.309020] ksys_ioctl+0xab/0xd0 [ 45.312449] __x64_sys_ioctl+0x73/0xb0 [ 45.316317] do_syscall_64+0x103/0x610 [ 45.320183] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 45.325347] RIP: 0033:0x443de9 [ 45.328517] 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 [ 45.347393] RSP: 002b:00007ffcb48ebb38 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 [ 45.355193] RAX: ffffffffffffffda RBX: 00000000004002e0 RCX: 0000000000443de9 [ 45.362436] RDX: 0000000020000180 RSI: 0000000