[ 39.780106] audit: type=1800 audit(1549763643.412:28): pid=7746 uid=0 auid=4294967295 ses=4294967295 subj=_ 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. [ 40.388195] audit: type=1800 audit(1549763644.112:29): pid=7746 uid=0 auid=4294967295 ses=4294967295 subj=_ op=collect_data cause=failed(directio) comm="startpar" name="rc.local" dev="sda1" ino=2432 res=0 [ 40.406761] audit: type=1800 audit(1549763644.122:30): pid=7746 uid=0 auid=4294967295 ses=4294967295 subj=_ 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 '10.128.0.60' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 52.007139] INFO: trying to register non-static key. [ 52.012265] the code is fine but needs lockdep annotation. [ 52.017866] turning off the locking correctness validator. [ 52.023475] CPU: 0 PID: 7920 Comm: syz-executor036 Not tainted 5.0.0-rc5+ #65 [ 52.030724] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 52.040055] Call Trace: [ 52.042632] dump_stack+0x172/0x1f0 [ 52.046244] register_lock_class+0x1bdc/0x1bf0 [ 52.050813] ? __sanitizer_cov_trace_cmp4+0x16/0x20 [ 52.055818] ? bpf_prog_kallsyms_find+0x50/0x2c0 [ 52.060642] ? check_noncircular+0x20/0x20 [ 52.064857] ? is_bpf_text_address+0xd3/0x170 [ 52.069337] ? kernel_text_address+0x73/0xf0 [ 52.073730] __lock_acquire+0x11f/0x4700 [ 52.077782] ? check_noncircular+0x20/0x20 [ 52.082003] ? mark_held_locks+0x100/0x100 [ 52.086221] ? __lock_acquire+0x53b/0x4700 [ 52.090434] ? __lock_acquire+0x53b/0x4700 [ 52.094651] ? __lock_acquire+0x53b/0x4700 [ 52.098868] lock_acquire+0x16f/0x3f0 [ 52.102655] ? __flush_work+0x61a/0x840 [ 52.106611] __flush_work+0x640/0x840 [ 52.110389] ? __flush_work+0x61a/0x840 [ 52.114360] ? try_wait_for_completion+0x9a/0xd0 [ 52.119096] ? insert_work+0x3a0/0x3a0 [ 52.122966] ? mark_held_locks+0xb1/0x100 [ 52.127095] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 52.132619] ? refcount_sub_and_test_checked+0x161/0x1f0 [ 52.138070] ? refcount_inc_checked+0x70/0x70 [ 52.142549] ? rcu_lockdep_current_cpu_online+0xe3/0x130 [ 52.147997] ? __drm_atomic_helper_crtc_destroy_state+0xf3/0x340 [ 52.154123] flush_work+0x18/0x20 [ 52.157562] vkms_atomic_crtc_destroy_state+0x2d/0x40 [ 52.162735] drm_atomic_state_default_clear+0x37c/0xd60 [ 52.168081] drm_atomic_state_clear+0x9d/0xc0 [ 52.172558] __drm_atomic_state_free+0x3c/0xf0 [ 52.177123] drm_atomic_helper_set_config+0xe5/0x160 [ 52.182209] drm_mode_setcrtc+0x613/0x1490 [ 52.186423] ? mark_held_locks+0x100/0x100 [ 52.190654] ? drm_mode_getcrtc+0x870/0x870 [ 52.194963] ? drm_unbind_agp+0x20/0x20 [ 52.198917] ? find_held_lock+0x35/0x130 [ 52.202960] ? drm_unbind_agp+0x20/0x20 [ 52.206919] ? drm_lease_owner+0x45/0x60 [ 52.210961] ? drm_is_current_master+0x5c/0x140 [ 52.215625] drm_ioctl_kernel+0x23b/0x2e0 [ 52.219752] ? drm_mode_getcrtc+0x870/0x870 [ 52.224062] ? drm_setversion+0x8c0/0x8c0 [ 52.228221] ? __sanitizer_cov_trace_const_cmp8+0x18/0x20 [ 52.233742] ? _copy_from_user+0xdd/0x150 [ 52.237900] drm_ioctl+0x545/0xa50 [ 52.241418] ? drm_mode_getcrtc+0x870/0x870 [ 52.245724] ? drm_version+0x3d0/0x3d0 [ 52.249590] ? smack_log+0x415/0x540 [ 52.253284] ? debug_check_no_obj_freed+0x200/0x464 [ 52.258285] ? smk_tskacc+0x2ba/0x390 [ 52.262068] ? drm_version+0x3d0/0x3d0 [ 52.265938] do_vfs_ioctl+0xd6e/0x1390 [ 52.269807] ? smk_curacc+0x7f/0xa0 [ 52.273417] ? ioctl_preallocate+0x210/0x210 [ 52.277810] ? smack_file_ioctl+0x196/0x300 [ 52.282114] ? smack_file_lock+0x240/0x240 [ 52.286349] ? rcu_read_lock_sched_held+0x110/0x130 [ 52.291361] ? kmem_cache_free+0x141/0x260 [ 52.295578] ? do_sys_open+0x31d/0x5d0 [ 52.299447] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 52.304967] ? security_file_ioctl+0x93/0xc0 [ 52.309356] ksys_ioctl+0xab/0xd0 [ 52.312807] __x64_sys_ioctl+0x73/0xb0 [ 52.316680] do_syscall_64+0x103/0x610 [ 52.320550] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 52.325719] RIP: 0033:0x443de9 [ 52.328906] 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 [ 52.347793] RSP: 002b:00007ffe5e29d738 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 [ 52.355482] RAX: ffffffffffffffda