[ 38.093863] audit: type=1800 audit(1546120694.475:26): pid=7606 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="mcstrans" dev="sda1" ino=2457 res=0 [ 38.121887] audit: type=1800 audit(1546120694.475:27): pid=7606 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="restorecond" dev="sda1" ino=2436 res=0 [ 38.143552] audit: type=1800 audit(1546120694.475:28): pid=7606 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. [ 38.816773] audit: type=1800 audit(1546120695.235:29): pid=7606 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 Debian GNU/Linux 7 syzkaller ttyS0 syzkaller login: [ 43.718703] sshd (7743) used greatest stack depth: 15720 bytes left Warning: Permanently added '10.128.15.195' (ECDSA) to the list of known hosts. executing program [ 50.253294] IPVS: ftp: loaded support on port[0] = 21 [ 50.282383] FAULT_INJECTION: forcing a failure. [ 50.282383] name failslab, interval 1, probability 0, space 0, times 1 [ 50.293702] CPU: 0 PID: 7758 Comm: syz-executor589 Not tainted 4.20.0-rc7-next-20181224 #189 [ 50.302293] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 50.311629] Call Trace: [ 50.314197] dump_stack+0x1d3/0x2c6 [ 50.317802] ? dump_stack_print_info.cold.1+0x20/0x20 [ 50.322988] ? lock_acquire+0x1ed/0x520 [ 50.326946] should_fail.cold.4+0xa/0x17 [ 50.330987] ? arch_local_save_flags+0x40/0x40 [ 50.335588] ? fault_create_debugfs_attr+0x1f0/0x1f0 [ 50.340700] ? graph_lock+0x270/0x270 [ 50.344477] ? graph_lock+0x270/0x270 [ 50.348297] ? __drm_mode_object_find+0x33/0x210 [ 50.353100] ? find_held_lock+0x36/0x1c0 [ 50.357163] ? __lock_is_held+0xb5/0x140 [ 50.361211] ? ___might_sleep+0x1ed/0x300 [ 50.365342] ? arch_local_save_flags+0x40/0x40 [ 50.369908] __should_failslab+0x124/0x180 [ 50.374130] should_failslab+0x9/0x14 [ 50.377929] kmem_cache_alloc_trace+0x2db/0x750 [ 50.382579] ? drm_modeset_backoff+0x790/0x790 [ 50.387148] ? wait_for_completion+0x8a0/0x8a0 [ 50.391714] drm_atomic_state_alloc+0xb8/0x110 [ 50.396279] set_property_atomic+0xbb/0x330 [ 50.400580] ? refcount_dec_and_mutex_lock+0x90/0x90 [ 50.405679] ? drm_object_property_get_value+0x180/0x180 [ 50.411135] ? mutex_unlock+0xd/0x10 [ 50.414830] ? __drm_mode_object_find+0xb8/0x210 [ 50.419573] drm_mode_obj_set_property_ioctl+0x53a/0x800 [ 50.425002] ? drm_mode_obj_find_prop_id+0x1c0/0x1c0 [ 50.430118] ? lock_downgrade+0x900/0x900 [ 50.434256] ? lock_release+0xa00/0xa00 [ 50.438230] drm_connector_property_set_ioctl+0x1a1/0x2a0 [ 50.443761] ? drm_connector_set_obj_prop+0x1a0/0x1a0 [ 50.448928] ? drm_lease_owner+0x44/0x60 [ 50.452966] ? drm_is_current_master+0x5c/0x140 [ 50.457631] drm_ioctl_kernel+0x278/0x330 [ 50.461759] ? drm_connector_set_obj_prop+0x1a0/0x1a0 [ 50.466945] ? drm_setversion+0x8b0/0x8b0 [ 50.471077] ? __sanitizer_cov_trace_const_cmp8+0x18/0x20 [ 50.476615] ? _copy_from_user+0xdf/0x150 [ 50.480741] drm_ioctl+0x58f/0xb90 [ 50.484264] ? drm_connector_set_obj_prop+0x1a0/0x1a0 [ 50.489438] ? drm_version+0x3d0/0x3d0 [ 50.493302] ? proc_fail_nth_write+0x9e/0x210 [ 50.497809] ? proc_cwd_link+0x1d0/0x1d0 [ 50.501853] ? trace_hardirqs_off+0xb8/0x310 [ 50.506245] ? find_held_lock+0x36/0x1c0 [ 50.510295] ? vfs_write+0x2f3/0x580 [ 50.513992] ? drm_version+0x3d0/0x3d0 [ 50.517864] do_vfs_ioctl+0x1de/0x1790 [ 50.521728] ? __lock_is_held+0xb5/0x140 [ 50.525769] ? ioctl_preallocate+0x300/0x300 [ 50.530171] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 50.535692] ? __fget_light+0x2e9/0x430 [ 50.539662] ? fget_raw+0x20/0x20 [ 50.543133] ? __sb_end_write+0xd9/0x110 [ 50.547215] ? do_syscall_64+0x9a/0x820 [ 50.551192] ? do_syscall_64+0x9a/0x820 [ 50.555142] ? lockdep_hardirqs_on+0x421/0x5c0 [ 50.559715] ? security_file_ioctl+0x94/0xc0 [ 50.564109] ksys_ioctl+0xa9/0xd0 [ 50.567558] __x64_sys_ioctl+0x73/0xb0 [ 50.571421] do_syscall_64+0x1b9/0x820 [ 50.575284] ? entry_SYSCALL_64_after_hwframe+0x3e/0xbe [ 50.580627] ? syscall_return_slowpath+0x5e0/0x5e0 [ 50.585569] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 50.590418] ? trace_hardirqs_on_caller+0x310/0x310 [ 50.595410] ? prepare_exit_to_usermode+0x3b0/0x3b0 [ 50.600419] ? prepare_exit_to_usermode+0x291/0x3b0 [ 50.605442] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 50.610273] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 50.615440] RIP: 0033:0x444639 [ 50.618614] 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 db d4 fb ff c3 66 2e 0f 1f 84 00 00 00 00 [ 50.637499] RSP: 002b:00007ffeaabfe8d8 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 [ 50.645195] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 0000000000444639 [ 50.652466] RDX: 0000000020000000 RSI: 000000004010aeab RDI: 0000000000000004 [ 50.659718] RBP: 00007ffeaabfe8f0 R08: 0000000000000001 R09: 0000000000000100 [ 50.666977] R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000005 [ 50.674263] R13: ffffffffffffffff R14: 0000000000000000 R15: 0000000000000000 [ 50.682713] [ 50.684350] ================================================ [ 50.690127] WARNING: lock held when returning to user space! [ 50.695897] 4.20.0-rc7-next-20181224 #189 Not tainted [ 50.701066] ------------------------------------------------ [ 50.706843] syz-executor589/7758 is leaving the kernel with locks still held! [ 50.714101] 1 lock held by syz-executor589/7758: [ 50.718835] #0: 00000000c4fefe26 (crtc_ww_class_acquire){+.+.}, at: set_property_atomic+0xb3/0x330