[ 46.957169] audit: type=1800 audit(1548934098.920:29): pid=8110 uid=0 auid=4294967295 ses=4294967295 subj=system_u:system_r:kernel_t:s0 op=collect_data cause=failed(directio) comm="startpar" name="cron" dev="sda1" ino=2414 res=0 [ 47.001198] audit: type=1800 audit(1548934098.930:30): pid=8110 uid=0 auid=4294967295 ses=4294967295 subj=system_u:system_r:kernel_t:s0 op=collect_data cause=failed(directio) comm="startpar" name="mcstrans" dev="sda1" ino=2457 res=0 Starting mcstransd: [....] Starting periodic command scheduler: cron[?25l[?1c7[ ok 8[?25h[?0c. [....] Starting OpenBSD Secure Shell server: sshd[?25l[?1c7[ ok 8[?25h[?0c. [....] Starting file context maintaining daemon: restorecond[?25l[?1c7[ ok 8[?25h[?0c. Debian GNU/Linux 7 syzkaller ttyS0 syzkaller login: [ 50.459236] sshd (8285) used greatest stack depth: 19848 bytes left Warning: Permanently added '10.128.0.200' (ECDSA) to the list of known hosts. executing program [ 57.248390] kauditd_printk_skb: 5 callbacks suppressed [ 57.248405] audit: type=1400 audit(1548934109.210:36): avc: denied { map } for pid=8299 comm="syz-executor168" path="/root/syz-executor168640040" dev="sda1" ino=16484 scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=unconfined_u:object_r:user_home_t:s0 tclass=file permissive=1 [ 57.253036] INFO: trying to register non-static key. [ 57.285010] the code is fine but needs lockdep annotation. [ 57.290607] turning off the locking correctness validator. [ 57.296214] CPU: 1 PID: 8299 Comm: syz-executor168 Not tainted 5.0.0-rc4+ #53 [ 57.303584] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 57.312914] Call Trace: [ 57.315521] dump_stack+0x1db/0x2d0 [ 57.319132] ? dump_stack_print_info.cold+0x20/0x20 [ 57.324134] ? vprintk_func+0x86/0x189 [ 57.328052] register_lock_class+0x19dc/0x1e60 [ 57.332625] ? __sanitizer_cov_trace_cmp4+0x16/0x20 [ 57.337717] ? bpf_prog_kallsyms_find+0xca/0x4b0 [ 57.342453] ? check_noncircular+0x20/0x20 [ 57.346787] ? module_enable_ro.part.0+0xe0/0xe0 [ 57.351526] ? __bpf_trace_xdp_cpumap_enqueue+0x40/0x40 [ 57.356878] ? check_preemption_disabled+0x48/0x290 [ 57.361875] ? lock_downgrade+0x910/0x910 [ 57.366001] ? check_noncircular+0x20/0x20 [ 57.370230] ? rcu_read_unlock_special+0x380/0x380 [ 57.375414] ? check_noncircular+0x20/0x20 [ 57.379636] ? print_usage_bug+0xd0/0xd0 [ 57.383680] ? is_bpf_text_address+0xd3/0x170 [ 57.388154] ? kernel_text_address+0x73/0xf0 [ 57.392549] ? __kernel_text_address+0xd/0x40 [ 57.397027] __lock_acquire+0x149/0x4a30 [ 57.401066] ? print_usage_bug+0xd0/0xd0 [ 57.405109] ? print_usage_bug+0xd0/0xd0 [ 57.409149] ? add_lock_to_list.isra.0+0x1c9/0x450 [ 57.414059] ? mark_held_locks+0x100/0x100 [ 57.418274] ? __lock_acquire+0x572/0x4a30 [ 57.422487] ? __lock_acquire+0x2514/0x4a30 [ 57.426788] ? mark_held_locks+0x100/0x100 [ 57.431005] ? mark_held_locks+0x100/0x100 [ 57.435219] ? mark_held_locks+0x100/0x100 [ 57.439430] ? mark_held_locks+0x100/0x100 [ 57.443643] ? add_lock_to_list.isra.0+0x450/0x450 [ 57.448558] ? add_lock_to_list.isra.0+0x450/0x450 [ 57.453474] ? save_stack+0x45/0xd0 [ 57.457084] ? __kasan_kmalloc.constprop.0+0xcf/0xe0 [ 57.462168] ? print_usage_bug+0xd0/0xd0 [ 57.466212] ? try_wait_for_completion+0x146/0x190 [ 57.471129] lock_acquire+0x1db/0x570 [ 57.474911] ? __flush_work+0x762/0xa20 [ 57.478863] ? lock_release+0xc40/0xc40 [ 57.482820] ? try_wait_for_completion+0x146/0x190 [ 57.487731] ? trace_hardirqs_off_caller+0x300/0x300 [ 57.492815] ? lockdep_hardirqs_on+0x415/0x5d0 [ 57.497379] __flush_work+0x787/0xa20 [ 57.501157] ? __flush_work+0x762/0xa20 [ 57.505115] ? insert_work+0x620/0x620 [ 57.508990] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 57.514504] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 57.520030] ? check_preemption_disabled+0x48/0x290 [ 57.525027] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 57.530546] ? refcount_sub_and_test_checked+0x1fe/0x2f0 [ 57.535997] ? refcount_inc_not_zero_checked+0x2e0/0x2e0 [ 57.541431] ? __drm_atomic_helper_crtc_destroy_state+0xf3/0x340 [ 57.547561] flush_work+0x18/0x20 [ 57.550996] vkms_atomic_crtc_destroy_state+0x2d/0x40 [ 57.556171] drm_atomic_state_default_clear+0x37c/0xd60 [ 57.561515] drm_atomic_state_clear+0x9d/0xc0 [ 57.565996] __drm_atomic_state_free+0x3c/0xf0 [ 57.570561] drm_atomic_helper_set_config+0xe5/0x160 [ 57.575664] drm_mode_setcrtc+0x73c/0x1870 [ 57.579882] ? avc_has_extended_perms+0xb52/0x1550 [ 57.584800] ? drm_mode_getcrtc+0x870/0x870 [ 57.589098] ? drm_unbind_agp+0x20/0x20 [ 57.593052] ? drm_unbind_agp+0x20/0x20 [ 57.597007] ? drm_dev_unregister+0x480/0x480 [ 57.601487] ? drm_lease_owner+0x45/0x60 [ 57.605533] ? drm_is_current_master+0x5c/0x140 [ 57.610184] drm_ioctl_kernel+0x278/0x340 [ 57.614312] ? drm_mode_getcrtc+0x870/0x870 [ 57.618611] ? drm_setversion+0x8c0/0x8c0 [ 57.622743] ? __sanitizer_cov_trace_const_cmp8+0x18/0x20 [ 57.628618] ? _copy_from_user+0xdd/0x150 [ 57.632750] drm_ioctl+0x592/0xb50 [ 57.636268] ? drm_mode_getcrtc+0x870/0x870 [ 57.640567] ? drm_version+0x3d0/0x3d0 [ 57.644443] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 57.649966] ? __might_sleep+0x95/0x190 [ 57.653920] ? drm_version+0x3d0/0x3d0 [ 57.657785] do_vfs_ioctl+0x107b/0x17d0 [ 57.661742] ? selinux_file_ioctl+0x511/0x720 [ 57.666233] ? selinux_file_ioctl+0x125/0x720 [ 57.670723] ? ioctl_preallocate+0x2f0/0x2f0 [ 57.675110] ? selinux_file_mprotect+0x620/0x620 [ 57.679843] ? __fget_light+0x2db/0x420 [ 57.683803] ? do_syscall_64+0x8c/0x800 [ 57.687759] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 57.693281] ? security_file_ioctl+0x93/0xc0 [ 57.697682] ksys_ioctl+0xab/0xd0 [ 57.701115] __x64_sys_ioctl+0x73/0xb0 [ 57.704984] do_syscall_64+0x1a3/0x800 [ 57.708874] ? syscall_return_slowpath+0x5f0/0x5f0 [ 57.713791] ? prepare_exit_to_usermode+0x232/0x3b0 [ 57.718787] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 57.723630] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 57.728798] RIP: 0033:0x443de9 [ 57.731970] 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