Starting mcstransd: [....] Starting periodic command scheduler: cron[?25l[?1c7[ ok 8[?25h[?0c. [....] Starting file context maintaining daemon: restorecond[?25l[?1c7[ ok 8[?25h[?0c. [....] Starting OpenBSD Secure Shell server: sshd[?25l[?1c7[ ok 8[?25h[?0c. [....] startpar: service(s) returned failure: ssh ...[?25l[?1c7[FAIL8[?25h[?0c failed! Debian GNU/Linux 7 syzkaller ttyS0 syzkaller login: [ 51.049579] kauditd_printk_skb: 4 callbacks suppressed [ 51.049595] audit: type=1400 audit(1546837167.963:35): avc: denied { map } for pid=8274 comm="bash" path="/bin/bash" dev="sda1" ino=1457 scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=system_u:object_r:file_t:s0 tclass=file permissive=1 Warning: Permanently added '10.128.0.66' (ECDSA) to the list of known hosts. executing program [ 57.853969] audit: type=1400 audit(1546837174.763:36): avc: denied { map } for pid=8286 comm="syz-executor141" path="/root/syz-executor141253313" dev="sda1" ino=16483 scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=unconfined_u:object_r:user_home_t:s0 tclass=file permissive=1 [ 57.858761] INFO: trying to register non-static key. [ 57.885319] the code is fine but needs lockdep annotation. [ 57.890928] turning off the locking correctness validator. [ 57.896543] CPU: 1 PID: 8286 Comm: syz-executor141 Not tainted 4.20.0+ #13 [ 57.903543] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 57.912874] Call Trace: [ 57.915446] dump_stack+0x1db/0x2d0 [ 57.919056] ? dump_stack_print_info.cold+0x20/0x20 [ 57.924055] ? vprintk_func+0x86/0x189 [ 57.927931] register_lock_class+0x19dc/0x1e60 [ 57.932501] ? __sanitizer_cov_trace_cmp4+0x16/0x20 [ 57.937504] ? bpf_prog_kallsyms_find+0xca/0x4b0 [ 57.942241] ? check_noncircular+0x20/0x20 [ 57.946455] ? module_enable_ro.part.0+0xe0/0xe0 [ 57.951189] ? __bpf_trace_xdp_cpumap_enqueue+0x40/0x40 [ 57.956541] ? check_preemption_disabled+0x48/0x290 [ 57.961551] ? lock_downgrade+0x910/0x910 [ 57.965680] ? check_noncircular+0x20/0x20 [ 57.969896] ? rcu_read_unlock_special+0x380/0x380 [ 57.974826] ? check_noncircular+0x20/0x20 [ 57.979044] ? print_usage_bug+0xd0/0xd0 [ 57.983087] ? is_bpf_text_address+0xd3/0x170 [ 57.987581] ? kernel_text_address+0x73/0xf0 [ 57.991970] ? __kernel_text_address+0xd/0x40 [ 57.996449] __lock_acquire+0x149/0x4a30 [ 58.000496] ? print_usage_bug+0xd0/0xd0 [ 58.004536] ? print_usage_bug+0xd0/0xd0 [ 58.008577] ? add_lock_to_list.isra.0+0x1c9/0x450 [ 58.013491] ? mark_held_locks+0x100/0x100 [ 58.017707] ? __lock_acquire+0x572/0x4a30 [ 58.021927] ? __lock_acquire+0x2514/0x4a30 [ 58.026229] ? trace_hardirqs_off_caller+0x300/0x300 [ 58.031313] ? mark_held_locks+0x100/0x100 [ 58.035527] ? mark_held_locks+0x100/0x100 [ 58.039743] ? mark_held_locks+0x100/0x100 [ 58.043957] ? mark_held_locks+0x100/0x100 [ 58.048174] ? add_lock_to_list.isra.0+0x450/0x450 [ 58.053082] ? add_lock_to_list.isra.0+0x450/0x450 [ 58.057994] ? print_usage_bug+0xd0/0xd0 [ 58.062042] ? try_wait_for_completion+0x146/0x190 [ 58.066956] lock_acquire+0x1db/0x570 [ 58.070739] ? __flush_work+0x762/0xa20 [ 58.074694] ? lock_release+0xc40/0xc40 [ 58.078656] ? try_wait_for_completion+0x146/0x190 [ 58.083575] ? trace_hardirqs_off_caller+0x300/0x300 [ 58.088657] ? lockdep_hardirqs_on+0x415/0x5d0 [ 58.093238] __flush_work+0x787/0xa20 [ 58.097019] ? __flush_work+0x762/0xa20 [ 58.100973] ? insert_work+0x620/0x620 [ 58.104845] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 58.110362] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 58.115882] ? check_preemption_disabled+0x48/0x290 [ 58.120882] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 58.126396] ? refcount_sub_and_test_checked+0x1fe/0x2f0 [ 58.131842] ? refcount_inc_not_zero_checked+0x2e0/0x2e0 [ 58.137275] ? __drm_atomic_helper_crtc_destroy_state+0xf3/0x340 [ 58.143422] flush_work+0x18/0x20 [ 58.146861] vkms_atomic_crtc_destroy_state+0x2d/0x40 [ 58.152033] drm_atomic_state_default_clear+0x37c/0xd60 [ 58.157378] drm_atomic_state_clear+0x9d/0xc0 [ 58.161851] __drm_atomic_state_free+0x3c/0xf0 [ 58.166413] drm_atomic_helper_set_config+0xe5/0x160 [ 58.171498] drm_mode_setcrtc+0x73c/0x1870 [ 58.175732] ? avc_has_extended_perms+0xb52/0x1550 [ 58.180644] ? drm_mode_getcrtc+0x870/0x870 [ 58.184971] ? drm_unbind_agp+0x20/0x20 [ 58.188964] ? drm_unbind_agp+0x20/0x20 [ 58.192926] ? drm_dev_unregister+0x480/0x480 [ 58.197506] ? drm_lease_owner+0x45/0x60 [ 58.201550] ? drm_is_current_master+0x5c/0x140 [ 58.206220] drm_ioctl_kernel+0x278/0x340 [ 58.210348] ? drm_mode_getcrtc+0x870/0x870 [ 58.214650] ? drm_setversion+0x8c0/0x8c0 [ 58.218780] ? __sanitizer_cov_trace_const_cmp8+0x18/0x20 [ 58.224296] ? _copy_from_user+0xdd/0x150 [ 58.228428] drm_ioctl+0x592/0xb50 [ 58.231948] ? drm_mode_getcrtc+0x870/0x870 [ 58.236252] ? drm_version+0x3d0/0x3d0 [ 58.240124] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 58.245642] ? __might_sleep+0x95/0x190 [ 58.249598] ? drm_version+0x3d0/0x3d0 [ 58.253465] do_vfs_ioctl+0x107b/0x17d0 [ 58.257425] ? selinux_file_ioctl+0x511/0x720 [ 58.261901] ? selinux_file_ioctl+0x125/0x720 [ 58.266384] ? ioctl_preallocate+0x2f0/0x2f0 [ 58.270772] ? selinux_file_mprotect+0x620/0x620 [ 58.275505] ? __fget_light+0x2db/0x420 [ 58.279465] ? do_syscall_64+0x8c/0x800 [ 58.283422] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 58.288941] ? security_file_ioctl+0x93/0xc0 [ 58.293328] ksys_ioctl+0xab/0xd0 [ 58.296780] __x64_sys_ioctl+0x73/0xb0 [ 58.300649] do_syscall_64+0x1a3/0x800 [ 58.304517] ? syscall_return_slowpath+0x5f0/0x5f0 [ 58.309452] ? prepare_exit_to_usermode+0x232/0x3b0 [ 58.314452] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 58.319284] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 58.324450] RIP: 0033:0x443e59 [ 58.327628] 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 [ 58.346595] RSP: 002b:00007ffd076a8768 EFLAGS: 00000213 ORIG_RAX: 0000000000000010 [ 58.354279] RAX: ff