[....] Starting enhanced syslogd: rsyslogd[?25l[?1c7[ ok 8[?25h[?0c. [....] Starting periodic command scheduler: cron[?25l[?1c7[ ok 8[?25h[?0c. [....] Starting OpenBSD Secure Shell server: sshd[?25l[?1c7[ ok 8[?25h[?0c. [ 29.598292] kauditd_printk_skb: 7 callbacks suppressed [ 29.598304] audit: type=1800 audit(1543075845.420:29): pid=5960 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 [ 29.623756] audit: type=1800 audit(1543075845.420:30): pid=5960 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="rmnologin" dev="sda1" ino=2423 res=0 Debian GNU/Linux 7 syzkaller ttyS0 Warning: Permanently added '10.128.0.76' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 37.684447] [ 37.686213] ==================================== [ 37.690957] WARNING: syz-executor291/6114 still has locks held! [ 37.697259] 4.20.0-rc3+ #347 Not tainted [ 37.701308] ------------------------------------ [ 37.706139] kobject: 'regulatory.0' (0000000044cf11c3): kobject_uevent_env [ 37.713161] kobject: 'regulatory.0' (0000000044cf11c3): fill_kobj_path: path = '/devices/platform/regulatory.0' [ 37.713754] 1 lock held by syz-executor291/6114: [ 37.728199] #0: 00000000ba6daabf (&sig->cred_guard_mutex){+.+.}, at: prepare_bprm_creds+0x53/0x120 [ 37.737483] [ 37.737483] stack backtrace: [ 37.741982] CPU: 0 PID: 6114 Comm: syz-executor291 Not tainted 4.20.0-rc3+ #347 [ 37.749407] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 37.758903] Call Trace: [ 37.761476] dump_stack+0x244/0x39d [ 37.765087] ? dump_stack_print_info.cold.1+0x20/0x20 [ 37.770264] ? vprintk_func+0x85/0x181 [ 37.774135] debug_check_no_locks_held.cold.49+0x93/0x9f [ 37.779567] flush_old_exec+0x1ea2/0x2480 [ 37.783717] ? save_stack+0x43/0xd0 [ 37.787341] ? __kmalloc+0x15b/0x760 [ 37.791042] ? copy_strings_kernel+0x110/0x110 [ 37.795607] ? ext4_file_read_iter+0x193/0x3c0 [ 37.800172] ? __sanitizer_cov_trace_const_cmp8+0x18/0x20 [ 37.805705] ? __vfs_read+0x11f/0x9b0 [ 37.809502] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 37.815021] ? fsnotify+0x50e/0xef0 [ 37.818629] ? fsnotify+0xef0/0xef0 [ 37.822274] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 37.827792] ? fsnotify_first_mark+0x350/0x350 [ 37.832378] ? __fsnotify_parent+0xcc/0x430 [ 37.836685] ? fsnotify+0xef0/0xef0 [ 37.840294] ? rw_verify_area+0x118/0x360 [ 37.844459] ? vfs_read+0x1ce/0x3c0 [ 37.848095] ? kernel_read+0xab/0x120 [ 37.851893] ? __sanitizer_cov_trace_cmp4+0x16/0x20 [ 37.856897] ? load_elf_phdrs+0x1cd/0x260 [ 37.861027] ? writenote+0x3d0/0x3d0 [ 37.864742] ? refcount_inc_not_zero_checked+0x2f0/0x2f0 [ 37.870198] load_elf_binary+0xa39/0x5620 [ 37.874360] ? find_held_lock+0x36/0x1c0 [ 37.878409] ? notesize.isra.6+0x80/0x80 [ 37.882465] ? ima_file_mmap+0x160/0x160 [ 37.886530] ? lock_downgrade+0x900/0x900 [ 37.890711] ? kasan_check_write+0x14/0x20 [ 37.894939] search_binary_handler+0x17d/0x570 [ 37.899509] __do_execve_file.isra.33+0x1661/0x25d0 [ 37.904509] ? prepare_bprm_creds+0x120/0x120 [ 37.908988] ? usercopy_warn+0x110/0x110 [ 37.913032] ? check_preemption_disabled+0x48/0x280 [ 37.918034] ? rcu_lockdep_current_cpu_online+0x1a4/0x210 [ 37.923557] ? __sanitizer_cov_trace_const_cmp8+0x18/0x20 [ 37.929077] ? strncpy_from_user+0x411/0x5a0 [ 37.933501] ? digsig_verify+0x1530/0x1530 [ 37.937733] ? kmem_cache_alloc+0x33a/0x730 [ 37.942055] ? lockdep_hardirqs_on+0x3bb/0x5b0 [ 37.946621] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 37.952138] __x64_sys_execveat+0xed/0x130 [ 37.956377] do_syscall_64+0x1b9/0x820 [ 37.960251] ? entry_SYSCALL_64_after_hwframe+0x3e/0xbe [ 37.965599] ? syscall_return_slowpath+0x5e0/0x5e0 [ 37.970531] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 37.975357] ? trace_hardirqs_on_caller+0x310/0x310 [ 37.980351] ? prepare_exit_to_usermode+0x3b0/0x3b0 [ 37.985369] ? prepare_exit_to_usermode+0x291/0x3b0 [ 37.990367] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 37.995220] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 38.000500] RIP: 0033:0x445639 [ 38.003674] Code: e8 ec b8 02 00 48 83 c4 18 c3 0f 1f 80 00 00 00 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 8b 12 fc ff c3 66 2e 0f 1f 84 00 00 00 00 [ 38.022575] RSP: 002b:00007f70a9d9bd18 EFLAGS: 00000246 ORIG_RAX: 0000000000000142 executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program [ 38.030259] RAX: ffffffffffffffda RBX: 00000000006dac28 RCX: 0000000000445639 [ 38.037508] RDX: 0000000000000000 RSI: 0000000020000000 RDI: 0000000000000003 [ 38.044758] RBP: 00000000006dac20 R08: 0000000000001000 R09: 65732f636f72702f [ 38.052035] R10: 0000000000000000 R11: 0000000000000246 R12: 00007f70a9d9bd20 [ 38.059284] R13: 00000000006dac2c R14: 0000000020000280 R15: 00000000006dad2c executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program