[info] Using makefile-style concurrent boot in runlevel 2. [ 24.459012] audit: type=1800 audit(1543397863.563:21): pid=5770 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="bootlogs" dev="sda1" ino=2419 res=0 [ 24.487334] audit: type=1800 audit(1543397863.563:22): pid=5770 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="motd" dev="sda1" ino=2447 res=0 [....] 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. Debian GNU/Linux 7 syzkaller ttyS0 syzkaller login: [ 31.693732] sshd (5910) used greatest stack depth: 15744 bytes left Warning: Permanently added '10.128.10.42' (ECDSA) to the list of known hosts. executing program [ 38.121495] [ 38.123264] ==================================== [ 38.128059] WARNING: syz-executor892/5927 still has locks held! [ 38.134104] 4.20.0-rc4+ #255 Not tainted [ 38.138168] ------------------------------------ [ 38.142957] 1 lock held by syz-executor892/5927: [ 38.147872] #0: 000000007f1a3666 (&sig->cred_guard_mutex){+.+.}, at: prepare_bprm_creds+0x53/0x120 [ 38.157086] [ 38.157086] stack backtrace: [ 38.161567] CPU: 0 PID: 5927 Comm: syz-executor892 Not tainted 4.20.0-rc4+ #255 [ 38.169006] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 38.178337] Call Trace: [ 38.180908] dump_stack+0x244/0x39d [ 38.184525] ? dump_stack_print_info.cold.1+0x20/0x20 [ 38.189705] ? vprintk_func+0x85/0x181 [ 38.193587] debug_check_no_locks_held.cold.49+0x93/0x9f [ 38.199038] flush_old_exec+0x1ea2/0x2480 [ 38.203165] ? save_stack+0x43/0xd0 [ 38.206780] ? __kmalloc+0x15b/0x760 [ 38.210499] ? copy_strings_kernel+0x110/0x110 [ 38.215074] ? ext4_file_read_iter+0x193/0x3c0 [ 38.219642] ? __sanitizer_cov_trace_const_cmp8+0x18/0x20 [ 38.225289] ? __vfs_read+0x11f/0x9b0 [ 38.229074] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 38.234601] ? fsnotify+0x50e/0xef0 [ 38.238215] ? fsnotify+0xef0/0xef0 [ 38.241827] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 38.247501] ? fsnotify_first_mark+0x350/0x350 [ 38.252180] ? __fsnotify_parent+0xcc/0x430 [ 38.256488] ? fsnotify+0xef0/0xef0 [ 38.260109] ? rw_verify_area+0x118/0x360 [ 38.264240] ? vfs_read+0x1ce/0x3c0 [ 38.267867] ? kernel_read+0xab/0x120 [ 38.271670] ? __sanitizer_cov_trace_cmp4+0x16/0x20 [ 38.276673] ? load_elf_phdrs+0x1e4/0x270 [ 38.280800] ? writenote+0x3d0/0x3d0 [ 38.284491] ? __kasan_slab_free+0x119/0x150 [ 38.288900] load_elf_binary+0xa9a/0x5cf0 [ 38.293034] ? find_held_lock+0x36/0x1c0 [ 38.297080] ? notesize.isra.6+0x80/0x80 [ 38.301121] ? ima_file_mmap+0x160/0x160 [ 38.305161] ? lock_downgrade+0x900/0x900 [ 38.309294] ? kasan_check_write+0x14/0x20 [ 38.313517] search_binary_handler+0x17d/0x570 [ 38.320781] __do_execve_file.isra.33+0x1661/0x25d0 [ 38.325788] ? prepare_bprm_creds+0x120/0x120 [ 38.330276] ? usercopy_warn+0x110/0x110 [ 38.334487] ? check_preemption_disabled+0x48/0x280 [ 38.339496] ? rcu_lockdep_current_cpu_online+0x1a4/0x210 [ 38.345020] ? __sanitizer_cov_trace_const_cmp8+0x18/0x20 [ 38.350547] ? strncpy_from_user+0x411/0x5a0 [ 38.354941] ? digsig_verify+0x1530/0x1530 [ 38.359175] ? kmem_cache_alloc+0x33a/0x730 [ 38.363485] ? lockdep_hardirqs_on+0x3bb/0x5b0 [ 38.368069] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 38.373588] __ia32_compat_sys_execveat+0xf3/0x140 [ 38.378519] do_fast_syscall_32+0x34d/0xfb2 [ 38.382824] ? do_int80_syscall_32+0x890/0x890 [ 38.387386] ? entry_SYSENTER_compat+0x68/0x7f [ 38.391949] ? trace_hardirqs_off_caller+0xbb/0x310 [ 38.396957] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 38.401777] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 38.406603] ? trace_hardirqs_on_caller+0x310/0x310 [ 38.411607] ? prepare_exit_to_usermode+0x3b0/0x3b0 [ 38.416604] ? prepare_exit_to_usermode+0x291/0x3b0 [ 38.421775] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 38.426603] entry_SYSENTER_compat+0x70/0x7f [ 38.430986] RIP: 0023:0xf7f7da29 [ 38.434334] Code: 85 d2 74 02 89 0a 5b 5d c3 8b 04 24 c3 8b 14 24 c3 8b 3c 24 c3 90 90 90 90 90 90 90 90 90 90 90 90 51 52 55 89 e5 0f 34 cd 80 <5d> 5a 59 c3 90 90 90 90 eb 0d 90 90 90 90 90 90 90 90 90 90 90 90 [ 38.453370] RSP: 002b:00000000f7f7914c EFLAGS: 00000296 ORIG_RAX: 0000000000000166 [ 38.461056] RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 00000000200000c0 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 [ 38.468307] RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000001000 [ 38.475553] RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000 [ 38.482932] R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000 [ 38.490198] R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000 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 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 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