[....] 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. [ 31.547149] kauditd_printk_skb: 9 callbacks suppressed [ 31.547161] audit: type=1800 audit(1543163490.700:33): pid=5957 uid=0 auid=4294967295 ses=4294967295 subj=system_u:system_r:kernel_t:s0 op=collect_data cause=failed(directio) comm="startpar" name="rc.local" dev="sda1" ino=2432 res=0 [ 31.581402] audit: type=1800 audit(1543163490.700:34): pid=5957 uid=0 auid=4294967295 ses=4294967295 subj=system_u:system_r:kernel_t:s0 op=collect_data cause=failed(directio) comm="startpar" name="rmnologin" dev="sda1" ino=2423 res=0 Debian GNU/Linux 7 syzkaller ttyS0 syzkaller login: [ 33.197991] audit: type=1400 audit(1543163492.350:35): avc: denied { map } for pid=6130 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 '10.128.0.7' (ECDSA) to the list of known hosts. executing program [ 39.799708] audit: type=1400 audit(1543163498.950:36): avc: denied { map } for pid=6144 comm="syz-executor309" path="/root/syz-executor309730418" 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 [ 39.828624] [ 39.830262] ==================================== [ 39.835106] WARNING: syz-executor309/6145 still has locks held! [ 39.841294] 4.20.0-rc3+ #128 Not tainted [ 39.845382] ------------------------------------ [ 39.850245] 1 lock held by syz-executor309/6145: [ 39.855015] #0: 00000000f785c3f3 (&sig->cred_guard_mutex){+.+.}, at: prepare_bprm_creds+0x53/0x120 [ 39.864257] [ 39.864257] stack backtrace: [ 39.868743] CPU: 0 PID: 6145 Comm: syz-executor309 Not tainted 4.20.0-rc3+ #128 [ 39.876170] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 39.885520] Call Trace: [ 39.888110] dump_stack+0x244/0x39d [ 39.891749] ? dump_stack_print_info.cold.1+0x20/0x20 [ 39.896926] ? vprintk_func+0x85/0x181 [ 39.900800] debug_check_no_locks_held.cold.49+0x93/0x9f [ 39.906255] flush_old_exec+0x1ea2/0x2480 [ 39.910389] ? save_stack+0x43/0xd0 [ 39.914003] ? copy_strings_kernel+0x110/0x110 [ 39.918567] ? iov_iter_init+0xe5/0x210 [ 39.922613] ? __sanitizer_cov_trace_const_cmp8+0x18/0x20 [ 39.928131] ? __vfs_read+0x11f/0x9b0 [ 39.932043] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 39.937565] ? fsnotify+0x50e/0xef0 [ 39.941197] ? fsnotify+0xef0/0xef0 [ 39.944806] ? fsnotify_first_mark+0x350/0x350 [ 39.949368] ? __fsnotify_parent+0xcc/0x430 [ 39.953670] ? fsnotify+0xef0/0xef0 [ 39.957291] ? rw_verify_area+0x118/0x360 [ 39.961422] ? vfs_read+0x1ce/0x3c0 [ 39.965030] ? kernel_read+0xab/0x120 [ 39.968812] ? __sanitizer_cov_trace_cmp4+0x16/0x20 [ 39.973814] ? load_elf_phdrs+0x1cd/0x260 [ 39.977943] ? writenote+0x3d0/0x3d0 [ 39.981639] load_elf_binary+0xa39/0x5620 [ 39.985790] ? find_held_lock+0x36/0x1c0 [ 39.989842] ? notesize.isra.6+0x80/0x80 [ 39.993884] ? ima_file_mmap+0x160/0x160 [ 39.997925] ? lock_downgrade+0x900/0x900 [ 40.002056] ? kasan_check_write+0x14/0x20 [ 40.006275] search_binary_handler+0x17d/0x570 [ 40.010842] __do_execve_file.isra.33+0x1661/0x25d0 [ 40.015843] ? prepare_bprm_creds+0x120/0x120 [ 40.020324] ? usercopy_warn+0x110/0x110 [ 40.024376] ? check_preemption_disabled+0x48/0x280 [ 40.029383] ? rcu_lockdep_current_cpu_online+0x1a4/0x210 [ 40.034906] ? __sanitizer_cov_trace_const_cmp8+0x18/0x20 [ 40.040428] ? strncpy_from_user+0x411/0x5a0 [ 40.044824] ? digsig_verify+0x1530/0x1530 [ 40.049038] ? kmem_cache_alloc+0x33a/0x730 [ 40.053343] ? lockdep_hardirqs_on+0x3bb/0x5b0 [ 40.057911] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 40.063434] __x64_sys_execveat+0xed/0x130 [ 40.067657] do_syscall_64+0x1b9/0x820 [ 40.071542] ? entry_SYSCALL_64_after_hwframe+0x3e/0xbe [ 40.076886] ? syscall_return_slowpath+0x5e0/0x5e0 [ 40.081796] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 40.086622] ? trace_hardirqs_on_caller+0x310/0x310 [ 40.091623] ? prepare_exit_to_usermode+0x3b0/0x3b0 [ 40.096624] ? prepare_exit_to_usermode+0x291/0x3b0 [ 40.101636] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 40.106463] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 40.111641] RIP: 0033:0x4457d9 [ 40.114820] Code: e8 6c b6 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 2b 12 fc ff c3 66 2e 0f 1f 84 00 00 00 00 [ 40.133710] RSP: 002b:00007fb7a4b66db8 EFLAGS: 00000246 ORIG_RAX: 0000000000000142 [ 40.141400] RAX: ffffffffffffffda RBX: 00000000006dac28 RCX: 00000000004457d9 [ 40.148653] RDX: 0000000000000