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. [ 36.735319] audit: type=1800 audit(1543612280.917:33): pid=6179 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 [ 36.756500] audit: type=1800 audit(1543612280.917:34): pid=6179 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: [ 39.619870] audit: type=1400 audit(1543612283.797:35): avc: denied { map } for pid=6354 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 '10.128.10.57' (ECDSA) to the list of known hosts. executing program [ 46.265719] audit: type=1400 audit(1543612290.447:36): avc: denied { map } for pid=6367 comm="syz-executor704" path="/root/syz-executor704291750" 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 [ 46.296866] [ 46.298514] ==================================== [ 46.303262] WARNING: syz-executor704/6368 still has locks held! [ 46.309410] 4.20.0-rc4+ #136 Not tainted [ 46.313466] ------------------------------------ [ 46.318243] 1 lock held by syz-executor704/6368: [ 46.322993] #0: 0000000087537b44 (&sig->cred_guard_mutex){+.+.}, at: prepare_bprm_creds+0x53/0x120 [ 46.332226] [ 46.332226] stack backtrace: [ 46.336743] CPU: 1 PID: 6368 Comm: syz-executor704 Not tainted 4.20.0-rc4+ #136 [ 46.344193] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 46.353536] Call Trace: [ 46.356111] dump_stack+0x244/0x39d [ 46.359739] ? dump_stack_print_info.cold.1+0x20/0x20 [ 46.364913] ? vprintk_func+0x85/0x181 [ 46.368790] debug_check_no_locks_held.cold.49+0x93/0x9f [ 46.374232] flush_old_exec+0x1ea2/0x2480 [ 46.378368] ? save_stack+0x43/0xd0 [ 46.381981] ? copy_strings_kernel+0x110/0x110 [ 46.386550] ? iov_iter_init+0xe5/0x210 [ 46.390510] ? __sanitizer_cov_trace_const_cmp8+0x18/0x20 [ 46.396033] ? __vfs_read+0x11f/0x9b0 [ 46.399849] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 46.405373] ? fsnotify+0x50e/0xef0 [ 46.409005] ? fsnotify+0xef0/0xef0 [ 46.412628] ? fsnotify_first_mark+0x350/0x350 [ 46.417211] ? __fsnotify_parent+0xcc/0x430 [ 46.421533] ? fsnotify+0xef0/0xef0 [ 46.425147] ? rw_verify_area+0x118/0x360 [ 46.429279] ? vfs_read+0x1ce/0x3c0 [ 46.432888] ? kernel_read+0xab/0x120 [ 46.436690] ? __sanitizer_cov_trace_cmp4+0x16/0x20 [ 46.441687] ? load_elf_phdrs+0x1cd/0x260 [ 46.445814] ? writenote+0x3d0/0x3d0 [ 46.449511] load_elf_binary+0xa39/0x5620 [ 46.453757] ? find_held_lock+0x36/0x1c0 [ 46.457804] ? notesize.isra.6+0x80/0x80 [ 46.461865] ? ima_file_mmap+0x160/0x160 [ 46.465907] ? lock_downgrade+0x900/0x900 [ 46.470065] ? kasan_check_write+0x14/0x20 [ 46.474287] search_binary_handler+0x17d/0x570 [ 46.478852] __do_execve_file.isra.33+0x1661/0x25d0 [ 46.483867] ? prepare_bprm_creds+0x120/0x120 [ 46.488347] ? usercopy_warn+0x110/0x110 [ 46.492394] ? check_preemption_disabled+0x48/0x280 [ 46.497394] ? rcu_lockdep_current_cpu_online+0x1a4/0x210 [ 46.502940] ? __sanitizer_cov_trace_const_cmp8+0x18/0x20 [ 46.508467] ? strncpy_from_user+0x411/0x5a0 [ 46.512864] ? digsig_verify+0x1530/0x1530 [ 46.517098] ? kmem_cache_alloc+0x33a/0x730 [ 46.521415] ? lockdep_hardirqs_on+0x3bb/0x5b0 [ 46.525994] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 46.531555] __x64_sys_execveat+0xed/0x130 [ 46.535802] do_syscall_64+0x1b9/0x820 [ 46.539674] ? entry_SYSCALL_64_after_hwframe+0x3e/0xbe [ 46.545026] ? syscall_return_slowpath+0x5e0/0x5e0 [ 46.549943] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 46.554770] ? trace_hardirqs_on_caller+0x310/0x310 [ 46.559781] ? prepare_exit_to_usermode+0x3b0/0x3b0 [ 46.564777] ? prepare_exit_to_usermode+0x291/0x3b0 [ 46.569776] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 46.574603] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 46.579792] RIP: 0033:0x4456c9 [ 46.582972] 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 [ 46.601880] RSP: 002b:00007f18b3ca0db8 EFLAGS: 00000246 ORIG_RAX: 0000000000000142 [ 46.609587] RAX: ffffffffffffffda RBX: 00000000006dac28 RCX: 00000000004456c9 [ 46.6