[....] 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[ 34.424241] kauditd_printk_skb: 9 callbacks suppressed [?25l[?1c7[1[ 34.424255] audit: type=1800 audit(1543357262.827:33): pid=6053 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 G[ ok [39;[ 34.453248] audit: type=1800 audit(1543357262.867:34): pid=6053 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 49m8[?25h[?0c. Debian GNU/Linux 7 syzkaller ttyS0 syzkaller login: [ 38.359446] audit: type=1400 audit(1543357266.767:35): avc: denied { map } for pid=6230 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 '10.128.0.56' (ECDSA) to the list of known hosts. executing program [ 45.208233] audit: type=1400 audit(1543357273.617:36): avc: denied { map } for pid=6243 comm="syz-executor942" path="/root/syz-executor942141146" 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 [ 45.236799] [ 45.238847] ==================================== [ 45.243591] WARNING: syz-executor942/6244 still has locks held! [ 45.249654] 4.20.0-rc4+ #132 Not tainted [ 45.253707] ------------------------------------ [ 45.258623] 1 lock held by syz-executor942/6244: [ 45.263374] #0: 00000000e97209a4 (&sig->cred_guard_mutex){+.+.}, at: prepare_bprm_creds+0x53/0x120 [ 45.272581] [ 45.272581] stack backtrace: [ 45.277081] CPU: 1 PID: 6244 Comm: syz-executor942 Not tainted 4.20.0-rc4+ #132 [ 45.284508] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 45.293843] Call Trace: [ 45.296416] dump_stack+0x244/0x39d [ 45.300028] ? dump_stack_print_info.cold.1+0x20/0x20 [ 45.305203] ? vprintk_func+0x85/0x181 [ 45.309082] debug_check_no_locks_held.cold.49+0x93/0x9f [ 45.314517] flush_old_exec+0x1ea2/0x2480 [ 45.318650] ? save_stack+0x43/0xd0 [ 45.322263] ? copy_strings_kernel+0x110/0x110 [ 45.326827] ? iov_iter_init+0xe5/0x210 [ 45.330784] ? __sanitizer_cov_trace_const_cmp8+0x18/0x20 [ 45.336303] ? __vfs_read+0x11f/0x9b0 [ 45.340109] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 45.345632] ? fsnotify+0x50e/0xef0 [ 45.349243] ? fsnotify+0xef0/0xef0 [ 45.352851] ? fsnotify_first_mark+0x350/0x350 [ 45.357415] ? __fsnotify_parent+0xcc/0x430 [ 45.361717] ? fsnotify+0xef0/0xef0 [ 45.365329] ? rw_verify_area+0x118/0x360 [ 45.369462] ? vfs_read+0x1ce/0x3c0 [ 45.373075] ? kernel_read+0xab/0x120 [ 45.376859] ? __sanitizer_cov_trace_cmp4+0x16/0x20 [ 45.381855] ? load_elf_phdrs+0x1e4/0x270 [ 45.385982] ? writenote+0x3d0/0x3d0 [ 45.389691] ? __kasan_slab_free+0x119/0x150 [ 45.394083] load_elf_binary+0xa9a/0x5cf0 [ 45.398218] ? find_held_lock+0x36/0x1c0 [ 45.402266] ? notesize.isra.6+0x80/0x80 [ 45.406307] ? ima_file_mmap+0x160/0x160 [ 45.410351] ? lock_downgrade+0x900/0x900 [ 45.414485] ? kasan_check_write+0x14/0x20 [ 45.418708] search_binary_handler+0x17d/0x570 [ 45.423272] __do_execve_file.isra.33+0x1661/0x25d0 [ 45.428286] ? prepare_bprm_creds+0x120/0x120 [ 45.432766] ? usercopy_warn+0x110/0x110 [ 45.436811] ? check_preemption_disabled+0x48/0x280 [ 45.441832] ? rcu_lockdep_current_cpu_online+0x1a4/0x210 [ 45.447356] ? __sanitizer_cov_trace_const_cmp8+0x18/0x20 [ 45.452878] ? strncpy_from_user+0x411/0x5a0 [ 45.457268] ? digsig_verify+0x1530/0x1530 [ 45.461485] ? kmem_cache_alloc+0x33a/0x730 [ 45.465791] ? lockdep_hardirqs_on+0x3bb/0x5b0 [ 45.470358] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 45.475879] __x64_sys_execveat+0xed/0x130 [ 45.480098] do_syscall_64+0x1b9/0x820 [ 45.483967] ? entry_SYSCALL_64_after_hwframe+0x3e/0xbe [ 45.489318] ? syscall_return_slowpath+0x5e0/0x5e0 [ 45.494228] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 45.499054] ? trace_hardirqs_on_caller+0x310/0x310 [ 45.504053] ? prepare_exit_to_usermode+0x3b0/0x3b0 [ 45.509055] ? prepare_exit_to_usermode+0x291/0x3b0 [ 45.514058] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 45.518885] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 45.524056] RIP: 0033:0x445629 [ 45.527230] 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 [ 45.546114] RSP: 002b:00007fecb5df2da8 EFLAGS: 00000246 ORIG_RAX: 0000000000000142 [ 45.553818] RAX: ffffffffffffffda RBX: 00000000006dac28 RCX: 000000000