[....] Starting enhanced syslogd: rsyslogd[ 15.777556] audit: type=1400 audit(1519115372.743:5): avc: denied { syslog } for pid=3883 comm="rsyslogd" capability=34 scontext=system_u:system_r:kernel_t:s0 tcontext=system_u:system_r:kernel_t:s0 tclass=capability2 permissive=1 [?25l[?1c7[ ok 8[?25h[?0c. [....] Starting periodic command scheduler: cron[?25l[?1c7[ ok 8[?25h[?0c. Starting mcstransd: [....] Starting file context maintaining daemon: restorecond[?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: [ 18.189624] audit: type=1400 audit(1519115375.155:6): avc: denied { map } for pid=4022 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 '10.128.0.17' (ECDSA) to the list of known hosts. [ 24.492094] audit: type=1400 audit(1519115381.457:7): avc: denied { map } for pid=4036 comm="syz-execprog" path="/root/syz-execprog" dev="sda1" ino=16479 scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=unconfined_u:object_r:user_home_t:s0 tclass=file permissive=1 2018/02/20 08:29:41 parsed 1 programs 2018/02/20 08:29:41 executed programs: 0 [ 24.752396] audit: type=1400 audit(1519115381.717:8): avc: denied { map } for pid=4036 comm="syz-execprog" path="/root/syzkaller-shm961632964" dev="sda1" ino=16482 scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=unconfined_u:object_r:file_t:s0 tclass=file permissive=1 [ 24.765071] IPVS: ftp: loaded support on port[0] = 21 [ 24.986469] IPv6: ADDRCONF(NETDEV_UP): bridge0: link is not ready [ 25.424389] [ 25.426046] ===================================== [ 25.430858] WARNING: bad unlock balance detected! [ 25.435672] 4.16.0-rc2+ #320 Not tainted [ 25.439703] ------------------------------------- [ 25.444514] swapper/0/0 is trying to release lock (rcu_read_lock_bh) at: [ 25.451336] [] hashlimit_mt_common.isra.10+0x1beb/0x2610 [ 25.458317] but there are no more locks to release! [ 25.463303] [ 25.463303] other info that might help us debug this: [ 25.469942] 3 locks held by swapper/0/0: [ 25.473975] #0: ((&idev->mc_ifc_timer)){+.-.}, at: [<000000008a43ab27>] call_timer_fn+0x1c6/0x820 [ 25.483140] #1: (rcu_read_lock){....}, at: [<00000000364e391e>] mld_sendpack+0x180/0xe70 [ 25.491521] #2: (rcu_read_lock){....}, at: [<00000000f69590e7>] nf_hook.constprop.37+0x0/0x830 [ 25.500423] [ 25.500423] stack backtrace: [ 25.504896] CPU: 0 PID: 0 Comm: swapper/0 Not tainted 4.16.0-rc2+ #320 [ 25.511532] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 25.520860] Call Trace: [ 25.523415] [ 25.525545] dump_stack+0x194/0x257 [ 25.529146] ? arch_local_irq_restore+0x53/0x53 [ 25.533790] ? hashlimit_mt_common.isra.10+0x1beb/0x2610 [ 25.539217] print_unlock_imbalance_bug+0x12f/0x140 [ 25.544206] lock_release+0x6fe/0xa40 [ 25.547981] ? hashlimit_mt_common.isra.10+0x1beb/0x2610 [ 25.553405] ? lock_downgrade+0x980/0x980 [ 25.557528] ? lock_release+0xa40/0xa40 [ 25.561477] ? __raw_spin_lock_init+0x1c/0x100 [ 25.566034] ? do_raw_spin_trylock+0x190/0x190 [ 25.570594] hashlimit_mt_common.isra.10+0x1c08/0x2610 [ 25.575842] ? lock_downgrade+0x980/0x980 [ 25.579968] ? dsthash_find+0x5b0/0x5b0 [ 25.583917] ? __lock_acquire+0x664/0x3e00 [ 25.588126] ? is_bpf_text_address+0x7b/0x120 [ 25.592592] ? lock_downgrade+0x95a/0x980 [ 25.596717] ? unwind_dump+0x4d0/0x4d0 [ 25.600577] ? rcutorture_record_progress+0x10/0x10 [ 25.605573] ? x86_64_start_kernel+0x77/0x7a [ 25.609959] hashlimit_mt+0x78/0x90 [ 25.613559] ? hashlimit_mt+0x78/0x90 [ 25.617333] ip6t_do_table+0x98d/0x1a30 [ 25.621284] ? kmem_cache_alloc_trace+0x136/0x740 [ 25.626103] ? mld_sendpack+0x617/0xe70 [ 25.630056] ? ip6t_error+0x60/0x60 [ 25.633658] ? check_noncircular+0x20/0x20 [ 25.637867] ? lock_acquire+0x1d5/0x580 [ 25.641817] ? lock_acquire+0x1d5/0x580 [ 25.645764] ? igmp6_mcf_seq_next+0x660/0x660 [ 25.650233] ? lock_release+0xa40/0xa40 [ 25.654183] ip6table_raw_hook+0x65/0x80 [ 25.658223] nf_hook_slow+0xba/0x1a0 [ 25.661915] nf_hook.constprop.37+0x3f6/0x830 [ 25.666385] ? igmp6_mcf_seq_next+0x660/0x660 [ 25.670855] ? trace_hardirqs_on+0xd/0x10 [ 25.674980] ? __local_bh_enable_ip+0x121/0x230 [ 25.679624] ? _raw_spin_unlock_bh+0x30/0x40 [ 25.684006] ? rt6_uncached_list_add+0x1b7/0x240 [ 25.688736] ? rt6_fill_node+0x18b0/0x18b0 [ 25.692946] ? icmp6_dst_alloc+0x475/0x660 [ 25.697155] ? ip6_mc_leave_src+0x1d0/0x1d0 [ 25.701451] ? icmpv6_flow_init+0x1f6/0x270 [ 25.705746] mld_sendpack+0x6c2/0xe70 [ 25.709522] ? nf_hook.constprop.37+0x830/0x830 [ 25.714164] ? mark_held_locks+0xaf/0x100 [ 25.718290] ? trace_hardirqs_on+0xd/0x10 [ 25.722410] ? __local_bh_enable_ip+0x121/0x230 [ 25.727052] mld_ifc_timer_expire+0x3d9/0x770 [ 25.731525] call_timer_fn+0x228/0x820 [ 25.735385] ? mld_dad_timer_expire+0x100/0x100 [ 25.740026] ? process_timeout+0x40/0x40 [ 25.744061] ? __run_timers+0x7e3/0xb70 [ 25.748008] ? lock_downgrade+0x980/0x980 [ 25.752134] ? debug_object_deactivate+0x364/0x560 [ 25.757039] ? lock_release+0xa40/0xa40 [ 25.760989] ? do_raw_spin_trylock+0x190/0x190 [ 25.765548] ? trace_hardirqs_on_caller+0x19e/0x5c0 [ 25.770536] ? mld_dad_timer_expire+0x100/0x100 [ 25.775176] ? mld_dad_timer_expire+0x100/0x100 [ 25.779820] __run_timers+0x7ee/0xb70 [ 25.783599] ? trigger_dyntick_cpu.isra.29+0x150/0x150 [ 25.788853] ? timerqueue_add+0x1e9/0x280 [ 25.792979] ? check_noncircular+0x20/0x20 [ 25.797191] ? enqueue_hrtimer+0x177/0x4b0 [ 25.801397] ? lock_release+0xa40/0xa40 [ 25.805345] ? retrigger_next_event+0x1e0/0x1e0 [ 25.809989] ? find_held_lock+0x35/0x1d0 [ 25.814030] ? clockevents_program_event+0x163/0x2e0 [ 25.819105] ? lock_downgrade+0x980/0x980 [ 25.823228] ? rcu_pm_notify+0xc0/0xc0 [ 25.827090] run_timer_softirq+0x4c/0x70 [ 25.831126] __do_softirq+0x2d7/0xb85 [ 25.835650] ? ktime_get+0x26f/0x3a0 [ 25.839356] ? __irqentry_text_end+0x1f8ad4/0x1f8ad4 [ 25.844432] ? do_timer+0x50/0x50 [ 25.847865] ? native_apic_msr_write+0x5c/0x80 [ 25.852426] ? lapic_next_event+0x54/0x80 [ 25.856548] ? clockevents_program_event+0x108/0x2e0 [ 25.861625] ? tick_program_event+0x83/0x100 [ 25.866010] ? rcu_pm_notify+0xc0/0xc0 [ 25.869879] irq_exit+0x1cc/0x200 [ 25.873309] smp_apic_timer_interrupt+0x16b/0x700 [ 25.878126] ? smp_reschedule_interrupt+0xe6/0x650 [ 25.883028] ? smp_call_function_single_interrupt+0x640/0x640 [ 25.888887] ? _raw_spin_lock+0x32/0x40 [ 25.892836] ? _raw_spin_unlock+0x22/0x30 [ 25.896962] ? handle_edge_irq+0x2b4/0x7c0 [ 25.901172] ? task_prio+0x50/0x50 [ 25.904691] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 25.909508] apic_timer_interrupt+0x8e/0xa0 [ 25.913800] [ 25.916010] RIP: 0010:native_safe_halt+0x6/0x10 [ 25.920652] RSP: 0018:ffffffff86a07c38 EFLAGS: 00000282 ORIG_RAX: ffffffffffffff12 [ 25.928333] RAX: dffffc0000000000 RBX: 1ffffffff0d40f8a RCX: 0000000000000000 [ 25.935576] RDX: 1ffffffff0d592d8 RSI: 0000000000000001 RDI: ffffffff86ac96c0 [ 25.942820] RBP: ffffffff86a07c38 R08: 0000000000000000 R09: 0000000000000000 [ 25.950064] R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000 [ 25.957308] R13: ffffffff86a07cf0 R14: ffffffff8726ac60 R15: 0000000000000000 [ 25.964560] ? trace_hardirqs_on+0xd/0x10 [ 25.968681] default_idle+0xbf/0x430 [ 25.972368] ? __sched_text_end+0x4/0x4 [ 25.976318] ? rcu_eqs_special_set+0x1e0/0x1e0 [ 25.980872] ? tsc_verify_tsc_adjust+0xf6/0x3e0 [ 25.985513] ? set_cpu_sd_state_idle+0x1dc/0x2d0 [ 25.990240] ? mark_tsc_async_resets+0x30/0x30 [ 25.994797] arch_cpu_idle+0xa/0x10 [ 25.998397] default_idle_call+0x36/0x90 [ 26.002430] do_idle+0x24a/0x3b0 [ 26.005771] cpu_startup_entry+0x104/0x120 [ 26.009981] ? cpu_in_idle+0x20/0x20 [ 26.013670] ? trace_hardirqs_on_caller+0x421/0x5c0 [ 26.018659] ? trace_hardirqs_on+0xd/0x10 [ 26.022785] rest_init+0xed/0xf0 [ 26.026128] start_kernel+0x7f1/0x819 [ 26.029900] ? mem_encrypt_init+0xb/0xb [ 26.033850] ? early_idt_handler_common+0x3b/0x60 [ 26.038668] ? x86_family+0x32/0x40 [ 26.042281] x86_64_start_reservations+0x2a/0x2c [ 26.047014] x86_64_start_kernel+0x77/0x7a [ 26.051221] secondary_startup_64+0xa5/0xb0 2018/02/20 08:29:46 executed programs: 607 2018/02/20 08:29:51 executed programs: 1432