[....] Starting enhanced syslogd: rsyslogd[ 17.280405] audit: type=1400 audit(1519119579.762:5): avc: denied { syslog } for pid=4016 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: [ 22.363550] audit: type=1400 audit(1519119584.846:6): avc: denied { map } for pid=4156 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 '10.128.0.29' (ECDSA) to the list of known hosts. [ 28.659254] audit: type=1400 audit(1519119591.142:7): avc: denied { map } for pid=4170 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 09:39:51 parsed 1 programs 2018/02/20 09:39:51 executed programs: 0 [ 28.929949] audit: type=1400 audit(1519119591.412:8): avc: denied { map } for pid=4170 comm="syz-execprog" path="/root/syzkaller-shm116332748" 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 [ 28.944748] IPVS: ftp: loaded support on port[0] = 21 [ 29.181288] IPv6: ADDRCONF(NETDEV_UP): bridge0: link is not ready [ 29.615512] [ 29.617199] ===================================== [ 29.622048] WARNING: bad unlock balance detected! [ 29.626862] 4.16.0-rc2+ #320 Not tainted [ 29.630891] ------------------------------------- [ 29.635701] swapper/1/0 is trying to release lock (rcu_read_lock_bh) at: [ 29.642535] [] hashlimit_mt_common.isra.10+0x1beb/0x2610 [ 29.649524] but there are no more locks to release! [ 29.654505] [ 29.654505] other info that might help us debug this: [ 29.661139] 3 locks held by swapper/1/0: [ 29.665165] #0: ((&idev->mc_ifc_timer)){+.-.}, at: [<0000000094099f44>] call_timer_fn+0x1c6/0x820 [ 29.674331] #1: (rcu_read_lock){....}, at: [<00000000c1e0b920>] mld_sendpack+0x180/0xe70 [ 29.682724] #2: (rcu_read_lock){....}, at: [<000000005a0a58bd>] nf_hook.constprop.37+0x0/0x830 [ 29.691659] [ 29.691659] stack backtrace: [ 29.696175] CPU: 1 PID: 0 Comm: swapper/1 Not tainted 4.16.0-rc2+ #320 [ 29.702822] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 29.712175] Call Trace: [ 29.714752] [ 29.716896] dump_stack+0x194/0x257 [ 29.720499] ? arch_local_irq_restore+0x53/0x53 [ 29.725167] ? hashlimit_mt_common.isra.10+0x1beb/0x2610 [ 29.730595] print_unlock_imbalance_bug+0x12f/0x140 [ 29.735585] lock_release+0x6fe/0xa40 [ 29.739355] ? hashlimit_mt_common.isra.10+0x1beb/0x2610 [ 29.744776] ? lock_downgrade+0x980/0x980 [ 29.748903] ? lock_release+0xa40/0xa40 [ 29.752860] ? __raw_spin_lock_init+0x1c/0x100 [ 29.757414] ? do_raw_spin_trylock+0x190/0x190 [ 29.761991] hashlimit_mt_common.isra.10+0x1c08/0x2610 [ 29.767251] ? dsthash_find+0x5b0/0x5b0 [ 29.771206] ? __lock_acquire+0x664/0x3e00 [ 29.775416] ? secondary_startup_64+0xa5/0xb0 [ 29.779882] ? memset+0x31/0x40 [ 29.783135] ? unwind_dump+0x4d0/0x4d0 [ 29.786998] ? __unwind_start+0x169/0x330 [ 29.791127] hashlimit_mt+0x78/0x90 [ 29.794739] ? hashlimit_mt+0x78/0x90 [ 29.798531] ip6t_do_table+0x98d/0x1a30 [ 29.802495] ? kmem_cache_alloc_trace+0x136/0x740 [ 29.808183] ? mld_sendpack+0x617/0xe70 [ 29.812131] ? ip6t_error+0x60/0x60 [ 29.815731] ? check_noncircular+0x20/0x20 [ 29.819942] ? lock_acquire+0x1d5/0x580 [ 29.823887] ? lock_acquire+0x1d5/0x580 [ 29.827847] ? igmp6_mcf_seq_next+0x660/0x660 [ 29.832336] ? lock_release+0xa40/0xa40 [ 29.836289] ip6table_raw_hook+0x65/0x80 [ 29.840332] nf_hook_slow+0xba/0x1a0 [ 29.844024] nf_hook.constprop.37+0x3f6/0x830 [ 29.848509] ? igmp6_mcf_seq_next+0x660/0x660 [ 29.852979] ? trace_hardirqs_on+0xd/0x10 [ 29.857100] ? __local_bh_enable_ip+0x121/0x230 [ 29.861742] ? _raw_spin_unlock_bh+0x30/0x40 [ 29.866123] ? rt6_uncached_list_add+0x1b7/0x240 [ 29.870851] ? rt6_fill_node+0x18b0/0x18b0 [ 29.875057] ? icmp6_dst_alloc+0x475/0x660 [ 29.879265] ? ip6_mc_leave_src+0x1d0/0x1d0 [ 29.883557] ? icmpv6_flow_init+0x1f6/0x270 [ 29.887853] mld_sendpack+0x6c2/0xe70 [ 29.891631] ? nf_hook.constprop.37+0x830/0x830 [ 29.896278] ? mark_held_locks+0xaf/0x100 [ 29.900408] ? trace_hardirqs_on+0xd/0x10 [ 29.904532] ? __local_bh_enable_ip+0x121/0x230 [ 29.909174] mld_ifc_timer_expire+0x3d9/0x770 [ 29.913829] call_timer_fn+0x228/0x820 [ 29.917696] ? mld_dad_timer_expire+0x100/0x100 [ 29.922345] ? process_timeout+0x40/0x40 [ 29.926391] ? __run_timers+0x7e3/0xb70 [ 29.930343] ? lock_downgrade+0x980/0x980 [ 29.934464] ? debug_object_deactivate+0x364/0x560 [ 29.939375] ? lock_release+0xa40/0xa40 [ 29.943338] ? do_raw_spin_trylock+0x190/0x190 [ 29.947901] ? trace_hardirqs_on_caller+0x19e/0x5c0 [ 29.952906] ? mld_dad_timer_expire+0x100/0x100 [ 29.957558] ? mld_dad_timer_expire+0x100/0x100 [ 29.962204] __run_timers+0x7ee/0xb70 [ 29.965980] ? trigger_dyntick_cpu.isra.29+0x150/0x150 [ 29.971236] ? timerqueue_add+0x1e9/0x280 [ 29.975360] ? check_noncircular+0x20/0x20 [ 29.979590] ? enqueue_hrtimer+0x177/0x4b0 [ 29.983802] ? lock_release+0xa40/0xa40 [ 29.987756] ? retrigger_next_event+0x1e0/0x1e0 [ 29.992420] ? find_held_lock+0x35/0x1d0 [ 29.996474] ? clockevents_program_event+0x163/0x2e0 [ 30.001565] ? lock_downgrade+0x980/0x980 [ 30.005696] ? rcu_pm_notify+0xc0/0xc0 [ 30.009572] run_timer_softirq+0x4c/0x70 [ 30.013610] __do_softirq+0x2d7/0xb85 [ 30.017389] ? ktime_get+0x26f/0x3a0 [ 30.021100] ? __irqentry_text_end+0x1f8ad4/0x1f8ad4 [ 30.026195] ? do_timer+0x50/0x50 [ 30.029628] ? native_apic_msr_write+0x5c/0x80 [ 30.034186] ? lapic_next_event+0x54/0x80 [ 30.038319] ? clockevents_program_event+0x108/0x2e0 [ 30.043410] ? tick_program_event+0x83/0x100 [ 30.047799] ? rcu_pm_notify+0xc0/0xc0 [ 30.051664] irq_exit+0x1cc/0x200 [ 30.055090] smp_apic_timer_interrupt+0x16b/0x700 [ 30.059900] ? smp_reschedule_interrupt+0xe6/0x650 [ 30.064800] ? smp_call_function_single_interrupt+0x640/0x640 [ 30.070666] ? _raw_spin_lock+0x32/0x40 [ 30.074622] ? _raw_spin_unlock+0x22/0x30 [ 30.078746] ? handle_edge_irq+0x2b4/0x7c0 [ 30.082956] ? task_prio+0x50/0x50 [ 30.086499] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 30.091345] apic_timer_interrupt+0x8e/0xa0 [ 30.095656] [ 30.097899] RIP: 0010:native_safe_halt+0x6/0x10 [ 30.102541] RSP: 0018:ffff8801d9f1fcb0 EFLAGS: 00000282 ORIG_RAX: ffffffffffffff12 [ 30.110224] RAX: dffffc0000000000 RBX: 1ffff1003b3e3f99 RCX: 0000000000000000 [ 30.117467] RDX: 1ffffffff0d592d8 RSI: 0000000000000001 RDI: ffffffff86ac96c0 [ 30.124709] RBP: ffff8801d9f1fcb0 R08: 0000000000000000 R09: 0000000000000000 [ 30.131958] R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000001 [ 30.139208] R13: ffff8801d9f1fd68 R14: ffffffff8726ac60 R15: 0000000000000000 [ 30.146468] default_idle+0xbf/0x430 [ 30.150154] ? __sched_text_end+0x4/0x4 [ 30.154111] ? rcu_eqs_special_set+0x1e0/0x1e0 [ 30.158674] ? tsc_verify_tsc_adjust+0xf6/0x3e0 [ 30.163318] ? set_cpu_sd_state_idle+0x1dc/0x2d0 [ 30.168052] ? mark_tsc_async_resets+0x30/0x30 [ 30.172617] arch_cpu_idle+0xa/0x10 [ 30.176228] default_idle_call+0x36/0x90 [ 30.180258] do_idle+0x24a/0x3b0 [ 30.183596] cpu_startup_entry+0x104/0x120 [ 30.187809] ? cpu_in_idle+0x20/0x20 [ 30.191498] start_secondary+0x40a/0x590 [ 30.195540] ? set_cpu_sibling_map+0x1660/0x1660 [ 30.200279] secondary_startup_64+0xa5/0xb0 2018/02/20 09:39:56 executed programs: 414 2018/02/20 09:40:01 executed programs: 969