[....] Starting enhanced syslogd: rsyslogd[ 16.704282] audit: type=1400 audit(1519090678.469:5): avc: denied { syslog } for pid=4017 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: [ 22.496660] audit: type=1400 audit(1519090684.262:6): avc: denied { map } for pid=4157 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 '10.128.0.11' (ECDSA) to the list of known hosts. [ 28.858605] audit: type=1400 audit(1519090690.624:7): avc: denied { map } for pid=4171 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 01:38:10 parsed 1 programs 2018/02/20 01:38:10 executed programs: 0 [ 29.125693] audit: type=1400 audit(1519090690.891:8): avc: denied { map } for pid=4171 comm="syz-execprog" path="/root/syzkaller-shm867411060" 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 [ 29.140268] IPVS: ftp: loaded support on port[0] = 21 [ 29.371599] IPv6: ADDRCONF(NETDEV_UP): bridge0: link is not ready [ 29.776412] [ 29.778074] ===================================== [ 29.782888] WARNING: bad unlock balance detected! [ 29.787704] 4.16.0-rc1+ #232 Not tainted [ 29.791734] ------------------------------------- [ 29.796548] swapper/0/0 is trying to release lock (rcu_read_lock_bh) at: [ 29.803374] [] hashlimit_mt_common.isra.10+0x1beb/0x2610 [ 29.810359] but there are no more locks to release! [ 29.815346] [ 29.815346] other info that might help us debug this: [ 29.821987] 3 locks held by swapper/0/0: [ 29.826019] #0: ((&idev->mc_ifc_timer)){+.-.}, at: [<00000000bb50ac56>] call_timer_fn+0x1c6/0x820 [ 29.835191] #1: (rcu_read_lock){....}, at: [<000000009478cc1f>] mld_sendpack+0x180/0xe70 [ 29.843576] #2: (rcu_read_lock){....}, at: [<0000000084ddf3a1>] nf_hook.constprop.37+0x0/0x830 [ 29.852480] [ 29.852480] stack backtrace: [ 29.856955] CPU: 0 PID: 0 Comm: swapper/0 Not tainted 4.16.0-rc1+ #232 [ 29.863593] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 29.872920] Call Trace: [ 29.875484] [ 29.877617] dump_stack+0x194/0x257 [ 29.881221] ? arch_local_irq_restore+0x53/0x53 [ 29.885873] ? hashlimit_mt_common.isra.10+0x1beb/0x2610 [ 29.891303] print_unlock_imbalance_bug+0x12f/0x140 [ 29.896294] lock_release+0x6fe/0xa40 [ 29.900072] ? hashlimit_mt_common.isra.10+0x1beb/0x2610 [ 29.905497] ? lock_downgrade+0x980/0x980 [ 29.909617] ? lock_release+0xa40/0xa40 [ 29.913652] ? __raw_spin_lock_init+0x1c/0x100 [ 29.918207] ? do_raw_spin_trylock+0x190/0x190 [ 29.922771] hashlimit_mt_common.isra.10+0x1c08/0x2610 [ 29.928022] ? lock_downgrade+0x980/0x980 [ 29.932147] ? dsthash_find+0x5b0/0x5b0 [ 29.936096] ? __lock_acquire+0x664/0x3e00 [ 29.940305] ? is_bpf_text_address+0x7b/0x120 [ 29.944778] ? lock_downgrade+0x8da/0x980 [ 29.948906] ? unwind_dump+0x4d0/0x4d0 [ 29.953120] ? rcutorture_record_progress+0x10/0x10 [ 29.958114] ? x86_64_start_kernel+0x77/0x7a [ 29.962499] hashlimit_mt+0x78/0x90 [ 29.966100] ? hashlimit_mt+0x78/0x90 [ 29.969876] ip6t_do_table+0x98d/0x1a30 [ 29.973845] ? kmem_cache_alloc_trace+0x136/0x740 [ 29.978661] ? mld_sendpack+0x617/0xe70 [ 29.982616] ? ip6t_error+0x60/0x60 [ 29.986218] ? check_noncircular+0x20/0x20 [ 29.990428] ? lock_acquire+0x1d5/0x580 [ 29.994379] ? lock_acquire+0x1d5/0x580 [ 29.998334] ? igmp6_mcf_seq_next+0x660/0x660 [ 30.002818] ? lock_release+0xa40/0xa40 [ 30.006768] ip6table_raw_hook+0x65/0x80 [ 30.010809] nf_hook_slow+0xba/0x1a0 [ 30.014503] nf_hook.constprop.37+0x3f6/0x830 [ 30.018977] ? igmp6_mcf_seq_next+0x660/0x660 [ 30.023450] ? trace_hardirqs_on+0xd/0x10 [ 30.027577] ? __local_bh_enable_ip+0x121/0x230 [ 30.032229] ? _raw_spin_unlock_bh+0x30/0x40 [ 30.036614] ? rt6_uncached_list_add+0x1b7/0x240 [ 30.041366] ? rt6_fill_node+0x18b0/0x18b0 [ 30.045579] ? icmp6_dst_alloc+0x475/0x660 [ 30.049814] ? ip6_mc_leave_src+0x1d0/0x1d0 [ 30.054114] ? icmpv6_flow_init+0x1f6/0x270 [ 30.058423] mld_sendpack+0x6c2/0xe70 [ 30.062205] ? nf_hook.constprop.37+0x830/0x830 [ 30.066857] ? mark_held_locks+0xaf/0x100 [ 30.070983] ? trace_hardirqs_on+0xd/0x10 [ 30.075106] ? __local_bh_enable_ip+0x121/0x230 [ 30.079753] mld_ifc_timer_expire+0x3d9/0x770 [ 30.084232] call_timer_fn+0x228/0x820 [ 30.088099] ? mld_dad_timer_expire+0x100/0x100 [ 30.092746] ? process_timeout+0x40/0x40 [ 30.096788] ? __run_timers+0x7e3/0xb70 [ 30.100740] ? lock_downgrade+0x980/0x980 [ 30.104868] ? debug_object_deactivate+0x364/0x560 [ 30.109782] ? lock_release+0xa40/0xa40 [ 30.113734] ? do_raw_spin_trylock+0x190/0x190 [ 30.118299] ? trace_hardirqs_on_caller+0x19e/0x5c0 [ 30.123289] ? mld_dad_timer_expire+0x100/0x100 [ 30.127940] ? mld_dad_timer_expire+0x100/0x100 [ 30.132583] __run_timers+0x7ee/0xb70 [ 30.136369] ? trigger_dyntick_cpu.isra.29+0x150/0x150 [ 30.141627] ? timerqueue_add+0x1e9/0x280 [ 30.145752] ? check_noncircular+0x20/0x20 [ 30.149963] ? enqueue_hrtimer+0x177/0x4b0 [ 30.154177] ? lock_release+0xa40/0xa40 [ 30.158128] ? retrigger_next_event+0x1e0/0x1e0 [ 30.162785] ? find_held_lock+0x35/0x1d0 [ 30.166824] ? clockevents_program_event+0x163/0x2e0 [ 30.171906] ? lock_downgrade+0x980/0x980 [ 30.176057] ? rcu_pm_notify+0xc0/0xc0 [ 30.179936] run_timer_softirq+0x4c/0x70 [ 30.183984] __do_softirq+0x2d7/0xb85 [ 30.187764] ? ktime_get+0x26f/0x3a0 [ 30.191462] ? __irqentry_text_end+0x1f8ee4/0x1f8ee4 [ 30.196547] ? do_timer+0x50/0x50 [ 30.199979] ? native_apic_msr_write+0x5c/0x80 [ 30.204539] ? lapic_next_event+0x54/0x80 [ 30.208757] ? clockevents_program_event+0x108/0x2e0 [ 30.213845] ? tick_program_event+0x83/0x100 [ 30.219524] ? rcu_pm_notify+0xc0/0xc0 [ 30.223392] irq_exit+0x1cc/0x200 [ 30.226825] smp_apic_timer_interrupt+0x16b/0x700 [ 30.231642] ? smp_reschedule_interrupt+0xe6/0x650 [ 30.236546] ? smp_call_function_single_interrupt+0x640/0x640 [ 30.242405] ? _raw_spin_lock+0x32/0x40 [ 30.246361] ? _raw_spin_unlock+0x22/0x30 [ 30.250488] ? handle_edge_irq+0x2b4/0x7c0 [ 30.254698] ? task_prio+0x50/0x50 [ 30.258217] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 30.263038] apic_timer_interrupt+0xa9/0xb0 [ 30.267332] [ 30.269548] RIP: 0010:native_safe_halt+0x6/0x10 [ 30.274192] RSP: 0018:ffffffff86a07c38 EFLAGS: 00000286 ORIG_RAX: ffffffffffffff12 [ 30.281874] RAX: dffffc0000000000 RBX: 1ffffffff0d40f8a RCX: 0000000000000000 [ 30.289119] RDX: 1ffffffff0d592d0 RSI: 0000000000000001 RDI: ffffffff86ac9680 [ 30.296365] RBP: ffffffff86a07c38 R08: 0000000000000000 R09: 0000000000000000 [ 30.303612] R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000 [ 30.310862] R13: ffffffff86a07cf0 R14: ffffffff8726b6a0 R15: 0000000000000000 [ 30.318123] ? trace_hardirqs_on+0xd/0x10 [ 30.322252] default_idle+0xbf/0x430 [ 30.325941] ? __sched_text_end+0x4/0x4 [ 30.329896] ? rcu_eqs_special_set+0x1e0/0x1e0 [ 30.334463] ? tsc_verify_tsc_adjust+0xf6/0x3e0 [ 30.339108] ? set_cpu_sd_state_idle+0x1dc/0x2d0 [ 30.343838] ? mark_tsc_async_resets+0x30/0x30 [ 30.348397] arch_cpu_idle+0xa/0x10 [ 30.352002] default_idle_call+0x36/0x90 [ 30.356046] do_idle+0x24a/0x3b0 [ 30.359389] cpu_startup_entry+0x104/0x120 [ 30.363602] ? cpu_in_idle+0x20/0x20 [ 30.367289] ? trace_hardirqs_on_caller+0x421/0x5c0 [ 30.372282] ? trace_hardirqs_on+0xd/0x10 [ 30.376409] rest_init+0xed/0xf0 [ 30.379756] start_kernel+0x7f1/0x819 [ 30.383533] ? mem_encrypt_init+0xb/0xb [ 30.387480] ? early_idt_handler_common+0x3b/0x60 [ 30.392300] ? x86_family+0x32/0x40 [ 30.395905] x86_64_start_reservations+0x2a/0x2c [ 30.400638] x86_64_start_kernel+0x77/0x7a [ 30.404848] secondary_startup_64+0xa5/0xb0 2018/02/20 01:38:15 executed programs: 496 2018/02/20 01:38:20 executed programs: 1154