[....] Starting enhanced syslogd: rsyslogd[ 15.676177] audit: type=1400 audit(1519081276.792:5): avc: denied { syslog } for pid=4007 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 mcstransd: [....] Starting periodic command scheduler: cron[?25l[?1c7[ ok 8[?25h[?0c. [....] 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: [ 18.728619] audit: type=1400 audit(1519081279.845:6): avc: denied { map } for pid=4146 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 '10.128.0.6' (ECDSA) to the list of known hosts. [ 24.995617] audit: type=1400 audit(1519081286.112:7): avc: denied { map } for pid=4160 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 2018/02/19 23:01:26 parsed 1 programs 2018/02/19 23:01:26 executed programs: 0 [ 25.259295] audit: type=1400 audit(1519081286.375:8): avc: denied { map } for pid=4160 comm="syz-execprog" path="/root/syzkaller-shm955215097" 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 [ 25.272315] IPVS: ftp: loaded support on port[0] = 21 [ 25.499512] IPv6: ADDRCONF(NETDEV_UP): bridge0: link is not ready [ 25.951343] [ 25.953029] ===================================== [ 25.957841] WARNING: bad unlock balance detected! [ 25.962654] 4.16.0-rc2+ #320 Not tainted [ 25.966682] ------------------------------------- [ 25.971491] swapper/0/0 is trying to release lock (rcu_read_lock_bh) at: [ 25.978310] [] hashlimit_mt_common.isra.10+0x1beb/0x2610 [ 25.985291] but there are no more locks to release! [ 25.990275] [ 25.990275] other info that might help us debug this: [ 25.996912] 3 locks held by swapper/0/0: [ 26.000939] #0: ((&idev->mc_ifc_timer)){+.-.}, at: [<000000002a9aa19d>] call_timer_fn+0x1c6/0x820 [ 26.010099] #1: (rcu_read_lock){....}, at: [<000000007a22e00a>] mld_sendpack+0x180/0xe70 [ 26.018477] #2: (rcu_read_lock){....}, at: [<0000000007282274>] nf_hook.constprop.37+0x0/0x830 [ 26.027376] [ 26.027376] stack backtrace: [ 26.031844] CPU: 0 PID: 0 Comm: swapper/0 Not tainted 4.16.0-rc2+ #320 [ 26.038477] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 26.047799] Call Trace: [ 26.050358] [ 26.052484] dump_stack+0x194/0x257 [ 26.056086] ? arch_local_irq_restore+0x53/0x53 [ 26.060727] ? hashlimit_mt_common.isra.10+0x1beb/0x2610 [ 26.066151] print_unlock_imbalance_bug+0x12f/0x140 [ 26.071138] lock_release+0x6fe/0xa40 [ 26.074913] ? hashlimit_mt_common.isra.10+0x1beb/0x2610 [ 26.080335] ? lock_downgrade+0x980/0x980 [ 26.084455] ? lock_release+0xa40/0xa40 [ 26.088399] ? __raw_spin_lock_init+0x1c/0x100 [ 26.092950] ? do_raw_spin_trylock+0x190/0x190 [ 26.097506] hashlimit_mt_common.isra.10+0x1c08/0x2610 [ 26.102752] ? lock_downgrade+0x980/0x980 [ 26.106873] ? dsthash_find+0x5b0/0x5b0 [ 26.110818] ? __lock_acquire+0x664/0x3e00 [ 26.115026] ? is_bpf_text_address+0x7b/0x120 [ 26.119491] ? lock_downgrade+0x95a/0x980 [ 26.123615] ? unwind_dump+0x4d0/0x4d0 [ 26.127475] ? rcutorture_record_progress+0x10/0x10 [ 26.132466] ? x86_64_start_kernel+0x77/0x7a [ 26.136847] hashlimit_mt+0x78/0x90 [ 26.140445] ? hashlimit_mt+0x78/0x90 [ 26.144217] ip6t_do_table+0x98d/0x1a30 [ 26.148165] ? kmem_cache_alloc_trace+0x136/0x740 [ 26.152981] ? mld_sendpack+0x617/0xe70 [ 26.156928] ? ip6t_error+0x60/0x60 [ 26.160526] ? check_noncircular+0x20/0x20 [ 26.164732] ? lock_acquire+0x1d5/0x580 [ 26.168677] ? lock_acquire+0x1d5/0x580 [ 26.172624] ? igmp6_mcf_seq_next+0x660/0x660 [ 26.177091] ? lock_release+0xa40/0xa40 [ 26.181035] ip6table_raw_hook+0x65/0x80 [ 26.185068] nf_hook_slow+0xba/0x1a0 [ 26.188756] nf_hook.constprop.37+0x3f6/0x830 [ 26.193223] ? igmp6_mcf_seq_next+0x660/0x660 [ 26.197689] ? trace_hardirqs_on+0xd/0x10 [ 26.201811] ? __local_bh_enable_ip+0x121/0x230 [ 26.206451] ? _raw_spin_unlock_bh+0x30/0x40 [ 26.210834] ? rt6_uncached_list_add+0x1b7/0x240 [ 26.215562] ? rt6_fill_node+0x18b0/0x18b0 [ 26.219770] ? icmp6_dst_alloc+0x475/0x660 [ 26.223977] ? ip6_mc_leave_src+0x1d0/0x1d0 [ 26.228271] ? icmpv6_flow_init+0x1f6/0x270 [ 26.232575] mld_sendpack+0x6c2/0xe70 [ 26.236355] ? nf_hook.constprop.37+0x830/0x830 [ 26.240997] ? mark_held_locks+0xaf/0x100 [ 26.245121] ? trace_hardirqs_on+0xd/0x10 [ 26.249240] ? __local_bh_enable_ip+0x121/0x230 [ 26.253881] mld_ifc_timer_expire+0x3d9/0x770 [ 26.258353] call_timer_fn+0x228/0x820 [ 26.262210] ? mld_dad_timer_expire+0x100/0x100 [ 26.266851] ? process_timeout+0x40/0x40 [ 26.270891] ? __run_timers+0x7e3/0xb70 [ 26.274836] ? lock_downgrade+0x980/0x980 [ 26.278957] ? debug_object_deactivate+0x364/0x560 [ 26.283857] ? lock_release+0xa40/0xa40 [ 26.287804] ? do_raw_spin_trylock+0x190/0x190 [ 26.292362] ? trace_hardirqs_on_caller+0x19e/0x5c0 [ 26.297350] ? mld_dad_timer_expire+0x100/0x100 [ 26.301990] ? mld_dad_timer_expire+0x100/0x100 [ 26.306632] __run_timers+0x7ee/0xb70 [ 26.310406] ? trigger_dyntick_cpu.isra.29+0x150/0x150 [ 26.315654] ? timerqueue_add+0x1e9/0x280 [ 26.319771] ? check_noncircular+0x20/0x20 [ 26.323977] ? enqueue_hrtimer+0x177/0x4b0 [ 26.328182] ? lock_release+0xa40/0xa40 [ 26.332127] ? retrigger_next_event+0x1e0/0x1e0 [ 26.336768] ? find_held_lock+0x35/0x1d0 [ 26.340804] ? clockevents_program_event+0x163/0x2e0 [ 26.345877] ? lock_downgrade+0x980/0x980 [ 26.349999] ? rcu_pm_notify+0xc0/0xc0 [ 26.353864] run_timer_softirq+0x4c/0x70 [ 26.357895] __do_softirq+0x2d7/0xb85 [ 26.361665] ? ktime_get+0x26f/0x3a0 [ 26.365357] ? __irqentry_text_end+0x1f8ad4/0x1f8ad4 [ 26.370433] ? do_timer+0x50/0x50 [ 26.373858] ? native_apic_msr_write+0x5c/0x80 [ 26.378410] ? lapic_next_event+0x54/0x80 [ 26.382529] ? clockevents_program_event+0x108/0x2e0 [ 26.387603] ? tick_program_event+0x83/0x100 [ 26.391982] ? rcu_pm_notify+0xc0/0xc0 [ 26.395843] irq_exit+0x1cc/0x200 [ 26.399268] smp_apic_timer_interrupt+0x16b/0x700 [ 26.404082] ? smp_reschedule_interrupt+0xe6/0x650 [ 26.408981] ? smp_call_function_single_interrupt+0x640/0x640 [ 26.414837] ? _raw_spin_lock+0x32/0x40 [ 26.418782] ? _raw_spin_unlock+0x22/0x30 [ 26.422904] ? handle_edge_irq+0x2b4/0x7c0 [ 26.427113] ? task_prio+0x50/0x50 [ 26.430626] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 26.435442] apic_timer_interrupt+0x8e/0xa0 [ 26.439731] [ 26.441942] RIP: 0010:native_safe_halt+0x6/0x10 [ 26.446578] RSP: 0018:ffffffff86a07c38 EFLAGS: 00000282 ORIG_RAX: ffffffffffffff12 [ 26.454255] RAX: dffffc0000000000 RBX: 1ffffffff0d40f8a RCX: 0000000000000000 [ 26.461497] RDX: 1ffffffff0d592d8 RSI: 0000000000000001 RDI: ffffffff86ac96c0 [ 26.468736] RBP: ffffffff86a07c38 R08: 0000000000000000 R09: 0000000000000000 [ 26.475975] R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000 [ 26.483216] R13: ffffffff86a07cf0 R14: ffffffff8726ac60 R15: 0000000000000000 [ 26.490468] ? trace_hardirqs_on+0xd/0x10 [ 26.494587] default_idle+0xbf/0x430 [ 26.498271] ? __sched_text_end+0x4/0x4 [ 26.502217] ? rcu_eqs_special_set+0x1e0/0x1e0 [ 26.506769] ? tsc_verify_tsc_adjust+0xf6/0x3e0 [ 26.511410] ? set_cpu_sd_state_idle+0x1dc/0x2d0 [ 26.516135] ? mark_tsc_async_resets+0x30/0x30 [ 26.520691] arch_cpu_idle+0xa/0x10 [ 26.524289] default_idle_call+0x36/0x90 [ 26.528321] do_idle+0x24a/0x3b0 [ 26.531666] cpu_startup_entry+0x104/0x120 [ 26.535873] ? cpu_in_idle+0x20/0x20 [ 26.539558] ? trace_hardirqs_on_caller+0x421/0x5c0 [ 26.544543] ? trace_hardirqs_on+0xd/0x10 [ 26.548662] rest_init+0xed/0xf0 [ 26.552000] start_kernel+0x7f1/0x819 [ 26.555772] ? mem_encrypt_init+0xb/0xb [ 26.559717] ? early_idt_handler_common+0x3b/0x60 [ 26.564533] ? x86_family+0x32/0x40 [ 26.568133] x86_64_start_reservations+0x2a/0x2c [ 26.572861] x86_64_start_kernel+0x77/0x7a [ 26.577065] secondary_startup_64+0xa5/0xb0 2018/02/19 23:01:31 executed programs: 504 2018/02/19 23:01:36 executed programs: 1169