[....] Starting enhanced syslogd: rsyslogd[ 15.682238] audit: type=1400 audit(1519112580.356:5): avc: denied { syslog } for pid=4009 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: [ 18.375129] audit: type=1400 audit(1519112583.048:6): avc: denied { map } for pid=4149 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 '10.128.0.37' (ECDSA) to the list of known hosts. [ 24.610844] audit: type=1400 audit(1519112589.284:7): avc: denied { map } for pid=4163 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 07:43:09 parsed 1 programs 2018/02/20 07:43:09 executed programs: 0 [ 24.873133] audit: type=1400 audit(1519112589.546:8): avc: denied { map } for pid=4163 comm="syz-execprog" path="/root/syzkaller-shm173290499" 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 [ 24.886469] IPVS: ftp: loaded support on port[0] = 21 [ 25.105325] IPv6: ADDRCONF(NETDEV_UP): bridge0: link is not ready [ 25.865431] [ 25.867070] ===================================== [ 25.871887] WARNING: bad unlock balance detected! [ 25.876700] 4.16.0-rc2+ #320 Not tainted [ 25.880729] ------------------------------------- [ 25.885544] kworker/0:1/23 is trying to release lock (rcu_read_lock_bh) at: [ 25.892624] [] hashlimit_mt_common.isra.10+0x1beb/0x2610 [ 25.899601] but there are no more locks to release! [ 25.904584] [ 25.904584] other info that might help us debug this: [ 25.911219] 5 locks held by kworker/0:1/23: [ 25.915508] #0: ((wq_completion)"%s"("ipv6_addrconf")){+.+.}, at: [<00000000741c6e26>] process_one_work+0xaaf/0x1af0 [ 25.926323] #1: ((work_completion)(&(&ifa->dad_work)->work)){+.+.}, at: [<000000005272785e>] process_one_work+0xb01/0x1af0 [ 25.937653] #2: (rtnl_mutex){+.+.}, at: [<00000000be870c5b>] rtnl_lock+0x17/0x20 [ 25.945335] #3: (rcu_read_lock){....}, at: [<000000009addd561>] ndisc_send_skb+0x826/0x1370 [ 25.953971] #4: (rcu_read_lock){....}, at: [<0000000060319f94>] nf_hook.constprop.27+0x0/0x830 [ 25.962870] [ 25.962870] stack backtrace: [ 25.967337] CPU: 0 PID: 23 Comm: kworker/0:1 Not tainted 4.16.0-rc2+ #320 [ 25.974228] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 25.983558] Workqueue: ipv6_addrconf addrconf_dad_work [ 25.988800] Call Trace: [ 25.991357] dump_stack+0x194/0x257 [ 25.994953] ? arch_local_irq_restore+0x53/0x53 [ 25.999595] ? hashlimit_mt_common.isra.10+0x1beb/0x2610 [ 26.005020] print_unlock_imbalance_bug+0x12f/0x140 [ 26.010010] lock_release+0x6fe/0xa40 [ 26.013783] ? hashlimit_mt_common.isra.10+0x1beb/0x2610 [ 26.019202] ? lock_downgrade+0x980/0x980 [ 26.023317] ? lock_release+0xa40/0xa40 [ 26.027259] ? __raw_spin_lock_init+0x1c/0x100 [ 26.031808] ? do_raw_spin_trylock+0x190/0x190 [ 26.036365] hashlimit_mt_common.isra.10+0x1c08/0x2610 [ 26.041614] ? dsthash_find+0x5b0/0x5b0 [ 26.045557] ? __lock_acquire+0x664/0x3e00 [ 26.049761] ? ret_from_fork+0x3a/0x50 [ 26.053623] ? print_irqtrace_events+0x270/0x270 [ 26.058352] ? __unwind_start+0x169/0x330 [ 26.062470] hashlimit_mt+0x78/0x90 [ 26.066065] ? hashlimit_mt+0x78/0x90 [ 26.069834] ip6t_do_table+0x98d/0x1a30 [ 26.073780] ? debug_check_no_locks_freed+0x3c0/0x3c0 [ 26.078943] ? ip6t_error+0x60/0x60 [ 26.082544] ? check_noncircular+0x20/0x20 [ 26.086748] ? lock_acquire+0x1d5/0x580 [ 26.090692] ? lock_acquire+0x1d5/0x580 [ 26.094633] ? pndisc_destructor+0x340/0x340 [ 26.099017] ? lock_release+0xa40/0xa40 [ 26.102964] ip6table_raw_hook+0x65/0x80 [ 26.106996] nf_hook_slow+0xba/0x1a0 [ 26.110683] nf_hook.constprop.27+0x3f6/0x830 [ 26.115149] ? pndisc_destructor+0x340/0x340 [ 26.119526] ? find_held_lock+0x35/0x1d0 [ 26.123562] ? lock_acquire+0x1d5/0x580 [ 26.127507] ? lock_acquire+0x1d5/0x580 [ 26.131450] ? ndisc_send_skb+0x826/0x1370 [ 26.135655] ? lock_downgrade+0x980/0x980 [ 26.139771] ? lock_release+0xa40/0xa40 [ 26.143718] ? ndisc_error_report+0x180/0x180 [ 26.148183] ndisc_send_skb+0xa51/0x1370 [ 26.152217] ? nf_hook.constprop.27+0x830/0x830 [ 26.156854] ? check_noncircular+0x20/0x20 [ 26.161080] ? refcount_add_not_zero+0x133/0x200 [ 26.165803] ? refcount_dec_if_one+0x20/0x20 [ 26.170182] ? print_irqtrace_events+0x270/0x270 [ 26.174912] ndisc_send_ns+0x38a/0x870 [ 26.178769] ? ndisc_netdev_event+0x4a0/0x4a0 [ 26.183238] ? trace_hardirqs_on_caller+0x421/0x5c0 [ 26.188222] ? addrconf_dad_work+0xa5e/0x1320 [ 26.192698] addrconf_dad_work+0xb9e/0x1320 [ 26.196988] ? addrconf_dad_work+0xb9e/0x1320 [ 26.201457] ? addrconf_ifdown+0x14f0/0x14f0 [ 26.205834] ? __lock_is_held+0xb6/0x140 [ 26.209867] process_one_work+0xbbf/0x1af0 [ 26.214071] ? process_one_work+0xbbf/0x1af0 [ 26.218450] ? pwq_dec_nr_in_flight+0x450/0x450 [ 26.223093] ? __schedule+0x90d/0x2070 [ 26.226950] ? __lock_acquire+0x664/0x3e00 [ 26.231158] ? check_noncircular+0x20/0x20 [ 26.235362] ? check_noncircular+0x20/0x20 [ 26.239568] ? lock_acquire+0x1d5/0x580 [ 26.243513] ? lock_acquire+0x1d5/0x580 [ 26.247461] ? worker_thread+0x4a3/0x1990 [ 26.251580] ? lock_downgrade+0x980/0x980 [ 26.255695] ? lock_release+0xa40/0xa40 [ 26.259638] ? check_noncircular+0x20/0x20 [ 26.263844] ? do_raw_spin_trylock+0x190/0x190 [ 26.268399] worker_thread+0x223/0x1990 [ 26.272346] ? finish_task_switch+0x1c0/0x860 [ 26.276814] ? process_one_work+0x1af0/0x1af0 [ 26.281280] ? trace_hardirqs_on_caller+0x421/0x5c0 [ 26.286266] ? trace_hardirqs_on+0xd/0x10 [ 26.290381] ? mmdrop+0x18/0x30 [ 26.293629] ? finish_task_switch+0x279/0x860 [ 26.298095] ? copy_overflow+0x20/0x20 [ 26.301957] ? __schedule+0x90d/0x2070 [ 26.305819] ? check_noncircular+0x20/0x20 [ 26.310022] ? find_held_lock+0x35/0x1d0 [ 26.314053] ? find_held_lock+0x35/0x1d0 [ 26.318084] ? find_held_lock+0x35/0x1d0 [ 26.322117] ? complete+0x62/0x80 [ 26.325544] ? __schedule+0x2070/0x2070 [ 26.329490] ? do_wait_intr_irq+0x3e0/0x3e0 [ 26.333782] ? __lockdep_init_map+0xe4/0x650 [ 26.338160] ? do_raw_spin_trylock+0x190/0x190 [ 26.342712] ? lockdep_init_map+0x9/0x10 [ 26.346743] ? _raw_spin_unlock_irqrestore+0x31/0xba [ 26.351818] ? trace_hardirqs_on_caller+0x421/0x5c0 [ 26.356805] ? trace_hardirqs_on+0xd/0x10 [ 26.360921] ? __kthread_parkme+0x175/0x240 [ 26.365213] kthread+0x33c/0x400 [ 26.368551] ? process_one_work+0x1af0/0x1af0 [ 26.373015] ? kthread_stop+0x7a0/0x7a0 [ 26.376961] ret_from_fork+0x3a/0x50 2018/02/20 07:43:14 executed programs: 581 2018/02/20 07:43:19 executed programs: 1372