[?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. [ 18.389822] audit: type=1400 audit(1519134001.011:6): avc: denied { map } for pid=4148 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 Debian GNU/Linux 7 syzkaller ttyS0 Warning: Permanently added '10.128.15.202' (ECDSA) to the list of known hosts. net.ipv6.conf.syz0.accept_dad = 0 net.ipv6.conf.syz0.router_solicitations = 0 syzkaller login: [ 24.851862] audit: type=1400 audit(1519134007.473:7): avc: denied { map } for pid=4162 comm="syzkaller828926" path="/root/syzkaller828926483" dev="sda1" ino=16481 scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=unconfined_u:object_r:user_home_t:s0 tclass=file permissive=1 [ 24.861704] IPVS: ftp: loaded support on port[0] = 21 RTNETLINK answers: Operation not supported RTNETLINK answers: No buffer space available RTNETLINK answers: Operation not supported [ 25.090682] IPv6: ADDRCONF(NETDEV_UP): bridge0: link is not ready RTNETLINK answers: Operation not supported RTNETLINK answers: Operation not supported RTNETLINK answers: Operation not supported RTNETLINK answers: Invalid argument RTNETLINK answers: Invalid argument RTNETLINK answers: Invalid argument executing program [ 25.432496] [ 25.434147] ===================================== [ 25.438955] WARNING: bad unlock balance detected! [ 25.443771] 4.16.0-rc2+ #322 Not tainted [ 25.447795] ------------------------------------- [ 25.452603] kworker/1:1/23 is trying to release lock (rcu_read_lock_bh) at: [ 25.459687] [] hashlimit_mt_common.isra.10+0x1beb/0x2610 [ 25.466671] but there are no more locks to release! [ 25.471651] [ 25.471651] other info that might help us debug this: [ 25.478282] 5 locks held by kworker/1:1/23: [ 25.482569] #0: ((wq_completion)"%s"("ipv6_addrconf")){+.+.}, at: [<00000000bd9b2c92>] process_one_work+0xaaf/0x1af0 [ 25.493378] #1: ((work_completion)(&(&ifa->dad_work)->work)){+.+.}, at: [<0000000070582a7b>] process_one_work+0xb01/0x1af0 [ 25.504707] #2: (rtnl_mutex){+.+.}, at: [<000000005f73ab90>] rtnl_lock+0x17/0x20 [ 25.512387] #3: (rcu_read_lock){....}, at: [<000000003d6bc548>] ndisc_send_skb+0x826/0x1370 [ 25.521026] #4: (rcu_read_lock){....}, at: [<00000000e8019e05>] nf_hook.constprop.27+0x0/0x830 [ 25.529925] [ 25.529925] stack backtrace: [ 25.534393] CPU: 1 PID: 23 Comm: kworker/1:1 Not tainted 4.16.0-rc2+ #322 [ 25.541284] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 25.550612] Workqueue: ipv6_addrconf addrconf_dad_work [ 25.555884] Call Trace: [ 25.558444] dump_stack+0x194/0x257 [ 25.562040] ? arch_local_irq_restore+0x53/0x53 [ 25.566686] ? hashlimit_mt_common.isra.10+0x1beb/0x2610 [ 25.572113] print_unlock_imbalance_bug+0x12f/0x140 [ 25.577101] lock_release+0x6fe/0xa40 [ 25.580874] ? hashlimit_mt_common.isra.10+0x1beb/0x2610 [ 25.586293] ? lock_downgrade+0x980/0x980 [ 25.590410] ? lock_release+0xa40/0xa40 [ 25.594352] ? __raw_spin_lock_init+0x1c/0x100 [ 25.598905] ? do_raw_spin_trylock+0x190/0x190 [ 25.603463] hashlimit_mt_common.isra.10+0x1c08/0x2610 [ 25.608718] ? dsthash_find+0x5b0/0x5b0 [ 25.612662] ? __lock_acquire+0x664/0x3e00 [ 25.616866] ? ret_from_fork+0x3a/0x50 [ 25.620728] ? print_irqtrace_events+0x270/0x270 [ 25.625455] ? __unwind_start+0x169/0x330 [ 25.629575] hashlimit_mt+0x78/0x90 [ 25.633178] ? hashlimit_mt+0x78/0x90 [ 25.636949] ip6t_do_table+0x98d/0x1a30 [ 25.640899] ? debug_check_no_locks_freed+0x3c0/0x3c0 [ 25.646060] ? ip6t_error+0x60/0x60 [ 25.649662] ? check_noncircular+0x20/0x20 [ 25.653864] ? lock_acquire+0x1d5/0x580 [ 25.657807] ? lock_acquire+0x1d5/0x580 [ 25.661749] ? pndisc_destructor+0x340/0x340 [ 25.666127] ? lock_release+0xa40/0xa40 [ 25.670069] ip6table_raw_hook+0x65/0x80 [ 25.674099] nf_hook_slow+0xba/0x1a0 [ 25.677784] nf_hook.constprop.27+0x3f6/0x830 [ 25.682256] ? pndisc_destructor+0x340/0x340 [ 25.686634] ? find_held_lock+0x35/0x1d0 [ 25.690667] ? lock_acquire+0x1d5/0x580 [ 25.694615] ? lock_acquire+0x1d5/0x580 [ 25.698556] ? ndisc_send_skb+0x826/0x1370 [ 25.702761] ? lock_downgrade+0x980/0x980 [ 25.706879] ? lock_release+0xa40/0xa40 [ 25.710822] ? ndisc_error_report+0x180/0x180 [ 25.715285] ndisc_send_skb+0xa51/0x1370 [ 25.719320] ? nf_hook.constprop.27+0x830/0x830 [ 25.723959] ? check_noncircular+0x20/0x20 [ 25.728161] ? refcount_add_not_zero+0x133/0x200 [ 25.732886] ? refcount_dec_if_one+0x20/0x20 [ 25.737263] ? print_irqtrace_events+0x270/0x270 [ 25.741990] ndisc_send_ns+0x38a/0x870 [ 25.745850] ? ndisc_netdev_event+0x4a0/0x4a0 [ 25.750316] ? trace_hardirqs_on_caller+0x421/0x5c0 [ 25.755299] ? addrconf_dad_work+0xa5e/0x1320 [ 25.759767] addrconf_dad_work+0xb9e/0x1320 [ 25.764056] ? addrconf_dad_work+0xb9e/0x1320 [ 25.768521] ? addrconf_ifdown+0x14f0/0x14f0 [ 25.772900] ? __lock_is_held+0xb6/0x140 [ 25.776931] process_one_work+0xbbf/0x1af0 [ 25.781137] ? process_one_work+0xbbf/0x1af0 [ 25.785520] ? pwq_dec_nr_in_flight+0x450/0x450 [ 25.790167] ? __schedule+0x90d/0x2070 [ 25.794033] ? __lock_acquire+0x664/0x3e00 [ 25.798237] ? check_noncircular+0x20/0x20 [ 25.802442] ? check_noncircular+0x20/0x20 [ 25.806647] ? lock_acquire+0x1d5/0x580 [ 25.810592] ? lock_acquire+0x1d5/0x580 [ 25.814538] ? worker_thread+0x4a3/0x1990 [ 25.818655] ? lock_downgrade+0x980/0x980 [ 25.822773] ? lock_release+0xa40/0xa40 [ 25.826716] ? check_noncircular+0x20/0x20 [ 25.830917] ? do_raw_spin_trylock+0x190/0x190 [ 25.835468] worker_thread+0x223/0x1990 [ 25.839413] ? finish_task_switch+0x1c0/0x860 [ 25.843882] ? process_one_work+0x1af0/0x1af0 [ 25.848346] ? trace_hardirqs_on_caller+0x421/0x5c0 [ 25.853332] ? trace_hardirqs_on+0xd/0x10 [ 25.857450] ? mmdrop+0x18/0x30 [ 25.860710] ? finish_task_switch+0x279/0x860 [ 25.865174] ? copy_overflow+0x20/0x20 [ 25.869037] ? __schedule+0x90d/0x2070 [ 25.872898] ? check_noncircular+0x20/0x20 [ 25.877101] ? find_held_lock+0x35/0x1d0 [ 25.881130] ? find_held_lock+0x35/0x1d0 [ 25.885161] ? find_held_lock+0x35/0x1d0 [ 25.889191] ? complete+0x62/0x80 [ 25.892615] ? __schedule+0x2070/0x2070 [ 25.896557] ? do_wait_intr_irq+0x3e0/0x3e0 [ 25.900849] ? __lockdep_init_map+0xe4/0x650 [ 25.905224] ? do_raw_spin_trylock+0x190/0x190 [ 25.909774] ? lockdep_init_map+0x9/0x10 [ 25.913804] ? _raw_spin_unlock_irqrestore+0x31/0xba [ 25.918877] ? trace_hardirqs_on_caller+0x421/0x5c0 [ 25.923868] ? trace_hardirqs_on+0xd/0x10 [ 25.927986] ? __kthread_parkme+0x175/0x240 [ 25.932278] kthread+0x33