[....] Starting enhanced syslogd: rsyslogd[ 15.844612] audit: type=1400 audit(1519085557.220:5): avc: denied { syslog } for pid=3980 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: [ 18.714644] audit: type=1400 audit(1519085560.090:6): avc: denied { map } for pid=4118 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 '10.128.15.200' (ECDSA) to the list of known hosts. [ 26.311744] audit: type=1400 audit(1519085567.687:7): avc: denied { map } for pid=4133 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 00:12:47 parsed 1 programs 2018/02/20 00:12:47 executed programs: 0 [ 26.574090] audit: type=1400 audit(1519085567.949:8): avc: denied { map } for pid=4133 comm="syz-execprog" path="/root/syzkaller-shm539524913" 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 [ 26.592471] IPVS: ftp: loaded support on port[0] = 21 [ 26.801683] IPv6: ADDRCONF(NETDEV_UP): bridge0: link is not ready [ 27.447423] [ 27.449116] ===================================== [ 27.454010] WARNING: bad unlock balance detected! [ 27.458832] 4.16.0-rc2+ #320 Not tainted [ 27.462857] ------------------------------------- [ 27.467664] kworker/1:1/23 is trying to release lock (rcu_read_lock_bh) at: [ 27.474740] [] hashlimit_mt_common.isra.10+0x1beb/0x2610 [ 27.481725] but there are no more locks to release! [ 27.486707] [ 27.486707] other info that might help us debug this: [ 27.493338] 5 locks held by kworker/1:1/23: [ 27.497624] #0: ((wq_completion)"%s"("ipv6_addrconf")){+.+.}, at: [<00000000edebb918>] process_one_work+0xaaf/0x1af0 [ 27.508434] #1: ((work_completion)(&(&ifa->dad_work)->work)){+.+.}, at: [<0000000098b5ea76>] process_one_work+0xb01/0x1af0 [ 27.519759] #2: (rtnl_mutex){+.+.}, at: [<00000000789523bc>] rtnl_lock+0x17/0x20 [ 27.527439] #3: (rcu_read_lock){....}, at: [<0000000028620d70>] ndisc_send_skb+0x826/0x1370 [ 27.536074] #4: (rcu_read_lock){....}, at: [<00000000d5bc87f3>] nf_hook.constprop.27+0x0/0x830 [ 27.544971] [ 27.544971] stack backtrace: [ 27.549436] CPU: 1 PID: 23 Comm: kworker/1:1 Not tainted 4.16.0-rc2+ #320 [ 27.556329] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 27.565664] Workqueue: ipv6_addrconf addrconf_dad_work [ 27.570908] Call Trace: [ 27.573465] dump_stack+0x194/0x257 [ 27.577061] ? arch_local_irq_restore+0x53/0x53 [ 27.581704] ? hashlimit_mt_common.isra.10+0x1beb/0x2610 [ 27.587124] print_unlock_imbalance_bug+0x12f/0x140 [ 27.592108] lock_release+0x6fe/0xa40 [ 27.595878] ? hashlimit_mt_common.isra.10+0x1beb/0x2610 [ 27.601297] ? lock_downgrade+0x980/0x980 [ 27.605412] ? lock_release+0xa40/0xa40 [ 27.609353] ? __raw_spin_lock_init+0x1c/0x100 [ 27.613902] ? do_raw_spin_trylock+0x190/0x190 [ 27.618457] hashlimit_mt_common.isra.10+0x1c08/0x2610 [ 27.623714] ? dsthash_find+0x5b0/0x5b0 [ 27.627657] ? __lock_acquire+0x664/0x3e00 [ 27.631866] ? ret_from_fork+0x3a/0x50 [ 27.635726] ? print_irqtrace_events+0x270/0x270 [ 27.640453] ? __unwind_start+0x169/0x330 [ 27.644568] hashlimit_mt+0x78/0x90 [ 27.648162] ? hashlimit_mt+0x78/0x90 [ 27.651930] ip6t_do_table+0x98d/0x1a30 [ 27.655875] ? debug_check_no_locks_freed+0x3c0/0x3c0 [ 27.661035] ? ip6t_error+0x60/0x60 [ 27.664633] ? check_noncircular+0x20/0x20 [ 27.668840] ? lock_acquire+0x1d5/0x580 [ 27.672779] ? lock_acquire+0x1d5/0x580 [ 27.676721] ? pndisc_destructor+0x340/0x340 [ 27.681097] ? lock_release+0xa40/0xa40 [ 27.685038] ip6table_raw_hook+0x65/0x80 [ 27.689066] nf_hook_slow+0xba/0x1a0 [ 27.692748] nf_hook.constprop.27+0x3f6/0x830 [ 27.697213] ? pndisc_destructor+0x340/0x340 [ 27.701592] ? find_held_lock+0x35/0x1d0 [ 27.706336] ? lock_acquire+0x1d5/0x580 [ 27.710281] ? lock_acquire+0x1d5/0x580 [ 27.714227] ? ndisc_send_skb+0x826/0x1370 [ 27.718436] ? lock_downgrade+0x980/0x980 [ 27.722551] ? lock_release+0xa40/0xa40 [ 27.726492] ? ndisc_error_report+0x180/0x180 [ 27.730958] ndisc_send_skb+0xa51/0x1370 [ 27.734987] ? nf_hook.constprop.27+0x830/0x830 [ 27.739622] ? check_noncircular+0x20/0x20 [ 27.743827] ? refcount_add_not_zero+0x133/0x200 [ 27.748549] ? refcount_dec_if_one+0x20/0x20 [ 27.752938] ? print_irqtrace_events+0x270/0x270 [ 27.757665] ndisc_send_ns+0x38a/0x870 [ 27.761520] ? ndisc_netdev_event+0x4a0/0x4a0 [ 27.765984] ? trace_hardirqs_on_caller+0x421/0x5c0 [ 27.770971] ? addrconf_dad_work+0xa5e/0x1320 [ 27.775432] addrconf_dad_work+0xb9e/0x1320 [ 27.779819] ? addrconf_dad_work+0xb9e/0x1320 [ 27.784284] ? addrconf_ifdown+0x14f0/0x14f0 [ 27.788658] ? __lock_is_held+0xb6/0x140 [ 27.792693] process_one_work+0xbbf/0x1af0 [ 27.796895] ? process_one_work+0xbbf/0x1af0 [ 27.801274] ? pwq_dec_nr_in_flight+0x450/0x450 [ 27.805913] ? __schedule+0x90d/0x2070 [ 27.809768] ? __lock_acquire+0x664/0x3e00 [ 27.813971] ? check_noncircular+0x20/0x20 [ 27.818176] ? check_noncircular+0x20/0x20 [ 27.822378] ? lock_acquire+0x1d5/0x580 [ 27.826331] ? lock_acquire+0x1d5/0x580 [ 27.830273] ? worker_thread+0x4a3/0x1990 [ 27.834388] ? lock_downgrade+0x980/0x980 [ 27.838513] ? lock_release+0xa40/0xa40 [ 27.842458] ? do_raw_spin_trylock+0x190/0x190 [ 27.847021] worker_thread+0x223/0x1990 [ 27.850964] ? finish_task_switch+0x1c0/0x860 [ 27.855427] ? process_one_work+0x1af0/0x1af0 [ 27.859892] ? trace_hardirqs_on_caller+0x421/0x5c0 [ 27.864965] ? trace_hardirqs_on+0xd/0x10 [ 27.869079] ? mmdrop+0x18/0x30 [ 27.872335] ? finish_task_switch+0x279/0x860 [ 27.876798] ? copy_overflow+0x20/0x20 [ 27.880655] ? __schedule+0x90d/0x2070 [ 27.884512] ? check_noncircular+0x20/0x20 [ 27.888725] ? find_held_lock+0x35/0x1d0 [ 27.892761] ? find_held_lock+0x35/0x1d0 [ 27.896792] ? find_held_lock+0x35/0x1d0 [ 27.900823] ? complete+0x62/0x80 [ 27.904252] ? __schedule+0x2070/0x2070 [ 27.908195] ? do_wait_intr_irq+0x3e0/0x3e0 [ 27.912483] ? __lockdep_init_map+0xe4/0x650 [ 27.916861] ? do_raw_spin_trylock+0x190/0x190 [ 27.921411] ? lockdep_init_map+0x9/0x10 [ 27.925440] ? _raw_spin_unlock_irqrestore+0x31/0xba [ 27.930510] ? trace_hardirqs_on_caller+0x421/0x5c0 [ 27.935495] ? trace_hardirqs_on+0xd/0x10 [ 27.939617] ? __kthread_parkme+0x175/0x240 [ 27.943906] kthread+0x33c/0x400 [ 27.947244] ? process_one_work+0x1af0/0x1af0 [ 27.951716] ? kthread_stop+0x7a0/0x7a0 [ 27.955659] ret_from_fork+0x3a/0x50 2018/02/20 00:12:52 executed programs: 615 2018/02/20 00:12:57 executed programs: 1440