[?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. [ 17.857059] audit: type=1400 audit(1519094654.990:6): avc: denied { map } for pid=4119 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 '10.128.15.205' (ECDSA) to the list of known hosts. syzkaller login: [ 24.169062] audit: type=1400 audit(1519094661.302:7): 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 02:44:21 parsed 1 programs 2018/02/20 02:44:21 executed programs: 0 [ 24.432261] audit: type=1400 audit(1519094661.566:8): avc: denied { map } for pid=4133 comm="syz-execprog" path="/root/syzkaller-shm365376902" 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 [ 24.447486] IPVS: ftp: loaded support on port[0] = 21 [ 24.666543] IPv6: ADDRCONF(NETDEV_UP): bridge0: link is not ready [ 25.120514] [ 25.122169] ===================================== [ 25.126977] WARNING: bad unlock balance detected! [ 25.131787] 4.16.0-rc1+ #232 Not tainted [ 25.135813] ------------------------------------- [ 25.140622] kworker/0:1/24 is trying to release lock (rcu_read_lock_bh) at: [ 25.147700] [] hashlimit_mt_common.isra.10+0x1beb/0x2610 [ 25.154677] but there are no more locks to release! [ 25.159658] [ 25.159658] other info that might help us debug this: [ 25.166388] 5 locks held by kworker/0:1/24: [ 25.170676] #0: ((wq_completion)"%s"("ipv6_addrconf")){+.+.}, at: [<0000000007b9875d>] process_one_work+0xaaf/0x1af0 [ 25.181490] #1: ((work_completion)(&(&ifa->dad_work)->work)){+.+.}, at: [<00000000a51b1134>] process_one_work+0xb01/0x1af0 [ 25.192819] #2: (rtnl_mutex){+.+.}, at: [<00000000c72299b4>] rtnl_lock+0x17/0x20 [ 25.200502] #3: (rcu_read_lock){....}, at: [<00000000551288f3>] ndisc_send_skb+0x826/0x1370 [ 25.209141] #4: (rcu_read_lock){....}, at: [<00000000e45ba1e8>] nf_hook.constprop.27+0x0/0x830 [ 25.218039] [ 25.218039] stack backtrace: [ 25.222504] CPU: 0 PID: 24 Comm: kworker/0:1 Not tainted 4.16.0-rc1+ #232 [ 25.229398] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 25.238726] Workqueue: ipv6_addrconf addrconf_dad_work [ 25.243969] Call Trace: [ 25.246529] dump_stack+0x194/0x257 [ 25.250127] ? arch_local_irq_restore+0x53/0x53 [ 25.254772] ? hashlimit_mt_common.isra.10+0x1beb/0x2610 [ 25.260195] print_unlock_imbalance_bug+0x12f/0x140 [ 25.265180] lock_release+0x6fe/0xa40 [ 25.268950] ? hashlimit_mt_common.isra.10+0x1beb/0x2610 [ 25.274369] ? lock_downgrade+0x980/0x980 [ 25.278486] ? lock_release+0xa40/0xa40 [ 25.282429] ? __raw_spin_lock_init+0x1c/0x100 [ 25.286989] ? do_raw_spin_trylock+0x190/0x190 [ 25.291545] hashlimit_mt_common.isra.10+0x1c08/0x2610 [ 25.296793] ? dsthash_find+0x5b0/0x5b0 [ 25.300738] ? __lock_acquire+0x664/0x3e00 [ 25.304943] ? ret_from_fork+0x3a/0x50 [ 25.308806] ? print_irqtrace_events+0x270/0x270 [ 25.313535] ? __unwind_start+0x169/0x330 [ 25.317654] hashlimit_mt+0x78/0x90 [ 25.321250] ? hashlimit_mt+0x78/0x90 [ 25.325021] ip6t_do_table+0x98d/0x1a30 [ 25.328982] ? debug_check_no_locks_freed+0x3c0/0x3c0 [ 25.334163] ? ip6t_error+0x60/0x60 [ 25.337760] ? check_noncircular+0x20/0x20 [ 25.341965] ? lock_acquire+0x1d5/0x580 [ 25.345907] ? lock_acquire+0x1d5/0x580 [ 25.349851] ? pndisc_destructor+0x340/0x340 [ 25.354230] ? lock_release+0xa40/0xa40 [ 25.358173] ip6table_raw_hook+0x65/0x80 [ 25.362205] nf_hook_slow+0xba/0x1a0 [ 25.365892] nf_hook.constprop.27+0x3f6/0x830 [ 25.370357] ? pndisc_destructor+0x340/0x340 [ 25.374735] ? find_held_lock+0x35/0x1d0 [ 25.378767] ? lock_acquire+0x1d5/0x580 [ 25.382711] ? lock_acquire+0x1d5/0x580 [ 25.386654] ? ndisc_send_skb+0x826/0x1370 [ 25.390858] ? lock_downgrade+0x980/0x980 [ 25.394977] ? lock_release+0xa40/0xa40 [ 25.398925] ? ndisc_error_report+0x180/0x180 [ 25.403391] ndisc_send_skb+0xa51/0x1370 [ 25.407426] ? nf_hook.constprop.27+0x830/0x830 [ 25.412063] ? check_noncircular+0x20/0x20 [ 25.416278] ? refcount_add_not_zero+0x133/0x200 [ 25.421004] ? refcount_dec_if_one+0x20/0x20 [ 25.425385] ? print_irqtrace_events+0x270/0x270 [ 25.430114] ndisc_send_ns+0x38a/0x870 [ 25.433971] ? ndisc_netdev_event+0x4a0/0x4a0 [ 25.438436] ? trace_hardirqs_on_caller+0x421/0x5c0 [ 25.443425] ? addrconf_dad_work+0xa5e/0x1320 [ 25.447892] addrconf_dad_work+0xb9e/0x1320 [ 25.452187] ? addrconf_dad_work+0xb9e/0x1320 [ 25.456653] ? addrconf_ifdown+0x14f0/0x14f0 [ 25.461031] ? __lock_is_held+0xb6/0x140 [ 25.465064] process_one_work+0xbbf/0x1af0 [ 25.469269] ? process_one_work+0xbbf/0x1af0 [ 25.473652] ? pwq_dec_nr_in_flight+0x450/0x450 [ 25.478293] ? __schedule+0x8ea/0x2040 [ 25.482153] ? __lock_acquire+0x664/0x3e00 [ 25.486360] ? check_noncircular+0x20/0x20 [ 25.490568] ? check_noncircular+0x20/0x20 [ 25.494776] ? lock_acquire+0x1d5/0x580 [ 25.498719] ? lock_acquire+0x1d5/0x580 [ 25.502663] ? worker_thread+0x4a3/0x1990 [ 25.506782] ? lock_downgrade+0x980/0x980 [ 25.510904] ? lock_release+0xa40/0xa40 [ 25.514849] ? retint_kernel+0x10/0x10 [ 25.518706] ? do_raw_spin_trylock+0x190/0x190 [ 25.523270] worker_thread+0x223/0x1990 [ 25.527214] ? finish_task_switch+0x1e2/0x890 [ 25.531714] ? process_one_work+0x1af0/0x1af0 [ 25.536181] ? trace_hardirqs_on_caller+0x421/0x5c0 [ 25.541165] ? trace_hardirqs_on+0xd/0x10 [ 25.545286] ? mmdrop+0x18/0x30 [ 25.548534] ? finish_task_switch+0x29b/0x890 [ 25.553000] ? copy_overflow+0x20/0x20 [ 25.556864] ? __schedule+0x8ea/0x2040 [ 25.560722] ? check_noncircular+0x20/0x20 [ 25.564926] ? find_held_lock+0x35/0x1d0 [ 25.568957] ? find_held_lock+0x35/0x1d0 [ 25.572995] ? find_held_lock+0x35/0x1d0 [ 25.577029] ? complete+0x62/0x80 [ 25.580453] ? __schedule+0x2040/0x2040 [ 25.584396] ? do_wait_intr_irq+0x3e0/0x3e0 [ 25.588687] ? __lockdep_init_map+0xe4/0x650 [ 25.593065] ? do_raw_spin_trylock+0x190/0x190 [ 25.597614] ? lockdep_init_map+0x9/0x10 [ 25.601646] ? _raw_spin_unlock_irqrestore+0x31/0xba [ 25.606718] ? trace_hardirqs_on_caller+0x421/0x5c0 [ 25.611704] ? trace_hardirqs_on+0xd/0x10 [ 25.615822] ? __kthread_parkme+0x175/0x240 [ 25.620114] kthread+0x33c/0x400 [ 25.623451] ? process_one_work+0x1af0/0x1af0 [ 25.627915] ? kthread_stop+0x7a0/0x7a0 [ 25.631858] ret_from_fork+0x3a/0x50 2018/02/20 02:44:26 executed programs: 623 2018/02/20 02:44:31 executed programs: 1439