IPv6: ADDRCONF(NETDEV_UP): bridge0: link is not ready ===================================== WARNING: bad unlock balance detected! 4.16.0-rc2+ #235 Not tainted ------------------------------------- udevd/4154 is trying to release lock (rcu_read_lock_bh) at: [] rcu_read_unlock_bh include/linux/rcupdate.h:722 [inline] [] hashlimit_mt_common.isra.10+0x1beb/0x2610 net/netfilter/xt_hashlimit.c:777 but there are no more locks to release! other info that might help us debug this: 4 locks held by udevd/4154: #0: (&mm->mmap_sem){++++}, at: [<00000000336f5331>] vm_munmap+0xed/0x180 mm/mmap.c:2742 #1: ((&idev->mc_ifc_timer)){+.-.}, at: [<000000004c909a11>] lockdep_copy_map include/linux/lockdep.h:178 [inline] #1: ((&idev->mc_ifc_timer)){+.-.}, at: [<000000004c909a11>] call_timer_fn+0x1c6/0x820 kernel/time/timer.c:1316 #2: (rcu_read_lock){....}, at: [<00000000a9177159>] read_pnet include/net/net_namespace.h:284 [inline] #2: (rcu_read_lock){....}, at: [<00000000a9177159>] dev_net include/linux/netdevice.h:2056 [inline] #2: (rcu_read_lock){....}, at: [<00000000a9177159>] mld_sendpack+0x180/0xe70 net/ipv6/mcast.c:1625 #3: (rcu_read_lock){....}, at: [<000000008a1e5b0b>] nf_hook.constprop.37+0x0/0x830 net/ipv6/mcast.c:2795 stack backtrace: CPU: 0 PID: 4154 Comm: udevd Not tainted 4.16.0-rc2+ #235 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Call Trace: __dump_stack lib/dump_stack.c:17 [inline] dump_stack+0x194/0x257 lib/dump_stack.c:53 print_unlock_imbalance_bug+0x12f/0x140 kernel/locking/lockdep.c:3484 __lock_release kernel/locking/lockdep.c:3691 [inline] lock_release+0x6fe/0xa40 kernel/locking/lockdep.c:3939 rcu_lock_release include/linux/rcupdate.h:249 [inline] rcu_read_unlock_bh include/linux/rcupdate.h:724 [inline] hashlimit_mt_common.isra.10+0x1c08/0x2610 net/netfilter/xt_hashlimit.c:777 hashlimit_mt+0x78/0x90 net/netfilter/xt_hashlimit.c:846 ip6t_do_table+0x98d/0x1a30 net/ipv6/netfilter/ip6_tables.c:319 ip6table_raw_hook+0x65/0x80 net/ipv6/netfilter/ip6table_raw.c:42 nf_hook_entry_hookfn include/linux/netfilter.h:120 [inline] nf_hook_slow+0xba/0x1a0 net/netfilter/core.c:483 nf_hook.constprop.37+0x3f6/0x830 include/linux/netfilter.h:243 NF_HOOK include/linux/netfilter.h:286 [inline] mld_sendpack+0x6c2/0xe70 net/ipv6/mcast.c:1658 mld_send_cr net/ipv6/mcast.c:1954 [inline] mld_ifc_timer_expire+0x3d9/0x770 net/ipv6/mcast.c:2451 call_timer_fn+0x228/0x820 kernel/time/timer.c:1326 expire_timers kernel/time/timer.c:1363 [inline] __run_timers+0x7ee/0xb70 kernel/time/timer.c:1666 run_timer_softirq+0x4c/0x70 kernel/time/timer.c:1692 __do_softirq+0x2d7/0xb85 kernel/softirq.c:285 invoke_softirq kernel/softirq.c:365 [inline] irq_exit+0x1cc/0x200 kernel/softirq.c:405 exiting_irq arch/x86/include/asm/apic.h:541 [inline] smp_apic_timer_interrupt+0x16b/0x700 arch/x86/kernel/apic/apic.c:1052 apic_timer_interrupt+0x8e/0xa0 arch/x86/entry/entry_64.S:796 RIP: 0010:arch_local_irq_restore arch/x86/include/asm/paravirt.h:777 [inline] RIP: 0010:kmem_cache_free+0xf2/0x2a0 mm/slab.c:3744 RSP: 0018:ffff8801a89cfc88 EFLAGS: 00000282 ORIG_RAX: ffffffffffffff12 RAX: 0000000000000007 RBX: ffff8801da9c1840 RCX: 0000000000000006 RDX: 0000000000000000 RSI: 1ffff10036644d23 RDI: 0000000000000282 RBP: ffff8801a89cfca8 R08: 1ffff10035139f5f R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000000 R12: ffff8801d08b9d68 R13: 0000000000000282 R14: ffffffff819e8062 R15: dffffc0000000000 remove_vma+0x162/0x1b0 mm/mmap.c:176 remove_vma_list mm/mmap.c:2490 [inline] do_munmap+0x82a/0xdf0 mm/mmap.c:2731 vm_munmap+0x10b/0x180 mm/mmap.c:2745 SYSC_munmap mm/mmap.c:2755 [inline] SyS_munmap+0x25/0x30 mm/mmap.c:2752 do_syscall_64+0x280/0x940 arch/x86/entry/common.c:287 entry_SYSCALL_64_after_hwframe+0x42/0xb7 RIP: 0033:0x7f8d7b29cd37 RSP: 002b:00007ffc9f57beb8 EFLAGS: 00000206 ORIG_RAX: 000000000000000b RAX: ffffffffffffffda RBX: 0000000000af3ef0 RCX: 00007f8d7b29cd37 RDX: 0000000000000000 RSI: 0000000000001000 RDI: 00007f8d7bb93000 RBP: 000000000000000