IPv6: ADDRCONF(NETDEV_UP): bridge0: link is not ready ===================================== WARNING: bad unlock balance detected! 4.16.0-rc2+ #234 Not tainted ------------------------------------- syzkaller553651/4168 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: 3 locks held by syzkaller553651/4168: #0: ((&idev->mc_ifc_timer)){+.-.}, at: [<00000000447939c8>] lockdep_copy_map include/linux/lockdep.h:178 [inline] #0: ((&idev->mc_ifc_timer)){+.-.}, at: [<00000000447939c8>] call_timer_fn+0x1c6/0x820 kernel/time/timer.c:1316 #1: (rcu_read_lock){....}, at: [<000000003ddce477>] read_pnet include/net/net_namespace.h:280 [inline] #1: (rcu_read_lock){....}, at: [<000000003ddce477>] dev_net include/linux/netdevice.h:2056 [inline] #1: (rcu_read_lock){....}, at: [<000000003ddce477>] mld_sendpack+0x180/0xe70 net/ipv6/mcast.c:1625 #2: (rcu_read_lock){....}, at: [<00000000eebbb957>] nf_hook.constprop.37+0x0/0x830 net/ipv6/mcast.c:2795 stack backtrace: CPU: 0 PID: 4168 Comm: syzkaller553651 Not tainted 4.16.0-rc2+ #234 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] do_IRQ+0xeb/0x190 arch/x86/kernel/irq.c:250 common_interrupt+0x8e/0x8e arch/x86/entry/entry_64.S:576 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:ffff8801b2cf7918 EFLAGS: 00000282 ORIG_RAX: ffffffffffffffd9 RAX: 0000000000000007 RBX: ffff8801d11a3c00 RCX: 0000000000000000 RDX: 0000000000000000 RSI: 0000000000000001 RDI: 0000000000000282 RBP: ffff8801b2cf7938 R08: 000000000000000d R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000000 R12: ffff8801b06ff8a0 R13: 0000000000000282 R14: ffffffff8224d0d9 R15: ffff8801b2cf7ae8 ebitmap_destroy+0x79/0xe0 security/selinux/ss/ebitmap.c:338 mls_context_destroy security/selinux/ss/context.h:109 [inline] context_destroy security/selinux/ss/context.h:148 [inline] security_compute_sid+0xa46/0x18f0 security/selinux/ss/services.c:1743 security_transition_sid+0x75/0x90 security/selinux/ss/services.c:1764 socket_sockcreate_sid security/selinux/hooks.c:4335 [inline] selinux_socket_create+0x3cf/0x740 security/selinux/hooks.c:4368 security_socket_create+0x83/0xc0 security/security.c:1338 __sock_create+0xf7/0x850 net/socket.c:1240 sock_create net/socket.c:1325 [inline] SYSC_socket net/socket.c:1355 [inline] SyS_socket+0xeb/0x1d0 net/socket.c:1335 do_syscall_64+0x280/0x940 arch/x86/entry/common.c:287 entry_SYSCALL_64_after_hwframe+0x42/0xb7 RIP: 0033:0x445f39 RSP: 002b:00007fffc2f32058 EFLAGS: 00000207 ORIG_RAX: 0000000000000029 RAX: ffffffffffffffda RBX: ffffffffffffffff RCX: 0000000000445f39 RDX: 000000000000003c RSI: 0000000000000003 RDI: 000000000000000a RBP: 00007fffc2f320f8 R08: 00000000004a786b R09: 00000000004a786b R10: 00000000004a786b R11: 0000000000000207 R12: 00007fffc2f320f8 R13: 00000000004034c0 R14: 0000000000000000 R15: 0000000000000000