SELinux: unrecognized netlink message: protocol=0 nlmsg_type=27430 sclass=netlink_route_socket ===================================== [ BUG: bad unlock balance detected! ] 4.4.113-g202e079 #1 Not tainted ------------------------------------- syz-executor2/8884 is trying to release lock (mrt_lock) at: [] ipmr_mfc_seq_stop+0xe4/0x140 net/ipv6/ip6mr.c:553 but there are no more locks to release! other info that might help us debug this: 1 lock held by syz-executor2/8884: #0: (&p->lock){+.+.+.}, at: [] seq_read+0xdd/0x1270 fs/seq_file.c:178 stack backtrace: CPU: 0 PID: 8884 Comm: syz-executor2 Not tainted 4.4.113-g202e079 #1 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 0000000000000000 7bc83a604b6ce990 ffff8800b3a8f930 ffffffff81d0278d ffffffff84771c18 ffff8801d4584740 ffffffff833c5524 ffffffff84771c18 ffff8801d4584f88 ffff8800b3a8f960 ffffffff81232314 dffffc0000000000 Call Trace: [] __dump_stack lib/dump_stack.c:15 [inline] [] dump_stack+0xc1/0x124 lib/dump_stack.c:51 [] print_unlock_imbalance_bug+0x174/0x1a0 kernel/locking/lockdep.c:3266 [] __lock_release kernel/locking/lockdep.c:3408 [inline] [] lock_release+0x72a/0xc10 kernel/locking/lockdep.c:3611 [] __raw_read_unlock include/linux/rwlock_api_smp.h:225 [inline] [] _raw_read_unlock+0x1a/0x50 kernel/locking/spinlock.c:255 [] ipmr_mfc_seq_stop+0xe4/0x140 net/ipv6/ip6mr.c:553 [] seq_read+0xa80/0x1270 fs/seq_file.c:283 [] proc_reg_read+0xef/0x170 fs/proc/inode.c:202 [] do_loop_readv_writev+0x141/0x1e0 fs/read_write.c:680 [] do_readv_writev+0x5dd/0x6e0 fs/read_write.c:810 [] vfs_readv+0x78/0xb0 fs/read_write.c:834 [] SYSC_preadv fs/read_write.c:912 [inline] [] SyS_preadv+0x199/0x230 fs/read_write.c:898 [] entry_SYSCALL_64_fastpath+0x1c/0x98 pktgen: kernel_thread() failed for cpu 1 pktgen: Cannot create thread for cpu 1 (-4) IPVS: Creating netns size=2552 id=9 pktgen: kernel_thread() failed for cpu 0 pktgen: Cannot create thread for cpu 0 (-4) pktgen: kernel_thread() failed for cpu 1 pktgen: Cannot create thread for cpu 1 (-4) pktgen: Initialization failed for all threads kasan: CONFIG_KASAN_INLINE enabled kasan: GPF could be caused by NULL-ptr deref or user memory accessgeneral protection fault: 0000 [#1] PREEMPT SMP KASAN Dumping ftrace buffer: (ftrace buffer empty) Modules linked in: CPU: 0 PID: 8903 Comm: syz-executor7 Not tainted 4.4.113-g202e079 #1 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 task: ffff8801d447df00 task.stack: ffff8800b1388000 RIP: 0010:[] [] __read_once_size include/linux/compiler.h:218 [inline] RIP: 0010:[] [] nfqnl_nf_hook_drop+0x190/0x3a0 net/netfilter/nfnetlink_queue.c:879 RSP: 0018:ffff8800b138fba8 EFLAGS: 00010202 RAX: 0000000000000007 RBX: 0000000000000003 RCX: ffffffff82f9b6d9 RDX: 0000000000010000 RSI: ffffc90000e5b000 RDI: ffffffff84418100 RBP: ffff8800b138fbd8 R08: 0000000000000000 R09: 0000000000000000 R10: ffffffff83844340 R11: 1ffff10016271f40 R12: dffffc0000000000 R13: ffff8801d4702368 R14: 0000000000000038 R15: 00000000000000b8 FS: 00007fdbee3b4700(0000) GS:ffff8801db200000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00000000006faad4 CR3: 00000000ba0da000 CR4: 0000000000160670 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Stack: ffffffff82f9b650 ffffffff83cc6560 ffff8800b06eda00 ffff8801d4702368 ffff8801d4702368 ffff8801d4702360 ffff8800b138fc08 ffffffff82f9359e ffffffff82f934e0 ffffffff843e3760 ffff8800b06ee4b8 dffffc0000000000 Call Trace: [] nf_queue_nf_hook_drop+0xbe/0x1d0 net/netfilter/nf_queue.c:108 [] nf_unregister_net_hook+0x2ab/0x350 net/netfilter/core.c:154 [] nf_unregister_hook_list net/netfilter/core.c:434 [inline] [] netfilter_net_exit+0x40/0xb0 net/netfilter/core.c:466 [] ops_exit_list.isra.4+0xae/0x150 net/core/net_namespace.c:134 [] setup_net+0x221/0x3e0 net/core/net_namespace.c:303 [] copy_net_ns+0xd2/0x190 net/core/net_namespace.c:369 [] create_new_namespaces+0x2f6/0x610 kernel/nsproxy.c:95 [] unshare_nsproxy_namespaces+0xae/0x1e0 kernel/nsproxy.c:190 [] SYSC_unshare kernel/fork.c:2068 [inline] [] SyS_unshare+0x3da/0x700 kernel/fork.c:2018 [] entry_SYSCALL_64_fastpath+0x1c/0x98 Code: f9 83 01 00 0f 84 d8 00 00 00 4d 8d 77 38 49 bc 00 00 00 00 00 fc ff df 49 81 c7 b8 00 00 00 e8 47 45 3c fe 4c 89 f0 48 c1 e8 03 <42> 80 3c 20 00 0f 85 f4 01 00 00 49 8b 1e e8 fd 96 2e fe 48 85 RIP [] __read_once_size include/linux/compiler.h:218 [inline] RIP [] nfqnl_nf_hook_drop+0x190/0x3a0 net/netfilter/nfnetlink_queue.c:879 RSP ---[ end trace 27a70ddf4a9061a9 ]---