IPVS: set_ctl: invalid protocol: 65286 0.0.0.0:60696 ===================================== [ BUG: bad unlock balance detected! ] 4.9.78-g7be1985 #24 Not tainted ------------------------------------- syz-executor6/23707 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-executor6/23707: IPVS: set_ctl: invalid protocol: 65286 0.0.0.0:60696 #0: (&p->lock){+.+.+.}, at: [] seq_read+0xdd/0x1290 fs/seq_file.c:178 stack backtrace: CPU: 1 PID: 23707 Comm: syz-executor6 Not tainted 4.9.78-g7be1985 #24 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 ffff8801ba217860 ffffffff81d94409 ffffffff849b6c78 ffff8801d85c0000 ffffffff834e8764 ffffffff849b6c78 ffff8801d85c0888 ffff8801ba217890 ffffffff81237df4 dffffc0000000000 ffffffff849b6c78 00000000ffffffff Call Trace: [] __dump_stack lib/dump_stack.c:15 [inline] [] dump_stack+0xc1/0x128 lib/dump_stack.c:51 [] print_unlock_imbalance_bug+0x174/0x1a0 kernel/locking/lockdep.c:3398 [] __lock_release kernel/locking/lockdep.c:3540 [inline] [] lock_release+0x6f8/0xb80 kernel/locking/lockdep.c:3775 [] __raw_read_unlock include/linux/rwlock_api_smp.h:225 [inline] [] _raw_read_unlock+0x1a/0x50 kernel/locking/spinlock.c:255 binder_alloc: binder_alloc_mmap_handler: 23721 2033d000-2033e000 already mapped failed -16 [] ipmr_mfc_seq_stop+0xe4/0x140 net/ipv6/ip6mr.c:553 [] traverse+0x3a7/0x900 fs/seq_file.c:148 [] seq_read+0x7ea/0x1290 fs/seq_file.c:195 [] proc_reg_read+0xef/0x170 fs/proc/inode.c:202 [] do_loop_readv_writev.part.17+0x141/0x1e0 fs/read_write.c:714 [] do_loop_readv_writev fs/read_write.c:880 [inline] [] do_readv_writev+0x520/0x750 fs/read_write.c:874 [] vfs_readv+0x84/0xc0 fs/read_write.c:898 [] do_preadv+0x115/0x1a0 fs/read_write.c:975 [] SYSC_preadv fs/read_write.c:1025 [inline] [] SyS_preadv+0x30/0x40 fs/read_write.c:1020 [] entry_SYSCALL_64_fastpath+0x29/0xe8 device gre0 entered promiscuous mode device gre0 entered promiscuous mode Can not set IPV6_FL_F_REFLECT if flowlabel_consistency sysctl is enable Can not set IPV6_FL_F_REFLECT if flowlabel_consistency sysctl is enable unregister_netdevice: waiting for lo to become free. Usage count = 3