===================================== [ BUG: bad unlock balance detected! ] 4.4.113-g202e079 #1 Not tainted ------------------------------------- syz-executor2/10630 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-executor2/10630: #0: (&p->lock){+.+.+.}, at: [] seq_read+0xdd/0x1270 fs/seq_file.c:178 stack backtrace: CPU: 1 PID: 10630 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 c8896b82048abe00 ffff8801cf3af930 ffffffff81d0278d ffffffff84771c18 ffff8800b33b5f00 ffffffff833c5524 ffffffff84771c18 ffff8800b33b6748 ffff8801cf3af960 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 netlink: 7 bytes leftover after parsing attributes in process `syz-executor1'. netlink: 7 bytes leftover after parsing attributes in process `syz-executor1'. TCP: request_sock_TCP: Possible SYN flooding on port 20010. Sending cookies. Check SNMP counters. TCP: request_sock_TCP: Possible SYN flooding on port 20006. Sending cookies. Check SNMP counters. TCP: request_sock_TCP: Possible SYN flooding on port 20010. Sending cookies. Check SNMP counters. TCP: request_sock_TCP: Possible SYN flooding on port 20006. Sending cookies. Check SNMP counters. TCP: request_sock_TCP: Possible SYN flooding on port 20010. Sending cookies. Check SNMP counters. TCP: request_sock_TCP: Possible SYN flooding on port 20010. Sending cookies. Check SNMP counters. TCP: request_sock_TCP: Possible SYN flooding on port 20006. Sending cookies. Check SNMP counters. TCP: request_sock_TCP: Possible SYN flooding on port 20006. Sending cookies. Check SNMP counters. TCP: request_sock_TCP: Possible SYN flooding on port 20010. Sending cookies. Check SNMP counters. TCP: request_sock_TCP: Possible SYN flooding on port 20006. Sending cookies. Check SNMP counters. TCP: request_sock_TCP: Possible SYN flooding on port 20010. Sending cookies. Check SNMP counters. TCP: request_sock_TCP: Possible SYN flooding on port 20010. Sending cookies. Check SNMP counters. TCP: request_sock_TCP: Possible SYN flooding on port 20006. Sending cookies. Check SNMP counters. TCP: request_sock_TCP: Possible SYN flooding on port 20010. Sending cookies. Check SNMP counters. TCP: request_sock_TCP: Possible SYN flooding on port 20006. Sending cookies. Check SNMP counters. TCP: request_sock_TCP: Possible SYN flooding on port 20006. Sending cookies. Check SNMP counters. TCP: request_sock_TCP: Possible SYN flooding on port 20010. Sending cookies. Check SNMP counters. TCP: request_sock_TCP: Possible SYN flooding on port 20006. Sending cookies. Check SNMP counters. TCP: request_sock_TCP: Possible SYN flooding on port 20010. Sending cookies. Check SNMP counters. TCP: request_sock_TCP: Possible SYN flooding on port 20010. Sending cookies. Check SNMP counters. TCP: request_sock_TCP: Possible SYN flooding on port 20006. Sending cookies. Check SNMP counters. TCP: request_sock_TCP: Possible SYN flooding on port 20010. Sending cookies. Check SNMP counters. TCP: request_sock_TCP: Possible SYN flooding on port 20006. Sending cookies. Check SNMP counters. TCP: request_sock_TCP: Possible SYN flooding on port 20006. Sending cookies. Check SNMP counters. TCP: request_sock_TCP: Possible SYN flooding on port 20010. Sending cookies. Check SNMP counters. TCP: request_sock_TCP: Possible SYN flooding on port 20006. Sending cookies. Check SNMP counters. TCP: request_sock_TCP: Possible SYN flooding on port 20010. Sending cookies. Check SNMP counters. TCP: request_sock_TCP: Possible SYN flooding on port 20010. Sending cookies. Check SNMP counters. TCP: request_sock_TCP: Possible SYN flooding on port 20022. Sending cookies. Check SNMP counters. TCP: request_sock_TCP: Possible SYN flooding on port 20010. Sending cookies. Check SNMP counters. TCP: request_sock_TCP: Possible SYN flooding on port 20006. Sending cookies. Check SNMP counters. TCP: request_sock_TCP: Possible SYN flooding on port 20010. Sending cookies. Check SNMP counters. TCP: request_sock_TCP: Possible SYN flooding on port 20006. Sending cookies. Check SNMP counters. audit: type=1400 audit(1517180827.363:48): avc: denied { bind } for pid=11974 comm="syz-executor7" scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tclass=netlink_netfilter_socket permissive=1 TCP: request_sock_TCP: Possible SYN flooding on port 20006. Sending cookies. Check SNMP counters. TCP: request_sock_TCP: Possible SYN flooding on port 20006. Sending cookies. Check SNMP counters. TCP: request_sock_TCP: Possible SYN flooding on port 20010. Sending cookies. Check SNMP counters. TCP: request_sock_TCP: Possible SYN flooding on port 20010. Sending cookies. Check SNMP counters. TCP: request_sock_TCP: Possible SYN flooding on port 20006. Sending cookies. Check SNMP counters. audit: type=1400 audit(1517180827.713:49): avc: denied { create } for pid=12089 comm="syz-executor7" scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tclass=netlink_scsitransport_socket permissive=1 TCP: request_sock_TCP: Possible SYN flooding on port 20006. Sending cookies. Check SNMP counters. TCP: request_sock_TCP: Possible SYN flooding on port 20010. Sending cookies. Check SNMP counters. audit: type=1400 audit(1517180827.793:50): avc: denied { create } for pid=12119 comm="syz-executor7" scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tclass=netlink_fib_lookup_socket permissive=1 TCP: request_sock_TCP: Possible SYN flooding on port 20010. Sending cookies. Check SNMP counters. audit: type=1400 audit(1517180827.833:51): avc: denied { bind } for pid=12119 comm="syz-executor7" scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tclass=netlink_fib_lookup_socket permissive=1 TCP: request_sock_TCP: Possible SYN flooding on port 20010. Sending cookies. Check SNMP counters. TCP: request_sock_TCP: Possible SYN flooding on port 20006. Sending cookies. Check SNMP counters. TCP: request_sock_TCP: Possible SYN flooding on port 20006. Sending cookies. Check SNMP counters. TCP: request_sock_TCP: Possible SYN flooding on port 20010. Sending cookies. Check SNMP counters. TCP: request_sock_TCP: Possible SYN flooding on port 20006. Sending cookies. Check SNMP counters. TCP: request_sock_TCP: Possible SYN flooding on port 20010. Sending cookies. Check SNMP counters. TCP: request_sock_TCP: Possible SYN flooding on port 20006. Sending cookies. Check SNMP counters. TCP: request_sock_TCP: Possible SYN flooding on port 20010. Sending cookies. Check SNMP counters. TCP: request_sock_TCP: Possible SYN flooding on port 20010. Sending cookies. Check SNMP counters. TCP: request_sock_TCP: Possible SYN flooding on port 20010. Sending cookies. Check SNMP counters. TCP: request_sock_TCP: Possible SYN flooding on port 20010. Sending cookies. Check SNMP counters. TCP: request_sock_TCP: Possible SYN flooding on port 20006. Sending cookies. Check SNMP counters. TCP: request_sock_TCP: Possible SYN flooding on port 20010. Sending cookies. Check SNMP counters. TCP: request_sock_TCP: Possible SYN flooding on port 20010. Sending cookies. Check SNMP counters. TCP: request_sock_TCP: Possible SYN flooding on port 20006. Sending cookies. Check SNMP counters. TCP: request_sock_TCP: Possible SYN flooding on port 20010. Sending cookies. Check SNMP counters. TCP: request_sock_TCP: Possible SYN flooding on port 20006. Sending cookies. Check SNMP counters. TCP: request_sock_TCP: Possible SYN flooding on port 20006. Sending cookies. Check SNMP counters. TCP: request_sock_TCP: Possible SYN flooding on port 20010. Sending cookies. Check SNMP counters. TCP: request_sock_TCP: Possible SYN flooding on port 20010. Sending cookies. Check SNMP counters. TCP: request_sock_TCP: Possible SYN flooding on port 20006. Sending cookies. Check SNMP counters. TCP: request_sock_TCP: Possible SYN flooding on port 20006. Sending cookies. Check SNMP counters. TCP: request_sock_TCP: Possible SYN flooding on port 20010. Sending cookies. Check SNMP counters. TCP: request_sock_TCP: Possible SYN flooding on port 20010. Sending cookies. Check SNMP counters. TCP: request_sock_TCP: Possible SYN flooding on port 20010. Sending cookies. Check SNMP counters. TCP: request_sock_TCP: Possible SYN flooding on port 20010. Sending cookies. Check SNMP counters. TCP: request_sock_TCP: Possible SYN flooding on port 20010. Sending cookies. Check SNMP counters. netlink: 6 bytes leftover after parsing attributes in process `syz-executor4'. netlink: 6 bytes leftover after parsing attributes in process `syz-executor4'. TCP: request_sock_TCP: Possible SYN flooding on port 20006. Sending cookies. Check SNMP counters. TCP: request_sock_TCP: Possible SYN flooding on port 20006. Sending cookies. Check SNMP counters. TCP: request_sock_TCP: Possible SYN flooding on port 20006. Sending cookies. Check SNMP counters. binder: 13248:13252 transaction failed 29189/-22, size 0-0 line 3005 TCP: request_sock_TCP: Possible SYN flooding on port 20006. Sending cookies. Check SNMP counters. binder: 13248:13272 transaction failed 29189/-22, size 0-0 line 3005 binder: undelivered TRANSACTION_ERROR: 29189