============================= WARNING: suspicious RCU usage 4.14.111 #1 Not tainted ----------------------------- net/tipc/bearer.c:177 suspicious rcu_dereference_protected() usage! other info that might help us debug this: rcu_scheduler_active = 2, debug_locks = 1 2 locks held by syz-executor.5/9188: #0: (cb_lock){++++}, at: [] genl_rcv+0x1a/0x40 net/netlink/genetlink.c:635 #1: (genl_mutex){+.+.}, at: [] genl_lock net/netlink/genetlink.c:33 [inline] #1: (genl_mutex){+.+.}, at: [] genl_rcv_msg+0x119/0x150 net/netlink/genetlink.c:623 stack backtrace: CPU: 0 PID: 9188 Comm: syz-executor.5 Not tainted 4.14.111 #1 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 protocol 88fb is buggy, dev hsr_slave_0 Call Trace: protocol 88fb is buggy, dev hsr_slave_1 __dump_stack lib/dump_stack.c:17 [inline] dump_stack+0x138/0x19c lib/dump_stack.c:53 lockdep_rcu_suspicious+0x153/0x15d kernel/locking/lockdep.c:4665 tipc_bearer_find+0x20a/0x300 net/tipc/bearer.c:177 tipc_nl_compat_link_set+0x421/0xbe0 net/tipc/netlink_compat.c:770 __tipc_nl_compat_doit net/tipc/netlink_compat.c:298 [inline] tipc_nl_compat_doit+0x170/0x520 net/tipc/netlink_compat.c:345 tipc_nl_compat_handle net/tipc/netlink_compat.c:1167 [inline] tipc_nl_compat_recv+0x9be/0xaf0 net/tipc/netlink_compat.c:1249 genl_family_rcv_msg+0x61c/0xc40 net/netlink/genetlink.c:600 genl_rcv_msg+0xb4/0x150 net/netlink/genetlink.c:625 netlink_rcv_skb+0x152/0x3c0 net/netlink/af_netlink.c:2432 genl_rcv+0x29/0x40 net/netlink/genetlink.c:636 netlink_unicast_kernel net/netlink/af_netlink.c:1286 [inline] netlink_unicast+0x466/0x780 net/netlink/af_netlink.c:1312 netlink_sendmsg+0x7c4/0xc60 net/netlink/af_netlink.c:1877 protocol 88fb is buggy, dev hsr_slave_0 sock_sendmsg_nosec net/socket.c:646 [inline] sock_sendmsg+0xd0/0x110 net/socket.c:656 ___sys_sendmsg+0x70c/0x850 net/socket.c:2062 protocol 88fb is buggy, dev hsr_slave_1 __sys_sendmsg+0xb9/0x140 net/socket.c:2096 SYSC_sendmsg net/socket.c:2107 [inline] SyS_sendmsg+0x2d/0x50 net/socket.c:2103 do_syscall_64+0x1eb/0x630 arch/x86/entry/common.c:289 entry_SYSCALL_64_after_hwframe+0x42/0xb7 RIP: 0033:0x4582f9 RSP: 002b:00007f5eb23c0c78 EFLAGS: 00000246 ORIG_RAX: 000000000000002e RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 00000000004582f9 RDX: 0000000000000000 RSI: 00000000200004c0 RDI: 0000000000000005 RBP: 000000000073bf00 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00007f5eb23c16d4 R13: 00000000004c5687 R14: 00000000004d9888 R15: 00000000ffffffff protocol 88fb is buggy, dev hsr_slave_0 protocol 88fb is buggy, dev hsr_slave_1 protocol 88fb is buggy, dev hsr_slave_0 protocol 88fb is buggy, dev hsr_slave_1 misc userio: No port type given on /dev/userio net_ratelimit: 18 callbacks suppressed protocol 88fb is buggy, dev hsr_slave_0 protocol 88fb is buggy, dev hsr_slave_1 misc userio: No port type given on /dev/userio misc userio: No port type given on /dev/userio protocol 88fb is buggy, dev hsr_slave_0 protocol 88fb is buggy, dev hsr_slave_1 protocol 88fb is buggy, dev hsr_slave_0 protocol 88fb is buggy, dev hsr_slave_1 netlink: 48 bytes leftover after parsing attributes in process `syz-executor.1'. protocol 88fb is buggy, dev hsr_slave_0 protocol 88fb is buggy, dev hsr_slave_1 protocol 88fb is buggy, dev hsr_slave_0 protocol 88fb is buggy, dev hsr_slave_1 netlink: 48 bytes leftover after parsing attributes in process `syz-executor.1'. netlink: 48 bytes leftover after parsing attributes in process `syz-executor.1'. misc userio: No port type given on /dev/userio misc userio: No port type given on /dev/userio misc userio: No port type given on /dev/userio misc userio: Invalid payload size misc userio: No port type given on /dev/userio misc userio: Invalid payload size misc userio: No port type given on /dev/userio misc userio: Invalid payload size misc userio: No port type given on /dev/userio misc userio: No port type given on /dev/userio SELinux: unrecognized netlink message: protocol=4 nlmsg_type=0 sclass=netlink_tcpdiag_socket pig=9675 comm=syz-executor.1 SELinux: unrecognized netlink message: protocol=4 nlmsg_type=0 sclass=netlink_tcpdiag_socket pig=9685 comm=syz-executor.1 misc userio: No port type given on /dev/userio SELinux: unrecognized netlink message: protocol=4 nlmsg_type=0 sclass=netlink_tcpdiag_socket pig=9704 comm=syz-executor.1 misc userio: No port type given on /dev/userio