syzbot

==================================================================
BUG: KCSAN: data-race in bond_enslave / is_eth_port_of_netdev_filter.part.0

write to 0xffff888088e4d21c of 4 bytes by task 416 on cpu 0:
 bond_enslave+0x5f6/0x2590 drivers/net/bonding/bond_main.c:1610
 do_set_master net/core/rtnetlink.c:2470 [inline]
 do_set_master+0x15c/0x180 net/core/rtnetlink.c:2443
 __rtnl_newlink+0xe0f/0xfb0 net/core/rtnetlink.c:3360
 rtnl_newlink+0x5f/0x90 net/core/rtnetlink.c:3391
 rtnetlink_rcv_msg+0x1d0/0x4e0 net/core/rtnetlink.c:5454
 netlink_rcv_skb+0xaf/0x260 net/netlink/af_netlink.c:2469
 rtnetlink_rcv+0x22/0x30 net/core/rtnetlink.c:5472
 netlink_unicast_kernel net/netlink/af_netlink.c:1303 [inline]
 netlink_unicast+0x390/0x4c0 net/netlink/af_netlink.c:1329
 netlink_sendmsg+0x4cf/0x8a0 net/netlink/af_netlink.c:1918
 sock_sendmsg_nosec net/socket.c:652 [inline]
 sock_sendmsg+0x98/0xc0 net/socket.c:672
 ____sys_sendmsg+0x493/0x4c0 net/socket.c:2362
 ___sys_sendmsg+0xb5/0x100 net/socket.c:2416
 __sys_sendmsg+0x9b/0x150 net/socket.c:2449
 __do_sys_sendmsg net/socket.c:2458 [inline]
 __se_sys_sendmsg net/socket.c:2456 [inline]
 __x64_sys_sendmsg+0x4c/0x60 net/socket.c:2456
 do_syscall_64+0xc7/0x3b0 arch/x86/entry/common.c:295
 entry_SYSCALL_64_after_hwframe+0x44/0xa9

read to 0xffff888088e4d21c of 4 bytes by task 22967 on cpu 1:
 rdma_vlan_dev_real_dev include/rdma/ib_addr.h:293 [inline]
 is_eth_port_of_netdev_filter.part.0+0x2c/0x130 drivers/infiniband/core/roce_gid_mgmt.c:157
 is_eth_port_of_netdev_filter+0x32/0x50 drivers/infiniband/core/roce_gid_mgmt.c:153
 ib_enum_roce_netdev+0x126/0x1d0 drivers/infiniband/core/device.c:2270
 ib_enum_all_roce_netdevs+0x8f/0xf0 drivers/infiniband/core/device.c:2299
 netdevice_event_work_handler+0x7c/0x100 drivers/infiniband/core/roce_gid_mgmt.c:623
 process_one_work+0x424/0x930 kernel/workqueue.c:2268
 worker_thread+0x9a/0x7e0 kernel/workqueue.c:2414
 kthread+0x203/0x230 kernel/kthread.c:268
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:352

Reported by Kernel Concurrency Sanitizer on:
CPU: 1 PID: 22967 Comm: kworker/u4:11 Not tainted 5.7.0-rc1-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Workqueue: gid-cache-wq netdevice_event_work_handler
==================================================================