KCSAN: data-race in bond_compute_features / is_eth_port_of_netdev

Kernel	Title	Rank 🛈	Repro	Cause bisect	Fix bisect	Count	Last	Reported	Patched	Status
upstream	KCSAN: data-race in bond_compute_features / is_eth_port_of_netdev_filter (2) net	6				1	1695d	1695d	0/29	auto-closed as invalid on 2021/02/11 05:34

================================================================== BUG: KCSAN: data-race in bond_compute_features / is_eth_port_of_netdev_filter write to 0xffff88810fc7e22c of 4 bytes by task 2991 on cpu 1: bond_compute_features+0x405/0x440 drivers/net/bonding/bond_main.c:1304 __bond_release_one+0x759/0xb90 drivers/net/bonding/bond_main.c:2140 bond_slave_netdev_event drivers/net/bonding/bond_main.c:3309 [inline] bond_netdev_event+0x2b3/0x670 drivers/net/bonding/bond_main.c:3420 notifier_call_chain kernel/notifier.c:83 [inline] raw_notifier_call_chain+0x53/0xb0 kernel/notifier.c:410 call_netdevice_notifiers_info net/core/dev.c:2035 [inline] call_netdevice_notifiers_extack net/core/dev.c:2047 [inline] call_netdevice_notifiers net/core/dev.c:2061 [inline] rollback_registered_many+0x876/0xe40 net/core/dev.c:9422 unregister_netdevice_many net/core/dev.c:10626 [inline] default_device_exit_batch+0x250/0x3d0 net/core/dev.c:11109 ops_exit_list net/core/net_namespace.c:190 [inline] cleanup_net+0x4cc/0x8a0 net/core/net_namespace.c:604 process_one_work+0x3e1/0x950 kernel/workqueue.c:2272 worker_thread+0x635/0xb90 kernel/workqueue.c:2418 kthread+0x1fd/0x220 kernel/kthread.c:292 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:296 read to 0xffff88810fc7e22c of 4 bytes by task 9430 on cpu 0: is_vlan_dev include/linux/if_vlan.h:74 [inline] rdma_vlan_dev_real_dev include/rdma/ib_addr.h:266 [inline] is_eth_port_of_netdev_filter+0x29/0x1a0 drivers/infiniband/core/roce_gid_mgmt.c:157 ib_enum_roce_netdev+0x292/0x310 drivers/infiniband/core/device.c:2263 ib_enum_all_roce_netdevs+0x94/0x100 drivers/infiniband/core/device.c:2292 netdevice_event_work_handler+0x63/0x200 drivers/infiniband/core/roce_gid_mgmt.c:626 process_one_work+0x3e1/0x950 kernel/workqueue.c:2272 worker_thread+0x635/0xb90 kernel/workqueue.c:2418 kthread+0x1fd/0x220 kernel/kthread.c:292 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:296 Reported by Kernel Concurrency Sanitizer on: CPU: 0 PID: 9430 Comm: kworker/u4:2 Not tainted 5.10.0-rc5-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Workqueue: gid-cache-wq netdevice_event_work_handler ==================================================================