================================================================== BUG: KCSAN: data-race in __dev_change_flags / is_upper_ndev_bond_master_filter read-write to 0xffff88814d4a40c0 of 4 bytes by task 1739 on cpu 1: __dev_change_flags+0xa3/0x400 net/core/dev.c:8571 rtnl_configure_link net/core/rtnetlink.c:3296 [inline] rtnl_newlink_create net/core/rtnetlink.c:3493 [inline] __rtnl_newlink net/core/rtnetlink.c:3705 [inline] rtnl_newlink+0x1200/0x1670 net/core/rtnetlink.c:3718 rtnetlink_rcv_msg+0x807/0x8c0 net/core/rtnetlink.c:6444 netlink_rcv_skb+0x126/0x220 net/netlink/af_netlink.c:2545 rtnetlink_rcv+0x1c/0x20 net/core/rtnetlink.c:6462 netlink_unicast_kernel net/netlink/af_netlink.c:1342 [inline] netlink_unicast+0x589/0x650 net/netlink/af_netlink.c:1368 netlink_sendmsg+0x66e/0x770 net/netlink/af_netlink.c:1910 sock_sendmsg_nosec net/socket.c:730 [inline] sock_sendmsg net/socket.c:753 [inline] ____sys_sendmsg+0x37c/0x4d0 net/socket.c:2541 ___sys_sendmsg net/socket.c:2595 [inline] __sys_sendmsg+0x1e9/0x270 net/socket.c:2624 __do_sys_sendmsg net/socket.c:2633 [inline] __se_sys_sendmsg net/socket.c:2631 [inline] __x64_sys_sendmsg+0x46/0x50 net/socket.c:2631 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x41/0xc0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x63/0xcd read to 0xffff88814d4a40c0 of 4 bytes by task 31944 on cpu 0: netif_is_bond_master include/linux/netdevice.h:5027 [inline] is_upper_ndev_bond_master_filter+0x2b/0xb0 drivers/infiniband/core/roce_gid_mgmt.c:275 ib_enum_roce_netdev+0x120/0x1c0 drivers/infiniband/core/device.c:2305 ib_enum_all_roce_netdevs+0x8a/0xf0 drivers/infiniband/core/device.c:2334 netdevice_event_work_handler+0x15b/0x3c0 drivers/infiniband/core/roce_gid_mgmt.c:627 process_one_work kernel/workqueue.c:2630 [inline] process_scheduled_works+0x5b8/0xa30 kernel/workqueue.c:2703 worker_thread+0x525/0x730 kernel/workqueue.c:2784 kthread+0x1d7/0x210 kernel/kthread.c:388 ret_from_fork+0x48/0x60 arch/x86/kernel/process.c:147 ret_from_fork_asm+0x11/0x20 arch/x86/entry/entry_64.S:304 value changed: 0x00001002 -> 0x00005006 Reported by Kernel Concurrency Sanitizer on: CPU: 0 PID: 31944 Comm: kworker/u4:66 Not tainted 6.6.0-rc3-syzkaller-00044-g633b47cb009d #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/06/2023 Workqueue: gid-cache-wq netdevice_event_work_handler ==================================================================