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BUG: KCSAN: data-race in ipvlan_open / is_upper_ndev_bond_master_filter

read-write to 0xffff8881232190b0 of 4 bytes by task 31299 on cpu 0:
 ipvlan_open+0x74/0x100 drivers/net/ipvlan/ipvlan_main.c:-1
 __dev_open+0x305/0x550 net/core/dev.c:1724
 __dev_change_flags+0x1c8/0x490 net/core/dev.c:9812
 rtnl_configure_link+0x171/0x2a0 net/core/rtnetlink.c:3720
 rtnl_newlink_create+0x219/0x4a0 net/core/rtnetlink.c:3977
 __rtnl_newlink net/core/rtnetlink.c:4098 [inline]
 rtnl_newlink+0x1255/0x1510 net/core/rtnetlink.c:4215
 rtnetlink_rcv_msg+0x64b/0x720 net/core/rtnetlink.c:7132
 netlink_rcv_skb+0x11e/0x220 net/netlink/af_netlink.c:2556
 rtnetlink_rcv+0x1c/0x30 net/core/rtnetlink.c:7159
 netlink_unicast_kernel net/netlink/af_netlink.c:1319 [inline]
 netlink_unicast+0x5a9/0x680 net/netlink/af_netlink.c:1345
 netlink_sendmsg+0x5be/0x6f0 net/netlink/af_netlink.c:1900
 sock_sendmsg_nosec net/socket.c:800 [inline]
 __sock_sendmsg net/socket.c:815 [inline]
 ____sys_sendmsg+0x532/0x580 net/socket.c:2713
 ___sys_sendmsg+0x195/0x1e0 net/socket.c:2767
 __sys_sendmsg net/socket.c:2799 [inline]
 __do_sys_sendmsg net/socket.c:2804 [inline]
 __se_sys_sendmsg net/socket.c:2802 [inline]
 __x64_sys_sendmsg+0xd4/0x160 net/socket.c:2802
 x64_sys_call+0x22ab/0x2550 arch/x86/include/generated/asm/syscalls_64.h:47
 do_syscall_x64 arch/x86/entry/syscall_64.c:61 [inline]
 do_syscall_64+0x112/0x360 arch/x86/entry/syscall_64.c:84
 entry_SYSCALL_64_after_hwframe+0x77/0x7f

read to 0xffff8881232190b0 of 4 bytes by task 11725 on cpu 1:
 netif_is_bond_master include/linux/netdevice.h:5589 [inline]
 is_upper_ndev_bond_master_filter+0x2b/0xb0 drivers/infiniband/core/roce_gid_mgmt.c:275
 ib_enum_roce_netdev+0x117/0x1d0 drivers/infiniband/core/device.c:2574
 ib_enum_all_roce_netdevs+0x89/0x100 drivers/infiniband/core/device.c:2601
 netdevice_event_work_handler+0x15d/0x3d0 drivers/infiniband/core/roce_gid_mgmt.c:648
 process_one_work kernel/workqueue.c:3387 [inline]
 process_scheduled_works+0x56a/0xa50 kernel/workqueue.c:3470
 worker_thread+0x569/0x750 kernel/workqueue.c:3551
 kthread+0x223/0x270 kernel/kthread.c:436
 ret_from_fork+0x146/0x330 arch/x86/kernel/process.c:158
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245

value changed: 0x0000e026 -> 0x0000e0a7

Reported by Kernel Concurrency Sanitizer on:
CPU: 1 UID: 0 PID: 11725 Comm: kworker/u8:30 Tainted: G        W           syzkaller #0 PREEMPT(lazy) 
Tainted: [W]=WARN
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/24/2026
Workqueue: gid-cache-wq netdevice_event_work_handler
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