syzbot

==================================================================
BUG: KCSAN: data-race in __dev_change_flags / is_eth_port_of_netdev_filter

read-write to 0xffff8881198840b0 of 4 bytes by task 5068 on cpu 1:
 __dev_change_flags+0x9a/0x400 net/core/dev.c:9432
 rtnl_configure_link net/core/rtnetlink.c:3577 [inline]
 rtnl_newlink_create+0x36b/0x620 net/core/rtnetlink.c:3833
 __rtnl_newlink net/core/rtnetlink.c:3940 [inline]
 rtnl_newlink+0xf29/0x12d0 net/core/rtnetlink.c:4055
 rtnetlink_rcv_msg+0x5fe/0x6d0 net/core/rtnetlink.c:6944
 netlink_rcv_skb+0x120/0x220 net/netlink/af_netlink.c:2552
 rtnetlink_rcv+0x1c/0x30 net/core/rtnetlink.c:6971
 netlink_unicast_kernel net/netlink/af_netlink.c:1320 [inline]
 netlink_unicast+0x5a8/0x680 net/netlink/af_netlink.c:1346
 netlink_sendmsg+0x58b/0x6b0 net/netlink/af_netlink.c:1896
 sock_sendmsg_nosec net/socket.c:712 [inline]
 __sock_sendmsg+0x145/0x180 net/socket.c:727
 ____sys_sendmsg+0x31e/0x4e0 net/socket.c:2566
 ___sys_sendmsg+0x17b/0x1d0 net/socket.c:2620
 __sys_sendmsg net/socket.c:2652 [inline]
 __do_sys_sendmsg net/socket.c:2657 [inline]
 __se_sys_sendmsg net/socket.c:2655 [inline]
 __x64_sys_sendmsg+0xd4/0x160 net/socket.c:2655
 x64_sys_call+0x2999/0x2fb0 arch/x86/include/generated/asm/syscalls_64.h:47
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0xd2/0x200 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f

read to 0xffff8881198840b0 of 4 bytes by task 4193 on cpu 0:
 netif_is_bond_master include/linux/netdevice.h:5368 [inline]
 is_eth_active_slave_of_bonding_rcu drivers/infiniband/core/roce_gid_mgmt.c:132 [inline]
 is_eth_port_of_netdev_filter+0x8c/0x1b0 drivers/infiniband/core/roce_gid_mgmt.c:162
 ib_enum_roce_netdev+0x122/0x1d0 drivers/infiniband/core/device.c:2381
 ib_enum_all_roce_netdevs+0x89/0x100 drivers/infiniband/core/device.c:2408
 netdevice_event_work_handler+0x253/0x3d0 drivers/infiniband/core/roce_gid_mgmt.c:648
 process_one_work kernel/workqueue.c:3238 [inline]
 process_scheduled_works+0x4cb/0x9d0 kernel/workqueue.c:3321
 worker_thread+0x582/0x770 kernel/workqueue.c:3402
 kthread+0x489/0x510 kernel/kthread.c:464
 ret_from_fork+0xda/0x150 arch/x86/kernel/process.c:148
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245

value changed: 0x00001002 -> 0x00008002

Reported by Kernel Concurrency Sanitizer on:
CPU: 0 UID: 0 PID: 4193 Comm: kworker/u8:9 Not tainted 6.16.0-rc7-syzkaller #0 PREEMPT(voluntary) 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025
Workqueue: gid-cache-wq netdevice_event_work_handler
==================================================================