syzbot

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BUG: KCSAN: data-race in __dev_change_flags / is_ndev_for_default_gid_filter

read-write to 0xffff888108fc60c0 of 4 bytes by task 5264 on cpu 1:
 __dev_change_flags+0xa3/0x400 net/core/dev.c:8504
 rtnl_configure_link net/core/rtnetlink.c:3283 [inline]
 rtnl_newlink_create net/core/rtnetlink.c:3480 [inline]
 __rtnl_newlink net/core/rtnetlink.c:3689 [inline]
 rtnl_newlink+0x119e/0x1600 net/core/rtnetlink.c:3702
 rtnetlink_rcv_msg+0x807/0x8c0 net/core/rtnetlink.c:6424
 netlink_rcv_skb+0x126/0x220 net/netlink/af_netlink.c:2549
 rtnetlink_rcv+0x1c/0x20 net/core/rtnetlink.c:6442
 netlink_unicast_kernel net/netlink/af_netlink.c:1339 [inline]
 netlink_unicast+0x56f/0x640 net/netlink/af_netlink.c:1365
 netlink_sendmsg+0x665/0x770 net/netlink/af_netlink.c:1914
 sock_sendmsg_nosec net/socket.c:725 [inline]
 sock_sendmsg net/socket.c:748 [inline]
 ____sys_sendmsg+0x37c/0x4d0 net/socket.c:2494
 ___sys_sendmsg net/socket.c:2548 [inline]
 __sys_sendmsg+0x1e9/0x270 net/socket.c:2577
 __do_sys_sendmsg net/socket.c:2586 [inline]
 __se_sys_sendmsg net/socket.c:2584 [inline]
 __x64_sys_sendmsg+0x46/0x50 net/socket.c:2584
 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 0xffff888108fc60c0 of 4 bytes by task 11206 on cpu 0:
 netif_is_bond_master include/linux/netdevice.h:5048 [inline]
 is_ndev_for_default_gid_filter+0x37/0x140 drivers/infiniband/core/roce_gid_mgmt.c:220
 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+0x434/0x860 kernel/workqueue.c:2597
 worker_thread+0x5f2/0xa10 kernel/workqueue.c:2748
 kthread+0x1d7/0x210 kernel/kthread.c:389
 ret_from_fork+0x2e/0x40 arch/x86/kernel/process.c:145
 ret_from_fork_asm+0x11/0x20 arch/x86/entry/entry_64.S:296

value changed: 0x00001002 -> 0x00001086

Reported by Kernel Concurrency Sanitizer on:
CPU: 0 PID: 11206 Comm: kworker/u4:40 Not tainted 6.5.0-rc2-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/03/2023
Workqueue: gid-cache-wq netdevice_event_work_handler
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