syzbot

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BUG: KCSAN: data-race in ipvlan_open / is_upper_ndev_bond_master_filter

read-write to 0xffff88811728b0b0 of 4 bytes by task 18495 on cpu 1:
 ipvlan_open+0x6f/0xe0
 __dev_open+0x1f7/0x2e0 net/core/dev.c:1506
 __dev_change_flags+0x155/0x410 net/core/dev.c:8968
 rtnl_configure_link net/core/rtnetlink.c:3542 [inline]
 rtnl_newlink_create+0x2ac/0x5d0 net/core/rtnetlink.c:3794
 __rtnl_newlink net/core/rtnetlink.c:3897 [inline]
 rtnl_newlink+0xe9f/0x1250 net/core/rtnetlink.c:4012
 rtnetlink_rcv_msg+0x651/0x710 net/core/rtnetlink.c:6922
 netlink_rcv_skb+0x12c/0x230 net/netlink/af_netlink.c:2542
 rtnetlink_rcv+0x1c/0x30 net/core/rtnetlink.c:6949
 netlink_unicast_kernel net/netlink/af_netlink.c:1321 [inline]
 netlink_unicast+0x599/0x670 net/netlink/af_netlink.c:1347
 netlink_sendmsg+0x5cc/0x6e0 net/netlink/af_netlink.c:1891
 sock_sendmsg_nosec net/socket.c:711 [inline]
 __sock_sendmsg+0x140/0x180 net/socket.c:726
 ____sys_sendmsg+0x312/0x410 net/socket.c:2583
 ___sys_sendmsg net/socket.c:2637 [inline]
 __sys_sendmsg+0x19d/0x230 net/socket.c:2669
 __do_sys_sendmsg net/socket.c:2674 [inline]
 __se_sys_sendmsg net/socket.c:2672 [inline]
 __x64_sys_sendmsg+0x46/0x50 net/socket.c:2672
 x64_sys_call+0x2734/0x2dc0 arch/x86/include/generated/asm/syscalls_64.h:47
 do_syscall_x64 arch/x86/entry/common.c:52 [inline]
 do_syscall_64+0xc9/0x1c0 arch/x86/entry/common.c:83
 entry_SYSCALL_64_after_hwframe+0x77/0x7f

read to 0xffff88811728b0b0 of 4 bytes by task 16098 on cpu 0:
 netif_is_bond_master include/linux/netdevice.h:5153 [inline]
 is_upper_ndev_bond_master_filter+0x2b/0xb0 drivers/infiniband/core/roce_gid_mgmt.c:275
 ib_enum_roce_netdev+0x124/0x1d0 drivers/infiniband/core/device.c:2355
 ib_enum_all_roce_netdevs+0x8a/0x100 drivers/infiniband/core/device.c:2382
 netdevice_event_work_handler+0x67/0x3c0 drivers/infiniband/core/roce_gid_mgmt.c:648
 process_one_work kernel/workqueue.c:3236 [inline]
 process_scheduled_works+0x483/0x9a0 kernel/workqueue.c:3317
 worker_thread+0x51d/0x6f0 kernel/workqueue.c:3398
 kthread+0x1d1/0x210 kernel/kthread.c:389
 ret_from_fork+0x4b/0x60 arch/x86/kernel/process.c:147
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244

value changed: 0x00008002 -> 0x00008083

Reported by Kernel Concurrency Sanitizer on:
CPU: 0 UID: 0 PID: 16098 Comm: kworker/u8:26 Not tainted 6.13.0-syzkaller-00164-g100ceb4817a2 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 12/27/2024
Workqueue: gid-cache-wq netdevice_event_work_handler
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IPVS: Schedule: port zero only supported in persistent services, check your ipvs configuration