lo speed is unknown, defaulting to 1000
lo speed is unknown, defaulting to 1000
lo speed is unknown, defaulting to 1000
==================================================================
BUG: KCSAN: assert: race in __block_task kernel/sched/sched.h:2770 [inline]
BUG: KCSAN: assert: race in dequeue_entities+0x6df/0x760 kernel/sched/fair.c:7177

race at unknown origin, with assert no writes to 0xffff888102fed2e8 of 4 bytes by task 15768 on cpu 0:
 __block_task kernel/sched/sched.h:2770 [inline]
 dequeue_entities+0x6df/0x760 kernel/sched/fair.c:7177
 pick_next_entity kernel/sched/fair.c:5627 [inline]
 pick_task_fair kernel/sched/fair.c:8856 [inline]
 pick_next_task_fair+0x7d/0x410 kernel/sched/fair.c:8876
 __pick_next_task kernel/sched/core.c:5955 [inline]
 pick_next_task kernel/sched/core.c:6477 [inline]
 __schedule+0x284/0x940 kernel/sched/core.c:6629
 __schedule_loop kernel/sched/core.c:6752 [inline]
 schedule+0x55/0xc0 kernel/sched/core.c:6767
 schedule_preempt_disabled+0x10/0x20 kernel/sched/core.c:6824
 __mutex_lock_common kernel/locking/mutex.c:684 [inline]
 __mutex_lock+0x36d/0x8e0 kernel/locking/mutex.c:752
 __mutex_lock_slowpath+0xa/0x10 kernel/locking/mutex.c:1040
 mutex_lock+0x2d/0x40 kernel/locking/mutex.c:286
 rtnl_lock+0x15/0x20 net/core/rtnetlink.c:79
 ib_get_eth_speed+0xcb/0x4a0 drivers/infiniband/core/verbs.c:1995
 siw_query_port+0x3d/0x240 drivers/infiniband/sw/siw/siw_verbs.c:179
 iw_query_port drivers/infiniband/core/device.c:2100 [inline]
 ib_query_port+0x369/0x3a0 drivers/infiniband/core/device.c:2141
 ib_setup_port_attrs+0x148/0x1340 drivers/infiniband/core/sysfs.c:1440
 add_one_compat_dev+0x2e6/0x3e0 drivers/infiniband/core/device.c:975
 add_compat_devs drivers/infiniband/core/device.c:1033 [inline]
 enable_device_and_get+0x1cb/0x260 drivers/infiniband/core/device.c:1344
 ib_register_device+0xa92/0xbf0 drivers/infiniband/core/device.c:1449
 siw_device_register drivers/infiniband/sw/siw/siw_main.c:72 [inline]
 siw_newlink+0x69a/0x6e0 drivers/infiniband/sw/siw/siw_main.c:452
 nldev_newlink+0x32f/0x360 drivers/infiniband/core/nldev.c:1795
 rdma_nl_rcv_msg drivers/infiniband/core/netlink.c:195 [inline]
 rdma_nl_rcv_skb drivers/infiniband/core/netlink.c:239 [inline]
 rdma_nl_rcv+0x46f/0x5a0 drivers/infiniband/core/netlink.c:259
 netlink_unicast_kernel net/netlink/af_netlink.c:1331 [inline]
 netlink_unicast+0x599/0x670 net/netlink/af_netlink.c:1357
 netlink_sendmsg+0x5cc/0x6e0 net/netlink/af_netlink.c:1901
 sock_sendmsg_nosec net/socket.c:730 [inline]
 __sock_sendmsg+0x140/0x180 net/socket.c:745
 ____sys_sendmsg+0x312/0x410 net/socket.c:2603
 ___sys_sendmsg net/socket.c:2657 [inline]
 __sys_sendmsg+0x1d9/0x270 net/socket.c:2686
 __do_sys_sendmsg net/socket.c:2695 [inline]
 __se_sys_sendmsg net/socket.c:2693 [inline]
 __x64_sys_sendmsg+0x46/0x50 net/socket.c:2693
 x64_sys_call+0x2689/0x2d60 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

value changed: 0x00000000 -> 0x00000001

Reported by Kernel Concurrency Sanitizer on:
CPU: 0 UID: 0 PID: 15768 Comm: +}[@ Not tainted 6.11.0-syzkaller-11558-g075dbe9f6e3c #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024
==================================================================
lo speed is unknown, defaulting to 1000
lo speed is unknown, defaulting to 1000
lo speed is unknown, defaulting to 1000
+}[@ (15768) used greatest stack depth: 9064 bytes left