virsh blkdeviotune在线调整虚机的qos会导致libvirtd段错误，发生coredump并crash退出

【环境信息】
硬件信息：
1）	Intel x86
软件信息：
1）	openeuler 2203 LTS-SP1
2）	kernel 5.10.0-136.24.0.100.oe2203sp1.x86_64
3）	libvirt 6.2.0-49.x86_64
【问题复现步骤】
必现，对运行中的虚机执行virsh blkdeviotune [domid] [disk_path] --read-iops-sec 10000会导致libvirtd发生coredump并重启。
设置读写iops或速率均会出现问题。
而通过virsh qemu-monitor-command直接调用qmp的方式设置iops没有问题
【预期结果】
命令正常结束，libvirtd不重启
【实际结果】
命令报错，libvirtd引发coredump并重启
【排查结果】
经过debug，执行到函数qemuDomainDiskBlockIoTuneIsSupported时引发段错误
该函数位于libvirt-6.2.0-49.x86_64.src包内的qemu-implement-vhost-user-blk-support.patch
不包含该patch的版本没有问题，且libvirt-6.2.0-50.x86_64没有修复该问题
【附件信息】
(gdb) backtrace
#0  qemuDomainSetBlockIoTune (dom=0x7f158c003670, path=0x7f158c000b90 "vda", params=<optimized out>, nparams=<optimized out>,
    flags=<optimized out>) at ../../src/qemu/qemu_driver.c:19304
#1  0x00007f159e517214 in virDomainSetBlockIoTune (dom=dom@entry=0x7f158c003670, disk=0x7f158c000b90 "vda", params=<optimized out>,
    nparams=1, flags=0) at ../../src/libvirt-domain.c:10747
#2  0x0000561e7fafb5a7 in remoteDispatchDomainSetBlockIoTune (server=0x561e81931db0, msg=0x561e8196def0, args=0x7f158c007a20,
    rerr=0x7f159ad00920, client=<optimized out>) at ./remote/remote_daemon_dispatch_stubs.h:10701
#3  remoteDispatchDomainSetBlockIoTuneHelper (server=0x561e81931db0, client=<optimized out>, msg=0x561e8196def0, rerr=0x7f159ad00920,
    args=0x7f158c007a20, ret=0x0) at ./remote/remote_daemon_dispatch_stubs.h:10671
#4  0x00007f159e4a1c90 in virNetServerProgramDispatchCall (msg=0x561e8196def0, client=0x561e8196db10, server=0x561e81931db0,
    prog=0x561e8198b080) at ../../src/rpc/virnetserverprogram.c:430
#5  virNetServerProgramDispatch (prog=0x561e8198b080, server=server@entry=0x561e81931db0, client=0x561e8196db10, msg=0x561e8196def0)
    at ../../src/rpc/virnetserverprogram.c:302
#6  0x00007f159e4a6b84 in virNetServerProcessMsg (msg=<optimized out>, prog=<optimized out>, client=<optimized out>, srv=0x561e81931db0)
    at ../../src/rpc/virnetserver.c:137
#7  virNetServerHandleJob (jobOpaque=0x561e8196dd70, opaque=0x561e81931db0) at ../../src/rpc/virnetserver.c:154
#8  0x00007f159e3bb012 in virThreadPoolWorker (opaque=<optimized out>) at ../../src/util/virthreadpool.c:163
#9  0x00007f159e3ba605 in virThreadHelper (data=<optimized out>) at ../../src/util/virthread.c:233
#10 0x00007f159d63b22a in start_thread (arg=<optimized out>) at pthread_create.c:443
#11 0x00007f159d6bdcf0 in clone3 () at ../sysdeps/unix/sysv/linux/x86_64/clone3.S:81
(gdb) f
#0  qemuDomainSetBlockIoTune (dom=0x7f158c003670, path=0x7f158c000b90 "vda", params=<optimized out>, nparams=<optimized out>,
    flags=<optimized out>) at ../../src/qemu/qemu_driver.c:19304
19304           if (!qemuDomainDiskBlockIoTuneIsSupported(conf_disk->src))

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