Re: Host Crash When creating a vDPA Device with device_features

["Michael S. Tsirkin" <mst@redhat.com>]

On Thu, Jul 03, 2025 at 11:58:26AM +0800, Wenli Quan wrote:
> Hello all:
> 
> I am reporting a issue where the host system crashed when attempting to add a
> vDPA device using the command:
> 
> # uname -r
> 
> 6.16.0-rc2
> 
> # modprobe vdpa
> 
> # modprobe vhost-vdpa
> 
> # modprobe mlx5-vdpa
> 
> # echo 1 > /sys/class/net/ens7f1np1/device/sriov_numvfs
> 
> # lspci |grep -i Mell
> 
> 61:00.0 Ethernet controller: Mellanox Technologies MT43244 BlueField-3
> integrated ConnectX-7 network controller (rev 01)
> 
> 61:00.1 Ethernet controller: Mellanox Technologies MT43244 BlueField-3
> integrated ConnectX-7 network controller (rev 01)
> 
> 61:00.2 DMA controller: Mellanox Technologies MT43244 BlueField-3 SoC
> Management Interface (rev 01)
> 
> b5:00.0 Ethernet controller: Mellanox Technologies MT2892 Family [ConnectX-6
> Dx]
> 
> b5:00.1 Ethernet controller: Mellanox Technologies MT2892 Family [ConnectX-6
> Dx]
> 
> b5:03.2 Ethernet controller: Mellanox Technologies ConnectX Family mlx5Gen
> Virtual Function
> 
> #vdpa dev add name vdpa0 mgmtdev pci/0000:b5:03.2 device_features 0x300c31829
> 
> 
> Then the host creatshed, please check the crash dump in attachment.
> 


....

Thanks a lot for the report! How reproducible is this? Bisectable to
a specific commit?

-- 
MST