Re: [PATCH v2 4/5] libvhost-user: prevent over-running max RAM slots

[Stefan Hajnoczi]

On Thu, Jan 06, 2022 at 06:47:35AM +0000, Raphael Norwitz wrote:
> When VHOST_USER_PROTOCOL_F_CONFIGURE_MEM_SLOTS support was added to
> libvhost-user, no guardrails were added to protect against QEMU
> attempting to hot-add too many RAM slots to a VM with a libvhost-user
> based backed attached.
> 
> This change adds the missing error handling by introducing a check on
> the number of RAM slots the device has available before proceeding to
> process the VHOST_USER_ADD_MEM_REG message.
> 
> Suggested-by: Stefan Hajnoczi <stefanha@redhat.com>
> Signed-off-by: Raphael Norwitz <raphael.norwitz@nutanix.com>
> ---
>  subprojects/libvhost-user/libvhost-user.c | 5 +++++
>  1 file changed, 5 insertions(+)

Reviewed-by: Stefan Hajnoczi <stefanha@redhat.com>

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