[PATCH 2/2] vhost: validate fds attached to messages

[Maxime Coquelin]

On 4/25/22 14:54, David Marchand wrote:
> Some message handlers do not expect any file descriptor attached as
> ancillary data.
> Provide a common way to enforce this by adding a accepts_fd boolean in
> the message handler structure. When a message handler sets accepts_fd to
> true, it is responsible for calling validate_msg_fds with a right
> expected file descriptor count.
> This will avoid leaking some file descriptor by mistake when adding
> support for new vhost user message types.
> 
> Signed-off-by: David Marchand <david.marchand at redhat.com>
> ---
>   lib/vhost/vhost_user.c | 145 ++++++++++++-----------------------------
>   1 file changed, 43 insertions(+), 102 deletions(-)
> 

Reviewed-by: Maxime Coquelin <maxime.coquelin at redhat.com>

Thanks,
Maxime