Re: [PATCH] VMCI: Enforce queuepair max size for IOCTL_VMCI_QUEUEPAIR_ALLOC

[Greg KH <gregkh@linuxfoundation.org>]

On Mon, Jan 11, 2021 at 04:18:53AM -0800, Jorgen Hansen wrote:
> When create the VMCI queue pair tracking data structures on the host
> side, the IOCTL for creating the VMCI queue pair didn't validate
> the queue pair size parameters. This change adds checks for this.
> 
> This avoids a memory allocation issue in qp_host_alloc_queue, as
> reported by nslusarek@gmx.net. The check in qp_host_alloc_queue
> has also been updated to enforce the maximum queue pair size
> as defined by VMCI_MAX_GUEST_QP_MEMORY.
> 
> The fix has been verified using sample code supplied by
> nslusarek@gmx.net.
> 
> Reported-by: nslusarek@gmx.net
> Reviewed-by: Vishnu Dasa <vdasa@vmware.com>
> Signed-off-by: Jorgen Hansen <jhansen@vmware.com>
> ---
>  drivers/misc/vmw_vmci/vmci_queue_pair.c | 12 ++++++++----
>  include/linux/vmw_vmci_defs.h           |  4 ++--
>  2 files changed, 10 insertions(+), 6 deletions(-)

Hi,

This is the friendly patch-bot of Greg Kroah-Hartman.  You have sent him
a patch that has triggered this response.  He used to manually respond
to these common problems, but in order to save his sanity (he kept
writing the same thing over and over, yet to different people), I was
created.  Hopefully you will not take offence and will fix the problem
in your patch and resubmit it so that it can be accepted into the Linux
kernel tree.

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thanks,

greg k-h's patch email bot