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

Greg KH
2021-01-11T12:46:19Z

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
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to these common problems, but in order to save his sanity (he kept
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