Re: [PATCH net-next v3] net/ionic: avoid OOB TX partner lookup for hwstamp RXQ

[Simon Horman]

On Thu, Aug 13, 2026 at 08:37:05AM +0000, Anand Khoje wrote:
> The dedicated hardware timestamp RX queue is allocated with q->index
> equal to lif->ionic->nrxqs_per_lif. The normal txqcqs array only
> contains the regular queue pairs, so using that index to set rxq->partner
> can read one entry past txqcqs[] and then write through the derived
> pointer.
> Only link RX/TX partners for normal queue-pair indexes. Leave the hwstamp
> RX queue unpaired, and make the XDP_TX path abort cleanly if an RX queue
> has no TX partner.
> 
> Fixes: 8eeed8373e1c ("ionic: Add XDP_TX support")
> Signed-off-by: Anand Khoje <anand.a.khoje@xxxxxxxxxx>
> Reviewed-by: Si-Wei Liu <si-wei.liu@xxxxxxxxxx>
> Reviewed-by: Shannon Nelson <sln@xxxxxxxxxxx>
> Cc: stable@xxxxxxxxxxxxxxx
> ---
> v3:
>  Use dev_err() and return -ENXIO for a missing normal TX partner.
> 
> v2:
>  Correct the Fixes tag.

Reviewed-by: Simon Horman <horms@xxxxxxxxxx>