[dpdk-stable] [dpdk-dev] [PATCH] net/octeontx2: fix corruption in segments list

[Jerin Jacob]

On Mon, Dec 28, 2020 at 5:48 PM Nithin Dabilpuram <nithind1988 at gmail.com> wrote:
>
> On Mon, Dec 21, 2020 at 07:33:08PM +0530, skori at marvell.com wrote:
> > From: Sunil Kumar Kori <skori at marvell.com>
> >
> > On Tx, lastseg->next is not being reset to null for multi segmented packet
> > and same mbuf can be used on Rx which has a stale mbuf entry into
> > mbuf->next.
> >
> > On Rx, application receives mbuf with mbuf->next uninitialized though
> > mbuf->nb_segs is correct. Application iterates over all segments using
> > mbuf->next ignoring mbuf->nb_segs which leads to undefined behavior.
> >
> > So earlier assumption of just having right value in mbuf->nb_segs is
> > enough, is incorrect. Mbuf must contain valid and synced value in
> > nb_segs and next pointer.
> >
> > Fixes: 364eb0e46683 ("net/octeontx2: avoid per packet barrier with multi segment")
> > Cc: stable at dpdk.org
> >
> > Signed-off-by: Sunil Kumar Kori <skori at marvell.com>

> >
>
> Acked-by: Nithin Dabilpuram <ndabilpuram at marvell.com>

Applied to dpdk-next-net-mrvl/for-main. Thanks