> From: Intel-wired-lan On Behalf Of
> Li,Rongqing
> Sent: Tuesday, January 12, 2021 8:24 AM
> To: Alexander Duyck
> Cc: Netdev ; Topel, Bjorn ;
> intel-wired-lan
> Subject: Re: [Intel-wired-lan] [PATCH] igb: avoid premature Rx buffer reuse
>
>
>
> >
> -Original Message-
> From: Alexander Duyck [mailto:alexander.du...@gmail.com]
> Sent: Wednesday, January 13, 2021 5:23 AM
> To: Li,Rongqing
> Cc: Netdev ; intel-wired-lan
> ; Björn Töpel
> Subject: Re: [PATCH] igb: avoid premature Rx buffer r
> Okay, this explanation makes much more
; ; Björn Töpel
> > Subject: Re: [PATCH] igb: avoid premature Rx buffer reuse
> >
> > On Wed, Jan 6, 2021 at 7:53 PM Li RongQing wrote:
> > >
> > > The page recycle code, incorrectly, relied on that a page fragment
> > > could not be freed inside xdp_do
> -Original Message-
> From: Alexander Duyck [mailto:alexander.du...@gmail.com]
> Sent: Tuesday, January 12, 2021 4:54 AM
> To: Li,Rongqing
> Cc: Netdev ; intel-wired-lan
> ; Björn Töpel
> Subject: Re: [PATCH] igb: avoid premature Rx buffer reuse
>
> On Wed
On Wed, Jan 6, 2021 at 7:53 PM Li RongQing wrote:
>
> The page recycle code, incorrectly, relied on that a page fragment
> could not be freed inside xdp_do_redirect(). This assumption leads to
> that page fragments that are used by the stack/XDP redirect can be
> reused and overwritten.
>
> To avo
The page recycle code, incorrectly, relied on that a page fragment
could not be freed inside xdp_do_redirect(). This assumption leads to
that page fragments that are used by the stack/XDP redirect can be
reused and overwritten.
To avoid this, store the page count prior invoking xdp_do_redirect().
