On 2020-08-25 11:55, Li,Rongqing wrote:
-----Original Message-----
From: Björn Töpel [mailto:bjorn.to...@gmail.com]
Sent: Tuesday, August 25, 2020 5:16 PM
To: jeffrey.t.kirs...@intel.com; intel-wired-...@lists.osuosl.org
Cc: Björn Töpel <bjorn.to...@intel.com>; magnus.karls...@intel.com;
magnus.karls...@gmail.com; netdev@vger.kernel.org;
maciej.fijalkow...@intel.com; piotr.raczyn...@intel.com;
maciej.machnikow...@intel.com; Li,Rongqing <lirongq...@baidu.com>
Subject: [PATCH net 2/3] ixgbe: avoid premature Rx buffer reuse
From: Björn Töpel <bjorn.to...@intel.com>
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().
Fixes: 6453073987ba ("ixgbe: add initial support for xdp redirect")
Signed-off-by: Björn Töpel <bjorn.to...@intel.com>
Reported-and-analyzed-by: Li RongQing <lirongq...@baidu.com>
Thanks Li! I should have added that. Intel-folks, please make sure Li's
tags for ixgbe/ice are added.
Björn
Thanks
-Li
