netdev - RE: [Intel-wired-lan] [PATCH iwl-next v2] i40e: fix MMIO write access to an invalid page in i40e_clear

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Message-ID: <SJ0PR11MB58666E39C43B2808821CE336E5A42@SJ0PR11MB5866.namprd11.prod.outlook.com>
Date: Mon, 24 Mar 2025 09:27:24 +0000
From: "Loktionov, Aleksandr" <aleksandr.loktionov@...el.com>
To: "Rinitha, SX" <sx.rinitha@...el.com>, Kyungwook Boo
	<bookyungwook@...il.com>, "Kitszel, Przemyslaw"
	<przemyslaw.kitszel@...el.com>, "Nguyen, Anthony L"
	<anthony.l.nguyen@...el.com>
CC: "intel-wired-lan@...ts.osuosl.org" <intel-wired-lan@...ts.osuosl.org>,
	"netdev@...r.kernel.org" <netdev@...r.kernel.org>
Subject: RE: [Intel-wired-lan] [PATCH iwl-next v2] i40e: fix MMIO write access
 to an invalid page in i40e_clear_hw



> -----Original Message-----
> From: Rinitha, SX <sx.rinitha@...el.com>
> Sent: Friday, March 21, 2025 5:47 AM
> To: Kyungwook Boo <bookyungwook@...il.com>; Loktionov, Aleksandr
> <aleksandr.loktionov@...el.com>; Kitszel, Przemyslaw
> <przemyslaw.kitszel@...el.com>; Nguyen, Anthony L
> <anthony.l.nguyen@...el.com>
> Cc: intel-wired-lan@...ts.osuosl.org; netdev@...r.kernel.org
> Subject: RE: [Intel-wired-lan] [PATCH iwl-next v2] i40e: fix MMIO write access
> to an invalid page in i40e_clear_hw
> 
> > -----Original Message-----
> > From: Intel-wired-lan <intel-wired-lan-bounces@...osl.org> On Behalf Of
> Kyungwook Boo
> > Sent: 11 March 2025 10:46
> > To: Loktionov, Aleksandr <aleksandr.loktionov@...el.com>; Kitszel,
> Przemyslaw <przemyslaw.kitszel@...el.com>; Nguyen, Anthony L
> <anthony.l.nguyen@...el.com>
> Cc: intel-wired-lan@...ts.osuosl.org; netdev@...r.kernel.org
> > Subject: [Intel-wired-lan] [PATCH iwl-next v2] i40e: fix MMIO write access to
> an invalid page in i40e_clear_hw
> >
> > When the device sends a specific input, an integer underflow can occur,
> leading to MMIO write access to an invalid page.
> >
> > Prevent the integer underflow by changing the type of related variables.
> >
> > Signed-off-by: Kyungwook Boo <bookyungwook@...il.com>
> > Link: https://lore.kernel.org/lkml/ffc91764-1142-4ba2-91b6-
> 8c773f6f7095@...il.com/T/
Reviewed-by: Aleksandr Loktionov <aleksandr.loktionov@...el.com>

> > ---
> > Changes in v2:
> > - Formatting properly
> > - Fix variable shadowing
> > - Link to v1: https://lore.kernel.org/netdev/55acc5dc-8d5a-45bc-a59c-
> 9304071e4579@...il.com/
> > ---
> > drivers/net/ethernet/intel/i40e/i40e_common.c | 7 ++++---
> > 1 file changed, 4 insertions(+), 3 deletions(-)
> >
> 
> Tested-by: Rinitha S <sx.rinitha@...el.com> (A Contingent worker at Intel)