netdev - Re: [net PATCH v2 3/7] octeontx2-af: Add validation for lmac type

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Date:   Sat, 8 Apr 2023 16:42:30 +0200
From:   Simon Horman <simon.horman@...igine.com>
To:     Sai Krishna <saikrishnag@...vell.com>
Cc:     davem@...emloft.net, edumazet@...gle.com, kuba@...nel.org,
        pabeni@...hat.com, netdev@...r.kernel.org,
        linux-kernel@...r.kernel.org, sgoutham@...vell.com,
        gakula@...vell.com, richardcochran@...il.com, lcherian@...vell.com,
        jerinj@...vell.com, hkelam@...vell.com, sbhatta@...vell.com
Subject: Re: [net PATCH v2 3/7] octeontx2-af: Add validation for lmac type

On Fri, Apr 07, 2023 at 05:53:40PM +0530, Sai Krishna wrote:
> From: Hariprasad Kelam <hkelam@...vell.com>
> 
> Upon physical link change, firmware reports to the kernel about the
> change along with the details like speed, lmac_type_id, etc.
> Kernel derives lmac_type based on lmac_type_id received from firmware.
> 
> In a few scenarios, firmware returns an invalid lmac_type_id, which
> is resulting in below kernel panic. This patch adds the missing
> validation of the lmac_type_id field.
> 
> Internal error: Oops: 96000005 [#1] PREEMPT SMP
> [   35.321595] Modules linked in:
> [   35.328982] CPU: 0 PID: 31 Comm: kworker/0:1 Not tainted
> 5.4.210-g2e3169d8e1bc-dirty #17
> [   35.337014] Hardware name: Marvell CN103XX board (DT)
> [   35.344297] Workqueue: events work_for_cpu_fn
> [   35.352730] pstate: 40400089 (nZcv daIf +PAN -UAO)
> [   35.360267] pc : strncpy+0x10/0x30
> [   35.366595] lr : cgx_link_change_handler+0x90/0x180
> 
> Fixes: 61071a871ea6 ("octeontx2-af: Forward CGX link notifications to PFs")
> Signed-off-by: Hariprasad Kelam <hkelam@...vell.com>
> Signed-off-by: Sunil Kovvuri Goutham <sgoutham@...vell.com>
> Signed-off-by: Sai Krishna <saikrishnag@...vell.com>
> 
>  drivers/net/ethernet/marvell/octeontx2/af/cgx.c | 8 ++++++++
>  1 file changed, 8 insertions(+)

Reviewed-by: Simon Horman <simon.horman@...igine.com>