Re: [PATCH] octeontx2-af: Fix possible buffer overflow

[Simon Horman]

On Thu, Nov 23, 2023 at 08:36:30PM +0300, Elena Salomatkina wrote:
> A loop in rvu_mbox_handler_nix_bandprof_free() contains
> a break if (idx == MAX_BANDPROF_PER_PFFUNC),
> but if idx may reach MAX_BANDPROF_PER_PFFUNC
> buffer '(*req->prof_idx)[layer]' overflow happens before that check.
> 
> The patch moves the break to the
> beginning of the loop.
> 
> Found by Linux Verification Center (linuxtesting.org) with SVACE.
> 
> Fixes: e8e095b3b370 ("octeontx2-af: cn10k: Bandwidth profiles config support").
> Signed-off-by: Elena Salomatkina <elena.salomatkina.cmc@xxxxxxxxx>

Thanks Elena,

I agree with your analysis and that this seems to be
an appropriate fix for the problem.

As this is a fix, it should be targeted at the net, as opposed to net-next,
tree.  Please keep this in mind for future patch submissions.

	Subject: [PATCH net] ...

Link https://docs.kernel.org/process/maintainer-netdev.html

The above nit notwithstanding,

Reviewed-by: Simon Horman <horms@xxxxxxxxxx>