netdev - Re: [PATCH net-next 2/2] ixgbe: fix end of loop test in ixgbe_set_vf

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Message-ID: <ZR/toAqmRnTWljdy@kernel.org>
Date: Fri, 6 Oct 2023 13:21:04 +0200
From: Simon Horman <horms@...nel.org>
To: Dan Carpenter <dan.carpenter@...aro.org>
Cc: Jinjie Ruan <ruanjinjie@...wei.com>,
	Jesse Brandeburg <jesse.brandeburg@...el.com>,
	Tony Nguyen <anthony.l.nguyen@...el.com>,
	"David S. Miller" <davem@...emloft.net>,
	Eric Dumazet <edumazet@...gle.com>,
	Jakub Kicinski <kuba@...nel.org>, Paolo Abeni <pabeni@...hat.com>,
	Jacob Keller <jacob.e.keller@...el.com>,
	intel-wired-lan@...ts.osuosl.org, netdev@...r.kernel.org,
	kernel-janitors@...r.kernel.org
Subject: Re: [PATCH net-next 2/2] ixgbe: fix end of loop test in
 ixgbe_set_vf_macvlan()

On Thu, Oct 05, 2023 at 04:58:01PM +0300, Dan Carpenter wrote:
> The list iterator in a list_for_each_entry() loop can never be NULL.
> If the loop exits without hitting a break then the iterator points
> to an offset off the list head and dereferencing it is an out of
> bounds access.
> 
> Before we transitioned to using list_for_each_entry() loops, then
> it was possible for "entry" to be NULL and the comments mention
> this.  I have updated the comments to match the new code.
> 
> Fixes: c1fec890458a ("ethernet/intel: Use list_for_each_entry() helper")
> Signed-off-by: Dan Carpenter <dan.carpenter@...aro.org>

Reviewed-by: Simon Horman <horms@...nel.org>