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Date:   Mon, 28 Mar 2022 10:35:42 +0800
From:   Xiaomeng Tong <>
Subject: Re: [PATCH] dsa: bcm_sf2_cfp: fix an incorrect NULL check on list iterator

On Sun, 27 Mar 2022 21:58:05 +0300, Vladimir Oltean wrote:
> On Sun, Mar 27, 2022 at 01:55:47PM +0800, Xiaomeng Tong wrote:
> > The bug is here:
> > 	return rule;
> > 
> > The list iterator value 'rule' will *always* be set and non-NULL
> > by list_for_each_entry(), so it is incorrect to assume that the
> > iterator value will be NULL if the list is empty or no element
> > is found.
> > 
> > To fix the bug, return 'rule' when found, otherwise return NULL.
> > 
> > Cc:
> > Fixes: ae7a5aff783c7 ("net: dsa: bcm_sf2: Keep copy of inserted rules")
> > Signed-off-by: Xiaomeng Tong <>
> > ---
> The change looks correct, but from a process standpoint for next time
> (a) you should have copied Florian, the driver's maintainer (which I did now)
>     who appears on the top of the list in the output of ./
> (b) networking bugfixes that apply to the "net" tree shouldn't need
> copied, instead just target the patch against
>     the
>     tree and mark the subject prefix as "[PATCH net]".
> Reviewed-by: Vladimir Oltean <>

Thank you for your patient review and good suggestion, i got it.
I'm sorry I forgot to copy Florian.

Xiaomeng tong

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