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Date:   Thu, 7 May 2020 11:45:37 -0700
From:   Cong Wang <>
To:     Nikolay Aleksandrov <>
Cc:     Linux Kernel Network Developers <>,
        syzbot <>,,
        Josh Poimboeuf <>,
        Jay Vosburgh <>,
        Jann Horn <>
Subject: Re: [Patch net v2] net: fix a potential recursive NETDEV_FEAT_CHANGE

On Wed, May 6, 2020 at 1:31 PM Nikolay Aleksandrov
<> wrote:
> The patch looks good, but note that __netdev_update_features() used to return -1
> before the commit in the Fixes tag above (between 6cb6a27c45ce and 00ee59271777).
> It only restored that behaviour.

Good point! But commit fd867d51f889 is the one which started
using netdev_update_features() in netdev_sync_lower_features(),
your commits 00ee59271777 and 17b85d29e82c are both after it,
and returning whatever doesn't matter before commit fd867d51f889,
therefore, commit fd867d51f889 is the right one to blame?

I will send V3 to just update this Fixes tag.


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