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Date:   Thu, 16 May 2019 11:35:02 -0700
From:   Alexei Starovoitov <>
To:     Chenbo Feng <>
Cc:     Network Development <>,
        Android Kernel Team <>,
        Lorenzo Colitti <>,
        Maciej ┼╗enczykowski <>,
        Daniel Borkmann <>,
        Alexei Starovoitov <>
Subject: Re: [PATCH bpf] bpf: relax inode permission check for retrieving bpf program

On Tue, May 14, 2019 at 7:43 PM Chenbo Feng <> wrote:
> For iptable module to load a bpf program from a pinned location, it
> only retrieve a loaded program and cannot change the program content so
> requiring a write permission for it might not be necessary.
> Also when adding or removing an unrelated iptable rule, it might need to
> flush and reload the xt_bpf related rules as well and triggers the inode
> permission check. It might be better to remove the write premission
> check for the inode so we won't need to grant write access to all the
> processes that flush and restore iptables rules.
> Signed-off-by: Chenbo Feng <>

Applied. The fix makes sense to me.

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