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Date:   Thu, 17 Sep 2020 15:15:56 -0700
From:   Song Liu <>
To:     Martin KaFai Lau <>
Cc:     bpf <>, Alexei Starovoitov <>,
        Daniel Borkmann <>,
        Kernel Team <>,
        Networking <>
Subject: Re: [PATCH bpf-next] bpf: Use hlist_add_head_rcu when linking to local_storage

On Thu, Sep 17, 2020 at 9:57 AM Martin KaFai Lau <> wrote:
> The local_storage->list will be traversed by rcu reader in parallel.
> Thus, hlist_add_head_rcu() is needed in bpf_selem_link_storage_nolock().
> This patch fixes it.
> This part of the code has recently been refactored in bpf-next
> and this patch makes changes to the new file "bpf_local_storage.c".
> Instead of using the original offending commit in the Fixes tag,
> the commit that created the file "bpf_local_storage.c" is used.
> A separate fix has been provided to the bpf tree.
> Fixes: 450af8d0f6be ("bpf: Split bpf_local_storage to bpf_sk_storage")
> Signed-off-by: Martin KaFai Lau <>

Acked-by: Song Liu <>

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