netdev - Re: [PATCH bpf-next] bpf: Use hlist_add_head_rcu when linking to local

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Date:   Sat, 19 Sep 2020 01:16:33 +0200
From:   Daniel Borkmann <daniel@...earbox.net>
To:     Martin KaFai Lau <kafai@...com>, bpf@...r.kernel.org
Cc:     Alexei Starovoitov <ast@...nel.org>, kernel-team@...com,
        netdev@...r.kernel.org
Subject: Re: [PATCH bpf-next] bpf: Use hlist_add_head_rcu when linking to
 local_storage

On 9/16/20 10:44 PM, 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 <kafai@...com>

Applied, thanks!