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Date: Thu, 2 Jan 2020 18:04:48 +0000 From: Yonghong Song <yhs@...com> To: Martin Lau <kafai@...com>, "bpf@...r.kernel.org" <bpf@...r.kernel.org> CC: Alexei Starovoitov <ast@...nel.org>, Daniel Borkmann <daniel@...earbox.net>, David Miller <davem@...emloft.net>, Kernel Team <Kernel-team@...com>, "netdev@...r.kernel.org" <netdev@...r.kernel.org> Subject: Re: [PATCH bpf-next v3 04/11] bpf: Support bitfield read access in btf_struct_access On 12/30/19 10:20 PM, Martin KaFai Lau wrote: > This patch allows bitfield access as a scalar. > > It checks "off + size > t->size" to avoid accessing bitfield > end up accessing beyond the struct. This check is done > outside of the loop since it is applicable to all access. > > It also takes this chance to break early on the "off < moff" case. > > Signed-off-by: Martin KaFai Lau <kafai@...com> Acked-by: Yonghong Song <yhs@...com>
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