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Sat, 16 May 2026 08:32:00 -0700 (PDT) From: Qi Tang To: kuba@kernel.org, willemdebruijn.kernel@gmail.com Cc: davem@davemloft.net, dsahern@kernel.org, edumazet@google.com, pabeni@redhat.com, horms@kernel.org, netdev@vger.kernel.org, linux-kernel@vger.kernel.org, Qi Tang Subject: Re: [PATCH net v4] ipv6: validate extension header length before copying to cmsg Date: Sat, 16 May 2026 23:31:55 +0800 Message-ID: <20260516153155.2678332-1-tpluszz77@gmail.com> X-Mailer: git-send-email 2.47.3 In-Reply-To: References: <20260514035802.1540395-1-tpluszz77@gmail.com> <20260515175522.0aafbfb4@kernel.org> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit On Sat, 16 May 2026 at 09:41:07 -0400, Willem de Bruijn wrote: > Jakub Kicinski wrote: > > return (len <= skb_tail_pointer(skb) - ptr) ? len : 0; > > If making changes, also time to replace the open coded offset > with sizeof ipv6_opt_hdr and opt_hdr->hdrlen? > Or perhaps better left for net-next. Thanks, both make sense. I'll fold the tail-ptr subtraction into v5 and post the typed-access refactor against net-next right after. Qi