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[213.179.129.39]) by smtp.gmail.com with ESMTPSA id m25-20020a7bcb99000000b003f195d540d9sm15044720wmi.14.2023.05.23.06.26.31 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Tue, 23 May 2023 06:26:31 -0700 (PDT) Date: Tue, 23 May 2023 15:26:30 +0200 From: Jiri Pirko To: Gavrilov Ilia Cc: "David S. Miller" , David Ahern , Eric Dumazet , Jakub Kicinski , Paolo Abeni , Vlad Yasevich , "netdev@vger.kernel.org" , "linux-kernel@vger.kernel.org" , "lvc-project@linuxtesting.org" Subject: Re: [PATCH net] ipv6: Fix out-of-bounds access in ipv6_find_tlv() Message-ID: References: <20230523082903.117626-1-Ilia.Gavrilov@infotecs.ru> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20230523082903.117626-1-Ilia.Gavrilov@infotecs.ru> X-Spam-Status: No, score=-1.9 required=5.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,RCVD_IN_DNSWL_NONE,SPF_HELO_NONE,SPF_NONE, T_SCC_BODY_TEXT_LINE autolearn=ham autolearn_force=no version=3.4.6 X-Spam-Checker-Version: SpamAssassin 3.4.6 (2021-04-09) on lindbergh.monkeyblade.net Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Tue, May 23, 2023 at 10:29:44AM CEST, Ilia.Gavrilov@infotecs.ru wrote: >optlen is fetched without checking whether there is more than one byte to parse. >It can lead to out-of-bounds access. > >Found by InfoTeCS on behalf of Linux Verification Center >(linuxtesting.org) with SVACE. > >Fixes: 3c73a0368e99 ("ipv6: Update ipv6 static library with newly needed functions") >Signed-off-by: Gavrilov Ilia Reviewed-by: Jiri Pirko