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[198.0.35.241]) by smtp.gmail.com with ESMTPSA id o14-20020a17090a4b4e00b00268b439a0cbsm1057998pjl.23.2023.08.04.01.30.09 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Fri, 04 Aug 2023 01:30:09 -0700 (PDT) Date: Fri, 4 Aug 2023 01:30:09 -0700 From: Kees Cook To: Alexander Lobakin Cc: "David S. Miller" , Eric Dumazet , Jakub Kicinski , Paolo Abeni , Larysa Zaremba , Andy Shevchenko , "Gustavo A. R. Silva" , netdev@vger.kernel.org, linux-hardening@vger.kernel.org, intel-wired-lan@lists.osuosl.org, linux-kernel@vger.kernel.org Subject: Re: [PATCH net-next 3/3] virtchnl: fix fake 1-elem arrays for structures allocated as `nents` Message-ID: <202308040130.E48094967E@keescook> References: <20230728155207.10042-1-aleksander.lobakin@intel.com> <20230728155207.10042-4-aleksander.lobakin@intel.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20230728155207.10042-4-aleksander.lobakin@intel.com> X-Spam-Status: No, score=-2.1 required=5.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,DKIM_VALID_EF, RCVD_IN_DNSWL_BLOCKED,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED autolearn=unavailable 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 On Fri, Jul 28, 2023 at 05:52:07PM +0200, Alexander Lobakin wrote: > Finally, fix 3 structures which are allocated technically correctly, > i.e. the calculated size equals to the one that struct_size() would > return, except for sizeof(). For &virtchnl_vlan_filter_list_v2, use > the same approach when there are no enough space as taken previously > for &virtchnl_vlan_filter_list, i.e. let the maximum size be calculated > automatically instead of trying to guestimate it using maths. > > Signed-off-by: Alexander Lobakin Reviewed-by: Kees Cook -- Kees Cook