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Wed, 28 May 2025 09:15:41 -0700 (PDT) Date: Wed, 28 May 2025 19:15:36 +0300 From: Dan Carpenter To: Alison Schofield Cc: Shiju Jose , Davidlohr Bueso , Jonathan Cameron , Dave Jiang , Vishal Verma , Ira Weiny , Dan Williams , Li Ming , Fan Ni , linux-cxl@vger.kernel.org, linux-kernel@vger.kernel.org, kernel-janitors@vger.kernel.org Subject: Re: [PATCH next] cxl: fix return value in cxlctl_validate_set_features() Message-ID: References: Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: On Wed, May 28, 2025 at 08:22:35AM -0700, Alison Schofield wrote: > On Wed, May 28, 2025 at 11:11:41AM +0300, Dan Carpenter wrote: > > The cxlctl_validate_set_features() function is type bool. It's supposed > > to return true for valid requests and false for invalid. However, this > > error path returns ERR_PTR(-EINVAL) which is true when it was intended to > > return false. > > Shiju - Can you trace this one through and add the impact statement? > Wondering if this is going to fail gracefully, or badly, further > down this path? > Sorry, I would normally analyse this a bit more myself, but it's only in linux-next so I assumed no one was using it yet. It ends up being fine. cxlctl_set_feature() has a check for: if (rpc_in->op_size <= sizeof(feat_in->hdr)) at the start and sizeof(feat_in->hdr) is larger than sizeof(uuid_t). regards, dan carpenter