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[81.108.45.148]) by smtp.gmail.com with ESMTPSA id 5b1f17b1804b1-488d5d703c1sm9427005e9.3.2026.04.09.19.00.24 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Thu, 09 Apr 2026 19:00:25 -0700 (PDT) From: Prathamesh Deshpande To: cjubran@nvidia.com Cc: leon@kernel.org, linux-kernel@vger.kernel.org, linux-rdma@vger.kernel.org, mbloch@nvidia.com, netdev@vger.kernel.org, prathameshdeshpande7@gmail.com, richardcochran@gmail.com, saeedm@nvidia.com, tariqt@nvidia.com Subject: Re: [PATCH v2] net/mlx5: Fix OOB access and stack information leak in Date: Fri, 10 Apr 2026 03:00:25 +0100 Message-ID: <20260410020025.7386-1-prathameshdeshpande7@gmail.com> X-Mailer: git-send-email 2.43.0 In-Reply-To: <3a238d0c-4ec1-432d-995a-19d7db3e310e@nvidia.com> References: <3a238d0c-4ec1-432d-995a-19d7db3e310e@nvidia.com> Precedence: bulk X-Mailing-List: netdev@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit On Thu, Apr 9, 2026 at 17:16 +0300, Carolina Jubran wrote: > pin is defined as u8 in struct mlx5_eqe_pps, so pin < 0 is dead code. > > As for the upper bound: in order to receive a PPS event on a pin, the > user must first configure it via mlx5_ptp_enable, which already > validates the index (rq->extts.index >= clock->ptp_info.n_pins returns > -EINVAL) and since the mtpps register only defines capabilities for 8 > pins, so n_pins cannot exceed MAX_PIN_NUM. > > Maybe wrap it with WARN_ON_ONCE instead of silently returning, so if > future hardware adds support for more pins we would notice rather than > silently dropping events. Hi Carolina, Thanks for the feedback. I've removed the redundant pin < 0 check and implemented the WARN_ON_ONCE for the upper bound as suggested. I just submitted a v3 as a fresh thread with these changes and a fix for the union corruption bug. Thanks, Prathamesh