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Fri, 07 Mar 2025 09:58:00 -0800 (PST) Received: from localhost.localdomain ([5.133.47.210]) by smtp.gmail.com with ESMTPSA id 4fb4d7f45d1cf-5e5c745c5afsm2803622a12.18.2025.03.07.09.57.58 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Fri, 07 Mar 2025 09:57:59 -0800 (PST) From: srinivas.kandagatla@linaro.org To: gregkh@linuxfoundation.org Cc: linux-kernel@vger.kernel.org, Dmitry Baryshkov , Srinivas Kandagatla Subject: [PATCH 09/14] nvmem: core: verify cell's raw_len Date: Fri, 7 Mar 2025 17:57:19 +0000 Message-Id: <20250307175724.15068-10-srinivas.kandagatla@linaro.org> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20250307175724.15068-1-srinivas.kandagatla@linaro.org> References: <20250307175724.15068-1-srinivas.kandagatla@linaro.org> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-Developer-Signature: v=1; a=openpgp-sha256; l=941; i=srinivas.kandagatla@linaro.org; h=from:subject; bh=rsBDmOxFNJXqrf7DDy8vxhQi2Qrki9Mvt8Gf6fd2xe4=; b=owEBbQGS/pANAwAKAXqh/VnHNFU3AcsmYgBnyzN9aTfq5YGsImCpSTTBQ1BXjIroAQ8oBZ7Gg hKNtvEqyWeJATMEAAEKAB0WIQQi509axvzi9vce3Y16of1ZxzRVNwUCZ8szfQAKCRB6of1ZxzRV N+RtCACJjXfm0UdHhPPxsrVFabafGh64fRpPSKDYrau/q0f0z2zeaagDD9fUgOTQiR3cFZMIjKq fFjaqvu/AE1VLAxpIZWB2CJeQ77MC5f8F4dVsM5IV1Q+lTnPjyPNIgu2Qhez8HH6joZRxbtOmut nTA1pVQAFQ+rJNT6WHeryIIel8hPtxTxUNx2qzPl5UmnrIIsnQlivXW7/7oAtFCAWYwb/BqFXPV WAifHq14LHQQaIX2Mk3O+l+z+Njg7o9N4QBC+AnfhQn8CSAVRxdtsm86k5YKTKnVUQj8uo8iNdL pfY5jMNU4p0tJA92ix0u3X5eD+E5t5J1aWAXZzfuGQPKVvQm X-Developer-Key: i=srinivas.kandagatla@linaro.org; a=openpgp; fpr=ED6472765AB36EC43B3EF97AD77E3FC0562560D6 Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset="utf-8" From: Dmitry Baryshkov Check that the NVMEM cell's raw_len is a aligned to word_size. Otherwise Otherwise drivers might face incomplete read while accessing the last part of the NVMEM cell. Signed-off-by: Dmitry Baryshkov Signed-off-by: Srinivas Kandagatla --- drivers/nvmem/core.c | 8 ++++++++ 1 file changed, 8 insertions(+) diff --git a/drivers/nvmem/core.c b/drivers/nvmem/core.c index 7872903c08a1..ad9b716e8123 100644 --- a/drivers/nvmem/core.c +++ b/drivers/nvmem/core.c @@ -605,6 +605,14 @@ static int nvmem_cell_info_to_nvmem_cell_entry_nodup(s= truct nvmem_device *nvmem, return -EINVAL; } =20 + if (!IS_ALIGNED(cell->raw_len, nvmem->word_size)) { + dev_err(&nvmem->dev, + "cell %s raw len %zd unaligned to nvmem word size %d\n", + cell->name ?: "", cell->raw_len, + nvmem->word_size); + return -EINVAL; + } + return 0; } =20 --=20 2.25.1