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Wed, 16 Sep 2026 05:04:33 -0700 (PDT) Received: from localhost.localdomain ([78.40.184.2]) by smtp.gmail.com with ESMTPSA id 38308e7fff4ca-3a5dafee366sm5974541fa.42.2026.09.16.05.04.32 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Wed, 16 Sep 2026 05:04:32 -0700 (PDT) From: Roman Demidov To: stable@vger.kernel.org, Greg Kroah-Hartman Cc: Roman Demidov , Manivannan Sadhasivam , Vinod Koul , Gustavo Pimentel , dmaengine@vger.kernel.org, linux-kernel@vger.kernel.org, lvc-project@linuxtesting.org, Koichiro Den , Frank Li Subject: [PATCH 5.15] dmaengine: dw-edma-pcie: Reject devices without driver data Date: Wed, 16 Sep 2026 15:04:06 +0300 Message-ID: <20260916120408.145211-1-roman.demidov.nn@gmail.com> X-Mailer: git-send-email 2.53.0 Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset="utf-8" From: Koichiro Den commit 11d7cfe0c119691b2dafbb699bbca90258c678aa upstream. dw_edma_pcie_probe() treats the PCI device ID driver_data as the template for the controller layout and copies it unconditionally. A device bound dynamically via sysfs can match the driver without that data, which leads to a NULL pointer dereference. Reject such matches before enabling the device. Fixes: 41aaff2a2ac0 ("dmaengine: Add Synopsys eDMA IP PCIe glue-logic") Signed-off-by: Koichiro Den Reviewed-by: Frank Li Link: https://patch.msgid.link/20260521142153.2957432-3-den@valinux.co.jp Signed-off-by: Vinod Koul Signed-off-by: Roman Demidov --- Backport fix for CVE-2026-72147 drivers/dma/dw-edma/dw-edma-pcie.c | 3 +++ 1 file changed, 3 insertions(+) diff --git a/drivers/dma/dw-edma/dw-edma-pcie.c b/drivers/dma/dw-edma/dw-ed= ma-pcie.c index 2c1c5fa4e9f2..84d5a1d1b2a8 100644 --- a/drivers/dma/dw-edma/dw-edma-pcie.c +++ b/drivers/dma/dw-edma/dw-edma-pcie.c @@ -151,6 +151,9 @@ static int dw_edma_pcie_probe(struct pci_dev *pdev, int err, nr_irqs; int i, mask; =20 + if (!pdata) + return -ENODEV; + /* Enable PCI device */ err =3D pcim_enable_device(pdev); if (err) { --=20 2.53.0