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[34.127.51.67]) by smtp.gmail.com with ESMTPSA id 98e67ed59e1d1-3a0972efa0bsm3184726a91.8.2026.09.24.00.30.13 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Thu, 24 Sep 2026 00:30:13 -0700 (PDT) From: Hui Peng To: jani.nikula@linux.intel.com, tzimmermann@suse.de, maarten.lankhorst@linux.intel.com, mripard@kernel.org, airlied@gmail.com, simona@ffwll.ch Cc: dri-devel@lists.freedesktop.org, linux-kernel@vger.kernel.org, stable@vger.kernel.org, Hui Peng Subject: [PATCH v3 0/2] drm/udl: fix EDID short transfer check and probe USB cleanup Date: Thu, 24 Sep 2026 07:30:09 +0000 Message-ID: <20260924073012.2742968-1-benquike@gmail.com> X-Mailer: git-send-email 2.56.0.rc1.310.g51773c2048-goog In-Reply-To: <20260924064434.2541959-1-benquike@gmail.com> References: <20260919223511.3889061-1-benquike@gmail.com> <20260924064434.2541959-1-benquike@gmail.com> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Mailman-Approved-At: Fri, 25 Sep 2026 07:30:44 +0000 X-BeenThere: dri-devel@lists.freedesktop.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Direct Rendering Infrastructure - Development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: dri-devel-bounces@lists.freedesktop.org Sender: "dri-devel" This series fixes two error-handling issues in the udl DRM driver: 1. Reject short USB control transfers (ret < 2) in udl_read_edid_block() with -EIO so uninitialized or stale bytes from read_buff[1] are not copied into the EDID buffer. 2. Call udl_drop_usb(udl) when drm_dev_register() fails in udl_usb_probe() so the allocated URB list and DMA buffers are released. Changes in v3: - Change (ret != 2) to (ret < 2) in udl_read_edid_block(), as requested by Thomas Zimmermann. - Add Reviewed-by tag from Thomas Zimmermann to both patches. Changes in v2: - Split into two separate patches, as requested by Jani Nikula. Hui Peng (2): drm/udl: reject short USB control transfers in udl_read_edid_block() drm/udl: clean up USB resources if drm_dev_register() fails drivers/gpu/drm/udl/udl_drv.c | 4 +++- drivers/gpu/drm/udl/udl_edid.c | 2 +- 2 files changed, 4 insertions(+), 2 deletions(-)