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Sat, 23 May 2026 14:09:26 -0700 (PDT) Received: from codespaces-78f0a7.mimvmn1ww3huhhjmzljqefhnig.rx.internal.cloudapp.net ([4.240.39.195]) by smtp.gmail.com with ESMTPSA id d2e1a72fcca58-84164fc646bsm5406884b3a.46.2026.05.23.14.09.21 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Sat, 23 May 2026 14:09:25 -0700 (PDT) From: Muhammad Bilal To: robh@kernel.org Cc: tomeu@tomeuvizoso.net, ogabbay@kernel.org, tzimmermann@suse.de, Frank.Li@nxp.com, dri-devel@lists.freedesktop.org, linux-kernel@vger.kernel.org, stable@vger.kernel.org, Muhammad Bilal Subject: [PATCH 0/2] accel/ethosu: fix two command stream parser bugs Date: Sat, 23 May 2026 21:07:51 +0000 Message-ID: <20260523210840.92039-1-meatuni001@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: 8bit While investigating the IFM region index out-of-bounds fix already sent [1], two additional bugs were found in the same command stream parser function ethosu_gem_cmdstream_copy_and_validate(): Patch 1: NPU_OP_RESIZE unconditionally triggers WARN_ON(1), allowing any unprivileged user with DRM device access to spam the kernel log or panic the kernel if panic_on_warn is set. Patch 2: NPU_SET_SCALE1_LENGTH on U85 hardware assigns the user-supplied length to weight[1] instead of weight[2], mismatching its BASE handler and corrupting the software bounds-check state for both weight buffers. Both fixes apply cleanly on top of the IFM patch and target the same Fixes: tag since all three bugs originate in the same commit. [1] <20260523195159.55801-1-meatuni001@gmail.com> Muhammad Bilal (2): accel/ethosu: reject NPU_OP_RESIZE commands from userspace accel/ethosu: fix wrong weight index in NPU_SET_SCALE1_LENGTH on U85 drivers/accel/ethosu/ethosu_gem.c | 5 ++--- 1 file changed, 2 insertions(+), 3 deletions(-) -- 2.53.0