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Anusha Srivatsa
c004703be0
JIRA: https://issues.redhat.com/browse/RHEL-180329 commit 70090a32f56a4589e7e860e0f9a8fbe4417df0a1 Author: Muhammad Bilal <meatuni001@gmail.com> Date: Sat May 23 21:07:52 2026 +0000 accel/ethosu: reject NPU_OP_RESIZE commands from userspace commit ef911805d86a05363d3ec2fa9835a41def83bb7e upstream. NPU_OP_RESIZE is a U85-only command that the driver does not yet implement. The existing WARN_ON(1) placeholder fires unconditionally whenever userspace submits this command via DRM_IOCTL_ETHOSU_GEM_CREATE, causing unbounded kernel log spam. If panic_on_warn is set the kernel panics, giving any unprivileged user with access to the DRM device a trivial denial-of-service primitive. Replace the WARN_ON(1) with an explicit -EINVAL return so the ioctl rejects the command before it reaches hardware. Fixes: 5a5e9c0228e6 ("accel: Add Arm Ethos-U NPU driver") Cc: stable@vger.kernel.org Signed-off-by: Muhammad Bilal <meatuni001@gmail.com> Link: https://patch.msgid.link/20260523210840.92039-2-meatuni001@gmail.com Signed-off-by: Rob Herring (Arm) <robh@kernel.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> Signed-off-by: Anusha Srivatsa <asrivats@redhat.com>