From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mail-pf1-f180.google.com (mail-pf1-f180.google.com [209.85.210.180]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 65A2A304972 for ; Sat, 23 May 2026 21:09:32 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.210.180 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1779570573; cv=none; b=U7IS3qqygkoj0iEp5rdqQDKk4/v8uWHpFfei+rsTHT4/ObugGDbO06xKZpPR7hEloXJ4vOntq4JEeOXA3M/hVCzTHd/zmFBM7+OuWMaHGU5Xo4kelYj1KgNoPPMbXGxBCg7rJZf54+p6LhqjjOsN0uwCDGSX8oego9slR2Cq1PE= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1779570573; c=relaxed/simple; bh=+lRJD2b0ZjqK9badvBf2tzZfwwSC1/C8unjjkSYiDBQ=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=WGlIcv8yDkUJOu4hsj6eVZFOJsmaC+gS/pgY3pQ3OwXnWSeXw4Wrp+8wCzEu1xTA9KnoR4p6tsrf8Thtg8YDGy40kfZcCQHlFQ7eBtnK0YURsSN3UhLMm7FrHO8isw+C+mbbieiBcXcxE1yI9Lg+QWiKwSOMcdY7BAOQmY/JJqI= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=gmail.com; spf=pass smtp.mailfrom=gmail.com; dkim=pass (2048-bit key) header.d=gmail.com header.i=@gmail.com header.b=f+EyJyQJ; arc=none smtp.client-ip=209.85.210.180 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=gmail.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=gmail.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=gmail.com header.i=@gmail.com header.b="f+EyJyQJ" Received: by mail-pf1-f180.google.com with SMTP id d2e1a72fcca58-835b78c3797so3714343b3a.2 for ; Sat, 23 May 2026 14:09:32 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20251104; t=1779570571; x=1780175371; darn=vger.kernel.org; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:from:to:cc:subject:date :message-id:reply-to; bh=Lm8UJ4hOarUlviQr2levKNdmrXnb21bQJ59ovlralbM=; b=f+EyJyQJdl0ZTXVsdg31I5sGl8ZoIclMJIBzV1wntWRZ87wAHg7wSy1GbEMl0AXRkq 1jejAYx7axBYLo1dkPWTo+ofYn+iNnCHXFbtDHCTbq5esHlxS9btYrSmsCnVjVJI3pTB 5XHN1249BUcsj73JMcWV9BTXc0EU5CM4BA6UefpgpdEqXptOafEuMetNEZgZo5RRtap1 QEJwmZV4I/U8TkONt+P/z9Z53QfbYkjPY8eCVqoO2aXLht+bZq/FEdX3HBC7uYveZPOV JdAQH6U36mqKmmLIaf/dEWgfFDfR2wzM5B/fYu49kyFzrIbt6DgFzae5lzZwD8M7p/0P JenQ== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20251104; t=1779570571; x=1780175371; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:x-gm-gg:x-gm-message-state:from :to:cc:subject:date:message-id:reply-to; bh=Lm8UJ4hOarUlviQr2levKNdmrXnb21bQJ59ovlralbM=; b=qWeo8vHjD6WoFZl8m828y61QMoJg0f+7esDC6+S53Mmqdhs78d5yQd4qG2RAbPutaA 2LVCiakbxL6ghOeUVkRvSga9dU5P31iKe0qBnXUDRWWCMpee3ZoIRJdf8sxWOfCh4BdI LcwLGQLUYwW+DMEa747RsCqJtQ+4rmwNX9nt5xdh/PtFZyy9HvU7J06T1mXvuM5KWyGU S1gps8MjUYHMc1tOQIQPFFlgTxu8haBb83GUI8mP5DOX+U8cBbA9zIB7HwUhYMDLp/dM LFp+4AeHfHc4nE/bmaw34tVyHHPXIrwDX3L75evHDcvUpZGaUe6QZvkxDHIaHW+3O/zj smFg== X-Forwarded-Encrypted: i=1; AFNElJ+UywbA3tcjnIbzKbnhQuWr6fK6INGEnUuGzpLQ+2VUBCyHqL/xTgf5tP86pUCFDGmsaev1BkU=@vger.kernel.org X-Gm-Message-State: AOJu0YxQeDe9TX3wplu1efptKhEK40vYwBD6Ol0kE8WjNHAfQBH0+z3H syv6E4KiAy50/z1SRBmuPZqfAOblXaxoWXbc1OwQFRKtVt9mrg6aCTLH X-Gm-Gg: Acq92OHTH5KQo7TT3hz/V9ENxsJYBFX4hty+UwroiFIbJveJ8mkiqSBuRU0E4pr7g41 FqTVecErXiC14mvaladjUt+41AzyYFXF3/GA4CHZe9jXnzAzo2jY4Tp1XVHNRNmzgfgebvNHEY2 Kjo49sOePT6450Rc63SN5uCiUSkswPCNKMdJ3uWIPYlEMuhJpPn9UittoaC4GH15evAH1YeBpeb 3lD140+ATMnLpJEWOSxUGcxcXESmb/Pe63sTlhJ2IEE/Uw9WnWmIpaZs36h/lsBfFSiwe+5vnsB tzop0UMWGupAfi7WKhfBi+GcjGxJCS8uRjHdEsCDTg9vAvKIaunONcln2wUVdFSCnqDIEeuVATc artDNhbi74wzogZcWDzNgcubgl6pBKXs84lOVFpK88T3s95MIAxUtLpCzaeeWgmdP75ac6cCcSX mex3SBT233DsuPSCEsiYvpzYj6MckDB/qc4vjauPqILQUHSSwtmHKredUed9eIP8K9FeqD7meet sP3dyrRYXm17EuPZ4N04d3QL5BQfdPvaJiw5UQ2y6gtAU/SpOWrY6EGEKF9Re56UBGb98OYUkH6 9RDfFIAEWoo= X-Received: by 2002:a05:6a00:2d90:b0:82c:eb46:acb9 with SMTP id d2e1a72fcca58-8415f308ba8mr8634533b3a.24.1779570571492; Sat, 23 May 2026 14:09:31 -0700 (PDT) Received: from codespaces-78f0a7.mimvmn1ww3huhhjmzljqefhnig.rx.internal.cloudapp.net ([4.240.39.195]) by smtp.gmail.com with ESMTPSA id d2e1a72fcca58-84164fc646bsm5406884b3a.46.2026.05.23.14.09.27 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Sat, 23 May 2026 14:09:29 -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 1/2] accel/ethosu: reject NPU_OP_RESIZE commands from userspace Date: Sat, 23 May 2026 21:07:52 +0000 Message-ID: <20260523210840.92039-2-meatuni001@gmail.com> X-Mailer: git-send-email 2.53.0 In-Reply-To: <20260523210840.92039-1-meatuni001@gmail.com> References: <20260523210840.92039-1-meatuni001@gmail.com> Precedence: bulk X-Mailing-List: stable@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit 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 --- drivers/accel/ethosu/ethosu_gem.c | 3 +-- 1 file changed, 1 insertion(+), 2 deletions(-) diff --git a/drivers/accel/ethosu/ethosu_gem.c b/drivers/accel/ethosu/ethosu_gem.c index 80d4bc21c28f..043541407a8f 100644 --- a/drivers/accel/ethosu/ethosu_gem.c +++ b/drivers/accel/ethosu/ethosu_gem.c @@ -433,8 +433,7 @@ static int ethosu_gem_cmdstream_copy_and_validate(struct drm_device *ddev, return ret; break; case NPU_OP_RESIZE: // U85 only - WARN_ON(1); // TODO - break; + return -EINVAL; case NPU_SET_KERNEL_WIDTH_M1: st.ifm.width = param; break; -- 2.53.0