From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-alma10-1.taild15c8.ts.net [100.103.45.18]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id BCFED31355B for ; Sat, 5 Sep 2026 00:43:51 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=100.103.45.18 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1788569032; cv=none; b=Tz17OL9oFA7gjlSemsMltHf3AiWoA7kGPGDCKWJCtz0WTuv9jp56q0fSI2eBGYP8UT2KVRiX+g5MARDru9eGDR8Yy5iZWGzdHR8BNjrPGvYf8oZMgdKnVZwPmsqLFab2EkEw0+naMZsKOffMnFx4nUd6LjEBqAJjNhqGZuEOKNo= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1788569032; c=relaxed/simple; bh=RWZ+owyApEzt7vJY7ohQi7nsnGYhTgDktSF+4xrHn5c=; h=From:Date:Subject:MIME-Version:Content-Type:Message-Id:References: In-Reply-To:To:Cc; b=DtR3SHAXyeWr36VkHAkuv5+uXNC3pvc4MttlRs98BGKu9d+HnN/HUYnfZd874yXeaM50RHvJrOeRIYxXeWWDovaKqUNROQDcDXrz41T7QD0AL+asYK7MtQOpxnISfdLTAIfLnOzhFxo7PGfWfMu/5nRs+xBN3LFL6SzSPGEqlX4= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=JtoiMqat; arc=none smtp.client-ip=100.103.45.18 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b="JtoiMqat" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 391441F00A3E; Sat, 5 Sep 2026 00:43:51 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=kernel.org; s=k20260515; t=1788569031; bh=HV+rmbMI0lHJ4R40iFUVjvOrvTR2qsfW7BSm738+Y1o=; h=From:Date:Subject:References:In-Reply-To:To:Cc; b=JtoiMqatW+HYv1FkEvbA/mdafRmPT70WDLRTfD7mTE1O7Q6BDTHUmH4CykEPsvHx6 dcazBOTdkiTvp9S0FMndGS8979+qLxXFBkbD4Ksk3UJLDFIcP4kxlniSjohanNmy6n OCQjsMICGk2+QPvNNGthRHFyTdyvzKIMDD7UBeYKgFxK1tTXbWfVAN7c12MfijGwXE 1ELKoXzvCJ6GFFsRgLwAUo6SxOoTs+ySUOtEBWbQJULXUxRgOlpqBoEaORfQIp5uz5 K3c0vHgBXZVAwuleyLZKexNG7Q0N/MsmbuAvgLXiHOxPD/SePr35PmzbZzfHax1Xq+ pX34nyu1LIyrQ== From: "Rob Herring (Arm)" Date: Fri, 04 Sep 2026 19:43:26 -0500 Subject: [PATCH v2 07/19] accel: ethosu: Factor buffer bounds checks Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: 7bit Message-Id: <20260904-ethosu-fixes-v2-7-3767738756a4@kernel.org> References: <20260904-ethosu-fixes-v2-0-3767738756a4@kernel.org> In-Reply-To: <20260904-ethosu-fixes-v2-0-3767738756a4@kernel.org> To: Tomeu Vizoso , Oded Gabbay , Frank Li , Thomas Zimmermann Cc: dri-devel@lists.freedesktop.org, linux-kernel@vger.kernel.org X-Mailer: b4 0.16-dev Move the repeated command-stream buffer range validation into a helper in preparation for validating all weight and scale streams. Assisted-by: LLM Signed-off-by: Rob Herring (Arm) --- v2: - Adjust due to previous patch --- drivers/accel/ethosu/ethosu_gem.c | 37 +++++++++++++++++++++++++------------ 1 file changed, 25 insertions(+), 12 deletions(-) diff --git a/drivers/accel/ethosu/ethosu_gem.c b/drivers/accel/ethosu/ethosu_gem.c index 8a44a5d89bce..0b1edf02d48e 100644 --- a/drivers/accel/ethosu/ethosu_gem.c +++ b/drivers/accel/ethosu/ethosu_gem.c @@ -423,6 +423,25 @@ static u64 feat_matrix_length(struct ethosu_device *edev, return addr; } +static int buffer_size(struct ethosu_validated_cmdstream_info *info, + struct cmd_state *st, struct buffer *buf, s8 region, + u16 region_cmd, u16 base_cmd, u16 length_cmd) +{ + u64 end; + + if (region < 0 || !cmd_state_reg_is_set(st, region_cmd) || + !cmd_state_reg_is_set(st, base_cmd) || + !cmd_state_reg_is_set(st, length_cmd)) + return -EINVAL; + + if (check_add_overflow(buf->base, (u64)buf->length, &end)) + return -EINVAL; + + info->region_size[region] = max(info->region_size[region], end); + + return 0; +} + static int calc_sizes(struct drm_device *ddev, struct ethosu_validated_cmdstream_info *info, u16 op, struct cmd_state *st, @@ -475,26 +494,20 @@ static int calc_sizes(struct drm_device *ddev, dev_dbg(ddev->dev, "op %d: W:%d:0x%llx-0x%llx\n", op, st->weight[0].region, st->weight[0].base, st->weight[0].base + st->weight[0].length - 1); - if (!cmd_state_reg_is_set(st, NPU_SET_WEIGHT_REGION) || - !cmd_state_reg_is_set(st, NPU_SET_WEIGHT_BASE) || - !cmd_state_reg_is_set(st, NPU_SET_WEIGHT_LENGTH)) + if (buffer_size(info, st, &st->weight[0], st->weight[0].region, + NPU_SET_WEIGHT_REGION, NPU_SET_WEIGHT_BASE, + NPU_SET_WEIGHT_LENGTH)) return -EINVAL; - info->region_size[st->weight[0].region] = - max(info->region_size[st->weight[0].region], - st->weight[0].base + st->weight[0].length); } if (scale) { dev_dbg(ddev->dev, "op %d: S:%d:0x%llx-0x%llx\n", op, st->scale[0].region, st->scale[0].base, st->scale[0].base + st->scale[0].length - 1); - if (!cmd_state_reg_is_set(st, NPU_SET_SCALE_REGION) || - !cmd_state_reg_is_set(st, NPU_SET_SCALE_BASE) || - !cmd_state_reg_is_set(st, NPU_SET_SCALE_LENGTH)) + if (buffer_size(info, st, &st->scale[0], st->scale[0].region, + NPU_SET_SCALE_REGION, NPU_SET_SCALE_BASE, + NPU_SET_SCALE_LENGTH)) return -EINVAL; - info->region_size[st->scale[0].region] = - max(info->region_size[st->scale[0].region], - st->scale[0].base + st->scale[0].length); } len = feat_matrix_length(edev, info, st, &st->ofm, FEAT_MATRIX_OFM, -- 2.53.0