Merge "msm: kgsl: Prevent wrap around during user address mapping"

// SPDX-License-Identifier: GPL-2.0-only

/*

 * Copyright (c) 2011-2021, The Linux Foundation. All rights reserved.

 * Copyright (c) 2022 Qualcomm Innovation Center, Inc. All rights reserved.

 * Copyright (c) 2022-2023, Qualcomm Innovation Center, Inc. All rights reserved.

 */

#include <linux/compat.h>

static bool iommu_addr_in_svm_ranges(struct kgsl_iommu_pt *pt,

	u64 gpuaddr, u64 size)

{

	u64 end = gpuaddr + size;

	/* Make sure size is not zero and we don't wrap around */

	if (end <= gpuaddr)

		return false;

	if ((gpuaddr >= pt->compat_va_start && gpuaddr < pt->compat_va_end) &&

		((gpuaddr + size) > pt->compat_va_start &&

			(gpuaddr + size) <= pt->compat_va_end))

		(end > pt->compat_va_start && end <= pt->compat_va_end))

		return true;

	if ((gpuaddr >= pt->svm_start && gpuaddr < pt->svm_end) &&

		((gpuaddr + size) > pt->svm_start &&

			(gpuaddr + size) <= pt->svm_end))

		(end > pt->svm_start && end <= pt->svm_end))

		return true;

	return false;