Merge "soc: qcom: Validate read and write index before calculating ptr" (e8d4ca02) · Commits · e / devices / android_kernel_sony_msm8998

drivers/soc/qcom/glink_smem_native_xprt.c

+7 −1

Original line number	Diff line number	Diff line
		/* Copyright (c) 2014-2018, The Linux Foundation. All rights reserved.
		/* Copyright (c) 2014-2019, The Linux Foundation. All rights reserved.
		*
		* This program is free software; you can redistribute it and/or modify
		* it under the terms of the GNU General Public License version 2 and
		@@ -447,6 +447,9 @@ static int fifo_read(struct edge_info einfo, void _data, int len)
		uint32_t fifo_size = einfo->rx_fifo_size;
		uint32_t n;

		if (read_index >= fifo_size \|\| write_index >= fifo_size)
		return 0;

		while (len) {
		ptr = einfo->rx_fifo + read_index;
		if (read_index <= write_index)
		@@ -490,6 +493,9 @@ static uint32_t fifo_write_body(struct edge_info einfo, const void _data,
		uint32_t fifo_size = einfo->tx_fifo_size;
		uint32_t n;

		if (read_index >= fifo_size \|\| *write_index >= fifo_size)
		return 0;

		while (len) {
		ptr = einfo->tx_fifo + *write_index;
		if (*write_index < read_index) {