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d54f87f09a
While meson_sm_read_efuse() doesn't overflow, the string is not zero terminated and env_set*() will buffer overflow and add random characters to environment. Acked-by: Viacheslav Bocharov <adeep@lexina.in> Link: https://lore.kernel.org/r/20240320-u-boot-fix-p200-serial-v2-1-972be646a301@linaro.org Signed-off-by: Neil Armstrong <neil.armstrong@linaro.org>
70 lines
1.6 KiB
C
70 lines
1.6 KiB
C
// SPDX-License-Identifier: GPL-2.0+
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/*
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* Copyright (C) 2021 Vyacheslav Bocharov
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* Author: Vyacheslav Bocharov <adeep@lexina.in>
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* Author: Neil Armstrong <narmstrong@baylibre.com>
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*
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*/
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#include <common.h>
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#include <dm.h>
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#include <adc.h>
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#include <env.h>
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#include <init.h>
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#include <net.h>
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#include <asm/io.h>
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#include <asm/arch/gx.h>
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#include <asm/arch/sm.h>
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#include <asm/arch/eth.h>
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#include <asm/arch/mem.h>
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#define EFUSE_SN_OFFSET 50
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#define EFUSE_SN_SIZE 32
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#define EFUSE_MAC_OFFSET 0
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#define EFUSE_MAC_SIZE 6
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#define EFUSE_USID_OFFSET 18
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#define EFUSE_USID_SIZE 32
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int misc_init_r(void)
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{
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u8 mac_addr[EFUSE_MAC_SIZE + 1];
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char serial[EFUSE_SN_SIZE + 1];
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char usid[EFUSE_USID_SIZE + 1];
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ssize_t len;
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unsigned int adcval;
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int ret;
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if (!eth_env_get_enetaddr("ethaddr", mac_addr)) {
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len = meson_sm_read_efuse(EFUSE_MAC_OFFSET,
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mac_addr, EFUSE_MAC_SIZE);
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mac_addr[len] = '\0';
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if (len == EFUSE_MAC_SIZE && is_valid_ethaddr(mac_addr))
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eth_env_set_enetaddr("ethaddr", mac_addr);
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else
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meson_generate_serial_ethaddr();
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}
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if (!env_get("serial")) {
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len = meson_sm_read_efuse(EFUSE_SN_OFFSET, serial,
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EFUSE_SN_SIZE);
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serial[len] = '\0';
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if (len == EFUSE_SN_SIZE)
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env_set("serial", serial);
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}
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if (!env_get("usid")) {
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len = meson_sm_read_efuse(EFUSE_USID_OFFSET, usid,
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EFUSE_USID_SIZE);
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usid[len] = '\0';
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if (len == EFUSE_USID_SIZE)
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env_set("usid", usid);
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}
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ret = adc_channel_single_shot("adc@8680", 0, &adcval);
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if (adcval < 3000)
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env_set("userbutton", "true");
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else
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env_set("userbutton", "false");
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return 0;
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}
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