From 9578e74571596eb8f1a74b46cbb2ddf6ed5dee39 Mon Sep 17 00:00:00 2001 From: Hanyuan Zhao <hanyuan-z@qq.com> Date: Mon, 6 May 2024 17:10:06 +0800 Subject: [PATCH] riscv: add NULL check before calling strlen in the riscv cpu's get_desc() Without the NULL check, if the devicetree that u-boot loads does not have a compatible property then a store access fault will be raised and force the machine to reset, due to the NULL pointer we passed to strlen. This commit adds this check and will return -ENOSPC to indicate the get_desc failed. Signed-off-by: Hanyuan Zhao <zhaohy22@mails.tsinghua.edu.cn> Reviewed-by: Leo Yu-Chi Liang <ycliang@andestech.com> --- drivers/cpu/riscv_cpu.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/cpu/riscv_cpu.c b/drivers/cpu/riscv_cpu.c index 4f2958a23c..4fff4658b5 100644 --- a/drivers/cpu/riscv_cpu.c +++ b/drivers/cpu/riscv_cpu.c @@ -23,7 +23,7 @@ static int riscv_cpu_get_desc(const struct udevice *dev, char *buf, int size) const char *cpu; cpu = dev_read_string(dev, "compatible"); - if (size < (strlen(cpu) + 1)) + if (!cpu || size < (strlen(cpu) + 1)) return -ENOSPC; strcpy(buf, cpu); -- 2.39.5