[PATCH 1/1] riscv: add NULL check before calling strlen in the riscv cpu's get_desc()
Hanyuan Zhao
hanyuan-z at qq.com
Mon May 6 11:10:06 CEST 2024
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 at mails.tsinghua.edu.cn>
---
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 9b1950efe0..d39a943cb8 100644
--- a/drivers/cpu/riscv_cpu.c
+++ b/drivers/cpu/riscv_cpu.c
@@ -24,7 +24,7 @@ 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);
--
2.34.1
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