[PATCH] serial: smh: Check return value of strndup

[Sean Anderson]

strndup can fail. Check for it.

Fixes: 4855b39be ("serial: smh: Implement puts for DM")
Signed-off-by: Sean Anderson <sean.ander...@seco.com>
---

 drivers/serial/serial_semihosting.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/drivers/serial/serial_semihosting.c 
b/drivers/serial/serial_semihosting.c
index 4328b3dac5..2561414e40 100644
--- a/drivers/serial/serial_semihosting.c
+++ b/drivers/serial/serial_semihosting.c
@@ -54,6 +54,9 @@ static ssize_t smh_serial_puts(struct udevice *dev, const 
char *s, size_t len)
                }
 
                buf = strndup(s, len);
+               if (!buf)
+                       return -ENOMEM;
+
                smh_puts(buf);
                free(buf);
                return len;
-- 
2.35.1.1320.gc452695387.dirty