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serial: smh: Check return value of strndup
strndup can fail. Check for it. Fixes: 4855b39be ("serial: smh: Implement puts for DM") Signed-off-by: Sean Anderson <sean.anderson@seco.com>
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@ -54,6 +54,9 @@ static ssize_t smh_serial_puts(struct udevice *dev, const char *s, size_t len)
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}
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buf = strndup(s, len);
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if (!buf)
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return -ENOMEM;
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smh_puts(buf);
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free(buf);
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return len;
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