tty: serial: sh-sci: set error code when kasprintf fails
When the call to kasprintf() returns a NULL pointer, function sci_request_irq() frees the preallocated memory and returns 0 is returned. Because 0 means no error, the caller of sci_request_irq() will keep going, and the freed memory may be used or freed again. To avoid the above issue, this patch assigns "-ENOMEM" to the return variable ret. Bugzilla: https://bugzilla.kernel.org/show_bug.cgi?id=188691 Signed-off-by: Pan Bian <bianpan2016@163.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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@ -1743,8 +1743,10 @@ static int sci_request_irq(struct sci_port *port)
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desc = sci_irq_desc + i;
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port->irqstr[j] = kasprintf(GFP_KERNEL, "%s:%s",
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dev_name(up->dev), desc->desc);
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if (!port->irqstr[j])
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if (!port->irqstr[j]) {
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ret = -ENOMEM;
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goto out_nomem;
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}
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ret = request_irq(irq, desc->handler, up->irqflags,
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port->irqstr[j], port);
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