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Input: adxl34x - fix leak and use after free

These are a couple smatch issues.  In the original code, if only one of
the allocation fails we leak the other variable so we should goto
out_free_mem.

Also there was a use after free if debugging was enabled and so I moved
the kfree() down a line.

Signed-off-by: Dan Carpenter <error27@gmail.com>
Signed-off-by: Dmitry Torokhov <dtor@mail.ru>
Dan Carpenter 15 년 전
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1개의 변경된 파일3개의 추가작업 그리고 4개의 파일을 삭제
  1. 3 4
      drivers/input/misc/adxl34x.c

+ 3 - 4
drivers/input/misc/adxl34x.c

@@ -432,11 +432,10 @@ void adxl34x_resume(struct adxl34x *ac)
 	if (ac->suspended && !ac->disabled && ac->opened)
 		__adxl34x_enable(ac);
 
-	ac->suspended= false;
+	ac->suspended = false;
 
 	mutex_unlock(&ac->mutex);
 }
-
 EXPORT_SYMBOL_GPL(adxl34x_resume);
 
 static ssize_t adxl34x_disable_show(struct device *dev,
@@ -709,7 +708,7 @@ struct adxl34x *adxl34x_probe(struct device *dev, int irq,
 	input_dev = input_allocate_device();
 	if (!ac || !input_dev) {
 		err = -ENOMEM;
-		goto err_out;
+		goto err_free_mem;
 	}
 
 	ac->fifo_delay = fifo_delay_default;
@@ -904,9 +903,9 @@ int adxl34x_remove(struct adxl34x *ac)
 	sysfs_remove_group(&ac->dev->kobj, &adxl34x_attr_group);
 	free_irq(ac->irq, ac);
 	input_unregister_device(ac->input);
+	dev_dbg(ac->dev, "unregistered accelerometer\n");
 	kfree(ac);
 
-	dev_dbg(ac->dev, "unregistered accelerometer\n");
 	return 0;
 }
 EXPORT_SYMBOL_GPL(adxl34x_remove);