Commit e6be18f6 authored by Dan Carpenter's avatar Dan Carpenter Committed by Wolfram Sang

i2c: dev: use after free in detach

The call to put_i2c_dev() frees "i2c_dev" so there is a use after
free when we call cdev_del(&i2c_dev->cdev).

Fixes: d6760b14 ('i2c: dev: switch from register_chrdev to cdev API')
Signed-off-by: default avatarDan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: default avatarWolfram Sang <wsa@the-dreams.de>
parent ed2608fa
......@@ -592,9 +592,9 @@ static int i2cdev_detach_adapter(struct device *dev, void *dummy)
if (!i2c_dev) /* attach_adapter must have failed */
return 0;
cdev_del(&i2c_dev->cdev);
put_i2c_dev(i2c_dev);
device_destroy(i2c_dev_class, MKDEV(I2C_MAJOR, adap->nr));
cdev_del(&i2c_dev->cdev);
pr_debug("i2c-dev: adapter [%s] unregistered\n", adap->name);
return 0;
......
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