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Input: synaptics-rmi4 - fix possible double free

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[ Upstream commit bce1a78423961fce676ac65540a31b6ffd179e6d ]

The RMI4 function structure has been released in rmi_register_function
if error occurs. However, it will be released again in the function
rmi_create_function, which may result in a double-free bug.

Signed-off-by: Pan Bian <bianpan2016@163.com>
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
This commit is contained in:
Pan Bian 2019-04-19 07:39:00 +00:00 committed by Greg Kroah-Hartman
parent 737b6bcd08
commit ecdb33c0ae
1 changed files with 1 additions and 5 deletions
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6
drivers/input/rmi4/rmi_driver.c
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@ -772,7 +772,7 @@ static int rmi_create_function(struct rmi_device *rmi_dev,
error = rmi_register_function(fn);
if (error)
goto err_put_fn;
return error;
if (pdt->function_number == 0x01)
data->f01_container = fn;
@ -780,10 +780,6 @@ static int rmi_create_function(struct rmi_device *rmi_dev,
list_add_tail(&fn->node, &data->function_list);
return RMI_SCAN_CONTINUE;
err_put_fn:
put_device(&fn->dev);
return error;
}
int rmi_driver_suspend(struct rmi_device *rmi_dev)