From bce1a78423961fce676ac65540a31b6ffd179e6d Mon Sep 17 00:00:00 2001
From: Pan Bian <bianpan2016@163.com>
Date: Fri, 19 Apr 2019 07:39:00 +0000
Subject: [PATCH] Input: synaptics-rmi4 - fix possible double free
Git-commit: bce1a78423961fce676ac65540a31b6ffd179e6d
Patch-mainline: v5.1-rc7
References: bsc#1051510
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>
Acked-by: Takashi Iwai <tiwai@suse.de>
---
drivers/input/rmi4/rmi_driver.c | 6 +-----
1 file changed, 1 insertion(+), 5 deletions(-)
diff --git a/drivers/input/rmi4/rmi_driver.c b/drivers/input/rmi4/rmi_driver.c
index fc3ab93b7aea..7fb358f96195 100644
--- a/drivers/input/rmi4/rmi_driver.c
+++ b/drivers/input/rmi4/rmi_driver.c
@@ -860,7 +860,7 @@ 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;
@@ -870,10 +870,6 @@ 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;
}
void rmi_enable_irq(struct rmi_device *rmi_dev, bool clear_wake)
--
2.16.4