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base: dd: fix error return code of driver_sysfs_add() 

When device_create_file() fails and returns a non-zero value,
no error return code of driver_sysfs_add() is assigned.
To fix this bug, ret is assigned with the return value of
device_create_file(), and then ret is checked.

Reported-by: TOTE Robot <oslab@tsinghua.edu.cn>
Signed-off-by: Jia-Ju Bai <baijiaju1990@gmail.com>
Link: https://lore.kernel.org/r/20210324023405.12465-1-baijiaju1990@gmail.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Jia-Ju Bai 2021-03-23 19:34:05 -07:00 committed by Greg Kroah-Hartman
parent e611f8cd87
commit d225ef6fda
1 changed files with 5 additions and 2 deletions
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7
drivers/base/dd.c
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@ -415,8 +415,11 @@ static int driver_sysfs_add(struct device *dev)
if (ret)
goto rm_dev;
if (!IS_ENABLED(CONFIG_DEV_COREDUMP) || !dev->driver->coredump ||
!device_create_file(dev, &dev_attr_coredump))
if (!IS_ENABLED(CONFIG_DEV_COREDUMP) || !dev->driver->coredump)
return 0;
ret = device_create_file(dev, &dev_attr_coredump);
if (!ret)
return 0;
sysfs_remove_link(&dev->kobj, "driver");