* [PATCH v2] base: dd: fix error return code of driver_sysfs_add()
@ 2021-03-24 2:34 Jia-Ju Bai
0 siblings, 0 replies; only message in thread
From: Jia-Ju Bai @ 2021-03-24 2:34 UTC (permalink / raw)
To: gregkh, rafael; +Cc: linux-kernel, Jia-Ju Bai
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>
---
v2:
* Fix a redundant whitespace.
Thank Greg for good advice.
---
drivers/base/dd.c | 7 +++++--
1 file changed, 5 insertions(+), 2 deletions(-)
diff --git a/drivers/base/dd.c b/drivers/base/dd.c
index 9179825ff646..704ae8a90a00 100644
--- a/drivers/base/dd.c
+++ b/drivers/base/dd.c
@@ -413,8 +413,11 @@ 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");
--
2.17.1
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2021-03-24 2:34 [PATCH v2] base: dd: fix error return code of driver_sysfs_add() Jia-Ju Bai
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