misc: tizen-inform-reboot: fix a potential NULL pointer dereference
authorJaehoon Chung <jh80.chung@samsung.com>
Fri, 16 Apr 2021 02:18:41 +0000 (11:18 +0900)
committerHoegeun Kwon <hoegeun.kwon@samsung.com>
Mon, 7 Feb 2022 08:01:41 +0000 (17:01 +0900)
Fix a potential NULL pointer dereference.
If there is no file or directory, it has to check whether it's error or
not.

Change-Id: Ia6e7280c1901ae772a5f890c312b7a741fbac0a1
Signed-off-by: Jaehoon Chung <jh80.chung@samsung.com>
drivers/misc/tizen-inform-reboot.c

index 386c1f6..02f82bb 100644 (file)
@@ -29,7 +29,7 @@ static int inform_reboot_notifier(struct notifier_block *nb,
        set_fs(KERNEL_DS);
 
        file = filp_open(filename, O_CREAT | O_WRONLY | O_TRUNC, 0644);
-       if (file) {
+       if (!IS_ERR(file)) {
                struct super_block *sb = file->f_path.dentry->d_sb;
 
                if (cmd) {