misc: tizen-inform-reboot: fix a potential NULL pointer dereference

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>

diff --git a/drivers/misc/tizen-inform-reboot.c b/drivers/misc/tizen-inform-reboot.c
index 386c1f6..02f82bb 100644 (file)
--- a/drivers/misc/tizen-inform-reboot.c
+++ b/drivers/misc/tizen-inform-reboot.c
@@ -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) {