fbmem_init() ignores all errors, while fbmem_exit() does not
check if deallocating resources are valid.
Found by Linux Driver Verification project (linuxtesting.org).
Signed-off-by: Alexey Khoroshilov <khoroshilov@xxxxxxxxx>
---
drivers/video/fbdev/core/fbmem.c | 20 +++++++++++++++++---
1 file changed, 17 insertions(+), 3 deletions(-)
diff --git a/drivers/video/fbdev/core/fbmem.c b/drivers/video/fbdev/core/fbmem.c
index 4e73b6f6b1c0..76c1ad96fb37 100644
--- a/drivers/video/fbdev/core/fbmem.c
+++ b/drivers/video/fbdev/core/fbmem.c
@@ -1854,17 +1854,31 @@ EXPORT_SYMBOL(fb_set_suspend);
static int __init
fbmem_init(void)
{
- proc_create("fb", 0, NULL, &fb_proc_fops);
+ int ret;
+
+ if (!proc_create("fb", 0, NULL, &fb_proc_fops))
+ return -ENOMEM;
- if (register_chrdev(FB_MAJOR,"fb",&fb_fops))
+ ret = register_chrdev(FB_MAJOR, "fb", &fb_fops);
+ if (ret) {
printk("unable to get major %d for fb devs\n", FB_MAJOR);
+ goto err_chrdev;
+ }
fb_class = class_create(THIS_MODULE, "graphics");
if (IS_ERR(fb_class)) {
- printk(KERN_WARNING "Unable to create fb class; errno = %ld\n", PTR_ERR(fb_class));
+ ret = PTR_ERR(fb_class);
+ pr_warn("Unable to create fb class; errno = %d\n", ret);
fb_class = NULL;
+ goto err_class;
}
return 0;
+
+err_class:
+ unregister_chrdev(FB_MAJOR, "fb");
+err_chrdev:
+ remove_proc_entry("fb", NULL);
+ return ret;
}
#ifdef MODULE
--
1.9.1
--
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