On 30/07/2025 07:09, Yu Kuai wrote:
Hi,
在 2025/07/30 13:51, Arnaud Lecomte 写道:
#syz test
--- a/drivers/md/md.c
+++ b/drivers/md/md.c
@@ -5978,10 +5978,6 @@ struct mddev *md_alloc(dev_t dev, char *name)
disk->events |= DISK_EVENT_MEDIA_CHANGE;
mddev->gendisk = disk;
- error = add_disk(disk);
- if (error)
- goto out_put_disk;
-
kobject_init(&mddev->kobj, &md_ktype);
error = kobject_add(&mddev->kobj, &disk_to_dev(disk)->kobj,
"%s", "md");
This is wrong, you can't add mddev >kobj under the disk without
kobject_add for the disk kobj.
Will dive a bit more into that after work,
Thanks
Thanks,
Kuai
if (error) {
@@ -5999,6 +5995,9 @@ struct mddev *md_alloc(dev_t dev, char *name)
kobject_uevent(&mddev->kobj, KOBJ_ADD);
mddev->sysfs_state = sysfs_get_dirent_safe(mddev->kobj.sd,
"array_state");
mddev->sysfs_level = sysfs_get_dirent_safe(mddev->kobj.sd,
"level");
+ error = add_disk(disk);
+ if (error)
+ goto out_put_disk;
mutex_unlock(&disks_mutex);
return mddev;
