Re: [PATCH] f2fs: fix uninitialized kobject put in f2fs_init_sysfs()

[Chao Yu]

On 4/10/2026 8:47 PM, Guangshuo Li wrote:
> In f2fs_init_sysfs(), all failure paths after kset_register() jump to
> put_kobject, which unconditionally releases both f2fs_tune and
> f2fs_feat.
>
> If kobject_init_and_add(&f2fs_feat, ...) fails, f2fs_tune has not been
> initialized yet, so calling kobject_put(&f2fs_tune) is invalid.
>
> Fix this by splitting the unwind path so each error path only releases
> objects that were successfully initialized.
>
> Fixes: a907f3a68ee26ba4 ("f2fs: add a sysfs entry to reclaim POSIX_FADV_NOREUSE pages")
> Cc: stable@xxxxxxxxxxxxxxx
> Signed-off-by: Guangshuo Li <lgs201920130244@xxxxxxxxx>

Reviewed-by: Chao Yu <chao@xxxxxxxxxx>

Thanks,