In the Linux kernel, the following vulnerability has been resolved:
media: hi846: fix usage of pmruntimegetifin_use()
pmruntimegetifin_use() does not only return nonzero values when the device is in use, it can return a negative errno too.
And especially during resuming from system suspend, when runtime pm is not yet up again, -EAGAIN is being returned, so the subsequent pmruntimeput() call results in a refcount underflow.
Fix system-resume by handling -EAGAIN of pmruntimegetifin_use().