CVE-2024-56582 btrfs: fix use-after-free in btrfs_encoded_read_endio()

In the Linux kernel, the following vulnerability has been resolved: btrfs: fix use-after-free in btrfsencodedreadendio Shinichiro reported the following use-after free that sometimes is happening in our CI system when running fstests' btrfs/284 on a TCMU runner device: BUG: KASAN:...