CVE-2026-98082

In the Linux kernel, the following vulnerability has been resolved:

btrfs: fix the possible bioc_list memory leak during error

There are two possible ways to leak bioc memory on

btrfs_ordered_extent::bioc_list:

- An error occurred for btrfs_insert_one_raid_extent()

Then the function btrfs_insert_raid_extent() immediately return

without freeing any bioc in the bioc_list.

- An ordered extent hit an IO error

In that case the ordered extent will have BTRFS_ORDERED_IOERR set, and

skip the call on btrfs_insert_raid_extent() completely.

Fix the problem by:

- Introduce a new helper, btrfs_cleanup_ordered_bioc_list()

Which will remove all bioc from the bioc_list, and release the bioc.

- Call the above helper for btrfs_insert_raid_extent()

So that the cleanup helper is always called no matter what.

- Call the above helper for btrfs_finish_one_ordered()

This is called just before the final release on the ordered extent.

This was reported by Sashiko when reviewing another patch.