ntfs: only count successfully cleared runs when freeing clusters

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ntfs_cluster_free_from_rl_nolock() adds a run's length to nr_freed
whenever the error bookkeeping condition is false, which includes
cases where ntfs_bitmap_clear_run() actually failed - e.g. a second
run failing with the same errno as an earlier one, or any failure
after a non-ENOMEM error was already recorded. Since a failed
ntfs_bitmap_clear_run() rolls back its partial modifications, no
bits were cleared for that run, yet its length still inflates
vol->free_clusters, corrupting statfs output and the allocator's
free space gate.

Only count runs whose bitmap clear succeeded.

Fixes: 11ccc9107d ("ntfs: update runlist handling and cluster allocator")
Signed-off-by: Baolin Liu <liubaolin@kylinos.cn>
Reviewed-by: Hyunchul Lee <hyc.lee@gmail.com>
Signed-off-by: Namjae Jeon <linkinjeon@kernel.org>

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Baolin Liu 2026-08-21 13:32:37 +08:00 • committed by Namjae Jeon

parent cf06dcd572

commit be9e89ccb8

1 changed files with 3 additions and 3 deletions

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fs/ntfs/lcnalloc.c

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