btrfs: qgroup: fix a wrong length calculation in qgroup_free_reserved_data()

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In that function, we round down the start position and round up the
ending position.

But during the calculation of @len, we use "round_up(start + len,
sectorsize)", which is the rounded up end position, not the rounded up
length.

Which results a much larger length, and later we are still using
"start + len", which is completely incorrect.

Fix it by declaring a local @aligned_start and @aligned_len and use them
instead.

Fixes: bc42bda223 ("btrfs: qgroup: Fix qgroup reserved space underflow by only freeing reserved ranges")
Reviewed-by: Filipe Manana <fdmanana@suse.com>
Signed-off-by: Qu Wenruo <wqu@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>

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Qu Wenruo 2026-07-28 12:09:26 +09:30 • committed by David Sterba

parent e0e6df7294

commit 9102b17951

1 changed files with 11 additions and 7 deletions

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fs/btrfs/qgroup.c

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