[Bug 72181] ext4_mb_generate_buddy:free block calculation seems to overflow

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https://bugzilla.kernel.org/show_bug.cgi?id=72181

--- Comment #3 from WeiZhang <zweiustc@xxxxxxxxx> ---
(In reply to WeiZhang from comment #1)
> usually, we just get a wrong number of "free" from bitmap while bitmap is
> corrupted. but it should not larger than "max = EXT4_CLUSTERS_PER_GROUP(sb)"
> right?

sorry, "EXT4-fs error (device sdc1): ext4_mb_generate_buddy:727: group
313828953 clusters in bitmap, 28952 in gd   " group 313828953 clusters = group
3138 28953 clusters". I make a mistake here..

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