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-rw-r--r--fs/erofs/zmap.c3
1 files changed, 2 insertions, 1 deletions
diff --git a/fs/erofs/zmap.c b/fs/erofs/zmap.c
index 9fb98d85a3ce..7a6df35fdc91 100644
--- a/fs/erofs/zmap.c
+++ b/fs/erofs/zmap.c
@@ -369,7 +369,8 @@ static int compacted_load_cluster_from_disk(struct z_erofs_maprecorder *m,
if (compacted_4b_initial == 32 / 4)
compacted_4b_initial = 0;
- if (vi->z_advise & Z_EROFS_ADVISE_COMPACTED_2B)
+ if ((vi->z_advise & Z_EROFS_ADVISE_COMPACTED_2B) &&
+ compacted_4b_initial < totalidx)
compacted_2b = rounddown(totalidx - compacted_4b_initial, 16);
else
compacted_2b = 0;