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-rw-r--r--fs/erofs/zmap.c4
1 files changed, 4 insertions, 0 deletions
diff --git a/fs/erofs/zmap.c b/fs/erofs/zmap.c
index 14ea47f954f5..6afcb054780d 100644
--- a/fs/erofs/zmap.c
+++ b/fs/erofs/zmap.c
@@ -597,6 +597,10 @@ static int z_erofs_map_blocks_ext(struct inode *inode,
if (la > map->m_la) {
r = mid;
+ if (la > lend) {
+ DBG_BUGON(1);
+ return -EFSCORRUPTED;
+ }
lend = la;
} else {
l = mid + 1;