[PATCH] erofs-utils: fix nid lookup for packed inode

[Gao Xiang]

If inode->nid is less than 0, it should be unallocated nid as well.

Reported-by: Jingbo Xu <jefflexu at linux.alibaba.com>
Fixes: 21d84349e79a ("erofs-utils: rearrange on-disk metadata")
Signed-off-by: Gao Xiang <hsiangkao at linux.alibaba.com>
---
 lib/inode.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/lib/inode.c b/lib/inode.c
index e2b02c4..54ea5fa 100644
--- a/lib/inode.c
+++ b/lib/inode.c
@@ -288,7 +288,7 @@ erofs_nid_t erofs_lookupnid(struct erofs_inode *inode)
 	struct erofs_buffer_head *const bh = inode->bh;
 	erofs_off_t off, meta_offset;
 
-	if (!bh || inode->nid)
+	if (!bh || (long long)inode->nid > 0)
 		return inode->nid;
 
 	erofs_mapbh(bh->block);
-- 
2.24.4