[PATCH v2] fsck.f2fs: check nid range before use to avoid segmentation fault

[Yunlong Song]

Signed-off-by: Yunlong Song <yunlong.song@xxxxxxxxxx>
---
 fsck/fsck.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/fsck/fsck.c b/fsck/fsck.c
index 11b8b0b..faf0663 100644
--- a/fsck/fsck.c
+++ b/fsck/fsck.c
@@ -740,7 +740,7 @@ void fsck_chk_inode_blk(struct f2fs_sb_info *sbi, u32 nid,
 	for (idx = 0; idx < 5; idx++) {
 		u32 nid = le32_to_cpu(node_blk->i.i_nid[idx]);
 
-		if (nid != 0) {
+		if (nid != 0 && IS_VALID_NID(sbi, nid)) {
 			struct node_info ni;
 
 			get_node_info(sbi, nid, &ni);
-- 
1.8.5.2