From: Darrick J. Wong <djwong@xxxxxxxxxx>
We warn about suspicious roots and btree heights before metadumping the
inode btree, so do the same for the free inode btree.
Signed-off-by: Darrick J. Wong <djwong@xxxxxxxxxx>
---
db/metadump.c | 15 +++++++++++++++
1 file changed, 15 insertions(+)
diff --git a/db/metadump.c b/db/metadump.c
index c6f9d382..0d151bb8 100644
--- a/db/metadump.c
+++ b/db/metadump.c
@@ -2664,6 +2664,21 @@ copy_inodes(
root = be32_to_cpu(agi->agi_free_root);
levels = be32_to_cpu(agi->agi_free_level);
+ if (root == 0 || root > mp->m_sb.sb_agblocks) {
+ if (show_warnings)
+ print_warning("invalid block number (%u) in "
+ "finobt root in agi %u", root,
+ agno);
+ return 1;
+ }
+
+ if (levels > M_IGEO(mp)->inobt_maxlevels) {
+ if (show_warnings)
+ print_warning("invalid level (%u) in finobt "
+ "root in agi %u", levels, agno);
+ return 1;
+ }
+
finobt = 1;
if (!scan_btree(agno, root, levels, TYP_FINOBT, &finobt,
scanfunc_ino))
