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-rw-r--r--lib/sqfs/deserialize_fstree.c22
1 files changed, 22 insertions, 0 deletions
diff --git a/lib/sqfs/deserialize_fstree.c b/lib/sqfs/deserialize_fstree.c
index f758a61..050a1df 100644
--- a/lib/sqfs/deserialize_fstree.c
+++ b/lib/sqfs/deserialize_fstree.c
@@ -65,6 +65,18 @@ static int restore_xattr(xattr_reader_t *xr, fstree_t *fs, tree_node_t *node,
return xattr_reader_restore_node(xr, fs, node, idx);
}
+static bool node_would_be_own_parent(tree_node_t *root, tree_node_t *n)
+{
+ while (root != NULL) {
+ if (root->inode_num == n->inode_num)
+ return true;
+
+ root = root->parent;
+ }
+
+ return false;
+}
+
static int fill_dir(meta_reader_t *ir, meta_reader_t *dr, tree_node_t *root,
sqfs_super_t *super, id_table_t *idtbl, fstree_t *fs,
xattr_reader_t *xr, int flags)
@@ -128,6 +140,16 @@ static int fill_dir(meta_reader_t *ir, meta_reader_t *dr, tree_node_t *root,
return -1;
}
+ if (node_would_be_own_parent(root, n)) {
+ fputs("WARNING: Found a directory that "
+ "contains itself, skipping loop back "
+ "reference!\n", stderr);
+ free(n);
+ free(ent);
+ free(inode);
+ continue;
+ }
+
if (flags & RDTREE_READ_XATTR) {
if (restore_xattr(xr, fs, n, inode)) {
free(n);