commit 5aac0be: [Minor] Add safe-guard for the root tag

[Vsevolod Stakhov]

Author: Vsevolod Stakhov
Date: 2021-11-19 10:49:54 +0000
URL: https://github.com/rspamd/rspamd/commit/5aac0be13a65b396fd1c62ff95fb8657cc109a32 (HEAD -> master)

[Minor] Add safe-guard for the root tag

---
 src/libserver/html/html.cxx | 12 +++++++-----
 1 file changed, 7 insertions(+), 5 deletions(-)

diff --git a/src/libserver/html/html.cxx b/src/libserver/html/html.cxx
index 5260ba690..a920f9a4f 100644
--- a/src/libserver/html/html.cxx
+++ b/src/libserver/html/html.cxx
@@ -1400,18 +1400,20 @@ html_process_input(rspamd_mempool_t *pool,
 		}
 
 		if (pt) {
+			g_assert(cur_tag != pt);
 			cur_tag->parent = pt;
-			g_assert(cur_tag->parent != cur_tag);
 			g_assert(cur_tag->parent != &cur_closing_tag);
 			parent_tag = pt;
 			parent_tag->children.push_back(cur_tag);
 		}
 		else {
 			if (hc->root_tag) {
-				cur_tag->parent = hc->root_tag;
-				g_assert(cur_tag->parent != cur_tag);
-				hc->root_tag->children.push_back(cur_tag);
-				parent_tag = hc->root_tag;
+				if (cur_tag != hc->root_tag) {
+					cur_tag->parent = hc->root_tag;
+					g_assert(cur_tag->parent != cur_tag);
+					hc->root_tag->children.push_back(cur_tag);
+					parent_tag = hc->root_tag;
+				}
 			}
 			else {
 				if (cur_tag->id == Tag_HTML) {