From: Vsevolod Stakhov <vsevolod@highsecure.ru>
Date: Mon, 19 Jul 2021 15:47:42 +0000 (+0100)
Subject: [Minor] Fix crash on redundant <style> tag
X-Git-Tag: 3.0~129
X-Git-Url: https://source.dussan.org/?a=commitdiff_plain;h=24214a2fa4485f08476d69c3b48619dd4ac309ac;p=rspamd.git

[Minor] Fix crash on redundant <style> tag
---

diff --git a/src/libserver/html/html.cxx b/src/libserver/html/html.cxx
index 9b3a8a3ee..c5dea793a 100644
--- a/src/libserver/html/html.cxx
+++ b/src/libserver/html/html.cxx
@@ -1772,7 +1772,8 @@ html_process_input(rspamd_mempool_t *pool,
 				if (cur_tag->id == Tag_STYLE && allow_css) {
 					auto *opening_tag = cur_tag->parent;
 
-					if (opening_tag && opening_tag->content_offset < opening_tag->closing.start) {
+					if (opening_tag && opening_tag->id == Tag_STYLE &&
+						(int)opening_tag->content_offset < opening_tag->closing.start) {
 						auto ret_maybe = rspamd::css::parse_css(pool,
 								{start + opening_tag->content_offset,
 								 opening_tag->closing.start - opening_tag->content_offset},