File cmark-gfm-CVE-2023-22486.patch of Package cmark.28333

diff --unified --recursive --text --new-file --color cmark-0.30.2.old/src/inlines.c cmark-0.30.2.new/src/inlines.c
--- cmark-0.30.2.old/src/inlines.c	2021-09-24 23:56:14.000000000 +0800
+++ cmark-0.30.2.new/src/inlines.c	2023-03-22 12:26:45.728198282 +0800
@@ -66,6 +66,7 @@
   bracket *last_bracket;
   bufsize_t backticks[MAXBACKTICKS + 1];
   bool scanned_for_backticks;
+  bool no_link_openers;
 } subject;
 
 static CMARK_INLINE bool S_is_line_end_char(char c) {
@@ -207,6 +208,7 @@
     e->backticks[i] = 0;
   }
   e->scanned_for_backticks = false;
+  e->no_link_openers = true;
 }
 
 static CMARK_INLINE int isbacktick(int c) { return (c == '`'); }
@@ -551,6 +553,9 @@
   b->position = subj->pos;
   b->bracket_after = false;
   subj->last_bracket = b;
+  if (!image) {
+    subj->no_link_openers = false;
+  }
 }
 
 // Assumes the subject has a c at the current position.
@@ -1108,16 +1113,16 @@
     return make_str(subj, subj->pos - 1, subj->pos - 1, cmark_chunk_literal("]"));
   }
 
-  if (!opener->active) {
+  // If we got here, we matched a potential link/image text.
+  // Now we check to see if it's a link/image.
+  is_image = opener->image;
+
+  if (!is_image && subj->no_link_openers) {
     // take delimiter off stack
     pop_bracket(subj);
     return make_str(subj, subj->pos - 1, subj->pos - 1, cmark_chunk_literal("]"));
   }
 
-  // If we got here, we matched a potential link/image text.
-  // Now we check to see if it's a link/image.
-  is_image = opener->image;
-
   after_link_text_pos = subj->pos;
 
   // First, look for an inline link.
@@ -1213,21 +1218,11 @@
   process_emphasis(subj, opener->position);
   pop_bracket(subj);
 
-  // Now, if we have a link, we also want to deactivate earlier link
-  // delimiters. (This code can be removed if we decide to allow links
+  // Now, if we have a link, we also want to deactivate links until
+  // we get a new opener. (This code can be removed if we decide to allow links
   // inside links.)
   if (!is_image) {
-    opener = subj->last_bracket;
-    while (opener != NULL) {
-      if (!opener->image) {
-        if (!opener->active) {
-          break;
-        } else {
-          opener->active = false;
-        }
-      }
-      opener = opener->previous;
-    }
+    subj->no_link_openers = true;
   }
 
   return NULL;