Merge pull request #273 from rkta/bsoob

Fix OOB access due to multiple backspaces
2023-07-18 21:05:21 +09:00
parent 93ad5ee7da edc602651c
commit 25fb402cea
1 changed files with 8 additions and 2 deletions
--- a/etc.c
+++ b/etc.c
@@ -393,6 +393,9 @@ checkType(Str s, Lineprop **oprop, Linecolor **ocolor)
 			    if (color)
 				color -= plen;
 #endif
+			    if (plens == plens_buffer)
+				plen = 0;
+			    else
 				plen = *(--plens);
 			    str += 2;
 			}
@@ -419,6 +422,9 @@ checkType(Str s, Lineprop **oprop, Linecolor **ocolor)
 			    if (color)
 				color -= plen;
 #endif
+			    if (plens == plens_buffer)
+				plen = 0;
+			    else
 				plen = *(--plens);
 			    str++;
 			}