From: schwarze@mdocml.bsd.lv
To: source@mdocml.bsd.lv
Subject: mdocml: explicit blocks close out .Nd; fixing data structure corruption
Date: Wed, 11 Feb 2015 08:38:27 -0500 (EST) [thread overview]
Message-ID: <6716991213336579630.enqueue@fantadrom.bsd.lv> (raw)
Log Message:
-----------
explicit blocks close out .Nd; fixing data structure corruption
eventually leading to NULL pointer access;
found by jsg@ with afl, text case #455.
Modified Files:
--------------
mdocml:
mdoc_macro.c
Revision Data
-------------
Index: mdoc_macro.c
===================================================================
RCS file: /home/cvs/mdocml/mdocml/mdoc_macro.c,v
retrieving revision 1.181
retrieving revision 1.182
diff -Lmdoc_macro.c -Lmdoc_macro.c -u -p -r1.181 -r1.182
--- mdoc_macro.c
+++ mdoc_macro.c
@@ -630,6 +630,13 @@ blk_exp_close(MACRO_PROT_ARGS)
break;
}
+ /* Explicit blocks close out description lines. */
+
+ if (n->tok == MDOC_Nd) {
+ rew_last(mdoc, n);
+ continue;
+ }
+
/*
* When finding an open sub block, remember the last
* open explicit block, or, in case there are only
--
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