* mdocml: Do not mark a block with the MDOC_BROKEN flag if it merely
@ 2015-04-29 14:49 schwarze
0 siblings, 0 replies; only message in thread
From: schwarze @ 2015-04-29 14:49 UTC (permalink / raw)
To: source
Log Message:
-----------
Do not mark a block with the MDOC_BROKEN flag if it merely contains
a mismatching explicit end macro without actually being broken.
Avoids a subsequent upward search for the non-existent breaker
ending up in a NULL pointer access; afl test case 005/Apr27 from jsg@.
Modified Files:
--------------
mdocml:
mdoc_macro.c
Revision Data
-------------
Index: mdoc_macro.c
===================================================================
RCS file: /home/cvs/mdocml/mdocml/mdoc_macro.c,v
retrieving revision 1.195
retrieving revision 1.196
diff -Lmdoc_macro.c -Lmdoc_macro.c -u -p -r1.195 -r1.196
--- mdoc_macro.c
+++ mdoc_macro.c
@@ -644,6 +644,8 @@ blk_exp_close(MACRO_PROT_ARGS)
if (body == NULL) {
mandoc_msg(MANDOCERR_BLK_NOTOPEN, mdoc->parse,
line, ppos, mdoc_macronames[tok]);
+ if (later != NULL)
+ later->flags &= ~MDOC_BROKEN;
if (maxargs && endbody == NULL) {
/*
* Stray .Ec without previous .Eo:
--
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