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* mandoc: fix a NULL pointer access on empty tbl(7) data cells that
@ 2019-03-18  8:01 schwarze
  0 siblings, 0 replies; only message in thread
From: schwarze @ 2019-03-18  8:01 UTC (permalink / raw)
  To: source

Log Message:
-----------
fix a NULL pointer access on empty tbl(7) data cells
that bentley@ found in syncthing-bep(7)

Modified Files:
--------------
    mandoc:
        tbl_term.c

Revision Data
-------------
Index: tbl_term.c
===================================================================
RCS file: /home/cvs/mandoc/mandoc/tbl_term.c,v
retrieving revision 1.69
retrieving revision 1.70
diff -Ltbl_term.c -Ltbl_term.c -u -p -r1.69 -r1.70
--- tbl_term.c
+++ tbl_term.c
@@ -629,7 +629,8 @@ tbl_hrule(struct termp *tp, const struct
 
 		lw = cpp == NULL || cpn == NULL ||
 		    (cpn->pos != TBL_CELL_DOWN &&
-		     (dpn == NULL || strcmp(dpn->string, "\\^") != 0))
+		     (dpn == NULL || dpn->string == NULL ||
+		      strcmp(dpn->string, "\\^") != 0))
 		    ? hw : 0;
 		tbl_direct_border(tp, BHORIZ * lw,
 		    col->width + col->spacing / 2);
@@ -675,7 +676,8 @@ tbl_hrule(struct termp *tp, const struct
 
 		rw = cpp == NULL || cpn == NULL ||
 		    (cpn->pos != TBL_CELL_DOWN &&
-		     (dpn == NULL || strcmp(dpn->string, "\\^") != 0))
+		     (dpn == NULL || dpn->string == NULL ||
+		      strcmp(dpn->string, "\\^") != 0))
 		    ? hw : 0;
 
 		/* The line crossing at the end of this column. */
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