From: schwarze@mdocml.bsd.lv
To: source@mdocml.bsd.lv
Subject: mdocml: Prevent unsigned integer underflow when a number is too wide for
Date: Wed, 24 Dec 2014 10:39:25 -0500 (EST) [thread overview]
Message-ID: <7627869573278475411.enqueue@fantadrom.bsd.lv> (raw)
Log Message:
-----------
Prevent unsigned integer underflow when a number is too wide
for a table cell with an "nz" layout specification,
causing essentially infinite output as found by jsg@ with afl.
Modified Files:
--------------
mdocml:
tbl_term.c
Revision Data
-------------
Index: tbl_term.c
===================================================================
RCS file: /home/cvs/mdocml/mdocml/tbl_term.c,v
retrieving revision 1.31
retrieving revision 1.32
diff -Ltbl_term.c -Ltbl_term.c -u -p -r1.31 -r1.32
--- tbl_term.c
+++ tbl_term.c
@@ -417,9 +417,13 @@ tbl_number(struct termp *tp, const struc
} else
d = sz + psz;
- padl = col->decimal - d;
-
- tbl_char(tp, ASCII_NBRSP, padl);
+ if (col->decimal > d && col->width > sz) {
+ padl = col->decimal - d;
+ if (padl + sz > col->width)
+ padl = col->width - sz;
+ tbl_char(tp, ASCII_NBRSP, padl);
+ } else
+ padl = 0;
tbl_word(tp, dp);
if (col->width > sz + padl)
tbl_char(tp, ASCII_NBRSP, col->width - sz - padl);
--
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