* mdocml: Do not read past the end of the buffer if an "f" layout font
@ 2015-02-10 11:03 schwarze
0 siblings, 0 replies; only message in thread
From: schwarze @ 2015-02-10 11:03 UTC (permalink / raw)
To: source
Log Message:
-----------
Do not read past the end of the buffer if an "f" layout font modifier
is followed by the end of the input line instead of a font specifier.
Found by jsg@ with afl, test case #591.
While here, improve functionality as well:
* There is no "r" font modifier.
* Font specifiers (as opposed to font modifiers) are case sensitive.
* One-character font specifiers require trailing whitespace.
* Ignore parenthised and two-letter font specifiers.
Modified Files:
--------------
mdocml:
tbl_layout.c
Revision Data
-------------
Index: tbl_layout.c
===================================================================
RCS file: /home/cvs/mdocml/mdocml/tbl_layout.c,v
retrieving revision 1.37
retrieving revision 1.38
diff -Ltbl_layout.c -Ltbl_layout.c -u -p -r1.37 -r1.38
--- tbl_layout.c
+++ tbl_layout.c
@@ -97,12 +97,8 @@ mod:
switch (tolower((unsigned char)p[(*pos)++])) {
case 'b':
- /* FALLTHROUGH */
- case 'i':
- /* FALLTHROUGH */
- case 'r':
- (*pos)--;
- break;
+ cp->flags |= TBL_CELL_BOLD;
+ goto mod;
case 'd':
cp->flags |= TBL_CELL_BALIGN;
goto mod;
@@ -111,6 +107,9 @@ mod:
goto mod;
case 'f':
break;
+ case 'i':
+ cp->flags |= TBL_CELL_ITALIC;
+ goto mod;
case 'm':
mandoc_msg(MANDOCERR_TBLLAYOUT_MOD, tbl->parse,
ln, *pos, "m");
@@ -150,20 +149,37 @@ mod:
goto mod;
}
- switch (tolower((unsigned char)p[(*pos)++])) {
+ /* Ignore parenthised font names for now. */
+
+ if (p[*pos] == '(')
+ goto mod;
+
+ /* Support only one-character font-names for now. */
+
+ if (p[*pos] == '\0' || (p[*pos + 1] != ' ' && p[*pos + 1] != '.')) {
+ mandoc_vmsg(MANDOCERR_FT_BAD, tbl->parse,
+ ln, *pos, "TS %s", p + *pos - 1);
+ if (p[*pos] != '\0')
+ (*pos)++;
+ if (p[*pos] != '\0')
+ (*pos)++;
+ goto mod;
+ }
+
+ switch (p[(*pos)++]) {
case '3':
/* FALLTHROUGH */
- case 'b':
+ case 'B':
cp->flags |= TBL_CELL_BOLD;
goto mod;
case '2':
/* FALLTHROUGH */
- case 'i':
+ case 'I':
cp->flags |= TBL_CELL_ITALIC;
goto mod;
case '1':
/* FALLTHROUGH */
- case 'r':
+ case 'R':
goto mod;
default:
mandoc_vmsg(MANDOCERR_FT_BAD, tbl->parse,
--
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