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Red Hat issue 1021958: fixed a bug with faulty buffer/data length calculation in xio-ascii.c:_xiodump()

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This commit is contained in:
Gerhard Rieger 2013-12-20 17:46:45 +01:00
parent bf17d38dab
commit a214cbca6f
2 changed files with 10 additions and 5 deletions
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3
CHANGES
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@ -30,6 +30,9 @@ corrections:
On big endian platforms with type long >32bit the range option applied a
bad base address. Thanks to hejia hejia for reporting and fixing this bug.
Red Hat issue 1021958: fixed a bug with faulty buffer/data length
calculation in xio-ascii.c:_xiodump()
porting:
Performed changes for Fedora release 19

12
xio-ascii.c
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@ -1,5 +1,5 @@
/* source: xio-ascii.c */
/* Copyright Gerhard Rieger 2002-2008 */
/* Copyright Gerhard Rieger */
/* Published under the GNU General Public License V.2, see file COPYING */
/* this file contains functions for text encoding, decoding, and conversions */
@ -111,6 +111,7 @@ char *
coding specifies how the data is to be presented. Not much to select now.
returns a pointer to the first char in codbuff that has not been overwritten;
it might also point to the first char after the buffer!
this function does not write a terminating \0
*/
static char *
_xiodump(const unsigned char *data, size_t bytes, char *codbuff, size_t codlen,
@ -118,16 +119,17 @@ _xiodump(const unsigned char *data, size_t bytes, char *codbuff, size_t codlen,
int start = 1;
int space = coding & 0xff;
if (bytes <= 0) { codbuff[0] = '\0'; return codbuff; }
if (bytes <= 0) { return codbuff; }
if (codlen < 1) { return codbuff; }
if (space == 0) space = -1;
if (0) {
; /* for canonical reasons */
} else if (1) {
/* simple hexadecimal output */
if (bytes > 2*codlen+1) {
bytes = (codlen-1)/2;
if (3*bytes+1 > codlen) {
bytes = (codlen-1)/3; /* "truncate" data so generated text fits */
}
*codbuff++ = 'x'; --codlen;
*codbuff++ = 'x';
while (bytes-- > 0) {
if (start == 0 && space == 0) {
*codbuff++ = ' ';