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Fix BZ #18043 (c4): buffer-overflow (read past the end) in wordexp/parse_dollars/parse_param

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Paul Pluzhnikov 2015-03-09 07:22:36 -07:00
parent 95f386609f
commit 5f85a4bf94
3 changed files with 11 additions and 3 deletions
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6
ChangeLog
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@ -1,3 +1,9 @@
2015-03-09 Paul Pluzhnikov <ppluzhnikov@google.com>
[BZ #18043]
* posix/wordexp.c (parse_param): Fix buffer overflow.
* posix/wordexp-test.c (test_case): Add test case.
2015-03-09 Paul Pluzhnikov <ppluzhnikov@google.com>
[BZ #18042]

5
posix/wordexp-test.c
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@ -234,8 +234,9 @@ struct test_case_struct
{ WRDE_CMDSUB, NULL, "$((1+`echo 1`))", WRDE_NOCMD, 0, { NULL, }, IFS },
{ WRDE_CMDSUB, NULL, "$((1+$((`echo 1`))))", WRDE_NOCMD, 0, { NULL, }, IFS },
{ WRDE_SYNTAX, NULL, "`\\", 0, 0, { NULL, }, IFS }, /* BZ 18042 */
{ WRDE_SYNTAX, NULL, "${", 0, 0, { NULL, }, IFS }, /* BZ 18043 */
{ WRDE_SYNTAX, NULL, "`\\", 0, 0, { NULL, }, IFS }, /* BZ 18042 */
{ WRDE_SYNTAX, NULL, "${", 0, 0, { NULL, }, IFS }, /* BZ 18043 */
{ WRDE_SYNTAX, NULL, "L${a:", 0, 0, { NULL, }, IFS }, /* BZ 18043#c4 */
{ -1, NULL, NULL, 0, 0, { NULL, }, IFS },
};

3
posix/wordexp.c
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@ -1343,7 +1343,8 @@ parse_param (char **word, size_t *word_length, size_t *max_length,
break;
case ':':
if (strchr ("-=?+", words[1 + *offset]) == NULL)
if (words[1 + *offset] == '\0'
|| strchr ("-=?+", words[1 + *offset]) == NULL)
goto syntax;
colon_seen = 1;