diff options
| author | Tomas Vondra <tomas.vondra@postgresql.org> | 2019-12-03 16:55:51 +0100 |
|---|---|---|
| committer | Tomas Vondra <tomas.vondra@postgresql.org> | 2019-12-03 18:41:50 +0100 |
| commit | 46ce37b67a5144458adb0789eb4e9169a61881fd (patch) | |
| tree | 1a7203dcfc84d380e7650a7faf295c0c1c90f940 | |
| parent | 25c7183c06271b44ad2f13fc6ffe435544bee970 (diff) | |
Ensure maxlen is at leat 1 in dict_int
The dict_int text search dictionary template accepts maxlen parameter,
which is then used to cap the length of input strings. The value was
not properly checked, and the code simply does
txt[d->maxlen] = '\0';
to insert a terminator, leading to segfaults with negative values.
This commit simply rejects values less than 1. The issue was there since
dct_int was introduced in 9.3, so backpatch all the way back to 9.4
which is the oldest supported version.
Reported-by: cili
Discussion: https://postgr.es/m/16144-a36a5bef7657047d@postgresql.org
Backpatch-through: 9.4
| -rw-r--r-- | contrib/dict_int/dict_int.c | 5 | ||||
| -rw-r--r-- | contrib/dict_int/expected/dict_int.out | 2 | ||||
| -rw-r--r-- | contrib/dict_int/sql/dict_int.sql | 2 |
3 files changed, 9 insertions, 0 deletions
diff --git a/contrib/dict_int/dict_int.c b/contrib/dict_int/dict_int.c index 55427c4bc7b..55cffaa5fa1 100644 --- a/contrib/dict_int/dict_int.c +++ b/contrib/dict_int/dict_int.c @@ -45,6 +45,11 @@ dintdict_init(PG_FUNCTION_ARGS) if (pg_strcasecmp(defel->defname, "MAXLEN") == 0) { d->maxlen = atoi(defGetString(defel)); + + if (d->maxlen < 1) + ereport(ERROR, + (errcode(ERRCODE_INVALID_PARAMETER_VALUE), + errmsg("maxlen value has to be >= 1"))); } else if (pg_strcasecmp(defel->defname, "REJECTLONG") == 0) { diff --git a/contrib/dict_int/expected/dict_int.out b/contrib/dict_int/expected/dict_int.out index 3b766ec52ad..483e700d231 100644 --- a/contrib/dict_int/expected/dict_int.out +++ b/contrib/dict_int/expected/dict_int.out @@ -300,3 +300,5 @@ select ts_lexize('intdict', '314532610153'); {314532} (1 row) +ALTER TEXT SEARCH DICTIONARY intdict (MAXLEN = -214783648); +ERROR: maxlen value has to be >= 1 diff --git a/contrib/dict_int/sql/dict_int.sql b/contrib/dict_int/sql/dict_int.sql index 8ffec6b7708..5c27accff4a 100644 --- a/contrib/dict_int/sql/dict_int.sql +++ b/contrib/dict_int/sql/dict_int.sql @@ -51,3 +51,5 @@ select ts_lexize('intdict', '252281774'); select ts_lexize('intdict', '313425'); select ts_lexize('intdict', '641439323669'); select ts_lexize('intdict', '314532610153'); + +ALTER TEXT SEARCH DICTIONARY intdict (MAXLEN = -214783648); |