Thread: pgsql: Ensure maxlen is at leat 1 in dict_int
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 Branch ------ REL_10_STABLE Details ------- https://git.postgresql.org/pg/commitdiff/46ce37b67a5144458adb0789eb4e9169a61881fd Modified Files -------------- contrib/dict_int/dict_int.c | 5 +++++ contrib/dict_int/expected/dict_int.out | 2 ++ contrib/dict_int/sql/dict_int.sql | 2 ++ 3 files changed, 9 insertions(+)