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 ------ REL9_5_STABLE Details ------- https://git.postgresql.org/pg/commitdiff/a2fdeb7863a684b661b0fcbaf90f00595be11bd0 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(+)