From 83ac9194fb041d80f93a4bf1a852abc9b1471247 Mon Sep 17 00:00:00 2001 From: Andrey Rachitskiy Date: Sun, 30 Aug 2026 09:28:11 +0500 Subject: [PATCH] Check for NULL from Snowball create_env in dsnowball_init. SN_new_env and the per-language create_env wrappers return NULL on allocation failure, but locate_stem_module stored that NULL and let dsnowball_init succeed. Later SN_set_current in dsnowball_lexize then crashed. Reject a NULL env after the language module is selected. Author: Andrey Rachitskiy Reported-by: Alexander Lakhin --- src/backend/snowball/dict_snowball.c | 8 ++++++++ 1 file changed, 8 insertions(+) diff --git a/src/backend/snowball/dict_snowball.c b/src/backend/snowball/dict_snowball.c index 182bd156995..1213a59323c 100644 --- a/src/backend/snowball/dict_snowball.c +++ b/src/backend/snowball/dict_snowball.c @@ -276,6 +276,14 @@ dsnowball_init(PG_FUNCTION_ARGS) (errcode(ERRCODE_INVALID_PARAMETER_VALUE), errmsg("missing Language parameter"))); + /* + * Snowball create_env returns NULL on allocation failure. Catch it here + */ + if (d->z == NULL) + ereport(ERROR, + (errcode(ERRCODE_OUT_OF_MEMORY), + errmsg("out of memory"))); + d->dictCtx = CurrentMemoryContext; PG_RETURN_POINTER(d); -- 2.53.0