postgres.git / summary / log / commit / refs

commit    197427fb3f0bcfa0d40c92291f2dfd3ea1c167b8
Author:   Tom Lane <tgl@sss.pgh.pa.us>
Date:     Wed Feb 19 02:23:59 2025 +0000
First released in: 13.21, 14.18, 15.13, 16.9, 17.5

    Avoid null pointer dereference crash after OOM in Snowball stemmers.
    
    Absorb upstream bug fix (their commit
    e322673a841d9abd69994ae8cd20e191090b6ef4), which prevents a null
    pointer dereference crash if SN_create_env() gets a malloc failure
    at just the wrong point.
    
    Thanks to Maksim Korotkov for discovering the null-pointer
    bug and submitting the fix to upstream snowball.
    
    Reported-by: Maksim Korotkov <m.korotkov@postgrespro.ru>
    Author: Maksim Korotkov <m.korotkov@postgrespro.ru>
    Discussion: https://postgr.es/m/1d1a46-67ab1000-21-80c451@83151435
    Backpatch-through: 13


 src/backend/snowball/libstemmer/api.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/backend/snowball/libstemmer/api.c b/src/backend/snowball/libstemmer/api.c
index 530b427a466..1f1fb79d11f 100644
--- a/src/backend/snowball/libstemmer/api.c
+++ b/src/backend/snowball/libstemmer/api.c
@@ -40,7 +40,7 @@ error:
 extern void SN_close_env(struct SN_env * z, int S_size)
 {
     if (z == NULL) return;
-    if (S_size)
+    if (z->S)
     {
         int i;
         for (i = 0; i < S_size; i++)


[parent: a38a7ad51ec8]