From: Daniel Gustafsson <dgustafsson@postgresql.org>
Date: Thu, 17 Apr 2025 10:58:00 +0000 (+0200)
Subject: pg_dump: Set private_date pointer to NULL in callback
X-Git-Tag: REL_18_BETA1~138
X-Git-Url: http://git.ipfire.org/?a=commitdiff_plain;h=b669293e3432ee8fdcd44854a945837bb18eea5c;p=thirdparty%2Fpostgresql.git

pg_dump: Set private_date pointer to NULL in callback

The end callback for ZStandard compression frees the private_data
but didn't set the pointer to NULL after freeing.  This is not a
bug as the code is right now, since nothing is dereferencing the
pointer upon returning from the callback but it is good practice
to do.

Author: Alexander Kuznetsov <kuznetsovam@altlinux.org>
Reviewed-by: Daniel Gustafsson <daniel@yesql.se>
Reviewed-by: Ashutosh Bapat <ashutosh.bapat.oss@gmail.com>
Reviewed-by: Michael Paquier <michael@paquier.xyz>
Reviewed-by: Tom Lane <tgl@sss.pgh.pa.us>
Discussion: https://postgr.es/m/efaee52b-9550-44ca-8633-ea86076b3283@altlinux.org
---

diff --git a/src/bin/pg_dump/compress_zstd.c b/src/bin/pg_dump/compress_zstd.c
index 1f7b4942706..cb595b10c2d 100644
--- a/src/bin/pg_dump/compress_zstd.c
+++ b/src/bin/pg_dump/compress_zstd.c
@@ -142,6 +142,7 @@ EndCompressorZstd(ArchiveHandle *AH, CompressorState *cs)
 	/* output buffer may be allocated in either mode */
 	pg_free(zstdcs->output.dst);
 	pg_free(zstdcs);
+	cs->private_data = NULL;
 }
 
 static void