From: Daniil Sarafannikov <sarafannikovda@sgu.ru>
Date: Thu, 25 Jun 2026 21:06:26 +0000 (+0400)
Subject: s3:utils: Fix dereference of NULL ctx when memory is not allocated
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=a27631198c8bbe23e79116456357d5c2efd18948;p=thirdparty%2Fsamba.git

s3:utils: Fix dereference of NULL ctx when memory is not allocated

In case talloc_zero returns NULL, we must return NULL from
function check_ctx_create(). Otherwise, we dereference NULL
pointer when accessing fields of ctx struct.

Suggested-by: Anoop C S <anoopcs@samba.org>
Signed-off-by: Daniil Sarafannikov <sarafannikovda@sgu.ru>
Reviewed-by: Anoop C S <anoopcs@samba.org>
Reviewed-by: Volker Lendecke <vl@samba.org>

Autobuild-User(master): Volker Lendecke <vl@samba.org>
Autobuild-Date(master): Tue Jun 30 13:39:52 UTC 2026 on atb-devel-224
---

diff --git a/source3/utils/net_registry_check.c b/source3/utils/net_registry_check.c
index 52f4dab0722..aa5e65ecf81 100644
--- a/source3/utils/net_registry_check.c
+++ b/source3/utils/net_registry_check.c
@@ -293,6 +293,9 @@ static struct check_ctx* check_ctx_create(TALLOC_CTX *mem_ctx, const char *db,
 					  const struct check_options *opt)
 {
 	struct check_ctx *ctx = talloc_zero(mem_ctx, struct check_ctx);
+	if (ctx == NULL) {
+		return NULL;
+	}
 
 	ctx->opt = *opt;
 	ctx->reg = db_open_rbt(ctx);