From: Timo Sirainen <timo.sirainen@open-xchange.com>
Date: Wed, 20 Mar 2024 10:03:43 +0000 (+0200)
Subject: config: Fix potential crash parsing configuration with obsolete settings
X-Git-Tag: 2.4.0~1710
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=3b67affb477ba3cedc8f2e101d72bf4491d59c3f;p=thirdparty%2Fdovecot%2Fcore.git

config: Fix potential crash parsing configuration with obsolete settings
---

diff --git a/src/config/config-parser.c b/src/config/config-parser.c
index 490426b337..ccd5e59d61 100644
--- a/src/config/config-parser.c
+++ b/src/config/config-parser.c
@@ -1335,6 +1335,12 @@ config_parser_check_warnings(struct config_parser_context *ctx, const char *key)
 {
 	const char *path, *first_pos;
 
+	if (ctx->cur_input == NULL) {
+		/* coming from old_settings_handle_post() - we don't need to
+		   track seen settings in there. */
+		return;
+	}
+
 	first_pos = hash_table_lookup(ctx->seen_settings, key);
 	if (ctx->cur_section->prev == NULL) {
 		/* changing a root setting. if we've already seen it inside