From: Timo Sirainen <timo.sirainen@open-xchange.com>
Date: Fri, 24 Sep 2021 13:35:39 +0000 (+0300)
Subject: lib-index: Handle invalid extension header names without assert-crashing
X-Git-Tag: 2.3.18~264
X-Git-Url: http://git.ipfire.org/?a=commitdiff_plain;h=f81779845af0461188762e1806b173a3d80e098d;p=thirdparty%2Fdovecot%2Fcore.git

lib-index: Handle invalid extension header names without assert-crashing

Fixes:
Panic: mail_index_ext_register(...): Invalid name
---

diff --git a/src/lib-index/mail-index-map.c b/src/lib-index/mail-index-map.c
index 329d34e14c..32d6c47cf4 100644
--- a/src/lib-index/mail-index-map.c
+++ b/src/lib-index/mail-index-map.c
@@ -208,8 +208,8 @@ int mail_index_map_ext_hdr_check(const struct mail_index_header *hdr,
 		*error_r = "Invalid field values";
 		return -1;
 	}
-	if (*name == '\0') {
-		*error_r = "Broken name";
+	if (!mail_index_ext_name_is_valid(name)) {
+		*error_r = "Invalid name";
 		return -1;
 	}