From: Timo Sirainen <timo.sirainen@open-xchange.com>
Date: Tue, 27 Dec 2022 10:12:48 +0000 (-0500)
Subject: imapc: Add data stack frame when parsing message headers
X-Git-Tag: 2.4.0~3212
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=de598c8a9cabd504acd5e59c8de3953f088ec3fb;p=thirdparty%2Fdovecot%2Fcore.git

imapc: Add data stack frame when parsing message headers

This makes sure the data stack memory usage won't grow too much while
parsing a large number of headers.
---

diff --git a/src/lib-storage/index/imapc/imapc-mail-fetch.c b/src/lib-storage/index/imapc/imapc-mail-fetch.c
index 88c0ef0e04..3c4ae4ec69 100644
--- a/src/lib-storage/index/imapc/imapc-mail-fetch.c
+++ b/src/lib-storage/index/imapc/imapc-mail-fetch.c
@@ -782,8 +782,9 @@ imapc_fetch_header_stream(struct imapc_mail *mail,
 	index_mail_parse_header_init(&mail->imail, headers_ctx);
 
 	parser = message_parse_header_init(input, NULL, hdr_parser_flags);
-	while ((ret = message_parse_header_next(parser, &hdr)) > 0)
+	while ((ret = message_parse_header_next(parser, &hdr)) > 0) T_BEGIN {
 		index_mail_parse_header(NULL, hdr, &mail->imail);
+	} T_END;
 	i_assert(ret != 0);
 	index_mail_parse_header(NULL, NULL, &mail->imail);
 	message_parse_header_deinit(&parser);