From: Timo Sirainen <tss@iki.fi>
Date: Fri, 14 May 2010 14:18:03 +0000 (+0200)
Subject: lib-index: Give a better error message if transction log file shrinks unexpectedly.
X-Git-Tag: 2.0.beta6~217
X-Git-Url: http://git.ipfire.org/gitweb.cgi?a=commitdiff_plain;h=57549c98995eb312013f5d98ea6ccf25175a6f18;p=thirdparty%2Fdovecot%2Fcore.git

lib-index: Give a better error message if transction log file shrinks unexpectedly.

--HG--
branch : HEAD
---

diff --git a/src/lib-index/mail-transaction-log-file.c b/src/lib-index/mail-transaction-log-file.c
index 9d7c2f4a50..a6adeebe08 100644
--- a/src/lib-index/mail-transaction-log-file.c
+++ b/src/lib-index/mail-transaction-log-file.c
@@ -1146,6 +1146,12 @@ mail_transaction_log_file_sync(struct mail_transaction_log_file *file)
 	i_assert(file->sync_offset >= file->buffer_offset);
 
 	data = buffer_get_data(file->buffer, &size);
+	if (file->buffer_offset + size < file->sync_offset) {
+		mail_transaction_log_file_set_corrupted(file,
+			"log file shrank (%"PRIuUOFF_T" < %"PRIuUOFF_T")",
+			file->buffer_offset + (uoff_t)size, file->sync_offset);
+		return -1;
+	}
 	while (file->sync_offset - file->buffer_offset + sizeof(*hdr) <= size) {
 		hdr = CONST_PTR_OFFSET(data, file->sync_offset -
 				       file->buffer_offset);