From f88105d528645b5c99dbe5dcbd0300948a01c9c9 Mon Sep 17 00:00:00 2001
From: Yusuke Nojima <nojima718@gmail.com>
Date: Sun, 30 Apr 2017 02:37:53 +0900
Subject: [PATCH] journald: fix assertion failure on journal_file_link_data.
 (#5843)

When some error occurs during the initialization of JournalFile,
the JournalFile can be left without hash tables created.  When later
trying to append an entry to that file, the assertion in
journal_file_link_data() fails, and journald crashes.

This patch fix this issue by checking *_hash_table_size in
journal_file_verify_header().
(cherry picked from commit 5b3cc0c86aeddd4615e7e28e79aa89e5b77a6507)
---
 src/journal/journal-file.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/src/journal/journal-file.c b/src/journal/journal-file.c
index 14cb01a600..243d5198d9 100644
--- a/src/journal/journal-file.c
+++ b/src/journal/journal-file.c
@@ -613,6 +613,9 @@ static int journal_file_verify_header(JournalFile *f) {
                         return -EBUSY;
                 }
 
+                if (f->header->field_hash_table_size == 0 || f->header->data_hash_table_size == 0)
+                        return -EBADMSG;
+
                 /* Don't permit appending to files from the future. Because otherwise the realtime timestamps wouldn't
                  * be strictly ordered in the entries in the file anymore, and we can't have that since it breaks
                  * bisection. */