diff options
| -rw-r--r-- | fs/jbd2/journal.c | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/fs/jbd2/journal.c b/fs/jbd2/journal.c index e378cb3..a8a358b 100644 --- a/fs/jbd2/journal.c +++ b/fs/jbd2/journal.c @@ -1187,6 +1187,12 @@ static int journal_reset(journal_t *journal) first = be32_to_cpu(sb->s_first); last = be32_to_cpu(sb->s_maxlen); + if (first + JBD2_MIN_JOURNAL_BLOCKS > last + 1) { + printk(KERN_ERR "JBD: Journal too short (blocks %llu-%llu).\n", + first, last); + journal_fail_superblock(journal); + return -EINVAL; + } journal->j_first = first; journal->j_last = last; |