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authorJan Kara <jack@suse.cz>2009-07-17 10:40:01 -0400
committerTheodore Ts'o <tytso@mit.edu>2009-07-17 10:40:01 -0400
commitf6f50e28f0cb8d7bcdfaacc83129f005dede11b1 (patch)
treef7a0ee7cc686c0687cd4020185265ae0cd29471b /fs/jbd2
parent78f1ddbb498283c2445c11b0dfa666424c301803 (diff)
jbd2: Fail to load a journal if it is too short
Due to on disk corruption, it can happen that journal is too short. Fail to load it in such case so that we don't oops somewhere later. Signed-off-by: Jan Kara <jack@suse.cz> Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
Diffstat (limited to 'fs/jbd2')
-rw-r--r--fs/jbd2/journal.c6
1 files changed, 6 insertions, 0 deletions
diff --git a/fs/jbd2/journal.c b/fs/jbd2/journal.c
index e378cb383979..a8a358bc0f21 100644
--- a/fs/jbd2/journal.c
+++ b/fs/jbd2/journal.c
@@ -1187,6 +1187,12 @@ static int journal_reset(journal_t *journal)
1187 1187
1188 first = be32_to_cpu(sb->s_first); 1188 first = be32_to_cpu(sb->s_first);
1189 last = be32_to_cpu(sb->s_maxlen); 1189 last = be32_to_cpu(sb->s_maxlen);
1190 if (first + JBD2_MIN_JOURNAL_BLOCKS > last + 1) {
1191 printk(KERN_ERR "JBD: Journal too short (blocks %llu-%llu).\n",
1192 first, last);
1193 journal_fail_superblock(journal);
1194 return -EINVAL;
1195 }
1190 1196
1191 journal->j_first = first; 1197 journal->j_first = first;
1192 journal->j_last = last; 1198 journal->j_last = last;