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| author | Jan Kara <jack@suse.cz> | 2009-07-15 20:36:08 +0200 |
|---|---|---|
| committer | Jan Kara <jack@suse.cz> | 2009-07-15 21:26:23 +0200 |
| commit | 7447a668a3860b66b3c9db86fdea91e355ba59ac (patch) | |
| tree | f27e2c1df19e6558bce053e8ffa12bd121a30947 /fs/jbd/journal.c | |
| parent | e9e961c9a818a2f24711af493b907a8e40a69efc (diff) | |
| download | op-kernel-dev-7447a668a3860b66b3c9db86fdea91e355ba59ac.zip op-kernel-dev-7447a668a3860b66b3c9db86fdea91e355ba59ac.tar.gz | |
jbd: 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.
Reported-by: Nageswara R Sastry <rnsastry@linux.vnet.ibm.com>
Signed-off-by: Jan Kara <jack@suse.cz>
Diffstat (limited to 'fs/jbd/journal.c')
| -rw-r--r-- | fs/jbd/journal.c | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/fs/jbd/journal.c b/fs/jbd/journal.c index 737f724..94a64a1 100644 --- a/fs/jbd/journal.c +++ b/fs/jbd/journal.c @@ -848,6 +848,12 @@ static int journal_reset(journal_t *journal) first = be32_to_cpu(sb->s_first); last = be32_to_cpu(sb->s_maxlen); + if (first + JFS_MIN_JOURNAL_BLOCKS > last + 1) { + printk(KERN_ERR "JBD: Journal too short (blocks %lu-%lu).\n", + first, last); + journal_fail_superblock(journal); + return -EINVAL; + } journal->j_first = first; journal->j_last = last; |
