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jbd2: don't leak modified metadata buffers on an aborted journal

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If the journal has been aborted, we shouldn't mark the underlying
buffer head as dirty, since that will cause the metadata block to get
modified.  And if the journal has been aborted, we shouldn't allow
this since it will almost certainly lead to a corrupted file system.

Signed-off-by: Theodore Ts'o <tytso@mit.edu>
Cc: stable@vger.kernel.org
This commit is contained in:
Theodore Ts'o 2017-02-04 23:14:19 -05:00
parent eb5efbcb76
commit e112666b49
1 changed files with 3 additions and 1 deletions
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4
fs/jbd2/transaction.c
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@ -1863,7 +1863,9 @@ static void __jbd2_journal_temp_unlink_buffer(struct journal_head *jh)
__blist_del_buffer(list, jh);
jh->b_jlist = BJ_None;
if (test_clear_buffer_jbddirty(bh))
if (transaction && is_journal_aborted(transaction->t_journal))
clear_buffer_jbddirty(bh);
else if (test_clear_buffer_jbddirty(bh))
mark_buffer_dirty(bh); /* Expose it to the VM */
}