4.9-stable review patch. If anyone has any objections, please let me know.
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From: Theodore Ts'o tytso@mit.edu
commit 85e0c4e89c1b864e763c4e3bb15d0b6d501ad5d9 upstream.
This updates the jbd2 superblock unnecessarily, and on an abort we shouldn't truncate the log.
Signed-off-by: Theodore Ts'o tytso@mit.edu Cc: stable@vger.kernel.org Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org
--- fs/jbd2/journal.c | 5 ++++- 1 file changed, 4 insertions(+), 1 deletion(-)
--- a/fs/jbd2/journal.c +++ b/fs/jbd2/journal.c @@ -951,7 +951,7 @@ out: }
/* - * This is a variaon of __jbd2_update_log_tail which checks for validity of + * This is a variation of __jbd2_update_log_tail which checks for validity of * provided log tail and locks j_checkpoint_mutex. So it is safe against races * with other threads updating log tail. */ @@ -1394,6 +1394,9 @@ int jbd2_journal_update_sb_log_tail(jour journal_superblock_t *sb = journal->j_superblock; int ret;
+ if (is_journal_aborted(journal)) + return -EIO; + BUG_ON(!mutex_is_locked(&journal->j_checkpoint_mutex)); jbd_debug(1, "JBD2: updating superblock (start %lu, seq %u)\n", tail_block, tail_tid);