Merge tag 'drm-intel-fixes-2015-12-03' of git://anongit.freedesktop.org/drm-intel...

[platform/kernel/linux-starfive.git] / fs / xfs / xfs_log_recover.c

diff --git a/fs/xfs/xfs_log_recover.c b/fs/xfs/xfs_log_recover.c
index 0d92b6f..c5ecaac 100644 (file)
--- a/fs/xfs/xfs_log_recover.c
+++ b/fs/xfs/xfs_log_recover.c
@@ -4609,9 +4609,19 @@ xlog_recover(
        int             error;
 
        /* find the tail of the log */
-       if ((error = xlog_find_tail(log, &head_blk, &tail_blk)))
+       error = xlog_find_tail(log, &head_blk, &tail_blk);
+       if (error)
                return error;
 
+       /*
+        * The superblock was read before the log was available and thus the LSN
+        * could not be verified. Check the superblock LSN against the current
+        * LSN now that it's known.
+        */
+       if (xfs_sb_version_hascrc(&log->l_mp->m_sb) &&
+           !xfs_log_check_lsn(log->l_mp, log->l_mp->m_sb.sb_lsn))
+               return -EINVAL;
+
        if (tail_blk != head_blk) {
                /* There used to be a comment here:
                 *