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| author | Darrick J. Wong <darrick.wong@oracle.com> | 2017-10-25 16:59:43 -0700 |
|---|---|---|
| committer | Darrick J. Wong <darrick.wong@oracle.com> | 2017-10-26 15:38:29 -0700 |
| commit | 9c92ee208b1faa0ef2cc899b85fd0607b6fac7fe (patch) | |
| tree | e3cbb330bef91efa154c4b1809c325036a77b7f0 /fs/xfs/xfs_log.c | |
| parent | f1b92bbc2373902063d04d28bff1ab79edc00df3 (diff) | |
| download | linux-9c92ee208b1faa0ef2cc899b85fd0607b6fac7fe.tar.gz | |
xfs: validate sb_logsunit is a multiple of the fs blocksize
Make sure the log stripe unit is sane before proceeding with mounting. AFAICT this means that logsunit has to be 0, 1, or a multiple of the fs block size. Found this by setting the LSB of logsunit in xfs/350 and watching the system crash as soon as we try to write to the log. Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com> Reviewed-by: Brian Foster <bfoster@redhat.com>
Diffstat (limited to 'fs/xfs/xfs_log.c')
| -rw-r--r-- | fs/xfs/xfs_log.c | 14 |
1 files changed, 13 insertions, 1 deletions
diff --git a/fs/xfs/xfs_log.c b/fs/xfs/xfs_log.c index ab59e78a5d87..0c4c9ad3be70 100644 --- a/fs/xfs/xfs_log.c +++ b/fs/xfs/xfs_log.c @@ -608,6 +608,7 @@ xfs_log_mount( xfs_daddr_t blk_offset, int num_bblks) { + bool fatal = xfs_sb_version_hascrc(&mp->m_sb); int error = 0; int min_logfsbs; @@ -659,9 +660,20 @@ xfs_log_mount( XFS_FSB_TO_B(mp, mp->m_sb.sb_logblocks), XFS_MAX_LOG_BYTES); error = -EINVAL; + } else if (mp->m_sb.sb_logsunit > 1 && + mp->m_sb.sb_logsunit % mp->m_sb.sb_blocksize) { + xfs_warn(mp, + "log stripe unit %u bytes must be a multiple of block size", + mp->m_sb.sb_logsunit); + error = -EINVAL; + fatal = true; } if (error) { - if (xfs_sb_version_hascrc(&mp->m_sb)) { + /* + * Log check errors are always fatal on v5; or whenever bad + * metadata leads to a crash. + */ + if (fatal) { xfs_crit(mp, "AAIEEE! Log failed size checks. Abort!"); ASSERT(0); goto out_free_log; |