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| author | Lachlan McIlroy <lachlan@sgi.com> | 2008-10-30 16:53:25 +1100 |
|---|---|---|
| committer | Lachlan McIlroy <lachlan@redback.melbourne.sgi.com> | 2008-11-10 17:43:23 +1100 |
| commit | 9ccbece546cf836f67f6d9bb4bf2f70f7476cb2c (patch) | |
| tree | 86b6b97537c46eb70555fbe8ffdc16e1ec8b69d0 | |
| parent | 75fa67706cce5272bcfc51ed646f2da21f3bdb6e (diff) | |
| download | linux-9ccbece546cf836f67f6d9bb4bf2f70f7476cb2c.tar.bz2 | |
[XFS] Fix use-after-free with log and quotas
Destroying the quota stuff on unmount can access the log - ie
XFS_QM_DONE() ends up in xfs_dqunlock() which calls
xfs_trans_unlocked_item() and then xfs_log_move_tail(). By this time the
log has already been destroyed. Just move the cleanup of the quota code
earlier in xfs_unmountfs() before the call to xfs_log_unmount(). Moving
XFS_QM_DONE() up near XFS_QM_DQPURGEALL() seems like a good spot.
SGI-PV: 987086
SGI-Modid: xfs-linux-melb:xfs-kern:32148a
Signed-off-by: Lachlan McIlroy <lachlan@sgi.com>
Signed-off-by: Christoph Hellwig <hch@infradead.org>
Signed-off-by: Peter Leckie <pleckie@sgi.com>
| -rw-r--r-- | fs/xfs/xfs_mount.c | 5 |
1 files changed, 3 insertions, 2 deletions
diff --git a/fs/xfs/xfs_mount.c b/fs/xfs/xfs_mount.c index a4503f5e9497..15f5dd22fbb2 100644 --- a/fs/xfs/xfs_mount.c +++ b/fs/xfs/xfs_mount.c @@ -1245,6 +1245,9 @@ xfs_unmountfs( XFS_QM_DQPURGEALL(mp, XFS_QMOPT_QUOTALL | XFS_QMOPT_UMOUNTING); + if (mp->m_quotainfo) + XFS_QM_DONE(mp); + /* * Flush out the log synchronously so that we know for sure * that nothing is pinned. This is important because bflush() @@ -1297,8 +1300,6 @@ xfs_unmountfs( xfs_errortag_clearall(mp, 0); #endif xfs_free_perag(mp); - if (mp->m_quotainfo) - XFS_QM_DONE(mp); } STATIC void |