summaryrefslogtreecommitdiffstats
path: root/fs
diff options
context:
space:
mode:
authorOlaf Weber <olaf@sgi.com>2009-04-17 16:12:45 -0500
committerFelix Blyakher <felixb@sgi.com>2009-04-30 00:26:14 -0500
commitb9ec9068d79e039507a247ebc5bc9c0ce53654ce (patch)
treee90838da3d37d9a5ab05301b421ad85e5514acba /fs
parentdef6b3ba56b637d58126ef67fc19bab57945fcc4 (diff)
downloadop-kernel-dev-b9ec9068d79e039507a247ebc5bc9c0ce53654ce.zip
op-kernel-dev-b9ec9068d79e039507a247ebc5bc9c0ce53654ce.tar.gz
xfs: add more checks to superblock validation
There had been reports where xfs filesystem was randomly corrupted with fsfuzzer, and xfs failed to handle it gracefully. This patch fixes couple of reported problem by providing additional checks in the superblock validation routine. Signed-off-by: Olaf Weber <olaf@sgi.com> Reviewed-by: Josef 'Jeff' Sipek <jeffpc@josefsipek.net> Reviewed-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Felix Blyakher <felixb@sgi.com>
Diffstat (limited to 'fs')
-rw-r--r--fs/xfs/xfs_mount.c3
1 files changed, 3 insertions, 0 deletions
diff --git a/fs/xfs/xfs_mount.c b/fs/xfs/xfs_mount.c
index b101990..65a9972 100644
--- a/fs/xfs/xfs_mount.c
+++ b/fs/xfs/xfs_mount.c
@@ -291,14 +291,17 @@ xfs_mount_validate_sb(
sbp->sb_sectsize > XFS_MAX_SECTORSIZE ||
sbp->sb_sectlog < XFS_MIN_SECTORSIZE_LOG ||
sbp->sb_sectlog > XFS_MAX_SECTORSIZE_LOG ||
+ sbp->sb_sectsize != (1 << sbp->sb_sectlog) ||
sbp->sb_blocksize < XFS_MIN_BLOCKSIZE ||
sbp->sb_blocksize > XFS_MAX_BLOCKSIZE ||
sbp->sb_blocklog < XFS_MIN_BLOCKSIZE_LOG ||
sbp->sb_blocklog > XFS_MAX_BLOCKSIZE_LOG ||
+ sbp->sb_blocksize != (1 << sbp->sb_blocklog) ||
sbp->sb_inodesize < XFS_DINODE_MIN_SIZE ||
sbp->sb_inodesize > XFS_DINODE_MAX_SIZE ||
sbp->sb_inodelog < XFS_DINODE_MIN_LOG ||
sbp->sb_inodelog > XFS_DINODE_MAX_LOG ||
+ sbp->sb_inodesize != (1 << sbp->sb_inodelog) ||
(sbp->sb_blocklog - sbp->sb_inodelog != sbp->sb_inopblog) ||
(sbp->sb_rextsize * sbp->sb_blocksize > XFS_MAX_RTEXTSIZE) ||
(sbp->sb_rextsize * sbp->sb_blocksize < XFS_MIN_RTEXTSIZE) ||
OpenPOWER on IntegriCloud