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authorOlaf Weber <olaf@sgi.com>2009-04-17 16:12:45 -0500
committerFelix Blyakher <felixb@sgi.com>2009-04-29 09:24:29 -0500
commit2ac00af7a6d2e65013e6f28bd1f37c0cd98ba134 (patch)
treea04390733906bc8bb9d26c0a8dce12279cbb83cf /fs/xfs
parentf25181f598cf4a8ccc40a51d8b74f8b555ecddee (diff)
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/xfs')
-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 b101990df027..65a99725d0cc 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) ||