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authorNathan Scott <nscott@aconex.com>2007-05-14 18:24:02 +1000
committerTim Shimmin <tes@chook.melbourne.sgi.com>2007-07-14 15:21:29 +1000
commit4cc929ee305c69573cb842aade059dbe2a93940c (patch)
treebf6cee68d7ca81296864576f27e68900e122d04f /fs/xfs/xfs_rtalloc.c
parent1fa40b01ae4d1b00e366d4949edcc230f5cd6d99 (diff)
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[XFS] Don't grow filesystems past the size they can index.
When growing a filesystem we don't check to see if the new size overflows the page cache index range, so we can do silly things like grow a filesystem page 16TB on a 32bit. Check new filesystem sizes against the limits the kernel can support. SGI-PV: 957886 SGI-Modid: xfs-linux-melb:xfs-kern:28563a Signed-Off-By: Nathan Scott <nscott@aconex.com> Signed-off-by: David Chinner <dgc@sgi.com> Signed-off-by: Tim Shimmin <tes@sgi.com>
Diffstat (limited to 'fs/xfs/xfs_rtalloc.c')
-rw-r--r--fs/xfs/xfs_rtalloc.c4
1 files changed, 3 insertions, 1 deletions
diff --git a/fs/xfs/xfs_rtalloc.c b/fs/xfs/xfs_rtalloc.c
index b3a5f07bd073..47082c01872d 100644
--- a/fs/xfs/xfs_rtalloc.c
+++ b/fs/xfs/xfs_rtalloc.c
@@ -1882,11 +1882,13 @@ xfs_growfs_rt(
(nrblocks = in->newblocks) <= sbp->sb_rblocks ||
(sbp->sb_rblocks && (in->extsize != sbp->sb_rextsize)))
return XFS_ERROR(EINVAL);
+ if ((error = xfs_sb_validate_fsb_count(sbp, nrblocks)))
+ return error;
/*
* Read in the last block of the device, make sure it exists.
*/
error = xfs_read_buf(mp, mp->m_rtdev_targp,
- XFS_FSB_TO_BB(mp, in->newblocks - 1),
+ XFS_FSB_TO_BB(mp, nrblocks - 1),
XFS_FSB_TO_BB(mp, 1), 0, &bp);
if (error)
return error;