diff options
| author | Christoph Hellwig <hch@infradead.org> | 2011-05-11 15:04:07 +0000 |
|---|---|---|
| committer | Alex Elder <aelder@sgi.com> | 2011-05-25 10:48:37 -0500 |
| commit | 5690f92199956c0f2a2d9f718b5031e1300a1de1 (patch) | |
| tree | 66ae28ac9f0fe4deae3452f81f244ae162a25fcb /fs/xfs | |
| parent | 2f2b3220b0566692da14e06ea5fc0d697a78dc7c (diff) | |
| download | lwn-5690f92199956c0f2a2d9f718b5031e1300a1de1.tar.gz lwn-5690f92199956c0f2a2d9f718b5031e1300a1de1.zip | |
xfs: do not use unchecked extent indices in xfs_bmapi
Make sure to only call xfs_iext_get_ext after we've validate the
extent index when moving on to the next index in xfs_bmapi.
Based on an earlier patch from Lachlan McIlroy.
Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Lachlan McIlroy <lmcilroy@redhat.com>
Signed-off-by: Alex Elder <aelder@sgi.com>
Diffstat (limited to 'fs/xfs')
| -rw-r--r-- | fs/xfs/xfs_bmap.c | 9 |
1 files changed, 5 insertions, 4 deletions
diff --git a/fs/xfs/xfs_bmap.c b/fs/xfs/xfs_bmap.c index 130ec4fa5eaf..af655c1d460d 100644 --- a/fs/xfs/xfs_bmap.c +++ b/fs/xfs/xfs_bmap.c @@ -4825,12 +4825,13 @@ xfs_bmapi( /* * Else go on to the next record. */ - ep = xfs_iext_get_ext(ifp, ++lastx); prev = got; - if (lastx >= nextents) - eof = 1; - else + if (++lastx < nextents) { + ep = xfs_iext_get_ext(ifp, lastx); xfs_bmbt_get_all(ep, &got); + } else { + eof = 1; + } } *nmap = n; /* |