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authorDavid Chinner <dgc@sgi.com>2007-06-05 16:24:15 +1000
committerTim Shimmin <tes@chook.melbourne.sgi.com>2007-07-14 15:29:37 +1000
commit4e5ae8386b55677bde05bbd38b8fc82c67ad4564 (patch)
treeeb28b9003453d55c21b81da63ce1fb4a897023ed /fs/xfs
parent210c6f1caa451623e14a7cd71000d2c2e0d9cc43 (diff)
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[XFS] xfs_bmapi fails to update the previous extent pointer
When processing multiple extent maps, xfs_bmapi needs to keep track of the extent behind the one it is currently working on to be able to trim extent ranges correctly. Failing to update the previous pointer can result in corrupted extent lists in memory and this will result in panics or assert failures. Update the previous pointer correctly when we move to the next extent to process. SGI-PV: 965631 SGI-Modid: xfs-linux-melb:xfs-kern:28773a Signed-off-by: David Chinner <dgc@sgi.com> Signed-off-by: Vlad Apostolov <vapo@sgi.com> Signed-off-by: Tim Shimmin <tes@sgi.com>
Diffstat (limited to 'fs/xfs')
-rw-r--r--fs/xfs/xfs_bmap.c6
1 files changed, 3 insertions, 3 deletions
diff --git a/fs/xfs/xfs_bmap.c b/fs/xfs/xfs_bmap.c
index b1ea26e40aa..9a654faf0c0 100644
--- a/fs/xfs/xfs_bmap.c
+++ b/fs/xfs/xfs_bmap.c
@@ -5219,10 +5219,10 @@ xfs_bmapi(
* Else go on to the next record.
*/
ep = xfs_iext_get_ext(ifp, ++lastx);
- if (lastx >= nextents) {
+ prev = got;
+ if (lastx >= nextents)
eof = 1;
- prev = got;
- } else
+ else
xfs_bmbt_get_all(ep, &got);
}
ifp->if_lastex = lastx;