From 4e5ae8386b55677bde05bbd38b8fc82c67ad4564 Mon Sep 17 00:00:00 2001 From: David Chinner Date: Tue, 5 Jun 2007 16:24:15 +1000 Subject: [PATCH] [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 Signed-off-by: Vlad Apostolov Signed-off-by: Tim Shimmin --- fs/xfs/xfs_bmap.c | 6 +++--- 1 file 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; -- 2.20.1