From f1c63b73cf60dc4800cde5ce7fd9466c419e5e36 Mon Sep 17 00:00:00 2001 From: Christoph Hellwig Date: Wed, 11 May 2011 15:04:09 +0000 Subject: [PATCH] xfs: do not do pointer arithmetic on extent records We need to call xfs_iext_get_ext for the previous extent to get a valid pointer, and can't just do pointer arithmetics as they might be in different pages. Signed-off-by: Christoph Hellwig Reviewed-by: Lachlan McIlroy Signed-off-by: Alex Elder --- fs/xfs/xfs_bmap.c | 9 ++++++--- 1 file changed, 6 insertions(+), 3 deletions(-) diff --git a/fs/xfs/xfs_bmap.c b/fs/xfs/xfs_bmap.c index ebcd45203c3d..896e16f08ed9 100644 --- a/fs/xfs/xfs_bmap.c +++ b/fs/xfs/xfs_bmap.c @@ -5143,9 +5143,12 @@ xfs_bunmapi( */ ASSERT(bno >= del.br_blockcount); bno -= del.br_blockcount; - if (bno < got.br_startoff) { - if (--lastx >= 0) - xfs_bmbt_get_all(--ep, &got); + if (got.br_startoff > bno) { + if (--lastx >= 0) { + ep = xfs_iext_get_ext(ifp, + lastx); + xfs_bmbt_get_all(ep, &got); + } } continue; } else if (del.br_state == XFS_EXT_UNWRITTEN) { -- 2.39.5