From: Darrick J. Wong <darrick.w...@oracle.com>
[ Upstream commit c142932c29e533ee892f87b44d8abc5719edceec ]
In the reflink extent remap function, it turns out that uirec (the block
mapping corresponding only to the part of the passed-in mapping that got
unmapped) was not fully initialized. Specifically, br_state was not
being copied from the passed-in struct to the uirec. This could lead to
unpredictable results such as the reflinked mapping being marked
unwritten in the destination file.
Signed-off-by: Darrick J. Wong <darrick.w...@oracle.com>
Reviewed-by: Brian Foster <bfos...@redhat.com>
Signed-off-by: Sasha Levin <sas...@kernel.org>
---
fs/xfs/xfs_reflink.c | 1 +
1 file changed, 1 insertion(+)
diff --git a/fs/xfs/xfs_reflink.c b/fs/xfs/xfs_reflink.c
index 17d3c964a2a23..6b753b969f7b8 100644
--- a/fs/xfs/xfs_reflink.c
+++ b/fs/xfs/xfs_reflink.c
@@ -1162,6 +1162,7 @@ xfs_reflink_remap_extent(
uirec.br_startblock = irec->br_startblock + rlen;
uirec.br_startoff = irec->br_startoff + rlen;
uirec.br_blockcount = unmap_len - rlen;
+ uirec.br_state = irec->br_state;
unmap_len = rlen;
/* If this isn't a real mapping, we're done. */
--
2.20.1
