[PATCH] hfs: propagate extent B-tree insertion errors

[Davy Felipe <davyfelipe34@gmail.com>]

hfs_brec_insert() may fail while inserting a new extent record, but
__hfs_ext_write_extent() currently ignores its return value and clears
HFS_FLG_EXT_DIRTY and HFS_FLG_EXT_NEW as if the insertion had
succeeded.

Propagate the error returned by hfs_brec_insert() and only clear the
extent flags after a successful insertion.

Fault injection of -EIO into the extent B-tree insertion path confirmed
that __hfs_ext_write_extent() returned success despite the insertion
failure. With the error propagated, the failure is returned to the
caller instead.

Signed-off-by: Davy Felipe <davyfelipe34@gmail.com>
---
 fs/hfs/extent.c | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/fs/hfs/extent.c b/fs/hfs/extent.c
index f066a99a863b..77ba0f63fcb9 100644
--- a/fs/hfs/extent.c
+++ b/fs/hfs/extent.c
@@ -121,7 +121,10 @@ static int __hfs_ext_write_extent(struct inode *inode, struct hfs_find_data *fd)
 		res = hfs_bmap_reserve(fd->tree, fd->tree->depth + 1);
 		if (res)
 			return res;
-		hfs_brec_insert(fd, HFS_I(inode)->cached_extents, sizeof(hfs_extent_rec));
+		res = hfs_brec_insert(fd, HFS_I(inode)->cached_extents,
+				      sizeof(hfs_extent_rec));
+		if (res)
+			return res;
 		HFS_I(inode)->flags &= ~(HFS_FLG_EXT_DIRTY|HFS_FLG_EXT_NEW);
 	} else {
 		if (res)
-- 
2.55.0