In nilfs_direct_propagate(), the printer get from nilfs_direct_get_ptr()
need to be checked to ensure it is not an invalid pointer. A proper
implementation can be found in nilfs_direct_delete(). Add a value check
and return -ENOENT when it is an invalid pointer.
Fixes: 10ff885ba6f5 ("nilfs2: get rid of nilfs_direct uses")
Cc: stable@xxxxxxxxxxxxxxx # v2.6+
Signed-off-by: Wentao Liang <vulab@xxxxxxxxxxx>
---
fs/nilfs2/direct.c | 3 +++
1 file changed, 3 insertions(+)
diff --git a/fs/nilfs2/direct.c b/fs/nilfs2/direct.c
index 893ab36824cc..ff1c9fe72bec 100644
--- a/fs/nilfs2/direct.c
+++ b/fs/nilfs2/direct.c
@@ -273,6 +273,9 @@ static int nilfs_direct_propagate(struct nilfs_bmap *bmap,
dat = nilfs_bmap_get_dat(bmap);
key = nilfs_bmap_data_get_key(bmap, bh);
ptr = nilfs_direct_get_ptr(bmap, key);
+ if (ptr == NILFS_BMAP_INVALID_PTR)
+ return -ENOENT;
+
if (!buffer_nilfs_volatile(bh)) {
oldreq.pr_entry_nr = ptr;
newreq.pr_entry_nr = ptr;
--
2.42.0.windows.2
