[PATCH 2/2] ksmbd: fix unexpectedly changed path in ksmbd_vfs_kern_path_locked

[He Wang <xw897002528@gmail.com>]

When `ksmbd_vfs_kern_path_locked` met an error and it is not the last
entry, it will exit without restoring changed path buffer. But later this
buffer may be used as the filename for creation.

Signed-off-by: He Wang <xw897002528@gmail.com>
---
 fs/smb/server/vfs.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/fs/smb/server/vfs.c b/fs/smb/server/vfs.c
index 88d167a5f..40f08eac5 100644
--- a/fs/smb/server/vfs.c
+++ b/fs/smb/server/vfs.c
@@ -1264,6 +1264,8 @@ int ksmbd_vfs_kern_path_locked(struct ksmbd_work *work, char *name,
 					      filepath,
 					      flags,
 					      path);
+			if (!is_last)
+				next[0] = '/';
 			if (err)
 				goto out2;
 			else if (is_last)
@@ -1271,7 +1273,6 @@ int ksmbd_vfs_kern_path_locked(struct ksmbd_work *work, char *name,
 			path_put(parent_path);
 			*parent_path = *path;
 
-			next[0] = '/';
 			remain_len -= filename_len + 1;
 		}
 
-- 
2.46.2