diff --git a/fs/ksmbd/smb2pdu.c b/fs/ksmbd/smb2pdu.c
index 86b1fb43104e..57f59172d821 100644
--- a/fs/ksmbd/smb2pdu.c
+++ b/fs/ksmbd/smb2pdu.c
@@ -536,6 +536,10 @@ int smb2_allocate_rsp_buf(struct ksmbd_work *work)
 	if (cmd == SMB2_QUERY_INFO_HE) {
 		struct smb2_query_info_req *req;
 
+		if (get_rfc1002_len(work->request_buf) <
+		    offsetof(struct smb2_query_info_req, OutputBufferLength))
+			return -EINVAL;
+
 		req = smb2_get_msg(work->request_buf);
 		if ((req->InfoType == SMB2_O_INFO_FILE &&
 		     (req->FileInfoClass == FILE_FULL_EA_INFORMATION ||