diff --git a/smb2pdu.c b/smb2pdu.c
index 2b70e5a48..dd4c5c048 100644
--- a/smb2pdu.c
+++ b/smb2pdu.c
@@ -7422,6 +7422,8 @@ int smb2_write(struct ksmbd_work *work)
 	}
 
 	offset = le64_to_cpu(req->Offset);
+	if (offset < 0)
+		return -EINVAL;
 	length = le32_to_cpu(req->Length);
 
 	if (req->Channel == SMB2_CHANNEL_RDMA_V1 ||