nfp: bpf: Use kmemdup_array instead of kmemdup for multiple allocation

Let the kememdup_array() take care about multiplication and possible
overflows.
Signed-off-by: Yu Jiaoliang <yujiaoliang@vivo.com>
Signed-off-by: Louis Peens <louis.peens@corigine.com>
Reviewed-by: Simon Horman <horms@kernel.org>
Link: https://patch.msgid.link/20240821081447.12430-1-yujiaoliang@vivo.comSigned-off-by: Paolo Abeni <pabeni@redhat.com>

drivers/net/ethernet/netronome/nfp/bpf/jit.c

@@ -4537,8 +4537,8 @@ void *nfp_bpf_relo_for_vnic(struct nfp_prog *nfp_prog, struct nfp_bpf_vnic *bv)
 	u64 *prog;
 	int err;
 
-	prog = kmemdup(nfp_prog->prog, nfp_prog->prog_len * sizeof(u64),
-		       GFP_KERNEL);
+	prog = kmemdup_array(nfp_prog->prog, nfp_prog->prog_len, sizeof(u64),
+			     GFP_KERNEL);
 	if (!prog)
 		return ERR_PTR(-ENOMEM);