From patchwork Fri Oct 14 02:16:49 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: "Jason A. Donenfeld" X-Patchwork-Id: 13006593 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from lists.gnu.org (lists.gnu.org [209.51.188.17]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id 5EB8CC4332F for ; Fri, 14 Oct 2022 02:21:01 +0000 (UTC) Received: from localhost ([::1]:34310 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1ojAJo-0000C4-EU for qemu-devel@archiver.kernel.org; Thu, 13 Oct 2022 22:21:00 -0400 Received: from eggs.gnu.org ([2001:470:142:3::10]:41594) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1ojAGA-0000Sj-6V; Thu, 13 Oct 2022 22:17:14 -0400 Received: from ams.source.kernel.org ([2604:1380:4601:e00::1]:50472) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1ojAG7-0001g0-RB; Thu, 13 Oct 2022 22:17:13 -0400 Received: from smtp.kernel.org (relay.kernel.org [52.25.139.140]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by ams.source.kernel.org (Postfix) with ESMTPS id 13DE9B81E62; Fri, 14 Oct 2022 02:17:10 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 38A76C433C1; Fri, 14 Oct 2022 02:17:08 +0000 (UTC) Authentication-Results: smtp.kernel.org; dkim=pass (1024-bit key) header.d=zx2c4.com header.i=@zx2c4.com header.b="DMEGeeOI" DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=zx2c4.com; s=20210105; t=1665713827; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=E2tG8cg6i15BnKVQ+qgoskEv5SSmzm+WVuAWGWXUmbE=; b=DMEGeeOIy7G075FvU1Cc3icWBzfRZNIuEXefHqoTU/aLG4JdfvZEYjxtILn8TAYDHy/0Qm 4N0/02lmr8/g96Rbbi9kqQIIB9RIkjvFX32Qr1EKmBHJ11/2677HLmOVDVC4P9wILDpLrn 3iE7Djst5GUiODYjSsX2386wQIINAxU= Received: by mail.zx2c4.com (ZX2C4 Mail Server) with ESMTPSA id 84f6c79b (TLSv1.3:TLS_AES_256_GCM_SHA384:256:NO); Fri, 14 Oct 2022 02:17:06 +0000 (UTC) From: "Jason A. Donenfeld" To: peter.maydell@linaro.org, pbonzini@redhat.com, qemu-devel@nongnu.org, richard.henderson@linaro.org Cc: "Jason A. Donenfeld" , qemu-arm@nongnu.org Subject: [PATCH v3 4/8] arm: re-randomize rng-seed on reboot Date: Thu, 13 Oct 2022 20:16:49 -0600 Message-Id: <20221014021653.1461512-5-Jason@zx2c4.com> In-Reply-To: <20221014021653.1461512-1-Jason@zx2c4.com> References: <20221014021653.1461512-1-Jason@zx2c4.com> MIME-Version: 1.0 Received-SPF: pass client-ip=2604:1380:4601:e00::1; envelope-from=SRS0=NTzD=2P=zx2c4.com=Jason@kernel.org; helo=ams.source.kernel.org X-Spam_score_int: -67 X-Spam_score: -6.8 X-Spam_bar: ------ X-Spam_report: (-6.8 / 5.0 requ) BAYES_00=-1.9, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, HEADER_FROM_DIFFERENT_DOMAINS=0.25, RCVD_IN_DNSWL_HI=-5, SPF_HELO_NONE=0.001, SPF_PASS=-0.001 autolearn=ham autolearn_force=no X-Spam_action: no action X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Sender: "Qemu-devel" When the system reboots, the rng-seed that the FDT has should be re-randomized, so that the new boot gets a new seed. Since the FDT is in the ROM region at this point, we add a hook right after the ROM has been added, so that we have a pointer to that copy of the FDT. Cc: Peter Maydell Cc: qemu-arm@nongnu.org Signed-off-by: Jason A. Donenfeld --- hw/arm/boot.c | 2 ++ 1 file changed, 2 insertions(+) diff --git a/hw/arm/boot.c b/hw/arm/boot.c index ada2717f76..511f7b22b1 100644 --- a/hw/arm/boot.c +++ b/hw/arm/boot.c @@ -683,6 +683,8 @@ int arm_load_dtb(hwaddr addr, const struct arm_boot_info *binfo, * the DTB is copied again upon reset, even if addr points into RAM. */ rom_add_blob_fixed_as("dtb", fdt, size, addr, as); + qemu_register_reset_nosnapshotload(qemu_fdt_randomize_seeds, + rom_ptr_for_as(as, addr, size)); g_free(fdt);