From nobody Wed Sep 17 14:12:39 2025 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 vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 60129C4332F for ; Mon, 19 Dec 2022 02:18:52 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S230512AbiLSCSk (ORCPT ); Sun, 18 Dec 2022 21:18:40 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:52164 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229537AbiLSCSa (ORCPT ); Sun, 18 Dec 2022 21:18:30 -0500 Received: from mail.nfschina.com (mail.nfschina.com [124.16.136.209]) by lindbergh.monkeyblade.net (Postfix) with ESMTP id 6BC47636B for ; Sun, 18 Dec 2022 18:18:29 -0800 (PST) Received: from localhost (unknown [127.0.0.1]) by mail.nfschina.com (Postfix) with ESMTP id B3FFF1E80D6D; Mon, 19 Dec 2022 10:13:31 +0800 (CST) X-Virus-Scanned: amavisd-new at test.com Received: from mail.nfschina.com ([127.0.0.1]) by localhost (mail.nfschina.com [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id agkulhGKmcTu; Mon, 19 Dec 2022 10:13:29 +0800 (CST) Received: from localhost.localdomain (unknown [219.141.250.2]) (Authenticated sender: zeming@nfschina.com) by mail.nfschina.com (Postfix) with ESMTPA id ED2C01E80D32; Mon, 19 Dec 2022 10:13:28 +0800 (CST) From: Li zeming To: mpe@ellerman.id.au, npiggin@gmail.com, christophe.leroy@csgroup.eu, gregkh@linuxfoundation.org Cc: linuxppc-dev@lists.ozlabs.org, linux-kernel@vger.kernel.org, Li zeming Subject: [PATCH] boot: simple_alloc: check after increasing memory allocation Date: Mon, 19 Dec 2022 10:18:16 +0800 Message-Id: <20221219021816.3012-1-zeming@nfschina.com> X-Mailer: git-send-email 2.18.2 Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Transfer-Encoding: quoted-printable MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" The pointer new adds judgment and should help with program robustness. Signed-off-by: Li zeming --- arch/powerpc/boot/simple_alloc.c | 4 +++- 1 file changed, 3 insertions(+), 1 deletion(-) diff --git a/arch/powerpc/boot/simple_alloc.c b/arch/powerpc/boot/simple_al= loc.c index 267d6524caac..db9aaa5face3 100644 --- a/arch/powerpc/boot/simple_alloc.c +++ b/arch/powerpc/boot/simple_alloc.c @@ -112,7 +112,9 @@ static void *simple_realloc(void *ptr, unsigned long si= ze) return ptr; =20 new =3D simple_malloc(size); - memcpy(new, ptr, p->size); + if (new) + memcpy(new, ptr, p->size); + simple_free(ptr); return new; } --=20 2.18.2