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[2620:137:e000::1:20]) by mx.google.com with ESMTP id hc12-20020a170907168c00b0078b6559a610si10779096ejc.12.2022.10.05.14.20.40; Wed, 05 Oct 2022 14:21:06 -0700 (PDT) Received-SPF: pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 2620:137:e000::1:20 as permitted sender) client-ip=2620:137:e000::1:20; Authentication-Results: mx.google.com; dkim=pass header.i=@google.com header.s=20210112 header.b=pMRkqZuA; spf=pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 2620:137:e000::1:20 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org; dmarc=pass (p=REJECT sp=REJECT dis=NONE) header.from=google.com Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S230352AbiJEUlK (ORCPT + 99 others); Wed, 5 Oct 2022 16:41:10 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:56538 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S231148AbiJEUlI (ORCPT ); Wed, 5 Oct 2022 16:41:08 -0400 Received: from mail-ed1-x532.google.com (mail-ed1-x532.google.com [IPv6:2a00:1450:4864:20::532]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 1CACF65674 for ; Wed, 5 Oct 2022 13:41:07 -0700 (PDT) Received: by mail-ed1-x532.google.com with SMTP id u21so129144edi.9 for ; Wed, 05 Oct 2022 13:41:07 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=20210112; h=cc:to:subject:message-id:date:from:in-reply-to:references :mime-version:from:to:cc:subject:date:message-id:reply-to; bh=wezMY0HcT+UXrF/Kp1mqgrelTmjrv48aVuFmQkT0QkM=; b=pMRkqZuA0XwgD1ltGokKvQ/xSa9jAL8/1q6ZYlVAdIz48r82ogNpa+9g+ARAOTz0xm QVsTbAqCecamtq6Rn1+jQJE8fdQklZzaJOTkX+iMZ0l2y0N5cRRTLNIUlzJU+BjwgRVZ SjKPpaDirLtUtwnJQg/PfqJvzasGa04p8Wcs7WnG3ItKuWX3RA4HkWBlxGBUkCkZok+k ENITADfYS53EvKj3Loc0kSfkkcv8K3YQs8ucD89brYvI0mieIzei8S6fnBBdCbsgmqEi oyrLqPZ0WzOmh0zLajlgbUTVdlV+UHtIPCaNKmtqoz9QFkR55ma6PrmspEgT78kUuhPq y5dg== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; h=cc:to:subject:message-id:date:from:in-reply-to:references :mime-version:x-gm-message-state:from:to:cc:subject:date:message-id :reply-to; bh=wezMY0HcT+UXrF/Kp1mqgrelTmjrv48aVuFmQkT0QkM=; b=gQaw+QN6CdEOYxUs8J6qNuEM0DV/GT+h7/dDkbd8xZP2yOG0i/qfEDcy5Pk7QDnlsB UlyyQ4eYRuHeQGJL8521+HNIYFYbekVOBzYRcIG9BnW0BserJiJcpxK6fKBAGfKy/lJG dSM83///K55l33e7S0iBR86rSWzG+s+84R/HS5wGfTpkG7ErQp5HE6Hh/azHaYv6tXse yiTjhGbMHBHSXONKppmIIwVhzEJcd0r6DmEIAxgvHGzOPf8t8OHdawEoybobvbHq5BVp yD3z+Z2Mgmgl/kipFP552kz/xGhfiRIqp8yJnbcAEKoqPAyXb5WyanbCGejBZxlk5tsZ vV4g== X-Gm-Message-State: ACrzQf1/XRBJkO579Ea2Nxiax4rESed63am/lgMkL2gE9fBErMSmlpXp g4Gfi2H3raiojzj5eYJLnTEb4tKfYbf3y+HpoAx70cPQQzrDkg== X-Received: by 2002:a05:6402:4310:b0:459:7806:8ee6 with SMTP id m16-20020a056402431000b0045978068ee6mr1504103edc.198.1665002465512; Wed, 05 Oct 2022 13:41:05 -0700 (PDT) MIME-Version: 1.0 References: <20220722171534.3576419-1-dlatypov@google.com> <20220722171534.3576419-5-dlatypov@google.com> In-Reply-To: <20220722171534.3576419-5-dlatypov@google.com> From: Brendan Higgins Date: Wed, 5 Oct 2022 16:40:54 -0400 Message-ID: Subject: Re: [PATCH v2 5/5] kunit: make kunit_kfree(NULL) a no-op to match kfree() To: Daniel Latypov Cc: davidgow@google.com, linux-kernel@vger.kernel.org, kunit-dev@googlegroups.com, linux-kselftest@vger.kernel.org, skhan@linuxfoundation.org Content-Type: text/plain; charset="UTF-8" X-Spam-Status: No, score=-17.6 required=5.0 tests=BAYES_00,DKIMWL_WL_MED, DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,DKIM_VALID_EF, ENV_AND_HDR_SPF_MATCH,RCVD_IN_DNSWL_NONE,SPF_HELO_NONE,SPF_PASS, USER_IN_DEF_DKIM_WL,USER_IN_DEF_SPF_WL autolearn=ham autolearn_force=no version=3.4.6 X-Spam-Checker-Version: SpamAssassin 3.4.6 (2021-04-09) on lindbergh.monkeyblade.net Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Fri, Jul 22, 2022 at 1:15 PM Daniel Latypov wrote: > > The real kfree() function will silently return when given a NULL. > So a user might reasonably think they can write the following code: > char *buffer = NULL; > if (param->use_buffer) buffer = kunit_kzalloc(test, 10, GFP_KERNEL); > ... > kunit_kfree(test, buffer); > > As-is, kunit_kfree() will mark the test as FAILED when buffer is NULL. > (And in earlier times, it would segfault). > > Let's match the semantics of kfree(). > > Suggested-by: David Gow > Signed-off-by: Daniel Latypov Reviewed-by: Brendan Higgins