From mboxrd@z Thu Jan 1 00:00:00 1970 Delivery-date: Tue, 22 Apr 2025 10:37:23 +0200 Received: from metis.whiteo.stw.pengutronix.de ([2a0a:edc0:2:b01:1d::104]) by lore.white.stw.pengutronix.de with esmtps (TLS1.3) tls TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384 (Exim 4.96) (envelope-from ) id 1u7987-003yS7-0a for lore@lore.pengutronix.de; Tue, 22 Apr 2025 10:37:23 +0200 Received: from bombadil.infradead.org ([2607:7c80:54:3::133]) by metis.whiteo.stw.pengutronix.de with esmtps (TLS1.3:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.92) (envelope-from ) id 1u7986-0000fc-I6 for lore@pengutronix.de; Tue, 22 Apr 2025 10:37:23 +0200 DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender:List-Subscribe:List-Help :List-Post:List-Archive:List-Unsubscribe:List-Id:Content-Transfer-Encoding: Content-Type:MIME-Version:Date:Message-Id:Subject:References:In-Reply-To:To: From:Reply-To:Cc:Content-ID:Content-Description:Resent-Date:Resent-From: Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID:List-Owner; bh=RC9+3u+EYQpDp3jTGLXwxCPwQmcmOuyPthe62HjjU/I=; b=Ua+RCBUwbAKJz6L6o3x+zgXuUS MVtOtaW0BJ9zqaMPjn1a43YTGAnOE9o+1/6BseuSqTyLx2yJMqycm+/Er8yJicLj6NUFjT/M/DAOh QPRgrVzviRkXwTj5HUEauTOMTgL+R0AN/pyAPZy5++yCJEolIuG61tbk0ww4xhyhQCx+wHHtL6NHZ VwGzzyJQlwBW6o0Lys2eEWs2wm08DJoodf2TgqjxMZ0TX2dLCzpoWbWnAuFTx1JWYigXB7nAD6cl7 x+J0hkrKlePay8j0ZKqBTucmWr8u0GVTGNX0oLE2pN+rWYe4v7sbv+FWHC6+mwsu+tBqJazZ2YoE/ N7YxLy/g==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.98.2 #2 (Red Hat Linux)) id 1u797h-00000006LQ0-0gKP; Tue, 22 Apr 2025 08:36:57 +0000 Received: from metis.whiteo.stw.pengutronix.de ([2a0a:edc0:2:b01:1d::104]) by bombadil.infradead.org with esmtps (Exim 4.98.2 #2 (Red Hat Linux)) id 1u78Ls-00000006Afj-2Hsq for barebox@lists.infradead.org; Tue, 22 Apr 2025 07:47:33 +0000 Received: from drehscheibe.grey.stw.pengutronix.de ([2a0a:edc0:0:c01:1d::a2]) by metis.whiteo.stw.pengutronix.de with esmtps (TLS1.3:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.92) (envelope-from ) id 1u78Lr-0007Vl-2H; Tue, 22 Apr 2025 09:47:31 +0200 Received: from dude02.red.stw.pengutronix.de ([2a0a:edc0:0:1101:1d::28]) by drehscheibe.grey.stw.pengutronix.de with esmtps (TLS1.3) tls TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384 (Exim 4.96) (envelope-from ) id 1u78Lq-001VuI-2p; Tue, 22 Apr 2025 09:47:30 +0200 Received: from localhost ([::1] helo=dude02.red.stw.pengutronix.de) by dude02.red.stw.pengutronix.de with esmtp (Exim 4.96) (envelope-from ) id 1u78Lq-00CYv0-2c; Tue, 22 Apr 2025 09:47:30 +0200 From: Sascha Hauer To: barebox@lists.infradead.org, Ahmad Fatoum In-Reply-To: <20250422053740.3436389-1-a.fatoum@pengutronix.de> References: <20250422053740.3436389-1-a.fatoum@pengutronix.de> Message-Id: <174530805080.2994153.4403549115894982173.b4-ty@pengutronix.de> Date: Tue, 22 Apr 2025 09:47:30 +0200 MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: 7bit X-Mailer: b4 0.12.3 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20250422_004732_588174_0DF8A8C1 X-CRM114-Status: UNSURE ( 7.62 ) X-CRM114-Notice: Please train this message. X-BeenThere: barebox@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "barebox" X-SA-Exim-Connect-IP: 2607:7c80:54:3::133 X-SA-Exim-Mail-From: barebox-bounces+lore=pengutronix.de@lists.infradead.org X-Spam-Checker-Version: SpamAssassin 3.4.2 (2018-09-13) on metis.whiteo.stw.pengutronix.de X-Spam-Level: X-Spam-Status: No, score=-5.4 required=4.0 tests=AWL,BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,HEADER_FROM_DIFFERENT_DOMAINS, MAILING_LIST_MULTI,RCVD_IN_DNSWL_MED,SPF_HELO_NONE,SPF_NONE autolearn=unavailable autolearn_force=no version=3.4.2 Subject: Re: [PATCH master 1/2] tlsf: hardening: unpoison trailing padding before zeroing it X-SA-Exim-Version: 4.2.1 (built Wed, 08 May 2019 21:11:16 +0000) X-SA-Exim-Scanned: Yes (on metis.whiteo.stw.pengutronix.de) On Tue, 22 Apr 2025 07:37:39 +0200, Ahmad Fatoum wrote: > The actual allocated buffer size can be bigger than what was requested > due to alignment. > > When KASAN is enabled, only the requested size is unpoisoned. > This currently leads to problems, because with > CONFIG_INIT_ON_ALLOC_DEFAULT_ON enabled, the whole allocated > buffer will be zeroed. > > [...] Applied, thanks! [1/2] tlsf: hardening: unpoison trailing padding before zeroing it https://git.pengutronix.de/cgit/barebox/commit/?id=bad633c5392d (link may not be stable) [2/2] tlsf: hardening: skip KASAN checks when zeroing memory https://git.pengutronix.de/cgit/barebox/commit/?id=d5c5e18f0dfe (link may not be stable) Best regards, -- Sascha Hauer