From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-alma10-1.taild15c8.ts.net [100.103.45.18]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id D0A9A3B1034; Tue, 21 Jul 2026 20:34:39 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=100.103.45.18 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1784666080; cv=none; b=OsreKvHmcXFXolttw8KECbYwg5yKrxCBYzGOkyM0UXOF4qFonOI9s497OiMuK5ab+IHPSij4ey3So0PTAiVHceDSjL+vt2ocNWDHmYc1NJIeKzZhoW1wTdjWPqyS+IhVcFeNKZv+auVPoZc1hjTrOz1AKTQLaUHuGVO0D2rMO4U= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1784666080; c=relaxed/simple; bh=L1uOlmjHLP/nh+54Rftp29xXKmHPCs1lklxc35mX/4o=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=Hbkw0T+zdLQcELJrmZa693Lvw+/crGJK2ReNR2W0Fp7vGXmZqCT3Vj5ys7FRLLiEfezE1AS7HzHMsovS+ExlpkK6UzM3a2XlOwrnQATGNyERjrS9SwG2i2wgpWQnYFG6h3d7yHB2fAv0qhY03nDuYjQLJRWaBMcbhYIpr1TTl7g= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b=HpXTAIRl; arc=none smtp.client-ip=100.103.45.18 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b="HpXTAIRl" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 427211F000E9; Tue, 21 Jul 2026 20:34:39 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linuxfoundation.org; s=korg; t=1784666079; bh=5a1Uno7eBu59z6Sd/8Z63y22IKYiwCKZNHeaEmRAi4A=; h=From:To:Cc:Subject:Date:In-Reply-To:References; b=HpXTAIRlPPFWT09v6iVvhQJhg584c/U/Cg34p5mam9BaavVHFrW6d3Z1tEkTenqiB GYEDQWH82gteHFzQA5kNoeZkKHmbnPtngsTACCEqFKMRIJRwa2yv9gPxChBMlbNPow K8/4sEFM5HY9jmozHqyzPgtRJBhYN7ELWZ8qY1lg= From: Greg Kroah-Hartman To: stable@vger.kernel.org Cc: Greg Kroah-Hartman , patches@lists.linux.dev, Alison Schofield , Dave Jiang , Sasha Levin Subject: [PATCH 6.6 0545/1266] cxl/test: Zero out LSA backing memory to avoid leaking to user Date: Tue, 21 Jul 2026 17:16:22 +0200 Message-ID: <20260721152454.061577087@linuxfoundation.org> X-Mailer: git-send-email 2.55.0 In-Reply-To: <20260721152441.786066624@linuxfoundation.org> References: <20260721152441.786066624@linuxfoundation.org> User-Agent: quilt/0.69 X-stable: review X-Patchwork-Hint: ignore Precedence: bulk X-Mailing-List: patches@lists.linux.dev List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit 6.6-stable review patch. If anyone has any objections, please let me know. ------------------ From: Dave Jiang [ Upstream commit 60f065dbaf46e65830da62a0041761f0c039e086 ] Memory through vmalloc() is not zeroed out. When this memory is copied into output payload, it leaks memory content to user. Use vzalloc() instead to zero out the memory. Suggested-by: sashiko-bot Link: https://lore.kernel.org/linux-cxl/20260605173146.2B9A31F00893@smtp.kernel.org/ Fixes: 7d3eb23c4ccf ("tools/testing/cxl: Introduce a mock memory device + driver") Reviewed-by: Alison Schofield Link: https://patch.msgid.link/20260605184426.4070913-1-dave.jiang@intel.com Signed-off-by: Dave Jiang Signed-off-by: Sasha Levin --- tools/testing/cxl/test/mem.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/tools/testing/cxl/test/mem.c b/tools/testing/cxl/test/mem.c index 6d4ffcce326dff..718f943ab3570f 100644 --- a/tools/testing/cxl/test/mem.c +++ b/tools/testing/cxl/test/mem.c @@ -1396,7 +1396,7 @@ static int cxl_mock_mem_probe(struct platform_device *pdev) return -ENOMEM; dev_set_drvdata(dev, mdata); - mdata->lsa = vmalloc(LSA_SIZE); + mdata->lsa = vzalloc(LSA_SIZE); if (!mdata->lsa) return -ENOMEM; mdata->fw = vmalloc(FW_SIZE); -- 2.53.0