From nobody Thu Apr 16 00:41:49 2026 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 65950C4332F for ; Tue, 22 Nov 2022 20:09:17 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S234603AbiKVUJP (ORCPT ); Tue, 22 Nov 2022 15:09:15 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:51022 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S234718AbiKVUJC (ORCPT ); Tue, 22 Nov 2022 15:09:02 -0500 Received: from mail-lj1-x232.google.com (mail-lj1-x232.google.com [IPv6:2a00:1450:4864:20::232]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id D7A5EAFE73 for ; Tue, 22 Nov 2022 12:08:55 -0800 (PST) Received: by mail-lj1-x232.google.com with SMTP id x21so19127860ljg.10 for ; Tue, 22 Nov 2022 12:08:55 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20210112; h=content-transfer-encoding:mime-version:message-id:date:subject:cc :to:from:from:to:cc:subject:date:message-id:reply-to; bh=sXUW0a6Ff8psj/R6aZYguKr5STKCT04i6o2Czkyr1nI=; b=cl6HAHsy3tjvvd4e4yK9SmzUE3tr+Gk6oNXpZw1qroE9OvLHrPAkJ7i2yJ+gyYrynr 3nX7GZat+e7v8Oj4Vj5/OxigiF2xNhYpwoB+U5NNn6egDKIc+cDavlJAOsqJirmlSJEa nVIVPLrOE00b08L3kFOA5w2X1R8VJ1YNfdJlvEzThE9ofWGO8evDtb9tN7+pK5o/qBYu Kj+VbqfXpOdWcrsoELjgX75ZRqLsxHvx/bcIjL7YNio+fE6TubHnAZa4g41q3X66KGO1 QM7EW+XeC2wdPzk5axmFu5e1KNzER+wDJcPqEz9RNjVlMDLBChG0M8HeYiugMbbUqklA CAWg== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; h=content-transfer-encoding:mime-version:message-id:date:subject:cc :to:from:x-gm-message-state:from:to:cc:subject:date:message-id :reply-to; bh=sXUW0a6Ff8psj/R6aZYguKr5STKCT04i6o2Czkyr1nI=; b=p72AbCs3okB7HpNaWnA8c29oOkeJIrlit/u6JE/v59ob8U9D9y3eneQbhn1nyMQReW QkpLkaVjO6xFCxUMtTzdYAsh7fXWPJ6woaD9t5de5hrKDSHhUpeHTKdMey1b2aM0i5Kx t7bCNLvSPp2Qouh5m2WmxvM00/hyTdQa3ti2gdLEEIHdbgOevdjI1rUNOjqc3Fq2LRAb 7IH/u1gB3l6lC1GKux2PoFMQMEcEdprrVHoqqmVk48YV6asMWeiRUTbE92lxQ4zHSJ8L AC0L+5LrH78iY1Ad6ZFj9ibPm2MI3srA6ImyLv/rwHL/8CGzgVtiNZGdY/BkpiWGTWXT /vqg== X-Gm-Message-State: ANoB5pk2ucz9I51cwT7l/NZsXXHlWH55In3MNpBqMhYsNCJ5b8HxMbuz amXFvE16yVno3TUvp4PbmNLOvsl2Y8DOXWdy X-Google-Smtp-Source: AA0mqf7+Auws5Fe5VM1larsYdpz+GpM8nruuKW0Ba5lB/mRlJZvW4hmmdtILhMBj0v/rBA9j/qikLQ== X-Received: by 2002:a2e:be04:0:b0:267:9d30:5ba with SMTP id z4-20020a2ebe04000000b002679d3005bamr7874525ljq.284.1669147734075; Tue, 22 Nov 2022 12:08:54 -0800 (PST) Received: from localhost.localdomain ([2.56.241.21]) by smtp.gmail.com with ESMTPSA id z19-20020a056512371300b004b4e6dab30esm59977lfr.222.2022.11.22.12.08.50 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Tue, 22 Nov 2022 12:08:53 -0800 (PST) From: Xiaolong Huang To: perex@perex.cz, tiwai@suse.com Cc: alsa-devel@alsa-project.org, linux-kernel@vger.kernel.org, Xiaolong Huang Subject: [PATCH] ALSA: rawmidi: fix infoleak in snd_rawmidi_ioctl_status_compat64 Date: Wed, 23 Nov 2022 04:08:41 +0800 Message-Id: <20221122200841.1026335-1-butterflyhuangxx@gmail.com> X-Mailer: git-send-email 2.25.1 MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Type: text/plain; charset="utf-8" The compat_status is declared off of the stack, so it needs to be zeroed out before copied back to userspace to prevent any unintentional data leakage. Signed-off-by: Xiaolong Huang --- sound/core/rawmidi_compat.c | 1 + 1 file changed, 1 insertion(+) diff --git a/sound/core/rawmidi_compat.c b/sound/core/rawmidi_compat.c index 68a93443583c..6afa68165b17 100644 --- a/sound/core/rawmidi_compat.c +++ b/sound/core/rawmidi_compat.c @@ -80,6 +80,7 @@ static int snd_rawmidi_ioctl_status_compat64(struct snd_r= awmidi_file *rfile, if (err < 0) return err; =20 + memset(&compat_status, 0, sizeof(compat_status)); compat_status =3D (struct compat_snd_rawmidi_status64) { .stream =3D status.stream, .tstamp_sec =3D status.tstamp_sec, base-commit: eb7081409f94a9a8608593d0fb63a1aa3d6f95d8 --=20 2.25.1