From patchwork Tue Dec 14 15:25:30 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Miaoqian Lin X-Patchwork-Id: 525039 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 alsa0.perex.cz (alsa0.perex.cz [77.48.224.243]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id 6C505C433EF for ; Tue, 14 Dec 2021 15:26:43 +0000 (UTC) Received: from alsa1.perex.cz (alsa1.perex.cz [207.180.221.201]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by alsa0.perex.cz (Postfix) with ESMTPS id 34B811908; Tue, 14 Dec 2021 16:25:51 +0100 (CET) DKIM-Filter: OpenDKIM Filter v2.11.0 alsa0.perex.cz 34B811908 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=alsa-project.org; s=default; t=1639495601; bh=foecpuw7diB29IKFjNJPm22yJCq6EUooJb9nl5daOCc=; h=From:To:Subject:Date:Cc:List-Id:List-Unsubscribe:List-Archive: List-Post:List-Help:List-Subscribe:From; b=KJ44Dz2ii827Zv2+yh1hioW8rUZ4DcSApddSMo5imKwlQKWm4b13DqSBIqSrz4dg5 rgjHgeQSXaTrzOlQvgIp4JVjj+f4dgi/1qXe5yBYaYjHmy6KT6Gl9+RY795a6kbgpR fk6MdGDzElUHwylD3+lRaWHwh8Bu0bRzEPvF+osA= Received: from alsa1.perex.cz (localhost.localdomain [127.0.0.1]) by alsa1.perex.cz (Postfix) with ESMTP id B8E1DF801EC; Tue, 14 Dec 2021 16:25:50 +0100 (CET) Received: by alsa1.perex.cz (Postfix, from userid 50401) id 80107F80246; Tue, 14 Dec 2021 16:25:47 +0100 (CET) Received: from mail-pj1-x102d.google.com (mail-pj1-x102d.google.com [IPv6:2607:f8b0:4864:20::102d]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by alsa1.perex.cz (Postfix) with ESMTPS id EB954F800FE for ; Tue, 14 Dec 2021 16:25:39 +0100 (CET) DKIM-Filter: OpenDKIM Filter v2.11.0 alsa1.perex.cz EB954F800FE Authentication-Results: alsa1.perex.cz; dkim=pass (2048-bit key) header.d=gmail.com header.i=@gmail.com header.b="ofJ4teTi" Received: by mail-pj1-x102d.google.com with SMTP id h24so14578592pjq.2 for ; Tue, 14 Dec 2021 07:25:39 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20210112; h=from:to:cc:subject:date:message-id; bh=Vm1Fqs6tdlQlqFRvByXD9ZZ5ex3zALshKcVnK+T6aeE=; b=ofJ4teTiF+PAhd90t9KU1GXvhu3kCeT87aeJAZV+EgB5ABSkMMVeikE32eklERyxXJ plpbdFGxS98zl88Fv+fOD6GaqzxN2upiKJBSOmY73fsBPCp7r0hkMBld+zzkJx6gSAyh +sAsranIVKeSbl3ZfSu2RfTO90Pw6NgC0qhoXvc+qkl3MQSMAKYRvnsG7hqksSZ8bgIm QeN15HSpxht6QtDc3yace2C3nzSq5yy4WLgK5SViEPOKCQAf3dBJE0yBynhx0WeZxNKP DVO256ES3/2nmf9vzPtcL2PWGfyHUWLVfTUtYpr4/czUEj/xMDEUfVSjxuVxtdBOEEh/ JBNA== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; h=x-gm-message-state:from:to:cc:subject:date:message-id; bh=Vm1Fqs6tdlQlqFRvByXD9ZZ5ex3zALshKcVnK+T6aeE=; b=qJVYrFc4YtA893yDyf7Ojls1b9OhjsBVEKaxU/DDHU4qH6lK4H0RuXw9p7sWr0qGkC q0rfh+6dBWNWrlQ+MHCXXRUGrul95TT+w/JAufSmZ3mZicDptPzC2I6mfxRrRfMGKXTv HWoyLJ3oDhAE9ebR5wWClzhmMgwqKQZSm7C+pCGfz4S+0uJPeN2pfYI+JbzsB78GBeyu PtcSnE3H4btwP0JpWQ5WZN+H8wPNNvvTaK5dxN1CC7jLNwtDQVjYcy3mYyacXQmp7m5Q nhhCruiUI2PwqRp9wHl9nV8ZhbLP2uQVGuBI4DVqwxx+0jPpQNsvmSvum2aUN/b8rnjS NU7Q== X-Gm-Message-State: AOAM533++PPJQoBJJH3SSdJYwsdPgfpiZUd5yXtVDWMITN2pTejEYQKO sV1xlz43iMkZ7g0L2qAA838= X-Google-Smtp-Source: ABdhPJzu4M87hrW+1Y/9HZnnji6CqtIbx+N0tmAsFOXR2FraebwN2EVZQUi00br1VjVj7nJY62vxgA== X-Received: by 2002:a17:90b:4b0d:: with SMTP id lx13mr6342088pjb.146.1639495536527; Tue, 14 Dec 2021 07:25:36 -0800 (PST) Received: from localhost.localdomain ([159.226.95.43]) by smtp.googlemail.com with ESMTPSA id f5sm67707pju.15.2021.12.14.07.25.33 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Tue, 14 Dec 2021 07:25:36 -0800 (PST) From: Miaoqian Lin To: Subject: [PATCH] ASoC: wcd934x: Fix a incorrect use of kstrndup Date: Tue, 14 Dec 2021 15:25:30 +0000 Message-Id: <20211214152530.23767-1-linmq006@gmail.com> X-Mailer: git-send-email 2.17.1 Cc: linmq006@gmail.com, Banajit Goswami , alsa-devel@alsa-project.org, linux-kernel@vger.kernel.org, Takashi Iwai , Liam Girdwood , Mark Brown , Srinivas Kandagatla X-BeenThere: alsa-devel@alsa-project.org X-Mailman-Version: 2.1.15 Precedence: list List-Id: "Alsa-devel mailing list for ALSA developers - http://www.alsa-project.org" List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: alsa-devel-bounces@alsa-project.org Sender: "Alsa-devel" In wcd934x_codec_enable_dec(), widget_name is allocated by kstrndup(). However, according to doc: "Note: Use kmemdup_nul() instead if the size is known exactly." So we should use kmemdup_nul() here instead of kstrndup(). It's similar to CVE-2019-12454. Signed-off-by: Miaoqian Lin --- sound/soc/codecs/wcd934x.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/sound/soc/codecs/wcd934x.c b/sound/soc/codecs/wcd934x.c index e63c6b723d76..c6677cfbce59 100644 --- a/sound/soc/codecs/wcd934x.c +++ b/sound/soc/codecs/wcd934x.c @@ -5005,7 +5005,7 @@ static int wcd934x_codec_enable_dec(struct snd_soc_dapm_widget *w, char *dec; u8 hpf_coff_freq; - widget_name = kstrndup(w->name, 15, GFP_KERNEL); + widget_name = kmemdup_nul(w->name, 15, GFP_KERNEL); if (!widget_name) return -ENOMEM;