From patchwork Thu Aug 22 07:32:03 2019 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Takashi Iwai X-Patchwork-Id: 11108597 Return-Path: Received: from mail.kernel.org (pdx-korg-mail-1.web.codeaurora.org [172.30.200.123]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id 1AE03112C for ; Thu, 22 Aug 2019 07:33:19 +0000 (UTC) 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 mail.kernel.org (Postfix) with ESMTPS id 2D476233FC for ; Thu, 22 Aug 2019 07:33:18 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (1024-bit key) header.d=alsa-project.org header.i=@alsa-project.org header.b="P0mrwAdx" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 2D476233FC Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=suse.de Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=alsa-devel-bounces@alsa-project.org 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 091B315E2; Thu, 22 Aug 2019 09:32:26 +0200 (CEST) DKIM-Filter: OpenDKIM Filter v2.11.0 alsa0.perex.cz 091B315E2 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=alsa-project.org; s=default; t=1566459196; bh=Xh8ijC8EifFmp7N2QBws0OlYhxqXrXDdvNNzlcvgcZg=; h=From:To:Date:In-Reply-To:References:Subject:List-Id: List-Unsubscribe:List-Archive:List-Post:List-Help:List-Subscribe: From; b=P0mrwAdxmGSY9HLbmmv4gnfzaxxcs0ZT113eY4aLcwk85dkC2u2bkdJv64WvgpqAq bhFclbygwoVGgal2S8GNWccwfJ/WthASDsGve4cxZnxNGGp2wl5aBKpmIfgj4s7j8u 0FLR1wdEdwDtvSq+xFmNLhqjHjDojJm1q0Dnx2/0= Received: from alsa1.perex.cz (localhost.localdomain [127.0.0.1]) by alsa1.perex.cz (Postfix) with ESMTP id 4B53AF80147; Thu, 22 Aug 2019 09:32:24 +0200 (CEST) X-Original-To: alsa-devel@alsa-project.org Delivered-To: alsa-devel@alsa-project.org Received: by alsa1.perex.cz (Postfix, from userid 50401) id 6166FF803F3; Thu, 22 Aug 2019 09:32:16 +0200 (CEST) X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on alsa1.perex.cz X-Spam-Level: X-Spam-Status: No, score=0.0 required=5.0 tests=SPF_HELO_NONE,SPF_PASS, URIBL_BLOCKED autolearn=disabled version=3.4.0 Received: from mx1.suse.de (mx2.suse.de [195.135.220.15]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by alsa1.perex.cz (Postfix) with ESMTPS id C0ECDF80147 for ; Thu, 22 Aug 2019 09:32:09 +0200 (CEST) DKIM-Filter: OpenDKIM Filter v2.11.0 alsa1.perex.cz C0ECDF80147 X-Virus-Scanned: by amavisd-new at test-mx.suse.de Received: from relay2.suse.de (unknown [195.135.220.254]) by mx1.suse.de (Postfix) with ESMTP id 06CDBAFE1 for ; Thu, 22 Aug 2019 07:32:09 +0000 (UTC) From: Takashi Iwai To: alsa-devel@alsa-project.org Date: Thu, 22 Aug 2019 09:32:03 +0200 Message-Id: <20190822073207.8696-2-tiwai@suse.de> X-Mailer: git-send-email 2.16.4 In-Reply-To: <20190822073207.8696-1-tiwai@suse.de> References: <20190822073207.8696-1-tiwai@suse.de> Subject: [alsa-devel] [PATCH] ALSA: usb-audio: Check mixer unit bitmap yet more strictly 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: , MIME-Version: 1.0 Errors-To: alsa-devel-bounces@alsa-project.org Sender: "Alsa-devel" The bmControls (for UAC1) or bmMixerControls (for UAC2/3) bitmap has a variable size depending on both input and output pins. Its size is to fit with input * output bits. The problem is that the input size can't be determined simply from the unit descriptor itself but it needs to parse the whole connected sources. Although the uac_mixer_unit_get_channels() tries to check some possible overflow of this bitmap, it's incomplete due to the lack of the evaluation of input pins. For covering possible overflows, this patch adds the bitmap overflow check in the loop of input pins in parse_audio_mixer_unit(). Fixes: 0bfe5e434e66 ("ALSA: usb-audio: Check mixer unit descriptors more strictly") Cc: Signed-off-by: Takashi Iwai Signed-off-by: Takashi Iwai --- sound/usb/mixer.c | 34 ++++++++++++++++++++++++++-------- 1 file changed, 26 insertions(+), 8 deletions(-) diff --git a/sound/usb/mixer.c b/sound/usb/mixer.c index b5927c3d5bc0..27ee68a507a2 100644 --- a/sound/usb/mixer.c +++ b/sound/usb/mixer.c @@ -739,7 +739,6 @@ static int uac_mixer_unit_get_channels(struct mixer_build *state, struct uac_mixer_unit_descriptor *desc) { int mu_channels; - void *c; if (desc->bLength < sizeof(*desc)) return -EINVAL; @@ -762,13 +761,6 @@ static int uac_mixer_unit_get_channels(struct mixer_build *state, break; } - if (!mu_channels) - return 0; - - c = uac_mixer_unit_bmControls(desc, state->mixer->protocol); - if (c - (void *)desc + (mu_channels - 1) / 8 >= desc->bLength) - return 0; /* no bmControls -> skip */ - return mu_channels; } @@ -2009,6 +2001,29 @@ static int parse_audio_feature_unit(struct mixer_build *state, int unitid, * Mixer Unit */ +/* check whether the given in/out overflows bmMixerControls matrix */ +static bool mixer_bitmap_overflow(struct uac_mixer_unit_descriptor *desc, + int protocol, int num_ins, int num_outs) +{ + u8 *hdr = (u8 *)desc; + u8 *c = uac_mixer_unit_bmControls(desc, protocol); + size_t rest; /* remaining bytes after bmMixerControls */ + + switch (protocol) { + case UAC_VERSION_1: + default: + rest = 1; /* iMixer */ + case UAC_VERSION_2: + rest = 2; /* bmControls + iMixer */ + case UAC_VERSION_3: + rest = 6; /* bmControls + wMixerDescrStr */ + break; + } + + /* overflow? */ + return c + (num_ins * num_outs + 7) / 8 + rest > hdr + hdr[0]; +} + /* * build a mixer unit control * @@ -2137,6 +2152,9 @@ static int parse_audio_mixer_unit(struct mixer_build *state, int unitid, if (err < 0) return err; num_ins += iterm.channels; + if (mixer_bitmap_overflow(desc, state->mixer->protocol, + num_ins, num_outs)) + break; for (; ich < num_ins; ich++) { int och, ich_has_controls = 0; From patchwork Thu Aug 22 07:32:05 2019 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Takashi Iwai X-Patchwork-Id: 11108605 Return-Path: Received: from mail.kernel.org (pdx-korg-mail-1.web.codeaurora.org [172.30.200.123]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id 95122112C for ; Thu, 22 Aug 2019 07:36:18 +0000 (UTC) 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 mail.kernel.org (Postfix) with ESMTPS id 2DC61233FC for ; Thu, 22 Aug 2019 07:36:18 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (1024-bit key) header.d=alsa-project.org header.i=@alsa-project.org header.b="h6zfKe9B" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 2DC61233FC Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=suse.de Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=alsa-devel-bounces@alsa-project.org 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 6C5F9851; Thu, 22 Aug 2019 09:35:26 +0200 (CEST) DKIM-Filter: OpenDKIM Filter v2.11.0 alsa0.perex.cz 6C5F9851 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=alsa-project.org; s=default; t=1566459376; bh=bcYizlhDMhn5Oc2mPiml3kh76Bjj23MLW3owRSlAOy8=; h=From:To:Date:In-Reply-To:References:Subject:List-Id: List-Unsubscribe:List-Archive:List-Post:List-Help:List-Subscribe: From; b=h6zfKe9BLuNZdAovDg6XyQPvF9QV5/OjSbnYj0a4tNMe5Z8P7ExmyEAztDO57CZOa UTYz/QsXOTPJn1VHu5A7XJz5qHNcj9fiL67hcYT7xAu85s5LR9ox42wfn8RQNytawq j7xavyu75TkJ2OMT87Dfais1Q/x/O25QWXwSd8vA= Received: from alsa1.perex.cz (localhost.localdomain [127.0.0.1]) by alsa1.perex.cz (Postfix) with ESMTP id 693A6F805FD; Thu, 22 Aug 2019 09:32:37 +0200 (CEST) X-Original-To: alsa-devel@alsa-project.org Delivered-To: alsa-devel@alsa-project.org Received: by alsa1.perex.cz (Postfix, from userid 50401) id 96B96F804CB; Thu, 22 Aug 2019 09:32:24 +0200 (CEST) X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on alsa1.perex.cz X-Spam-Level: X-Spam-Status: No, score=0.5 required=5.0 tests=PRX_BODY_32,SPF_HELO_NONE, SPF_PASS,URIBL_BLOCKED autolearn=disabled version=3.4.0 Received: from mx1.suse.de (mx2.suse.de [195.135.220.15]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by alsa1.perex.cz (Postfix) with ESMTPS id 9390BF8036E for ; Thu, 22 Aug 2019 09:32:10 +0200 (CEST) DKIM-Filter: OpenDKIM Filter v2.11.0 alsa1.perex.cz 9390BF8036E X-Virus-Scanned: by amavisd-new at test-mx.suse.de Received: from relay2.suse.de (unknown [195.135.220.254]) by mx1.suse.de (Postfix) with ESMTP id 29F6FAFF4 for ; Thu, 22 Aug 2019 07:32:09 +0000 (UTC) From: Takashi Iwai To: alsa-devel@alsa-project.org Date: Thu, 22 Aug 2019 09:32:05 +0200 Message-Id: <20190822073207.8696-4-tiwai@suse.de> X-Mailer: git-send-email 2.16.4 In-Reply-To: <20190822073207.8696-1-tiwai@suse.de> References: <20190822073207.8696-1-tiwai@suse.de> Subject: [alsa-devel] [PATCH 2/4] ALSA: usb-audio: Simplify parse_audio_unit() 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: , MIME-Version: 1.0 Errors-To: alsa-devel-bounces@alsa-project.org Sender: "Alsa-devel" Minor code refactoring by combining the UAC version and the type in the switch-case flow, so that we reduce the indentation and redundancy. One good bonus is that the duplicated definition of the same type value (e.g. UAC2_EFFECT_UNIT) can be handled more cleanly. Signed-off-by: Takashi Iwai --- sound/usb/mixer.c | 95 +++++++++++++++++++++++-------------------------------- 1 file changed, 39 insertions(+), 56 deletions(-) diff --git a/sound/usb/mixer.c b/sound/usb/mixer.c index b4be226e07f3..2628697353bb 100644 --- a/sound/usb/mixer.c +++ b/sound/usb/mixer.c @@ -2780,62 +2780,45 @@ static int parse_audio_unit(struct mixer_build *state, int unitid) return 0; /* skip invalid unit */ } - if (protocol == UAC_VERSION_1 || protocol == UAC_VERSION_2) { - switch (p1[2]) { - case UAC_INPUT_TERMINAL: - return parse_audio_input_terminal(state, unitid, p1); - case UAC_MIXER_UNIT: - return parse_audio_mixer_unit(state, unitid, p1); - case UAC2_CLOCK_SOURCE: - return parse_clock_source_unit(state, unitid, p1); - case UAC_SELECTOR_UNIT: - case UAC2_CLOCK_SELECTOR: - return parse_audio_selector_unit(state, unitid, p1); - case UAC_FEATURE_UNIT: - return parse_audio_feature_unit(state, unitid, p1); - case UAC1_PROCESSING_UNIT: - /* UAC2_EFFECT_UNIT has the same value */ - if (protocol == UAC_VERSION_1) - return parse_audio_processing_unit(state, unitid, p1); - else - return 0; /* FIXME - effect units not implemented yet */ - case UAC1_EXTENSION_UNIT: - /* UAC2_PROCESSING_UNIT_V2 has the same value */ - if (protocol == UAC_VERSION_1) - return parse_audio_extension_unit(state, unitid, p1); - else /* UAC_VERSION_2 */ - return parse_audio_processing_unit(state, unitid, p1); - case UAC2_EXTENSION_UNIT_V2: - return parse_audio_extension_unit(state, unitid, p1); - default: - usb_audio_err(state->chip, - "unit %u: unexpected type 0x%02x\n", unitid, p1[2]); - return -EINVAL; - } - } else { /* UAC_VERSION_3 */ - switch (p1[2]) { - case UAC_INPUT_TERMINAL: - return parse_audio_input_terminal(state, unitid, p1); - case UAC3_MIXER_UNIT: - return parse_audio_mixer_unit(state, unitid, p1); - case UAC3_CLOCK_SOURCE: - return parse_clock_source_unit(state, unitid, p1); - case UAC3_SELECTOR_UNIT: - case UAC3_CLOCK_SELECTOR: - return parse_audio_selector_unit(state, unitid, p1); - case UAC3_FEATURE_UNIT: - return parse_audio_feature_unit(state, unitid, p1); - case UAC3_EFFECT_UNIT: - return 0; /* FIXME - effect units not implemented yet */ - case UAC3_PROCESSING_UNIT: - return parse_audio_processing_unit(state, unitid, p1); - case UAC3_EXTENSION_UNIT: - return parse_audio_extension_unit(state, unitid, p1); - default: - usb_audio_err(state->chip, - "unit %u: unexpected type 0x%02x\n", unitid, p1[2]); - return -EINVAL; - } +#define PTYPE(a, b) ((a) << 8 | (b)) + switch (PTYPE(protocol, p1[2])) { + case PTYPE(UAC_VERSION_1, UAC_INPUT_TERMINAL): + case PTYPE(UAC_VERSION_2, UAC_INPUT_TERMINAL): + case PTYPE(UAC_VERSION_3, UAC_INPUT_TERMINAL): + return parse_audio_input_terminal(state, unitid, p1); + case PTYPE(UAC_VERSION_1, UAC_MIXER_UNIT): + case PTYPE(UAC_VERSION_2, UAC_MIXER_UNIT): + case PTYPE(UAC_VERSION_3, UAC3_MIXER_UNIT): + return parse_audio_mixer_unit(state, unitid, p1); + case PTYPE(UAC_VERSION_2, UAC2_CLOCK_SOURCE): + case PTYPE(UAC_VERSION_3, UAC3_CLOCK_SOURCE): + return parse_clock_source_unit(state, unitid, p1); + case PTYPE(UAC_VERSION_1, UAC_SELECTOR_UNIT): + case PTYPE(UAC_VERSION_2, UAC_SELECTOR_UNIT): + case PTYPE(UAC_VERSION_3, UAC3_SELECTOR_UNIT): + case PTYPE(UAC_VERSION_2, UAC2_CLOCK_SELECTOR): + case PTYPE(UAC_VERSION_3, UAC3_CLOCK_SELECTOR): + return parse_audio_selector_unit(state, unitid, p1); + case PTYPE(UAC_VERSION_1, UAC_FEATURE_UNIT): + case PTYPE(UAC_VERSION_2, UAC_FEATURE_UNIT): + case PTYPE(UAC_VERSION_3, UAC3_FEATURE_UNIT): + return parse_audio_feature_unit(state, unitid, p1); + case PTYPE(UAC_VERSION_1, UAC1_PROCESSING_UNIT): + case PTYPE(UAC_VERSION_2, UAC2_PROCESSING_UNIT_V2): + case PTYPE(UAC_VERSION_3, UAC3_PROCESSING_UNIT): + return parse_audio_processing_unit(state, unitid, p1); + case PTYPE(UAC_VERSION_1, UAC1_EXTENSION_UNIT): + case PTYPE(UAC_VERSION_2, UAC2_EXTENSION_UNIT_V2): + case PTYPE(UAC_VERSION_3, UAC3_EXTENSION_UNIT): + return parse_audio_extension_unit(state, unitid, p1); + case PTYPE(UAC_VERSION_2, UAC2_EFFECT_UNIT): + case PTYPE(UAC_VERSION_3, UAC3_EFFECT_UNIT): + return 0; /* FIXME - effect units not implemented yet */ + default: + usb_audio_err(state->chip, + "unit %u: unexpected type 0x%02x\n", + unitid, p1[2]); + return -EINVAL; } } From patchwork Thu Aug 22 07:32:06 2019 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Takashi Iwai X-Patchwork-Id: 11108603 Return-Path: Received: from mail.kernel.org (pdx-korg-mail-1.web.codeaurora.org [172.30.200.123]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id 3C83B112C for ; 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a=rsa-sha256; c=relaxed/simple; d=alsa-project.org; s=default; t=1566459348; bh=LnBu8qBwcZwyNH1SfGgjB+JcfzHPZtr2ENp1yniAZsQ=; h=From:To:Date:In-Reply-To:References:Subject:List-Id: List-Unsubscribe:List-Archive:List-Post:List-Help:List-Subscribe: From; b=BWcl5+J3tTXEIW89KQmKHINSJd9bWJpsxCepCbi0PJBbCNprCxzgKKv3d0KEix56G 5KVowO7YQBpwoxyfMw8WPvm2CdD9hDyh1nr8AsnC2NUpTQenEDRAOYZfDTWJ0Ou7Tu u6lPdvBcLd7uYYdx3YRU7lWSjQLxfUo5mz1XA4UE= Received: from alsa1.perex.cz (localhost.localdomain [127.0.0.1]) by alsa1.perex.cz (Postfix) with ESMTP id 5A729F805F8; Thu, 22 Aug 2019 09:32:35 +0200 (CEST) X-Original-To: alsa-devel@alsa-project.org Delivered-To: alsa-devel@alsa-project.org Received: by alsa1.perex.cz (Postfix, from userid 50401) id F323FF80391; Thu, 22 Aug 2019 09:32:24 +0200 (CEST) X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on alsa1.perex.cz X-Spam-Level: X-Spam-Status: No, score=0.0 required=5.0 tests=SPF_HELO_NONE,SPF_PASS, URIBL_BLOCKED autolearn=disabled version=3.4.0 Received: from mx1.suse.de (mx2.suse.de [195.135.220.15]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by alsa1.perex.cz (Postfix) with ESMTPS id 8B57CF8036D for ; Thu, 22 Aug 2019 09:32:10 +0200 (CEST) DKIM-Filter: OpenDKIM Filter v2.11.0 alsa1.perex.cz 8B57CF8036D X-Virus-Scanned: by amavisd-new at test-mx.suse.de Received: from relay2.suse.de (unknown [195.135.220.254]) by mx1.suse.de (Postfix) with ESMTP id 2B218AFFE for ; Thu, 22 Aug 2019 07:32:09 +0000 (UTC) From: Takashi Iwai To: alsa-devel@alsa-project.org Date: Thu, 22 Aug 2019 09:32:06 +0200 Message-Id: <20190822073207.8696-5-tiwai@suse.de> X-Mailer: git-send-email 2.16.4 In-Reply-To: <20190822073207.8696-1-tiwai@suse.de> References: <20190822073207.8696-1-tiwai@suse.de> Subject: [alsa-devel] [PATCH 3/4] ALSA: usb-audio: Unify the release of usb_mixer_elem_info objects 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: , MIME-Version: 1.0 Errors-To: alsa-devel-bounces@alsa-project.org Sender: "Alsa-devel" Instead of the direct kfree() calls, introduce a new local helper to release the usb_mixer_elem_info object. This will be extended to do more than a single kfree() in the later patches. Also, use the standard goto instead of multiple calls in parse_audio_selector_unit() error paths. Signed-off-by: Takashi Iwai --- sound/usb/mixer.c | 48 ++++++++++++++++++++++++++++-------------------- 1 file changed, 28 insertions(+), 20 deletions(-) diff --git a/sound/usb/mixer.c b/sound/usb/mixer.c index 2628697353bb..7f498528be48 100644 --- a/sound/usb/mixer.c +++ b/sound/usb/mixer.c @@ -1026,10 +1026,15 @@ static struct usb_feature_control_info audio_feature_info[] = { { UAC2_FU_PHASE_INVERTER, "Phase Inverter Control", USB_MIXER_BOOLEAN, -1 }, }; +static void usb_mixer_elem_info_free(struct usb_mixer_elem_info *cval) +{ + kfree(cval); +} + /* private_free callback */ void snd_usb_mixer_elem_free(struct snd_kcontrol *kctl) { - kfree(kctl->private_data); + usb_mixer_elem_info_free(kctl->private_data); kctl->private_data = NULL; } @@ -1552,7 +1557,7 @@ static void __build_feature_ctl(struct usb_mixer_interface *mixer, ctl_info = get_feature_control_info(control); if (!ctl_info) { - kfree(cval); + usb_mixer_elem_info_free(cval); return; } if (mixer->protocol == UAC_VERSION_1) @@ -1585,7 +1590,7 @@ static void __build_feature_ctl(struct usb_mixer_interface *mixer, if (!kctl) { usb_audio_err(mixer->chip, "cannot malloc kcontrol\n"); - kfree(cval); + usb_mixer_elem_info_free(cval); return; } kctl->private_free = snd_usb_mixer_elem_free; @@ -1755,7 +1760,7 @@ static void build_connector_control(struct usb_mixer_interface *mixer, kctl = snd_ctl_new1(&usb_connector_ctl_ro, cval); if (!kctl) { usb_audio_err(mixer->chip, "cannot malloc kcontrol\n"); - kfree(cval); + usb_mixer_elem_info_free(cval); return; } get_connector_control_name(mixer, term, is_input, kctl->id.name, @@ -1808,7 +1813,7 @@ static int parse_clock_source_unit(struct mixer_build *state, int unitid, kctl = snd_ctl_new1(&usb_bool_master_control_ctl_ro, cval); if (!kctl) { - kfree(cval); + usb_mixer_elem_info_free(cval); return -ENOMEM; } @@ -2068,7 +2073,7 @@ static void build_mixer_unit_ctl(struct mixer_build *state, kctl = snd_ctl_new1(&usb_feature_unit_ctl, cval); if (!kctl) { usb_audio_err(state->chip, "cannot malloc kcontrol\n"); - kfree(cval); + usb_mixer_elem_info_free(cval); return; } kctl->private_free = snd_usb_mixer_elem_free; @@ -2466,7 +2471,7 @@ static int build_audio_procunit(struct mixer_build *state, int unitid, kctl = snd_ctl_new1(&mixer_procunit_ctl, cval); if (!kctl) { - kfree(cval); + usb_mixer_elem_info_free(cval); return -ENOMEM; } kctl->private_free = snd_usb_mixer_elem_free; @@ -2604,7 +2609,7 @@ static void usb_mixer_selector_elem_free(struct snd_kcontrol *kctl) if (kctl->private_data) { struct usb_mixer_elem_info *cval = kctl->private_data; num_ins = cval->max; - kfree(cval); + usb_mixer_elem_info_free(cval); kctl->private_data = NULL; } if (kctl->private_value) { @@ -2676,10 +2681,10 @@ static int parse_audio_selector_unit(struct mixer_build *state, int unitid, break; } - namelist = kmalloc_array(desc->bNrInPins, sizeof(char *), GFP_KERNEL); + namelist = kcalloc(desc->bNrInPins, sizeof(char *), GFP_KERNEL); if (!namelist) { - kfree(cval); - return -ENOMEM; + err = -ENOMEM; + goto error_cval; } #define MAX_ITEM_NAME_LEN 64 for (i = 0; i < desc->bNrInPins; i++) { @@ -2687,11 +2692,8 @@ static int parse_audio_selector_unit(struct mixer_build *state, int unitid, len = 0; namelist[i] = kmalloc(MAX_ITEM_NAME_LEN, GFP_KERNEL); if (!namelist[i]) { - while (i--) - kfree(namelist[i]); - kfree(namelist); - kfree(cval); - return -ENOMEM; + err = -ENOMEM; + goto error_name; } len = check_mapped_selector_name(state, unitid, i, namelist[i], MAX_ITEM_NAME_LEN); @@ -2705,10 +2707,8 @@ static int parse_audio_selector_unit(struct mixer_build *state, int unitid, kctl = snd_ctl_new1(&mixer_selectunit_ctl, cval); if (! kctl) { usb_audio_err(state->chip, "cannot malloc kcontrol\n"); - for (i = 0; i < desc->bNrInPins; i++) - kfree(namelist[i]); - kfree(namelist); - kfree(cval); + err = -ENOMEM; + goto error_name; return -ENOMEM; } kctl->private_value = (unsigned long)namelist; @@ -2755,6 +2755,14 @@ static int parse_audio_selector_unit(struct mixer_build *state, int unitid, usb_audio_dbg(state->chip, "[%d] SU [%s] items = %d\n", cval->head.id, kctl->id.name, desc->bNrInPins); return snd_usb_mixer_add_control(&cval->head, kctl); + + error_name: + for (i = 0; i < desc->bNrInPins; i++) + kfree(namelist[i]); + kfree(namelist); + error_cval: + usb_mixer_elem_info_free(cval); + return err; } /* From patchwork Thu Aug 22 07:32:07 2019 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Takashi Iwai X-Patchwork-Id: 11108607 Return-Path: Received: from mail.kernel.org (pdx-korg-mail-1.web.codeaurora.org [172.30.200.123]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id 8D297112C for ; Thu, 22 Aug 2019 07:36:48 +0000 (UTC) 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 mail.kernel.org (Postfix) with ESMTPS id 244B82339F for ; Thu, 22 Aug 2019 07:36:48 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (1024-bit key) header.d=alsa-project.org header.i=@alsa-project.org header.b="nYwLZB3v" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 244B82339F Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=suse.de Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=alsa-devel-bounces@alsa-project.org 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 642D41682; Thu, 22 Aug 2019 09:35:56 +0200 (CEST) DKIM-Filter: OpenDKIM Filter v2.11.0 alsa0.perex.cz 642D41682 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=alsa-project.org; s=default; t=1566459406; bh=FJkTF/qgujVd0MbC2DyRmHHXCU5Hufh2KW/4ivViUJU=; h=From:To:Date:In-Reply-To:References:Subject:List-Id: List-Unsubscribe:List-Archive:List-Post:List-Help:List-Subscribe: From; b=nYwLZB3vt1LRiRayYHIndmJ5PcO7BGo57sQVzp1epBGxb6nROPsBT2kw8RSzUKn8x prePeN4EE8qoHm2f7tcNvEmTdP83W37PNOhzn8LdmKVa6klhlRp8ZMLBmDj2fHg+hs hnymqJLS/tiJXmeorAwA3K6D1UTvgYskxM2AfKrk= Received: from alsa1.perex.cz (localhost.localdomain [127.0.0.1]) by alsa1.perex.cz (Postfix) with ESMTP id 44C40F8060E; Thu, 22 Aug 2019 09:32:39 +0200 (CEST) X-Original-To: alsa-devel@alsa-project.org Delivered-To: alsa-devel@alsa-project.org Received: by alsa1.perex.cz (Postfix, from userid 50401) id 08221F8036D; Thu, 22 Aug 2019 09:32:24 +0200 (CEST) X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on alsa1.perex.cz X-Spam-Level: X-Spam-Status: No, score=0.0 required=5.0 tests=SPF_HELO_NONE,SPF_PASS, URIBL_BLOCKED autolearn=disabled version=3.4.0 Received: from mx1.suse.de (mx2.suse.de [195.135.220.15]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by alsa1.perex.cz (Postfix) with ESMTPS id 300B9F803D5 for ; Thu, 22 Aug 2019 09:32:12 +0200 (CEST) DKIM-Filter: OpenDKIM Filter v2.11.0 alsa1.perex.cz 300B9F803D5 X-Virus-Scanned: by amavisd-new at test-mx.suse.de Received: from relay2.suse.de (unknown [195.135.220.254]) by mx1.suse.de (Postfix) with ESMTP id 3A791B005 for ; Thu, 22 Aug 2019 07:32:09 +0000 (UTC) From: Takashi Iwai To: alsa-devel@alsa-project.org Date: Thu, 22 Aug 2019 09:32:07 +0200 Message-Id: <20190822073207.8696-6-tiwai@suse.de> X-Mailer: git-send-email 2.16.4 In-Reply-To: <20190822073207.8696-1-tiwai@suse.de> References: <20190822073207.8696-1-tiwai@suse.de> Subject: [alsa-devel] [PATCH 4/4] ALSA: usb-audio: Remove superfluous bLength checks 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: , MIME-Version: 1.0 Errors-To: alsa-devel-bounces@alsa-project.org Sender: "Alsa-devel" Now that we got the more comprehensive validation code for USB-audio descriptors, the check of overflow in each descriptor unit parser became superfluous. Drop some of the obvious cases. Signed-off-by: Takashi Iwai --- sound/usb/clock.c | 14 ++++------ sound/usb/mixer.c | 84 ------------------------------------------------------- 2 files changed, 6 insertions(+), 92 deletions(-) diff --git a/sound/usb/clock.c b/sound/usb/clock.c index 72e9bdf76115..6b8c14f9b5d4 100644 --- a/sound/usb/clock.c +++ b/sound/usb/clock.c @@ -38,39 +38,37 @@ static void *find_uac_clock_desc(struct usb_host_interface *iface, int id, static bool validate_clock_source_v2(void *p, int id) { struct uac_clock_source_descriptor *cs = p; - return cs->bLength == sizeof(*cs) && cs->bClockID == id; + return cs->bClockID == id; } static bool validate_clock_source_v3(void *p, int id) { struct uac3_clock_source_descriptor *cs = p; - return cs->bLength == sizeof(*cs) && cs->bClockID == id; + return cs->bClockID == id; } static bool validate_clock_selector_v2(void *p, int id) { struct uac_clock_selector_descriptor *cs = p; - return cs->bLength >= sizeof(*cs) && cs->bClockID == id && - cs->bLength == 7 + cs->bNrInPins; + return cs->bClockID == id; } static bool validate_clock_selector_v3(void *p, int id) { struct uac3_clock_selector_descriptor *cs = p; - return cs->bLength >= sizeof(*cs) && cs->bClockID == id && - cs->bLength == 11 + cs->bNrInPins; + return cs->bClockID == id; } static bool validate_clock_multiplier_v2(void *p, int id) { struct uac_clock_multiplier_descriptor *cs = p; - return cs->bLength == sizeof(*cs) && cs->bClockID == id; + return cs->bClockID == id; } static bool validate_clock_multiplier_v3(void *p, int id) { struct uac3_clock_multiplier_descriptor *cs = p; - return cs->bLength == sizeof(*cs) && cs->bClockID == id; + return cs->bClockID == id; } #define DEFINE_FIND_HELPER(name, obj, validator, type) \ diff --git a/sound/usb/mixer.c b/sound/usb/mixer.c index 7f498528be48..61b240835574 100644 --- a/sound/usb/mixer.c +++ b/sound/usb/mixer.c @@ -740,13 +740,6 @@ static int uac_mixer_unit_get_channels(struct mixer_build *state, { int mu_channels; - if (desc->bLength < sizeof(*desc)) - return -EINVAL; - if (!desc->bNrInPins) - return -EINVAL; - if (desc->bLength < sizeof(*desc) + desc->bNrInPins) - return -EINVAL; - switch (state->mixer->protocol) { case UAC_VERSION_1: case UAC_VERSION_2: @@ -1781,13 +1774,6 @@ static int parse_clock_source_unit(struct mixer_build *state, int unitid, if (state->mixer->protocol != UAC_VERSION_2) return -EINVAL; - if (hdr->bLength != sizeof(*hdr)) { - usb_audio_dbg(state->chip, - "Bogus clock source descriptor length of %d, ignoring.\n", - hdr->bLength); - return 0; - } - /* * The only property of this unit we are interested in is the * clock source validity. If that isn't readable, just bail out. @@ -1846,62 +1832,20 @@ static int parse_audio_feature_unit(struct mixer_build *state, int unitid, __u8 *bmaControls; if (state->mixer->protocol == UAC_VERSION_1) { - if (hdr->bLength < 7) { - usb_audio_err(state->chip, - "unit %u: invalid UAC_FEATURE_UNIT descriptor\n", - unitid); - return -EINVAL; - } csize = hdr->bControlSize; - if (!csize) { - usb_audio_dbg(state->chip, - "unit %u: invalid bControlSize == 0\n", - unitid); - return -EINVAL; - } channels = (hdr->bLength - 7) / csize - 1; bmaControls = hdr->bmaControls; - if (hdr->bLength < 7 + csize) { - usb_audio_err(state->chip, - "unit %u: invalid UAC_FEATURE_UNIT descriptor\n", - unitid); - return -EINVAL; - } } else if (state->mixer->protocol == UAC_VERSION_2) { struct uac2_feature_unit_descriptor *ftr = _ftr; - if (hdr->bLength < 6) { - usb_audio_err(state->chip, - "unit %u: invalid UAC_FEATURE_UNIT descriptor\n", - unitid); - return -EINVAL; - } csize = 4; channels = (hdr->bLength - 6) / 4 - 1; bmaControls = ftr->bmaControls; - if (hdr->bLength < 6 + csize) { - usb_audio_err(state->chip, - "unit %u: invalid UAC_FEATURE_UNIT descriptor\n", - unitid); - return -EINVAL; - } } else { /* UAC_VERSION_3 */ struct uac3_feature_unit_descriptor *ftr = _ftr; - if (hdr->bLength < 7) { - usb_audio_err(state->chip, - "unit %u: invalid UAC3_FEATURE_UNIT descriptor\n", - unitid); - return -EINVAL; - } csize = 4; channels = (ftr->bLength - 7) / 4 - 1; bmaControls = ftr->bmaControls; - if (hdr->bLength < 7 + csize) { - usb_audio_err(state->chip, - "unit %u: invalid UAC3_FEATURE_UNIT descriptor\n", - unitid); - return -EINVAL; - } } /* parse the source unit */ @@ -2099,15 +2043,11 @@ static int parse_audio_input_terminal(struct mixer_build *state, int unitid, if (state->mixer->protocol == UAC_VERSION_2) { struct uac2_input_terminal_descriptor *d_v2 = raw_desc; - if (d_v2->bLength < sizeof(*d_v2)) - return -EINVAL; control = UAC2_TE_CONNECTOR; term_id = d_v2->bTerminalID; bmctls = le16_to_cpu(d_v2->bmControls); } else if (state->mixer->protocol == UAC_VERSION_3) { struct uac3_input_terminal_descriptor *d_v3 = raw_desc; - if (d_v3->bLength < sizeof(*d_v3)) - return -EINVAL; control = UAC3_TE_INSERTION; term_id = d_v3->bTerminalID; bmctls = le32_to_cpu(d_v3->bmControls); @@ -2369,18 +2309,7 @@ static int build_audio_procunit(struct mixer_build *state, int unitid, const char *name = extension_unit ? "Extension Unit" : "Processing Unit"; - if (desc->bLength < 13) { - usb_audio_err(state->chip, "invalid %s descriptor (id %d)\n", name, unitid); - return -EINVAL; - } - num_ins = desc->bNrInPins; - if (desc->bLength < 13 + num_ins || - desc->bLength < num_ins + uac_processing_unit_bControlSize(desc, state->mixer->protocol)) { - usb_audio_err(state->chip, "invalid %s descriptor (id %d)\n", name, unitid); - return -EINVAL; - } - for (i = 0; i < num_ins; i++) { err = parse_audio_unit(state, desc->baSourceID[i]); if (err < 0) @@ -2635,13 +2564,6 @@ static int parse_audio_selector_unit(struct mixer_build *state, int unitid, const struct usbmix_name_map *map; char **namelist; - if (desc->bLength < 5 || !desc->bNrInPins || - desc->bLength < 5 + desc->bNrInPins) { - usb_audio_err(state->chip, - "invalid SELECTOR UNIT descriptor %d\n", unitid); - return -EINVAL; - } - for (i = 0; i < desc->bNrInPins; i++) { err = parse_audio_unit(state, desc->baSourceID[i]); if (err < 0) @@ -3147,8 +3069,6 @@ static int snd_usb_mixer_controls(struct usb_mixer_interface *mixer) if (mixer->protocol == UAC_VERSION_1) { struct uac1_output_terminal_descriptor *desc = p; - if (desc->bLength < sizeof(*desc)) - continue; /* invalid descriptor? */ /* mark terminal ID as visited */ set_bit(desc->bTerminalID, state.unitbitmap); state.oterm.id = desc->bTerminalID; @@ -3160,8 +3080,6 @@ static int snd_usb_mixer_controls(struct usb_mixer_interface *mixer) } else if (mixer->protocol == UAC_VERSION_2) { struct uac2_output_terminal_descriptor *desc = p; - if (desc->bLength < sizeof(*desc)) - continue; /* invalid descriptor? */ /* mark terminal ID as visited */ set_bit(desc->bTerminalID, state.unitbitmap); state.oterm.id = desc->bTerminalID; @@ -3187,8 +3105,6 @@ static int snd_usb_mixer_controls(struct usb_mixer_interface *mixer) } else { /* UAC_VERSION_3 */ struct uac3_output_terminal_descriptor *desc = p; - if (desc->bLength < sizeof(*desc)) - continue; /* invalid descriptor? */ /* mark terminal ID as visited */ set_bit(desc->bTerminalID, state.unitbitmap); state.oterm.id = desc->bTerminalID;