From patchwork Fri Apr 21 14:10:06 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Oswald Buddenhagen X-Patchwork-Id: 675880 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 C9C14C77B71 for ; Fri, 21 Apr 2023 14:13:48 +0000 (UTC) Received: from alsa1.perex.cz (alsa1.perex.cz [207.180.221.201]) (using TLSv1.2 with cipher ADH-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by alsa0.perex.cz (Postfix) with ESMTPS id 698AEE9B; Fri, 21 Apr 2023 16:12:56 +0200 (CEST) DKIM-Filter: OpenDKIM Filter v2.11.0 alsa0.perex.cz 698AEE9B DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=alsa-project.org; s=default; t=1682086426; bh=OtlEK7o2jDl7lioBNIX36Xoy3H/KPbhK1KCHW/LOiWs=; h=From:To:Subject:Date:CC:List-Id:List-Archive:List-Help:List-Owner: List-Post:List-Subscribe:List-Unsubscribe:From; b=p/M+IhNk2d2INvvhGmhipB2KnWALPwef2ViBCI6yBTyFYf9ZNwn1GMII0c9blmCGi V7Plvj04wt4uG94e2KWq6weMj0sjBqpssxE1T4964i/d0rzXUvuxRSlC076QEshXDf yJLwkhGf2n44cP+J6jPO2JHBsyboV1lEPZBBgnrE= Received: from mailman-core.alsa-project.org (mailman-core.alsa-project.org [10.254.200.10]) by alsa1.perex.cz (Postfix) with ESMTP id 712E7F8057D; Fri, 21 Apr 2023 16:10:42 +0200 (CEST) Received: by alsa1.perex.cz (Postfix, from userid 50401) id BC2B6F80567; Fri, 21 Apr 2023 16:10:31 +0200 (CEST) Received: from bluemchen.kde.org (bluemchen.kde.org [209.51.188.41]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by alsa1.perex.cz (Postfix) with ESMTPS id 20E2FF80528 for ; Fri, 21 Apr 2023 16:10:11 +0200 (CEST) DKIM-Filter: OpenDKIM Filter v2.11.0 alsa1.perex.cz 20E2FF80528 Received: from ugly.fritz.box (localhost [127.0.0.1]) by bluemchen.kde.org (Postfix) with ESMTP id D59A524257; Fri, 21 Apr 2023 10:10:06 -0400 (EDT) Received: by ugly.fritz.box (masqmail 0.3.4, from userid 1000) id 1pprSg-DaH-00; Fri, 21 Apr 2023 16:10:06 +0200 From: Oswald Buddenhagen To: alsa-devel@alsa-project.org Subject: [PATCH] ALSA: emu10k1: properly assert DSP init constraints Date: Fri, 21 Apr 2023 16:10:06 +0200 Message-Id: <20230421141006.1005524-1-oswald.buddenhagen@gmx.de> X-Mailer: git-send-email 2.40.0.152.g15d061e6df MIME-Version: 1.0 Message-ID-Hash: KZHUV25QNON2SVXY45KXIJVK5T4K6R3H X-Message-ID-Hash: KZHUV25QNON2SVXY45KXIJVK5T4K6R3H X-MailFrom: ossi@kde.org X-Mailman-Rule-Misses: dmarc-mitigation; no-senders; approved; emergency; loop; banned-address; member-moderation; header-match-alsa-devel.alsa-project.org-0; header-match-alsa-devel.alsa-project.org-1; nonmember-moderation; administrivia; implicit-dest; max-recipients; max-size; news-moderation; no-subject; digests; suspicious-header CC: Takashi Iwai X-Mailman-Version: 3.3.8 Precedence: list List-Id: "Alsa-devel mailing list for ALSA developers - http://www.alsa-project.org" Archived-At: List-Archive: List-Help: List-Owner: List-Post: List-Subscribe: List-Unsubscribe: If these are hit, we've already trashed kernel space. There is no recovery from that. Signed-off-by: Oswald Buddenhagen --- sound/pci/emu10k1/emufx.c | 21 +++++---------------- 1 file changed, 5 insertions(+), 16 deletions(-) diff --git a/sound/pci/emu10k1/emufx.c b/sound/pci/emu10k1/emufx.c index 6cf7c8b1de47..f6f05219f7fc 100644 --- a/sound/pci/emu10k1/emufx.c +++ b/sound/pci/emu10k1/emufx.c @@ -1773,22 +1773,19 @@ A_OP(icode, &ptr, iMAC0, A_GPR(var), A_GPR(var), A_GPR(vol), A_EXTIN(input)) * ok, set up done.. */ - if (gpr > tmp) { - snd_BUG(); - err = -EIO; - goto __err; - } + BUG_ON(gpr > tmp); + BUG_ON(nctl > SND_EMU10K1_GPR_CONTROLS); + /* clear remaining instruction memory */ while (ptr < 0x400) A_OP(icode, &ptr, 0x0f, 0xc0, 0xc0, 0xcf, 0xc0); icode->gpr_add_control_count = nctl; icode->gpr_add_controls = controls; emu->support_tlv = 1; /* support TLV */ err = snd_emu10k1_icode_poke(emu, icode, true); emu->support_tlv = 0; /* clear again */ -__err: kfree(controls); __err_ctrls: kfree(icode->gpr_map); @@ -2391,16 +2388,8 @@ static int _snd_emu10k1_init_efx(struct snd_emu10k1 *emu) } - if (gpr > tmp) { - snd_BUG(); - err = -EIO; - goto __err; - } - if (i > SND_EMU10K1_GPR_CONTROLS) { - snd_BUG(); - err = -EIO; - goto __err; - } + BUG_ON(gpr > tmp); + BUG_ON(i > SND_EMU10K1_GPR_CONTROLS); /* clear remaining instruction memory */ while (ptr < 0x200)