From nobody Mon Feb 9 23:15:41 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 35D59C77B75 for ; Fri, 19 May 2023 09:32:48 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S231575AbjESJcq (ORCPT ); Fri, 19 May 2023 05:32:46 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:38278 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S231563AbjESJb6 (ORCPT ); Fri, 19 May 2023 05:31:58 -0400 Received: from smtp-out1.suse.de (smtp-out1.suse.de [195.135.220.28]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 7D0C31723 for ; Fri, 19 May 2023 02:31:44 -0700 (PDT) Received: from imap2.suse-dmz.suse.de (imap2.suse-dmz.suse.de [192.168.254.74]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature ECDSA (P-521) server-digest SHA512) (No client certificate requested) by smtp-out1.suse.de (Postfix) with ESMTPS id 22B0722245; Fri, 19 May 2023 09:31:43 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=suse.de; s=susede2_rsa; t=1684488703; h=from:from:reply-to:date:date:message-id:message-id:to:to:cc:cc: mime-version:mime-version: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=XcYWfCebI4c2wHjl2VTt/v++678oQs8qU/FjGxpuSm4=; b=W3C6C6OG5DriJnuaTCyomVC3SHuvO6pJhZua9PXCvkf9TCrwUghZsas80WNInQ/UdWZ6gZ Dl0WY5bcDa7/iJN6IwCxDAUVRS5rZd6PB5L6/b6M3XaRTDB65NL3TQv/XWHUzHdrcj3SaL fF1kQOMWSWMhN1i3lOFnUi+K10wUU5M= DKIM-Signature: v=1; a=ed25519-sha256; c=relaxed/relaxed; d=suse.de; s=susede2_ed25519; t=1684488703; h=from:from:reply-to:date:date:message-id:message-id:to:to:cc:cc: mime-version:mime-version: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=XcYWfCebI4c2wHjl2VTt/v++678oQs8qU/FjGxpuSm4=; b=sMn72hTdvb7ZFG7r7IREHwUPk5KvgFKSUYeWzHEmUKmRu+DsIrAmZ40TLfzuXYSxDKQvua y19tf5JNmqYvhMAw== Received: from imap2.suse-dmz.suse.de (imap2.suse-dmz.suse.de [192.168.254.74]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature ECDSA (P-521) server-digest SHA512) (No client certificate requested) by imap2.suse-dmz.suse.de (Postfix) with ESMTPS id ECF3413A12; Fri, 19 May 2023 09:31:42 +0000 (UTC) Received: from dovecot-director2.suse.de ([192.168.254.65]) by imap2.suse-dmz.suse.de with ESMTPSA id gIEBOf5BZ2RXJAAAMHmgww (envelope-from ); Fri, 19 May 2023 09:31:42 +0000 From: Takashi Iwai To: alsa-devel@alsa-project.org Cc: linux-kernel@vger.kernel.org Subject: [PATCH 22/36] ALSA: seq: Prohibit creating ports with special numbers Date: Fri, 19 May 2023 11:31:00 +0200 Message-Id: <20230519093114.28813-23-tiwai@suse.de> X-Mailer: git-send-email 2.35.3 In-Reply-To: <20230519093114.28813-1-tiwai@suse.de> References: <20230519093114.28813-1-tiwai@suse.de> 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" Some port numbers are special, such as 254 for subscribers and 255 for broadcast. Return error if application tries to create such a port. Signed-off-by: Takashi Iwai --- sound/core/seq/seq_clientmgr.c | 2 ++ 1 file changed, 2 insertions(+) diff --git a/sound/core/seq/seq_clientmgr.c b/sound/core/seq/seq_clientmgr.c index 2dac8c3355fd..0f26f20596d7 100644 --- a/sound/core/seq/seq_clientmgr.c +++ b/sound/core/seq/seq_clientmgr.c @@ -1206,6 +1206,8 @@ static int snd_seq_ioctl_create_port(struct snd_seq_c= lient *client, void *arg) port_idx =3D info->addr.port; else port_idx =3D -1; + if (port_idx >=3D SNDRV_SEQ_ADDRESS_UNKNOWN) + return -EINVAL; err =3D snd_seq_create_port(client, port_idx, &port); if (err < 0) return err; --=20 2.35.3