From mboxrd@z Thu Jan 1 00:00:00 1970 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 02EACC433FE for ; Wed, 2 Nov 2022 02:35:25 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S229516AbiKBCfX (ORCPT ); Tue, 1 Nov 2022 22:35:23 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:54290 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S230143AbiKBCfW (ORCPT ); Tue, 1 Nov 2022 22:35:22 -0400 Received: from ams.source.kernel.org (ams.source.kernel.org [IPv6:2604:1380:4601:e00::1]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 21A5BDFB2 for ; Tue, 1 Nov 2022 19:35:17 -0700 (PDT) Received: from smtp.kernel.org (relay.kernel.org [52.25.139.140]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by ams.source.kernel.org (Postfix) with ESMTPS id B7029B8206C for ; Wed, 2 Nov 2022 02:35:15 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 8C226C433D7; Wed, 2 Nov 2022 02:35:13 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1667356514; bh=41w9ZehxsUJD7T2aDceAR56OFmvf3uzjT+IyH2aXooc=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=aOcGwqwSXAK0tfG/7D8sDa1J50dBKCA7A+I14vjcimTH6hWYMdKFh/0NumBQbbqV6 ds4uhVjqTd3IeI+lwTtUd34RARY5/++9O/UzdZK3Pfw/MweZ5dSuqvye3VlLhC8C0I I2tZkJx78xq2p7legAj+JAtUYCAOCWV+kZ4uMahI= From: Greg Kroah-Hartman To: stable@vger.kernel.org Cc: Greg Kroah-Hartman , patches@lists.linux.dev, "Maciej S. Szmigiero" , Takashi Iwai Subject: [PATCH 6.0 013/240] ALSA: ac97: Use snd_ctl_rename() to rename a control Date: Wed, 2 Nov 2022 03:29:48 +0100 Message-Id: <20221102022111.709183979@linuxfoundation.org> X-Mailer: git-send-email 2.38.1 In-Reply-To: <20221102022111.398283374@linuxfoundation.org> References: <20221102022111.398283374@linuxfoundation.org> User-Agent: quilt/0.67 MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: stable@vger.kernel.org From: Maciej S. Szmigiero commit 52d256cc71f546f67037100c64eb4fa3ae5e4704 upstream. With the recent addition of hashed controls lookup it's not enough to just update the control name field, the hash entries for the modified control have to be updated too. snd_ctl_rename() takes care of that, so use it instead of directly modifying the control name. While we are at it, check also that the new control name doesn't accidentally overwrite the available buffer space. Fixes: c27e1efb61c5 ("ALSA: control: Use xarray for faster lookups") Cc: stable@vger.kernel.org Signed-off-by: Maciej S. Szmigiero Link: https://lore.kernel.org/r/adb68bfa0885ba4a2583794b828f8e20d23f67c7.1666296963.git.maciej.szmigiero@oracle.com Signed-off-by: Takashi Iwai Signed-off-by: Greg Kroah-Hartman --- sound/pci/ac97/ac97_codec.c | 32 ++++++++++++++++++++++++-------- 1 file changed, 24 insertions(+), 8 deletions(-) --- a/sound/pci/ac97/ac97_codec.c +++ b/sound/pci/ac97/ac97_codec.c @@ -2655,11 +2655,18 @@ EXPORT_SYMBOL(snd_ac97_resume); */ static void set_ctl_name(char *dst, const char *src, const char *suffix) { - if (suffix) - sprintf(dst, "%s %s", src, suffix); - else - strcpy(dst, src); -} + const size_t msize = SNDRV_CTL_ELEM_ID_NAME_MAXLEN; + + if (suffix) { + if (snprintf(dst, msize, "%s %s", src, suffix) >= msize) + pr_warn("ALSA: AC97 control name '%s %s' truncated to '%s'\n", + src, suffix, dst); + } else { + if (strscpy(dst, src, msize) < 0) + pr_warn("ALSA: AC97 control name '%s' truncated to '%s'\n", + src, dst); + } +} /* remove the control with the given name and optional suffix */ static int snd_ac97_remove_ctl(struct snd_ac97 *ac97, const char *name, @@ -2686,8 +2693,11 @@ static int snd_ac97_rename_ctl(struct sn const char *dst, const char *suffix) { struct snd_kcontrol *kctl = ctl_find(ac97, src, suffix); + char name[SNDRV_CTL_ELEM_ID_NAME_MAXLEN]; + if (kctl) { - set_ctl_name(kctl->id.name, dst, suffix); + set_ctl_name(name, dst, suffix); + snd_ctl_rename(ac97->bus->card, kctl, name); return 0; } return -ENOENT; @@ -2706,11 +2716,17 @@ static int snd_ac97_swap_ctl(struct snd_ const char *s2, const char *suffix) { struct snd_kcontrol *kctl1, *kctl2; + char name[SNDRV_CTL_ELEM_ID_NAME_MAXLEN]; + kctl1 = ctl_find(ac97, s1, suffix); kctl2 = ctl_find(ac97, s2, suffix); if (kctl1 && kctl2) { - set_ctl_name(kctl1->id.name, s2, suffix); - set_ctl_name(kctl2->id.name, s1, suffix); + set_ctl_name(name, s2, suffix); + snd_ctl_rename(ac97->bus->card, kctl1, name); + + set_ctl_name(name, s1, suffix); + snd_ctl_rename(ac97->bus->card, kctl2, name); + return 0; } return -ENOENT;