From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 739D120316 for ; Mon, 6 Nov 2023 13:15:45 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b="xMHwThHB" Received: by smtp.kernel.org (Postfix) with ESMTPSA id E288BC433C7; Mon, 6 Nov 2023 13:15:44 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1699276545; bh=JxZscK3rDOGNiHptFuQG8H6QVMFLyBn2f8FHX4iAae0=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=xMHwThHB9S37XL7BMAIkaLaFN354zKaEKGCEX7q98Pw7ITwqksQ56u5YmXVG5secy aefb6JBTzFYOrlevw6fwDw/05EQoy9fJ2QMiNoBffNcvXs/FaKFGI21myuh0tIXRwx 9wkhpQCkmtVBBIy0oX1N13E5BJ/D0/QqfV2q4QJs= From: Greg Kroah-Hartman To: stable@vger.kernel.org Cc: Greg Kroah-Hartman , patches@lists.linux.dev, Cezary Rojewski , =?UTF-8?q?Amadeusz=20S=C5=82awi=C5=84ski?= , Mark Brown , Sasha Levin Subject: [PATCH 6.5 05/88] ASoC: core: Do not call link_exit() on uninitialized rtd objects Date: Mon, 6 Nov 2023 14:02:59 +0100 Message-ID: <20231106130305.963933242@linuxfoundation.org> X-Mailer: git-send-email 2.42.0 In-Reply-To: <20231106130305.772449722@linuxfoundation.org> References: <20231106130305.772449722@linuxfoundation.org> User-Agent: quilt/0.67 X-stable: review X-Patchwork-Hint: ignore Precedence: bulk X-Mailing-List: patches@lists.linux.dev List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit 6.5-stable review patch. If anyone has any objections, please let me know. ------------------ From: Amadeusz Sławiński [ Upstream commit dd9f9cc1e6b9391140afa5cf27bb47c9e2a08d02 ] On init we have sequence: for_each_card_prelinks(card, i, dai_link) { ret = snd_soc_add_pcm_runtime(card, dai_link); ret = init_some_other_things(...); if (ret) goto probe_end: for_each_card_rtds(card, rtd) { ret = soc_init_pcm_runtime(card, rtd); probe_end: while on exit: for_each_card_rtds(card, rtd) snd_soc_link_exit(rtd); If init_some_other_things() step fails due to error we end up with not fully setup rtds and try to call snd_soc_link_exit on them, which depending on contents on .link_exit handler, can end up dereferencing NULL pointer. Reviewed-by: Cezary Rojewski Signed-off-by: Amadeusz Sławiński Link: https://lore.kernel.org/r/20230929103243.705433-2-amadeuszx.slawinski@linux.intel.com Signed-off-by: Mark Brown Signed-off-by: Sasha Levin --- include/sound/soc.h | 2 ++ sound/soc/soc-core.c | 20 +++++++++++++++----- 2 files changed, 17 insertions(+), 5 deletions(-) diff --git a/include/sound/soc.h b/include/sound/soc.h index b27f84580c5b0..cf34810882347 100644 --- a/include/sound/soc.h +++ b/include/sound/soc.h @@ -1125,6 +1125,8 @@ struct snd_soc_pcm_runtime { unsigned int pop_wait:1; unsigned int fe_compr:1; /* for Dynamic PCM */ + bool initialized; + int num_components; struct snd_soc_component *components[]; /* CPU/Codec/Platform */ }; diff --git a/sound/soc/soc-core.c b/sound/soc/soc-core.c index 1a0bde23f5e6f..2d85164457f73 100644 --- a/sound/soc/soc-core.c +++ b/sound/soc/soc-core.c @@ -1259,7 +1259,7 @@ static int soc_init_pcm_runtime(struct snd_soc_card *card, snd_soc_runtime_get_dai_fmt(rtd); ret = snd_soc_runtime_set_dai_fmt(rtd, dai_link->dai_fmt); if (ret) - return ret; + goto err; /* add DPCM sysfs entries */ soc_dpcm_debugfs_add(rtd); @@ -1284,17 +1284,26 @@ static int soc_init_pcm_runtime(struct snd_soc_card *card, /* create compress_device if possible */ ret = snd_soc_dai_compress_new(cpu_dai, rtd, num); if (ret != -ENOTSUPP) - return ret; + goto err; /* create the pcm */ ret = soc_new_pcm(rtd, num); if (ret < 0) { dev_err(card->dev, "ASoC: can't create pcm %s :%d\n", dai_link->stream_name, ret); - return ret; + goto err; } - return snd_soc_pcm_dai_new(rtd); + ret = snd_soc_pcm_dai_new(rtd); + if (ret < 0) + goto err; + + rtd->initialized = true; + + return 0; +err: + snd_soc_link_exit(rtd); + return ret; } static void soc_set_name_prefix(struct snd_soc_card *card, @@ -1892,7 +1901,8 @@ static void soc_cleanup_card_resources(struct snd_soc_card *card) /* release machine specific resources */ for_each_card_rtds(card, rtd) - snd_soc_link_exit(rtd); + if (rtd->initialized) + snd_soc_link_exit(rtd); /* remove and free each DAI */ soc_remove_link_dais(card); soc_remove_link_components(card); -- 2.42.0