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 7C097C6FD1C for ; Wed, 22 Mar 2023 19:57:33 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S230476AbjCVT5b (ORCPT ); Wed, 22 Mar 2023 15:57:31 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:43446 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229620AbjCVT5I (ORCPT ); Wed, 22 Mar 2023 15:57:08 -0400 Received: from dfw.source.kernel.org (dfw.source.kernel.org [139.178.84.217]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id C375864865; Wed, 22 Mar 2023 12:56:45 -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 dfw.source.kernel.org (Postfix) with ESMTPS id D883F62276; Wed, 22 Mar 2023 19:56:44 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 1E68EC433D2; Wed, 22 Mar 2023 19:56:43 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1679515004; bh=I5p+nFrt1hderaCIh4QWIYwi/J9OVB299B44AzHSw3I=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=E+F98dBoCunSkg96oFbFI5q7RqHIv6gvXE2s+GU3QQxykQCIZQAk4uAOtfJEfBQx1 DJJjDt/sgr8HF25LD+2F3VJdh9Jn9vmWoIp4RFY6hg3+ePfSEJgI2fX5CQskEaC59T YL3FhBpDJCVxMOKmf2Lll0u7K/5NZwHumb5C63McEcDJcbIlx49Lk2TqND2ysU0sP8 qgwy/lY+12Iy7q5uSKic41QaR7pQ6w9RDgaQ0GNHdEJpDUM33QASlj10T/UU/FBDeN Zh4HTXaOhE8x7+VWIhTeB8ZppTuOo4GaEZtq2/BON5x8AGwHBFG1Nz/DiB0vh9HB/i 5h3pVbQBCh0jg== From: Sasha Levin To: linux-kernel@vger.kernel.org, stable@vger.kernel.org Cc: Ravulapati Vishnu Vardhan Rao , Mark Brown , Sasha Levin , srinivas.kandagatla@linaro.org, bgoswami@quicinc.com, lgirdwood@gmail.com, perex@perex.cz, tiwai@suse.com, alsa-devel@alsa-project.org Subject: [PATCH AUTOSEL 6.2 02/45] ASoC: codecs: tx-macro: Fix for KASAN: slab-out-of-bounds Date: Wed, 22 Mar 2023 15:55:56 -0400 Message-Id: <20230322195639.1995821-2-sashal@kernel.org> X-Mailer: git-send-email 2.39.2 In-Reply-To: <20230322195639.1995821-1-sashal@kernel.org> References: <20230322195639.1995821-1-sashal@kernel.org> MIME-Version: 1.0 X-stable: review X-Patchwork-Hint: Ignore Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: Ravulapati Vishnu Vardhan Rao [ Upstream commit e5e7e398f6bb7918dab0612eb6991f7bae95520d ] When we run syzkaller we get below Out of Bound. "KASAN: slab-out-of-bounds Read in regcache_flat_read" Below is the backtrace of the issue: dump_backtrace+0x0/0x4c8 show_stack+0x34/0x44 dump_stack_lvl+0xd8/0x118 print_address_description+0x30/0x2d8 kasan_report+0x158/0x198 __asan_report_load4_noabort+0x44/0x50 regcache_flat_read+0x10c/0x110 regcache_read+0xf4/0x180 _regmap_read+0xc4/0x278 _regmap_update_bits+0x130/0x290 regmap_update_bits_base+0xc0/0x15c snd_soc_component_update_bits+0xa8/0x22c snd_soc_component_write_field+0x68/0xd4 tx_macro_digital_mute+0xec/0x140 Actually There is no need to have decimator with 32 bits. By limiting the variable with short type u8 issue is resolved. Signed-off-by: Ravulapati Vishnu Vardhan Rao Link: https://lore.kernel.org/r/20230304080702.609-1-quic_visr@quicinc.com Signed-off-by: Mark Brown Signed-off-by: Sasha Levin --- sound/soc/codecs/lpass-tx-macro.c | 11 ++++++----- 1 file changed, 6 insertions(+), 5 deletions(-) diff --git a/sound/soc/codecs/lpass-tx-macro.c b/sound/soc/codecs/lpass-tx-macro.c index 2449a2df66df0..8facdb922f076 100644 --- a/sound/soc/codecs/lpass-tx-macro.c +++ b/sound/soc/codecs/lpass-tx-macro.c @@ -242,7 +242,7 @@ enum { struct tx_mute_work { struct tx_macro *tx; - u32 decimator; + u8 decimator; struct delayed_work dwork; }; @@ -635,7 +635,7 @@ static int tx_macro_mclk_enable(struct tx_macro *tx, return 0; } -static bool is_amic_enabled(struct snd_soc_component *component, int decimator) +static bool is_amic_enabled(struct snd_soc_component *component, u8 decimator) { u16 adc_mux_reg, adc_reg, adc_n; @@ -849,7 +849,7 @@ static int tx_macro_enable_dec(struct snd_soc_dapm_widget *w, struct snd_kcontrol *kcontrol, int event) { struct snd_soc_component *component = snd_soc_dapm_to_component(w->dapm); - unsigned int decimator; + u8 decimator; u16 tx_vol_ctl_reg, dec_cfg_reg, hpf_gate_reg, tx_gain_ctl_reg; u8 hpf_cut_off_freq; int hpf_delay = TX_MACRO_DMIC_HPF_DELAY_MS; @@ -1064,7 +1064,8 @@ static int tx_macro_hw_params(struct snd_pcm_substream *substream, struct snd_soc_dai *dai) { struct snd_soc_component *component = dai->component; - u32 decimator, sample_rate; + u32 sample_rate; + u8 decimator; int tx_fs_rate; struct tx_macro *tx = snd_soc_component_get_drvdata(component); @@ -1128,7 +1129,7 @@ static int tx_macro_digital_mute(struct snd_soc_dai *dai, int mute, int stream) { struct snd_soc_component *component = dai->component; struct tx_macro *tx = snd_soc_component_get_drvdata(component); - u16 decimator; + u8 decimator; /* active decimator not set yet */ if (tx->active_decimator[dai->id] == -1) -- 2.39.2