linux-kernel - [PATCH V0 0/1] ASoC: msm: fix integer overflow for long duration compress offload playback

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Message-ID: <cover.1646835508.git.quic_rbankapu@quicinc.com>
Date:   Wed, 9 Mar 2022 19:52:27 +0530
From:   Raghu Bankapur <quic_rbankapu@...cinc.com>
To:     Vinod Koul <vkoul@...nel.org>, Jaroslav Kysela <perex@...ex.cz>,
        "Takashi Iwai" <tiwai@...e.com>,
        Raghu Bankapur <quic_rbankapu@...cinc.com>,
        <alsa-devel@...a-project.org>, <linux-kernel@...r.kernel.org>
CC:     Krishna Jha <quic_kkishorj@...cinc.com>
Subject: [PATCH V0 0/1] ASoC: msm: fix integer overflow for long duration compress offload playback

32 bit variable is used for storing number of bytes copied to DSP,
which can overflow when playback duration goes beyond 24 hours.
Change data type for this variable to uint64_t to prevent overflow
and related playback anomaly.

below are the steps used to reproduce
Steps:-
1. play all clips from music app with Repeat All Songs enabled
2. one of clip is 1hr duration - 5.1_16bit_192khz_1hr.m4a
3. ACTUAL BEHAVIOUR:- there is no audio playback & progress bar was at 
end of stream, but time stamp continues to update till 31hrs for 1hr clip

Raghu Bankapur (1):
  ASoC: msm: fix integer overflow for long duration offload playback

 include/uapi/sound/compress_offload.h | 2 +-
 sound/core/compress_offload.c         | 2 +-
 2 files changed, 2 insertions(+), 2 deletions(-)

-- 
2.17.1