linux-kernel - Re: [PATCH v2] ASoC:codecs: lpass: Fix for KASAN use_after

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Message-Id: <168443106443.480335.16812738995271810180.b4-ty@kernel.org>
Date:   Fri, 19 May 2023 02:31:04 +0900
From:   Mark Brown <broonie@...nel.org>
To:     Ravulapati Vishnu Vardhan Rao <quic_visr@...cinc.com>
Cc:     Srinivas Kandagatla <srinivas.kandagatla@...aro.org>,
        Banajit Goswami <bgoswami@...cinc.com>,
        Liam Girdwood <lgirdwood@...il.com>,
        Jaroslav Kysela <perex@...ex.cz>,
        Takashi Iwai <tiwai@...e.com>,
        "moderated list:QCOM AUDIO (ASoC) DRIVERS" 
        <alsa-devel@...a-project.org>,
        open list <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH v2] ASoC:codecs: lpass: Fix for KASAN use_after_free
 out of bounds

On Thu, 11 May 2023 16:55:32 +0530, Ravulapati Vishnu Vardhan Rao wrote:
> When we run syzkaller we get below Out of Bounds error.
> 
> "KASAN: slab-out-of-bounds Read in regcache_flat_read"
> 
> Below is the backtrace of the issue:
> 
> BUG: KASAN: slab-out-of-bounds in regcache_flat_read+0x10c/0x110
> Read of size 4 at addr ffffff8088fbf714 by task syz-executor.4/14144
> CPU: 6 PID: 14144 Comm: syz-executor.4 Tainted: G        W
> Hardware name: Qualcomm Technologies, Inc. sc7280 CRD platform (rev5+) (DT)
> Call trace:
> dump_backtrace+0x0/0x4ec
> show_stack+0x34/0x50
> dump_stack_lvl+0xdc/0x11c
> print_address_description+0x30/0x2d8
> kasan_report+0x178/0x1e4
> __asan_report_load4_noabort+0x44/0x50
> regcache_flat_read+0x10c/0x110
> regcache_read+0xf8/0x5a0
> _regmap_read+0x45c/0x86c
> _regmap_update_bits+0x128/0x290
> regmap_update_bits_base+0xc0/0x15c
> snd_soc_component_update_bits+0xa8/0x22c
> snd_soc_component_write_field+0x68/0xd4
> tx_macro_put_dec_enum+0x1d0/0x268
> snd_ctl_elem_write+0x288/0x474
> 
> [...]

Applied to

   https://git.kernel.org/pub/scm/linux/kernel/git/broonie/sound.git for-next

Thanks!

[1/1] ASoC:codecs: lpass: Fix for KASAN use_after_free out of bounds
      commit: 75e5fab7db0cecb6e16b22c34608f0b40a4c7cd1

All being well this means that it will be integrated into the linux-next
tree (usually sometime in the next 24 hours) and sent to Linus during
the next merge window (or sooner if it is a bug fix), however if
problems are discovered then the patch may be dropped or reverted.

You may get further e-mails resulting from automated or manual testing
and review of the tree, please engage with people reporting problems and
send followup patches addressing any issues that are reported if needed.

If any updates are required or you are submitting further changes they
should be sent as incremental updates against current git, existing
patches will not be replaced.

Please add any relevant lists and maintainers to the CCs when replying
to this mail.

Thanks,
Mark