linux-kernel - Re: [PATCH] soundwire: stream: fix NULL pointer dereference for multi

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Message-Id: <170116551879.73476.11576514501948917974.b4-ty@kernel.org>
Date:   Tue, 28 Nov 2023 15:28:38 +0530
From:   Vinod Koul <vkoul@...nel.org>
To:     Bard Liao <yung-chuan.liao@...ux.intel.com>,
        Pierre-Louis Bossart <pierre-louis.bossart@...ux.intel.com>,
        Sanyog Kale <sanyog.r.kale@...el.com>,
        Shreyas NC <shreyas.nc@...el.com>, alsa-devel@...a-project.org,
        linux-kernel@...r.kernel.org,
        Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>
Cc:     stable@...r.kernel.org
Subject: Re: [PATCH] soundwire: stream: fix NULL pointer dereference for
 multi_link


On Fri, 24 Nov 2023 19:01:36 +0100, Krzysztof Kozlowski wrote:
> If bus is marked as multi_link, but number of masters in the stream is
> not higher than bus->hw_sync_min_links (bus->multi_link && m_rt_count >=
> bus->hw_sync_min_links), bank switching should not happen.  The first
> part of do_bank_switch() code properly takes these conditions into
> account, but second part (sdw_ml_sync_bank_switch()) relies purely on
> bus->multi_link property.  This is not balanced and leads to NULL
> pointer dereference:
> 
> [...]

Applied, thanks!

[1/1] soundwire: stream: fix NULL pointer dereference for multi_link
      commit: e199bf52ffda8f98f129728d57244a9cd9ad5623

Best regards,
-- 
~Vinod