Re: [alsa-devel] inconsistent reference counting for snd-soc-skl

On Thu, Oct 13, 2016 at 10:19:37PM +0900, Takashi Sakamoto wrote:

Hi,

I find an issue of snd-soc-skl due to inconsistent reference counting. See this call graph.

skl_probe() ->skl_first_init() ->skl_i915_init() ->snd_hdac_display_power() (CONFIG_SND_SOC_HDAC_HDMI is enabled) ->bus->i915_power_refcount++ ->all error pathes ->skl_free() ->snd_hda_i915_exit() ->WARN_ON(!bus->i915_power_refcount)

This might be also hit by rmmod(8). I see this bug in kernel 4.8 and pre-4.9.

Thanks Takashi for reporting. We will fix this.

Regards, Subhransu

Regards

Takashi Sakamoto

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