[PATCH] ASoC: soc-core: fix null-ptr-deref in snd_soc_del_component_unlocked()

[Mark Brown]

On Sat, 9 Oct 2021 14:58:40 +0800, Yang Yingliang wrote:
> 'component' is allocated in snd_soc_register_component(), but component->list
> is not initalized, this may cause snd_soc_del_component_unlocked() deref null
> ptr in the error handing case.
> 
> KASAN: null-ptr-deref in range [0x0000000000000000-0x0000000000000007]
> RIP: 0010:__list_del_entry_valid+0x81/0xf0
> Call Trace:
>  snd_soc_del_component_unlocked+0x69/0x1b0 [snd_soc_core]
>  snd_soc_add_component.cold+0x54/0x6c [snd_soc_core]
>  snd_soc_register_component+0x70/0x90 [snd_soc_core]
>  devm_snd_soc_register_component+0x5e/0xd0 [snd_soc_core]
>  tas2552_probe+0x265/0x320 [snd_soc_tas2552]
>  ? tas2552_component_probe+0x1e0/0x1e0 [snd_soc_tas2552]
>  i2c_device_probe+0xa31/0xbe0
> 
> [...]

Applied to

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

Thanks!

[1/1] ASoC: soc-core: fix null-ptr-deref in snd_soc_del_component_unlocked()
      commit: c448b7aa3e66042fc0f849d9a0fb90d1af82e948

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
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Thanks,
Mark