Re: [PATCH] ASoC: rsnd: Fix potential out-of-bounds access of component_dais[]

[Kuninori Morimoto]

Hi

> From: Denis Rastyogin <gerben@xxxxxxxxxxxx>
> 
> component_dais[RSND_MAX_COMPONENT] is initially zero-initialized
> and later populated in rsnd_dai_of_node(). However, the existing boundary check:
>   if (i >= RSND_MAX_COMPONENT)
> 
> does not guarantee that the last valid element remains zero. As a result,
> the loop can rely on component_dais[RSND_MAX_COMPONENT] being zero,
> which may lead to an out-of-bounds access.
> 
> Found by Linux Verification Center (linuxtesting.org) with SVACE.
> 
> Fixes: 547b02f74e4a ("ASoC: rsnd: enable multi Component support for Audio Graph Card/Card2")
> Signed-off-by: Denis Rastyogin <gerben@xxxxxxxxxxxx>
> ---

Acked-by: Kuninori Morimoto <kuninori.morimoto.gx@xxxxxxxxxxx>

# I'm not sure why, but sometimes the mail is not comming to my mailbox
# even though it has To/Cc to me.
# I couldn't find it on spam folder either...
# I have noticed this patch via lore.kernel.org

Thank you for your help !!

Best regards
---
Kuninori Morimoto