Re: [PATCH wireless 1/9] wifi: cfg80211: avoid garbage value of 'io_type' in brcmf_cfg80211_attach()

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On July 2, 2024 5:29:27 PM Kalle Valo <kvalo@xxxxxxxxxx> wrote:

Arend Van Spriel <arend.vanspriel@xxxxxxxxxxxx> writes:

On July 2, 2024 3:57:27 PM Dan Carpenter <dan.carpenter@xxxxxxxxxx> wrote:

On Tue, Jul 02, 2024 at 08:24:44PM +0800, Su Hui wrote:
brcmf_fil_cmd_int_get() reads the value of 'io_type' and passes it to
brcmf_fil_cmd_data_get(). Initialize 'io_type' to avoid garbage value.

Since you're going to be resending anyway, please delete the space char
from the start of the line.

It's weird that brcmf_fil_cmd_data_get() uses the uninitialized data.
It looks like it just goes to great lengths to preserve the original
data in io_type...  So it likely is harmless enough but still a strange
and complicated way write a no-op.

Not sure if it helps, but I tried to explain the reason in response to
patch 0 (cover letter).

Would it make more sense to have just one patch? It's the same issue
anyway.

Yes, but I would solve it in brcmf_fil_* functions (fwil.[ch]).

Regards,
Arend

--
https://patchwork.kernel.org/project/linux-wireless/list/

https://wireless.wiki.kernel.org/en/developers/documentation/submittingpatches



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