linux-kernel - Re: [PATCH v3] staging: rtl8723bs: fix potential race in expire_timeout

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Message-ID: <aXx05zTOJeCyQ5zo@stanley.mountain>
Date: Fri, 30 Jan 2026 12:07:51 +0300
From: Dan Carpenter <dan.carpenter@...aro.org>
To: Minu Jin <s9430939@...er.com>
Cc: gregkh@...uxfoundation.org, bqn9090@...il.com,
	abrahamadekunle50@...il.com, straube.linux@...il.com,
	bryant.boatright@...ton.me, davidzalman.101@...il.com,
	linux-staging@...ts.linux.dev, linux-kernel@...r.kernel.org
Subject: Re: [PATCH v3] staging: rtl8723bs: fix potential race in
 expire_timeout_chk

On Thu, Jan 29, 2026 at 09:33:42PM +0900, Minu Jin wrote:
> The expire_timeout_chk function currently do lock and unlock inside the
> loop before calling rtw_free_stainfo().
> 
> This can be risky as the list might be changed
> when the lock is briefly released.
> 
> To fix this, move expired sta_info entries into a local free_list while
> holding the lock, and then perform the actual freeing after the lock is
> released.
> 
> Signed-off-by: Minu Jin <s9430939@...er.com>
> ---
> Changes in v3:
>     Suggested-by Dan Carpenter
>     - Use list_for_each_entry_safe() only for the new code.
>     - Remove blank line in the declaration block.
>     - Keep existing code unchanged

Thanks!

Reviewed-by: Dan Carpenter <dan.carpenter@...aro.org>

regards,
dan carpenter