linux-kernel - Re: [PATCH] rtl8xxxu: fix slab-out-of-bounds in rtl8xxxu_sta

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [day] [month] [year] [list]

Message-ID: <f05788ea-fb2d-4152-a4cd-016d4f5e8273@RTKEXHMBS03.realtek.com.tw>
Date: Wed, 31 Dec 2025 16:08:11 +0800
From: Ping-Ke Shih <pkshih@...ltek.com>
To: Ali Tariq <alitariq45892@...il.com>, <Jes.Sorensen@...il.com>
CC: <linux-wireless@...r.kernel.org>, <netdev@...r.kernel.org>,
        <linux-kernel@...r.kernel.org>, <stable@...r.kernel.org>,
        Ali Tariq
	<alitariq45892@...il.com>
Subject: Re: [PATCH] rtl8xxxu: fix slab-out-of-bounds in rtl8xxxu_sta_add

Ali Tariq <alitariq45892@...il.com> wrote:

> The driver does not set hw->sta_data_size, which causes mac80211 to
> allocate insufficient space for driver private station data in
> __sta_info_alloc(). When rtl8xxxu_sta_add() accesses members of
> struct rtl8xxxu_sta_info through sta->drv_priv, this results in a
> slab-out-of-bounds write.
> 
> KASAN report on RISC-V (VisionFive 2) with RTL8192EU adapter:
> 
>   BUG: KASAN: slab-out-of-bounds in rtl8xxxu_sta_add+0x31c/0x346
>   Write of size 8 at addr ffffffd6d3e9ae88 by task kworker/u16:0/12
> 
> Set hw->sta_data_size to sizeof(struct rtl8xxxu_sta_info) during
> probe, similar to how hw->vif_data_size is configured. This ensures
> mac80211 allocates sufficient space for the driver's per-station
> private data.
> 
> Tested on StarFive VisionFive 2 v1.2A board.
> 
> Fixes: eef55f1545c9 ("wifi: rtl8xxxu: support multiple interfaces in {add,remove}_interface()")
> 
> Cc: stable@...r.kernel.org
> 
> Signed-off-by: Ali Tariq <alitariq45892@...il.com>
> Reviewed-by: Ping-Ke Shih <pkshih@...ltek.com>

1 patch(es) applied to rtw-next branch of rtw.git, thanks.

86c946bcc00f wifi: rtl8xxxu: fix slab-out-of-bounds in rtl8xxxu_sta_add

---
https://github.com/pkshih/rtw.git