From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id C77B954723; Fri, 13 Feb 2026 13:54:24 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=10.30.226.201 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1770990864; cv=none; b=hryb+bYHbJhLsiOiXlVKUjutd6Nq/G+q8rWXyM7krD/UxCjbd6qe6TpvMRApHzohKn+6CiHrwlPIIzJbegmqJZSHXVjOPJv7bksdOpt1Q74L5kW/Sg6eaI/YkSSDXHpTegFC+74Q1Xg0KhUDE7dT/vnO8W9/KN/dY2HgtUVmiL0= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1770990864; c=relaxed/simple; bh=hWm9+rSxN38x3eJ8KT1megsh+OCKA4CEdDcgM/a2NxA=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=Tp9KUohehazys0DsRx65ovwHfpBHjdegfn5gm0XQKAkpiCr51V/UlphGuT52T+N0ycQFQNtFSMSeOn6XjYgyY8sHhsRelUvNJBO8tCyuoQVPMTygquWTIIzQuqvc5/SZ6P32ggS8Ep3Rl+p36Dkilz2NwQbnaG9KCcwI+f8X5uQ= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b=tf4HmBA8; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b="tf4HmBA8" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 3D385C116C6; Fri, 13 Feb 2026 13:54:24 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1770990864; bh=hWm9+rSxN38x3eJ8KT1megsh+OCKA4CEdDcgM/a2NxA=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=tf4HmBA8lR8fsE3mLWtXTB3s0HqeISR1R6dnASQVZecInfLHH/KqU68PmTPbID6TI F/kf7lGQFx9gJHAqNdjKFz8BszudcWpYWo19WQl39oUVG0P23g99SqCQ9FpsCvUV3S bN8tzwYG4oguzFYorlnjn0BQvUHJo17ealHTk5DQ= From: Greg Kroah-Hartman To: stable@vger.kernel.org Cc: Greg Kroah-Hartman , patches@lists.linux.dev, Ali Tariq , Ping-Ke Shih Subject: [PATCH 6.18 48/49] wifi: rtl8xxxu: fix slab-out-of-bounds in rtl8xxxu_sta_add Date: Fri, 13 Feb 2026 14:48:32 +0100 Message-ID: <20260213134710.619466359@linuxfoundation.org> X-Mailer: git-send-email 2.53.0 In-Reply-To: <20260213134708.885500854@linuxfoundation.org> References: <20260213134708.885500854@linuxfoundation.org> User-Agent: quilt/0.69 X-stable: review X-Patchwork-Hint: ignore Precedence: bulk X-Mailing-List: stable@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit 6.18-stable review patch. If anyone has any objections, please let me know. ------------------ From: Ali Tariq commit 86c946bcc00f6390ef65e9614ae60a9377e454f8 upstream. 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@vger.kernel.org Signed-off-by: Ali Tariq Reviewed-by: Ping-Ke Shih Signed-off-by: Ping-Ke Shih Link: https://patch.msgid.link/20251225115430.13011-1-alitariq45892@gmail.com Signed-off-by: Greg Kroah-Hartman --- drivers/net/wireless/realtek/rtl8xxxu/core.c | 1 + 1 file changed, 1 insertion(+) --- a/drivers/net/wireless/realtek/rtl8xxxu/core.c +++ b/drivers/net/wireless/realtek/rtl8xxxu/core.c @@ -7927,6 +7927,7 @@ static int rtl8xxxu_probe(struct usb_int goto err_set_intfdata; hw->vif_data_size = sizeof(struct rtl8xxxu_vif); + hw->sta_data_size = sizeof(struct rtl8xxxu_sta_info); hw->wiphy->max_scan_ssids = 1; hw->wiphy->max_scan_ie_len = IEEE80211_MAX_DATA_LEN;