From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mail-ed1-f42.google.com (mail-ed1-f42.google.com [209.85.208.42]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 960F832D42B for ; Sat, 18 Jul 2026 18:55:15 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.208.42 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1784400917; cv=none; b=lTTAJBU/ns+IsMbkJpJth5HMnbUsxltpC+GrFH9PkcPMxSS9/cLQZatW3ASyuupNYe9adVyUhGQfMSdlycJYyUxC0vCJ3f+iGt1y4ROsZeUsrai/xVYPZyXySvA3XanOCMBhiMUTLf/czfzE+2z00S0cmy2MVJJsx1nxaiIszx0= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1784400917; c=relaxed/simple; bh=MMU5B/GSFrKeMMnz7n6SPGe1UFSUE/LdaDBaAFkUHxg=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=LimPLQf/fIuygi2EHXLjBGYUPTmSsbPbU+HrN/aXG2Qb4MwHdl1nLEthdr34cX7C4D1/fdKtqTtQ9111lzdty6KbnabSAG2KtVhG9V7azMxHLF0fiUjlkuvEUeb+L9uWn96ABb8teml7VR+iELkmid5oVoL75q65bkvutvYoXEE= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=gmail.com; spf=pass smtp.mailfrom=gmail.com; dkim=pass (2048-bit key) header.d=gmail.com header.i=@gmail.com header.b=Mk2zVezU; arc=none smtp.client-ip=209.85.208.42 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=gmail.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=gmail.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=gmail.com header.i=@gmail.com header.b="Mk2zVezU" Received: by mail-ed1-f42.google.com with SMTP id 4fb4d7f45d1cf-6983d3dae7aso3874563a12.0 for ; Sat, 18 Jul 2026 11:55:15 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20251104; t=1784400914; x=1785005714; darn=vger.kernel.org; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:from:to:cc:subject:date :message-id:reply-to:content-type; bh=2Vek9VNoLIBJqK+DxbiXTlmLiZQWFsJV5wa/eMhmj0g=; b=Mk2zVezUEiJqhe+W4LL/Zif1zT61ZPnAU33qFqrY4pUqJbsINE1tLnWIzToTaMuCx9 jJ8Wl+CDwtJmNGmfoX1RaWPi7PSpdSyj63isF32I6qqQZSM9Q2djiwkzYqofiyujSPLB eP+EnFFUSIkgBcHW5rVceNw77qNDI+unA01fidFbO7imBpA64epttHerJjh6U5WuPjBd 1zHu+fEPOwa01qkxJrwELY5cJ4wypvfG8ySUdTcImamQqhgJQuvFtWDHNXNdjWgw9ZNT SrNEdVLRxwkV9RDAVGa1pLSsCiFCLj0wwtHmh/zbU2c2Bw0QaKDY+umJ615G+Y+bpB+0 kFKQ== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20251104; t=1784400914; x=1785005714; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:x-gm-gg:x-gm-message-state:from :to:cc:subject:date:message-id:reply-to:content-type; bh=2Vek9VNoLIBJqK+DxbiXTlmLiZQWFsJV5wa/eMhmj0g=; b=FGn38DMEuKdyMYGZSN+PX8arpwMv+Ha7r2ekYeaHT5ENTOmDYFQRE3S3QNoWd9nq/I 7HDLVlrYfJd1lMATxYxp+xelKunzWTcuwX3JlH+CAK5j6zY6JtvMZIn/BnQr68Y8Aysz pYPvH+4CtGka7R6moPsJNeH8U87Azscj6aAUb69y0QAhAvTBs03cyA3WtPsipKam7mxc M1iHQs6P5e3xfz5rf6ya+Tv8r/2QtfGRxgT7ZpPpcfmsanhLkcdPo9bWcOG8Um4tMSnq ZfPZG6vnpqIkahnJCfuyjj++96HxeRkXN+f9MzoXn6Qg/l6zVvrvF4X8sO6PRrIjtLaC vwCg== X-Forwarded-Encrypted: i=1; AHgh+Rr9xbxlbbb8ogdQLFbkyaJ+wMMCiaz61UqPDwvKxRFgZCz+vsDGNb7iashykzHRy32pjpQuxPYGJlACPWU=@vger.kernel.org X-Gm-Message-State: AOJu0Yx6zKjggkyIz6ppinrFvA5cCC6SM8rPF6mPSk2lSt+9J4cNN5oY 6hOxKOjqgE69X37RXEHq6FI7kzE7WGzDIyca3wenUnpuOtTdxi2lHbo/ X-Gm-Gg: AfdE7cmUDWWXgDeaLzGVEUIrJ5eMll6hVysUJiboHunv3hOyQQwK9RrKpXNtSvM0bMf 32+jMyCcEqw4n6xbRnURarD6qe3u9DWcUWf5eY9GV6qSybRk+EZMZ5FOsxYV8VRTdFLxgE1xv56 XmhowsSABwBTENEj1WSif7WvUSDxW3k8UO2cwRvK2I7NtzV943s17ypSVXx8FFl1JW632BF4rj6 5qn9CkTu2qOVI3dFi0KkcpUSwhflsDI8SHc3tchlCPeA8bbwCJJeE+ZRs/sBelCtZZC2a5yjnVx kq+uXAOySY1YYvC4c4LixjvjfXS/Xso7yYRiF0eyBoHXpUGWgaJP2XaVGd99vM83hHgOnKtBFQ/ is+TAJBgnZd8IQMVM2SdLvW6l3ORJR6pq12aoh3Pq6ui0CfDhNcOdjSThaSWYDdOZwvCogNm1Vg nQbDBv8bkoohAjV+LH/NNk2yAqp3pWSCCDjQD52Gqj8me5Nl9UkCpbqGM= X-Received: by 2002:a17:907:1903:b0:c15:a7b9:2ae1 with SMTP id a640c23a62f3a-c16b40031acmr390800166b.6.1784400913719; Sat, 18 Jul 2026 11:55:13 -0700 (PDT) Received: from fedora ([202.47.63.86]) by smtp.gmail.com with ESMTPSA id a640c23a62f3a-c1712a5f837sm249151866b.32.2026.07.18.11.55.11 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Sat, 18 Jul 2026 11:55:13 -0700 (PDT) From: Muhammad Bilal To: Greg Kroah-Hartman Cc: linux-staging@lists.linux.dev, linux-kernel@vger.kernel.org, stable@vger.kernel.org, Muhammad Bilal Subject: [PATCH 1/5] staging: rtl8723bs: fix OOB read in rtw_get_wps_ie() Date: Sat, 18 Jul 2026 23:54:41 +0500 Message-ID: <20260718185445.63070-2-meatuni001@gmail.com> X-Mailer: git-send-email 2.55.0 In-Reply-To: <20260718185445.63070-1-meatuni001@gmail.com> References: <20260718185445.63070-1-meatuni001@gmail.com> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit rtw_get_wps_ie() walks a series of information elements taken directly from received/associated wireless management frames (beacons, probe responses, scan results). The loop condition only checks "cnt < in_len" before reading in_ie[cnt + 1] (the IE length byte) and before a 4-byte memcmp() at &in_ie[cnt + 2], with no check that those offsets are actually within in_len. A malicious or malformed IE blob (e.g. a truncated vendor-specific IE placed near the end of the buffer) can therefore make this function read past the end of in_ie by up to several bytes, both in the loop condition path and via memcpy(wps_ie, &in_ie[cnt], in_ie[cnt + 1] + 2) when a spurious match occurs. The sibling helpers rtw_get_sec_ie() and rtw_get_wapi_ie() in this same file already perform the equivalent "cnt + 2 > in_len" / "cnt + 2 + in_ie[cnt + 1] > in_len" checks, added to those two functions by commit 1463ca3ec660 ("staging: rtl8723bs: fix OOB reads in rtw_get_sec_ie(), rtw_get_wapi_ie(), and rtw_get_wps_attr()"). rtw_get_wps_ie() was simply never brought in line with them. Add the same checks here, plus a length check before the 4-byte OUI memcmp. Fixes: 554c0a3abf216 ("staging: Add rtl8723bs sdio wifi driver") Cc: stable@vger.kernel.org Signed-off-by: Muhammad Bilal --- drivers/staging/rtl8723bs/core/rtw_ieee80211.c | 8 +++++++- 1 file changed, 7 insertions(+), 1 deletion(-) diff --git a/drivers/staging/rtl8723bs/core/rtw_ieee80211.c b/drivers/staging/rtl8723bs/core/rtw_ieee80211.c index 54f805a6b5ce..2fb5863dbeef 100644 --- a/drivers/staging/rtl8723bs/core/rtw_ieee80211.c +++ b/drivers/staging/rtl8723bs/core/rtw_ieee80211.c @@ -668,9 +668,15 @@ u8 *rtw_get_wps_ie(u8 *in_ie, uint in_len, u8 *wps_ie, uint *wps_ielen) cnt = 0; while (cnt < in_len) { + if (cnt + 2 > in_len) + break; + if (cnt + 2 + in_ie[cnt + 1] > in_len) + break; + eid = in_ie[cnt]; - if ((eid == WLAN_EID_VENDOR_SPECIFIC) && (!memcmp(&in_ie[cnt + 2], wps_oui, 4))) { + if ((eid == WLAN_EID_VENDOR_SPECIFIC) && (in_ie[cnt + 1] >= 4) && + (!memcmp(&in_ie[cnt + 2], wps_oui, 4))) { wpsie_ptr = &in_ie[cnt]; if (wps_ie) -- 2.55.0