From nobody Fri Jul 24 21:30:26 2026 Received: from mailgw.kylinos.cn (mailgw.kylinos.cn [124.126.103.232]) (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 7480D3DA7E6; Fri, 24 Jul 2026 10:37:11 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=124.126.103.232 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1784889435; cv=none; b=N/8/sHyrOqvbUm30ThUs/tAQIXWs5TtLr7wboYzxj3xdfFmPjzV1gyUuLBArhjCy+P8IN5yh/mRspldioU4aoM9Lhvzm+V26ngL+GYeJVfEInTmZaeSLpDklJ+C02GJhmVOC2P8Es+jHG5YBtghZEVzvAeU9IKblTt+WuKEd83Y= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1784889435; c=relaxed/simple; bh=R/i/aHgpKv3Scl17qepOTnnc2xP+h6vITMgwSn+nm3Q=; h=From:To:Cc:Subject:Date:Message-Id:MIME-Version; b=Ohz0Nbm2J4fIeIhPUqSJqKhS+DfpcysKKlcR44lVsLKJWkJHjmHABLojRowMg+Pl89xwgTjx7AhrC3F+w9G8cCoyqysJ2aSpeV/56OamBRRRHCZ0ssezsBiHmwNjIKhIiUzpLk9vX7dbpggcFAY0KtCQq3UMxAOVM44Lyekzp8M= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=none (p=none dis=none) header.from=kylinos.cn; spf=pass smtp.mailfrom=kylinos.cn; arc=none smtp.client-ip=124.126.103.232 Authentication-Results: smtp.subspace.kernel.org; dmarc=none (p=none dis=none) header.from=kylinos.cn Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=kylinos.cn X-UUID: 9c6c06e4874b11f1aa26b74ffac11d73-20260724 X-CID-P-RULE: Release_Ham X-CID-O-INFO: VERSION:1.3.12,REQID:6338399d-df22-42db-b359-a5659eb6d23a,IP:0,U RL:0,TC:0,Content:0,EDM:0,RT:0,SF:0,FILE:0,BULK:0,RULE:Release_Ham,ACTION: release,TS:0 X-CID-META: VersionHash:e7bac3a,CLOUDID:6ba0d886da9cc77b5f940ce638163862,BulkI D:nil,BulkQuantity:0,Recheck:0,SF:102|850|865|898,TC:nil,Content:0|15|50,E DM:-3,IP:nil,URL:0,File:nil,RT:nil,Bulk:nil,QS:nil,BEC:nil,COL:0,OSI:0,OSA :0,AV:0,LES:1,SPR:NO,DKR:0,DKP:0,BRR:0,BRE:0,ARC:0 X-CID-BVR: 2,SSN|SDN X-CID-BAS: 2,SSN|SDN,0,_ X-CID-FACTOR: TF_CID_SPAM_SNR X-CID-RHF: D41D8CD98F00B204E9800998ECF8427E X-UUID: 9c6c06e4874b11f1aa26b74ffac11d73-20260724 X-User: lilinmao@kylinos.cn Received: from localhost.localdomain [(10.44.16.150)] by mailgw.kylinos.cn (envelope-from ) (Generic MTA with TLSv1.3 TLS_AES_256_GCM_SHA384 256/256) with ESMTP id 1864914623; Fri, 24 Jul 2026 18:37:04 +0800 From: Linmao Li To: Jeff Chen Cc: Francesco Dolcini , Johannes Berg , linux-wireless@vger.kernel.org, linux-kernel@vger.kernel.org, Linmao Li Subject: [PATCH wireless-next] wifi: nxpwifi: reject zero-length extension elements in beacon IEs Date: Fri, 24 Jul 2026 18:36:56 +0800 Message-Id: <20260724103656.2494129-1-lilinmao@kylinos.cn> X-Mailer: git-send-email 2.25.1 Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset="utf-8" nxpwifi_update_bss_desc_with_ie() dispatches on elem->data[0] for WLAN_EID_EXTENSION without checking that the element has a payload. A well-formed extension element carries at least the element ID extension byte, but nothing enforces that in the IE stream, and the loop accepts a zero-length element because its header alone fits. elem->data[0] then reads the byte after the element, which is past the kmemdup()ed IE buffer when that element ends the stream. Fixes: 73b01e57ed3e ("wifi: nxp: add nxpwifi driver for IW61x") Signed-off-by: Linmao Li --- drivers/net/wireless/nxp/nxpwifi/scan.c | 3 +++ 1 file changed, 3 insertions(+) diff --git a/drivers/net/wireless/nxp/nxpwifi/scan.c b/drivers/net/wireless= /nxp/nxpwifi/scan.c index bb3ce2b6f4b9..b77056983e83 100644 --- a/drivers/net/wireless/nxp/nxpwifi/scan.c +++ b/drivers/net/wireless/nxp/nxpwifi/scan.c @@ -1255,6 +1255,9 @@ int nxpwifi_update_bss_desc_with_ie(struct nxpwifi_ad= apter *adapter, (u16)(current_ptr - bss_entry->beacon_buf); break; case WLAN_EID_EXTENSION: + if (!element_len) + return -EINVAL; + elem =3D (struct element *)current_ptr; =20 switch (elem->data[0]) { --=20 2.25.1