From nobody Fri Jul 24 23:30:59 2026 Received: from cstnet.cn (smtp25.cstnet.cn [159.226.251.25]) (using TLSv1.2 with cipher DHE-RSA-AES256-SHA (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 9D6543C5837; Wed, 22 Jul 2026 04:07:31 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=159.226.251.25 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1784693256; cv=none; b=b1X1OCrGK6JJKZ9HLHQGsBhGc5Qb6UvOQjVMIg9r1O14yucKQKJtQ/HarEp7E2LvCWYFFCczwOHtsr6oTGSorWgTkr8YDxUADJMh50BHDCxgaTM1Yq+pbKvo5WJqCpYSHujRb0cF7USjKqmW56ozs5SFdgNghe0lZ53H3dYkriY= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1784693256; c=relaxed/simple; bh=9k1+dnpfmtAWF0KXRcKDakGmXWB/ADwzlyGhjbNb12Q=; h=From:To:Cc:Subject:Date:Message-ID:MIME-Version; b=EBElP6/guhV2TtAQzll4eONUt0k0uyYCnjzBQA30GyM81j9E6v9dRBCYjk2IYfOOfb4Td8EDq0tL94BKfCygD4/vCrdf081oLXffmEQX/PWF4rtKnlcNjKlNrz2mTzoT1DILsc4MD9C3lSsOrb0ZRMbfctbOZaCSLZH5vUsHA4c= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=none (p=none dis=none) header.from=iscas.ac.cn; spf=pass smtp.mailfrom=iscas.ac.cn; arc=none smtp.client-ip=159.226.251.25 Authentication-Results: smtp.subspace.kernel.org; dmarc=none (p=none dis=none) header.from=iscas.ac.cn Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=iscas.ac.cn Received: from localhost.localdomain (unknown [111.196.245.140]) by APP-05 (Coremail) with SMTP id zQCowAAnlT_6QWBqMf26AA--.23657S2; Wed, 22 Jul 2026 12:07:23 +0800 (CST) From: Pengpeng Hou To: linux-wireless@vger.kernel.org Cc: linux-kernel@vger.kernel.org, Pengpeng Hou Subject: [PATCH] ath6kl: avoid advancing node count past node map Date: Wed, 22 Jul 2026 12:07:21 +0800 Message-ID: <20260722040721.74876-1-pengpeng@iscas.ac.cn> X-Mailer: git-send-email 2.50.1 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 X-CM-TRANSID: zQCowAAnlT_6QWBqMf26AA--.23657S2 X-Coremail-Antispam: 1UD129KBjvJXoWrtry3Gr48WrW8Wr4kKrWUtwb_yoW8Jr1xpF 4xK395Ar1qqr4UW3yIya18JF98tay5trZrCF4jy3y3Cr1DAryrKFn8WFy7Wrn8tF48Wa1a vF42qryDJF90q3DanT9S1TB71UUUUU7qnTZGkaVYY2UrUUUUjbIjqfuFe4nvWSU5nxnvy2 9KBjDU0xBIdaVrnRJUUUym14x267AKxVWUJVW8JwAFc2x0x2IEx4CE42xK8VAvwI8IcIk0 rVWrJVCq3wAFIxvE14AKwVWUJVWUGwA2ocxC64kIII0Yj41l84x0c7CEw4AK67xGY2AK02 1l84ACjcxK6xIIjxv20xvE14v26r4j6ryUM28EF7xvwVC0I7IYx2IY6xkF7I0E14v26r4j 6F4UM28EF7xvwVC2z280aVAFwI0_Cr1j6rxdM28EF7xvwVC2z280aVCY1x0267AKxVWxJr 0_GcWle2I262IYc4CY6c8Ij28IcVAaY2xG8wAqx4xG64xvF2IEw4CE5I8CrVC2j2WlYx0E 2Ix0cI8IcVAFwI0_Jr0_Jr4lYx0Ex4A2jsIE14v26r1j6r4UMcvjeVCFs4IE7xkEbVWUJV W8JwACjcxG0xvY0x0EwIxGrwACjI8F5VA0II8E6IAqYI8I648v4I1l42xK82IYc2Ij64vI r41l4I8I3I0E4IkC6x0Yz7v_Jr0_Gr1lx2IqxVAqx4xG67AKxVWUJVWUGwC20s026x8Gjc xK67AKxVWUGVWUWwC2zVAF1VAY17CE14v26r1Y6r17MIIYrxkI7VAKI48JMIIF0xvE2Ix0 cI8IcVAFwI0_Jr0_JF4lIxAIcVC0I7IYx2IY6xkF7I0E14v26r1j6r4UMIIF0xvE42xK8V AvwI8IcIk0rVWUJVWUCwCI42IY6I8E87Iv67AKxVWUJVW8JwCI42IY6I8E87Iv6xkF7I0E 14v26r1j6r4UYxBIdaVFxhVjvjDU0xZFpf9x0JUywZ7UUUUU= X-CM-SenderInfo: pshqw1xhqjqxpvfd2hldfou0/ Content-Type: text/plain; charset="utf-8" node_map has MAX_NODE_NUM entries. When a new IBSS peer arrives after the map is full, ath6kl_ibss_map_epid() currently increments node_num before rejecting the mapping. The failed request therefore leaves node_num one larger than the array. A later call walks node_map up to node_num while looking for an existing peer, which can read beyond the array. Reject the new mapping before advancing node_num. Signed-off-by: Pengpeng Hou --- drivers/net/wireless/ath/ath6kl/txrx.c | 5 ++--- 1 file changed, 2 insertions(+), 3 deletions(-) diff --git a/drivers/net/wireless/ath/ath6kl/txrx.c b/drivers/net/wireless/= ath/ath6kl/txrx.c index 97fdac7237e2..3b0033431b29 100644 --- a/drivers/net/wireless/ath/ath6kl/txrx.c +++ b/drivers/net/wireless/ath/ath6kl/txrx.c @@ -67,10 +67,9 @@ static u8 ath6kl_ibss_map_epid(struct sk_buff *skb, stru= ct net_device *dev, } =20 if (ep_map =3D=3D -1) { - ep_map =3D ar->node_num; - ar->node_num++; - if (ar->node_num > MAX_NODE_NUM) + if (ar->node_num >=3D MAX_NODE_NUM) return ENDPOINT_UNUSED; + ep_map =3D ar->node_num++; } =20 memcpy(ar->node_map[ep_map].mac_addr, eth_hdr->h_dest, ETH_ALEN); --=20 2.43.0