From nobody Fri Apr 3 21:13:09 2026 Received: from cstnet.cn (smtp81.cstnet.cn [159.226.251.81]) (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 C12B03988EB; Mon, 23 Mar 2026 12:17:33 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=159.226.251.81 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1774268255; cv=none; b=aw7UaaWlQsqVdxQhRZVP4ln0H+s7MPDL0+J6zuOvFjN+9PmTUkuziZr6PqfislsmjIToiEk4YF0fk28VcVVZGLCrzZb6SVA4LhOnCO3qycW6Mpl7G/4aj3OpMhbDfJlO8TVDluvZuO0v5B2UVe2we2Hr29OXaT5A1bzcMbn69fU= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1774268255; c=relaxed/simple; bh=7w9S97cs5Ew9zMwYJIzH7eCfDFY0Pfsymo9FiV4fBes=; h=From:To:Cc:Subject:Date:Message-ID:MIME-Version; b=NrdymNJv/itl6vlz9T4FNzMARMs7kNLAcJ+UeaC4xY/DMcTRQrdIHptzSZzfpgqyAQscmqbYAN9RX0ZaRyKsWfXZ2bN9gNqeEjSHAwVMo9BPp6xuZCz4tAI+o6enciapEkGO5TdAbbDJNTLCZYB65GArh62IrYxYm3XlqxYKaDI= 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=159.226.251.81 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 [111.196.245.197]) by APP-03 (Coremail) with SMTP id rQCowAD3EtpbL8FpX4uMCw--.14474S2; Mon, 23 Mar 2026 20:17:31 +0800 (CST) From: Pengpeng Hou To: justin.chen@broadcom.com Cc: alcooperx@gmail.com, bcm-kernel-feedback-list@broadcom.com, gregkh@linuxfoundation.org, linux-usb@vger.kernel.org, linux-kernel@vger.kernel.org, pengpeng@iscas.ac.cn Subject: [PATCH] usb: gadget: bdc: validate status-report endpoint indices Date: Mon, 23 Mar 2026 20:17:30 +0800 Message-ID: <20260323121730.75245-1-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: rQCowAD3EtpbL8FpX4uMCw--.14474S2 X-Coremail-Antispam: 1UD129KBjvJXoW7Wr45tw18WFyUJr45Gw1xZrb_yoW8JrWxpF s7trWjyrWDA39rtF12qa1UuFWfKanrGryDXay7Kw1UuF15Xr45Cr4rGa4fWFsxKF97Aw42 vF4vqw1DJF48CFJanT9S1TB71UUUUU7qnTZGkaVYY2UrUUUUjbIjqfuFe4nvWSU5nxnvy2 9KBjDU0xBIdaVrnRJUUUkG14x267AKxVW8JVW5JwAFc2x0x2IEx4CE42xK8VAvwI8IcIk0 rVWrJVCq3wAFIxvE14AKwVWUJVWUGwA2ocxC64kIII0Yj41l84x0c7CEw4AK67xGY2AK02 1l84ACjcxK6xIIjxv20xvE14v26r4j6ryUM28EF7xvwVC0I7IYx2IY6xkF7I0E14v26r4j 6F4UM28EF7xvwVC2z280aVAFwI0_GcCE3s1l84ACjcxK6I8E87Iv6xkF7I0E14v26rxl6s 0DM2AIxVAIcxkEcVAq07x20xvEncxIr21l5I8CrVACY4xI64kE6c02F40Ex7xfMcIj6xII jxv20xvE14v26r106r15McIj6I8E87Iv67AKxVW8JVWxJwAm72CE4IkC6x0Yz7v_Jr0_Gr 1lF7xvr2IYc2Ij64vIr41lF7I21c0EjII2zVCS5cI20VAGYxC7MxkF7I0En4kS14v26r12 6r1DMxAIw28IcxkI7VAKI48JMxC20s026xCaFVCjc4AY6r1j6r4UMI8I3I0E5I8CrVAFwI 0_Jr0_Jr4lx2IqxVCjr7xvwVAFwI0_JrI_JrWlx4CE17CEb7AF67AKxVWUAVWUtwCIc40Y 0x0EwIxGrwCI42IY6xIIjxv20xvE14v26r1j6r1xMIIF0xvE2Ix0cI8IcVCY1x0267AKxV W8JVWxJwCI42IY6xAIw20EY4v20xvaj40_Jr0_JF4lIxAIcVC2z280aVAFwI0_Gr0_Cr1l IxAIcVC2z280aVCY1x0267AKxVW8Jr0_Cr1UYxBIdaVFxhVjvjDU0xZFpf9x0JUvXd8UUU UU= X-CM-SenderInfo: pshqw1xhqjqxpvfd2hldfou0/ Content-Type: text/plain; charset="utf-8" bdc_sr_xsf() decodes a 5-bit endpoint number from the hardware status report and uses it to index bdc->bdc_ep_array[] directly. The array is only allocated to bdc->num_eps for the current controller instance, so a status report can carry an endpoint number that still fits the 5-bit field but does not fit the runtime-sized endpoint table. Reject status reports whose endpoint number is outside bdc->num_eps before indexing the endpoint array. Signed-off-by: Pengpeng Hou Reviewed-by: Florian Fainelli Tested-by: Justin Chen --- drivers/usb/gadget/udc/bdc/bdc_ep.c | 4 ++++ 1 file changed, 4 insertions(+) diff --git a/drivers/usb/gadget/udc/bdc/bdc_ep.c b/drivers/usb/gadget/udc/b= dc/bdc_ep.c index c0ab3347059a..a7a22e5ec47b 100644 --- a/drivers/usb/gadget/udc/bdc/bdc_ep.c +++ b/drivers/usb/gadget/udc/bdc/bdc_ep.c @@ -1647,6 +1647,10 @@ void bdc_sr_xsf(struct bdc *bdc, struct bdc_sr *srep= ort) u8 ep_num; =20 ep_num =3D (le32_to_cpu(sreport->offset[3])>>4) & 0x1f; + if (ep_num >=3D bdc->num_eps) { + dev_err(bdc->dev, "xsf for invalid ep %u\n", ep_num); + return; + } ep =3D bdc->bdc_ep_array[ep_num]; if (!ep || !(ep->flags & BDC_EP_ENABLED)) { dev_err(bdc->dev, "xsf for ep not enabled\n"); --=20 2.50.1 (Apple Git-155)