From nobody Tue Feb 10 02:00:26 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 8B45630E0CE; Wed, 24 Dec 2025 09:38:54 +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=1766569137; cv=none; b=NYpqQaAEdMwdbq9fLzg4SRn6AV1WTW9fh5Zr/BVXmD6Sr+byHIhaBwhO83e8k5uFXAtF/He0I7cWF2EzntPwONhohCMBwJ6A4u1MwPzY4XpAWLkYPHXZspm2abUzHkIcNIcKxb1bxU8YpbtagnZEjb7evSic8tOj++W13wjgzuA= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1766569137; c=relaxed/simple; bh=C5wzQhoy2QIsfMc4wnniP+p1geEoUa39/BumWfgm+s0=; h=From:To:Cc:Subject:Date:Message-Id:MIME-Version; b=k064kawcgaBxIP02NOH28TK4u1Foz6M60NRxzve3iOmH9vC9SIMEraL1DmD9kypoyZk2zJ/fH2YNOelxM1LFkjqbSpjtv939bm3R0MKSbTabXTgITHwfpg26E4oZC7MItI+8L/1utpwafF/KQIbnYxsbvJ/GudhdGZHgYBLIufI= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=none (p=none dis=none) header.from=isrc.iscas.ac.cn; spf=pass smtp.mailfrom=isrc.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=isrc.iscas.ac.cn Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=isrc.iscas.ac.cn Received: from localhost.localdomain (unknown [36.112.3.209]) by APP-03 (Coremail) with SMTP id rQCowADnANimtEtpJw_SAQ--.6418S2; Wed, 24 Dec 2025 17:38:46 +0800 (CST) From: Haoxiang Li To: pawell@cadence.com, gregkh@linuxfoundation.org Cc: linux-usb@vger.kernel.org, linux-kernel@vger.kernel.org, Haoxiang Li , stable@vger.kernel.org Subject: [PATCH] usb: cdns2: fix a null pointer dereference in cdns2_gadget_ep_queue() Date: Wed, 24 Dec 2025 17:38:45 +0800 Message-Id: <20251224093845.1578894-1-lihaoxiang@isrc.iscas.ac.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 X-CM-TRANSID: rQCowADnANimtEtpJw_SAQ--.6418S2 X-Coremail-Antispam: 1UD129KBjvdXoWrtrW5XF1fur4rXrW7uw4UArb_yoWDJFgEkr 4j939rCrW5Wwn0yw48Aw13uryjg3WxX3WkWF4DtF15A3yqgw1fAry5Xr95CF17ur4UGF1v y3s5t3ZxCFn8WjkaLaAFLSUrUUUUjb8apTn2vfkv8UJUUUU8Yxn0WfASr-VFAUDa7-sFnT 9fnUUIcSsGvfJTRUUUb48FF20E14v26r1j6r4UM7CY07I20VC2zVCF04k26cxKx2IYs7xG 6r1S6rWUM7CIcVAFz4kK6r1j6r18M28lY4IEw2IIxxk0rwA2F7IY1VAKz4vEj48ve4kI8w A2z4x0Y4vE2Ix0cI8IcVAFwI0_Jr0_JF4l84ACjcxK6xIIjxv20xvEc7CjxVAFwI0_Gr0_ Cr1l84ACjcxK6I8E87Iv67AKxVW8JVWxJwA2z4x0Y4vEx4A2jsIEc7CjxVAFwI0_Gr0_Gr 1UM2AIxVAIcxkEcVAq07x20xvEncxIr21l5I8CrVACY4xI64kE6c02F40Ex7xfMcIj6xII jxv20xvE14v26r106r15McIj6I8E87Iv67AKxVWUJVW8JwAm72CE4IkC6x0Yz7v_Jr0_Gr 1lF7xvr2IYc2Ij64vIr41lF7I21c0EjII2zVCS5cI20VAGYxC7MxkF7I0En4kS14v26r12 6r1DMxAIw28IcxkI7VAKI48JMxC20s026xCaFVCjc4AY6r1j6r4UMI8I3I0E5I8CrVAFwI 0_Jr0_Jr4lx2IqxVCjr7xvwVAFwI0_JrI_JrWlx4CE17CEb7AF67AKxVWUAVWUtwCIc40Y 0x0EwIxGrwCI42IY6xIIjxv20xvE14v26r1j6r1xMIIF0xvE2Ix0cI8IcVCY1x0267AKxV W8JVWxJwCI42IY6xAIw20EY4v20xvaj40_Jr0_JF4lIxAIcVC2z280aVAFwI0_Jr0_Gr1l IxAIcVC2z280aVCY1x0267AKxVW8JVW8JrUvcSsGvfC2KfnxnUUI43ZEXa7VUbhvttUUUU U== X-CM-SenderInfo: 5olkt0x0ld0ww6lv2u4olvutnvoduhdfq/1tbiBwoGE2lLmnBeDwAAsB Content-Type: text/plain; charset="utf-8" If cdns2_gadget_ep_alloc_request() fails, a null pointer dereference occurs. Add a check to prevent it. Fixes: 3eb1f1efe204 ("usb: cdns2: Add main part of Cadence USBHS driver") Cc: stable@vger.kernel.org Signed-off-by: Haoxiang Li --- drivers/usb/gadget/udc/cdns2/cdns2-gadget.c | 2 ++ 1 file changed, 2 insertions(+) diff --git a/drivers/usb/gadget/udc/cdns2/cdns2-gadget.c b/drivers/usb/gadg= et/udc/cdns2/cdns2-gadget.c index 9b53daf76583..c5b9dae743d8 100644 --- a/drivers/usb/gadget/udc/cdns2/cdns2-gadget.c +++ b/drivers/usb/gadget/udc/cdns2/cdns2-gadget.c @@ -1725,6 +1725,8 @@ static int cdns2_gadget_ep_queue(struct usb_ep *ep, s= truct usb_request *request, struct cdns2_request *preq; =20 zlp_request =3D cdns2_gadget_ep_alloc_request(ep, GFP_ATOMIC); + if (!zlp_request) + return -ENOMEM; zlp_request->buf =3D pdev->zlp_buf; zlp_request->length =3D 0; =20 --=20 2.25.1