From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-alma10-1.taild15c8.ts.net [100.103.45.18]) (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 101251474CC for ; Thu, 4 Jun 2026 10:47:59 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=100.103.45.18 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1780570080; cv=none; b=Rrxz9SjYgXgi29lRLEguTV8f+jddYEL9NKyDywjjWIqGjMswVEP5t4oD+zNninZ8Rl1GGDfSKhb9WCGZ7kBbL8jDBL7dhK0sZx/6YB6FfgTSUNWeEx7quVQSFP+PsYV1/gt744qnkT7hAcCQeiXS9WoVbD6/bmFxef1JiHP3Pxg= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1780570080; c=relaxed/simple; bh=cGUa2NrW4o13lTK5PV+RR67Y090uKN/CleGtutXHblY=; h=Subject:To:Cc:From:Date:Message-ID:MIME-Version:Content-Type; b=LOaGGiUi8BcjhI8YVuTeJG0dgtKIb2cIf67vdHIPvNkd2eKUFeZCh8TvCaQmTiVLfvc0fUapcyAF64kxGdJchYsQlelsbGVNKitTvruypqmWu5D7DVfWzX/9NYcij14SHOA956Cjb5TEY3z58jq+b0JiD1gnlIqtAoKmsvD18vs= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b=FhAVSa/c; arc=none smtp.client-ip=100.103.45.18 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b="FhAVSa/c" Received: by smtp.kernel.org (Postfix) with ESMTPSA id A3D191F00893; Thu, 4 Jun 2026 10:47:57 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linuxfoundation.org; s=korg; t=1780570079; bh=0K0su3/lkCIqJD9lQmZAS7cw0bdzZfqspPJYnLladN4=; h=Subject:To:Cc:From:Date; b=FhAVSa/c7icVNY98v1JXlH26DG23t16TxF1VJ0s91L/3+t7XDP2kwGMJbX0eg0cl/ 10E1yRLxPk2ZKHsSSW0nh1eGlcdnjB5QYTuSdMjLSJML48mUHhlOv4YV5Y4fj3P9mT kw2DULvj4G5NfXYPg/7MJMQH5TIe8dNE5mehZ7+g= Subject: FAILED: patch "[PATCH] usb: gadget: f_hid: fix device reference leak in hidg_alloc()" failed to apply to 5.15-stable tree To: lgs201920130244@gmail.com,gregkh@linuxfoundation.org,johan@kernel.org,stable@kernel.org Cc: From: Date: Thu, 04 Jun 2026 12:46:53 +0200 Message-ID: <2026060453-cape-pavestone-2366@gregkh> Precedence: bulk X-Mailing-List: stable@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset=ANSI_X3.4-1968 Content-Transfer-Encoding: 8bit The patch below does not apply to the 5.15-stable tree. If someone wants it applied there, or to any other stable or longterm tree, then please email the backport, including the original git commit id to . To reproduce the conflict and resubmit, you may use the following commands: git fetch https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/ linux-5.15.y git checkout FETCH_HEAD git cherry-pick -x 4f88d65def6f3c90121601b4f62a4c967f3063a6 # git commit -s git send-email --to '' --in-reply-to '2026060453-cape-pavestone-2366@gregkh' --subject-prefix 'PATCH 5.15.y' HEAD^.. Possible dependencies: thanks, greg k-h ------------------ original commit in Linus's tree ------------------ >From 4f88d65def6f3c90121601b4f62a4c967f3063a6 Mon Sep 17 00:00:00 2001 From: Guangshuo Li Date: Mon, 13 Apr 2026 22:21:19 +0800 Subject: [PATCH] usb: gadget: f_hid: fix device reference leak in hidg_alloc() hidg_alloc() initializes hidg->dev with device_initialize() before calling dev_set_name(). If dev_set_name() fails, the function currently jumps to err_unlock and returns without calling put_device(). This leaves the device reference unbalanced and prevents hidg_release() from being called. Calling put_device() here is also safe, since hidg_release() only frees resources owned by hidg. The issue was identified by a static analysis tool I developed and confirmed by manual review. Route the dev_set_name() failure path through err_put_device so the device reference is dropped properly. Fixes: 89ff3dfac604 ("usb: gadget: f_hid: fix f_hidg lifetime vs cdev") Cc: stable Reviewed-by: Johan Hovold Signed-off-by: Guangshuo Li Reviewed-by: Johan Hovold johan@kernel.org Link: https://patch.msgid.link/20260413142119.2977716-1-lgs201920130244@gmail.com Signed-off-by: Greg Kroah-Hartman diff --git a/drivers/usb/gadget/function/f_hid.c b/drivers/usb/gadget/function/f_hid.c index c5a12a6760ea..3c6b43d06a6d 100644 --- a/drivers/usb/gadget/function/f_hid.c +++ b/drivers/usb/gadget/function/f_hid.c @@ -1622,7 +1622,7 @@ static struct usb_function *hidg_alloc(struct usb_function_instance *fi) hidg->dev.devt = MKDEV(major, opts->minor); ret = dev_set_name(&hidg->dev, "hidg%d", opts->minor); if (ret) - goto err_unlock; + goto err_put_device; hidg->bInterfaceSubClass = opts->subclass; hidg->bInterfaceProtocol = opts->protocol; @@ -1659,7 +1659,6 @@ static struct usb_function *hidg_alloc(struct usb_function_instance *fi) err_put_device: put_device(&hidg->dev); -err_unlock: mutex_unlock(&opts->lock); return ERR_PTR(ret); }