From nobody Fri Sep 25 02:09:25 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 C5D0A4CDDEB; Thu, 17 Sep 2026 16:14:31 +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=1789661674; cv=none; b=W9c3hmm8mDrs0kRquKtXnFIZ46eB2Sy0eZxpu1yhQ4hS5EHLnLLWzPjDA42HkrpOmRid/l+E+IJfMb3gwFhYBA96LTpXxxwDHlmDNy2AqSlTaCw10MptbO/mG61bt6py+b+YXai4p1yNJYhI/CCnjECtoaSdT/yfKayCLcusZJQ= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1789661674; c=relaxed/simple; bh=e32bC870PeFPcpa8fqr9r1QD/PlRzxG+ael3+PgOwNU=; h=From:To:Cc:Subject:Date:Message-Id:MIME-Version; b=SYf2ARnapvinQri3Fy7DTugOLVufXaxGgAFKKepvHOCkVExjtPat07Kh0lCW0l3YQ3FFDuASU7onEI+fFN8GhsXK4Zm0D4scHjZGtGsCbam1UY2cpCNKDgEggcxh7YVOdBN/byGtjxwltRBpqJ7PRRnRlEqk6pxIdIYxsI4RDSw= 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 dfae2b116770.home.arpa (unknown [36.110.52.2]) by APP-05 (Coremail) with SMTP id zQCowABnl0HlEaxq70KECA--.6559S2; Fri, 18 Sep 2026 00:14:29 +0800 (CST) From: Wentao Liang To: gregkh@linuxfoundation.org Cc: linux-kernel@vger.kernel.org, linux-usb@vger.kernel.org, mgr@kernel.org, Wentao Liang , stable@vger.kernel.org Subject: [PATCH] usb: gadget: uvc: Fix config_item reference leak in uvc_alloc() Date: Thu, 17 Sep 2026 16:14:29 +0000 Message-Id: <20260917161429.2161970-1-vulab@iscas.ac.cn> X-Mailer: git-send-email 2.34.1 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: zQCowABnl0HlEaxq70KECA--.6559S2 X-Coremail-Antispam: 1UD129KBjvdXoWrKFW7Ww17Aw4rtFW5Wr1kuFg_yoWDCwcEkr 1UWrZ3Gryjk34qyr40y39xuFW7KFs8Zr48WF1IgrZ8Ka4Fvw17urykurZ5AF17Zr1xCF98 AFWrJrZ3Wan7WjkaLaAFLSUrUUUUjb8apTn2vfkv8UJUUUU8Yxn0WfASr-VFAUDa7-sFnT 9fnUUIcSsGvfJTRUUUbskFc2x0x2IEx4CE42xK8VAvwI8IcIk0rVWrJVCq3wAFIxvE14AK wVWUJVWUGwA2ocxC64kIII0Yj41l84x0c7CEw4AK67xGY2AK021l84ACjcxK6xIIjxv20x vE14v26r4j6ryUM28EF7xvwVC0I7IYx2IY6xkF7I0E14v26F4j6r4UJwA2z4x0Y4vEx4A2 jsIE14v26r4j6F4UM28EF7xvwVC2z280aVCY1x0267AKxVW8JVW8Jr1le2I262IYc4CY6c 8Ij28IcVAaY2xG8wAqx4xG64xvF2IEw4CE5I8CrVC2j2WlYx0E2Ix0cI8IcVAFwI0_Jw0_ WrylYx0Ex4A2jsIE14v26r4j6F4UMcvjeVCFs4IE7xkEbVWUJVW8JwACjcxG0xvY0x0EwI xGrwACjI8F5VA0II8E6IAqYI8I648v4I1lc7CjxVAaw2AFwI0_JF0_Jw1l42xK82IYc2Ij 64vIr41l42xK82IY6x8ErcxFaVAv8VW8GFyrJr1UJwCFx2IqxVCFs4IE7xkEbVWUJVW8Jw C20s026c02F40E14v26r1j6r18MI8I3I0E7480Y4vE14v26r106r1rMI8E67AF67kF1VAF wI0_JF0_Jw1lIxkGc2Ij64vIr41lIxAIcVC0I7IYx2IY67AKxVWUCVW8JwCI42IY6xIIjx v20xvEc7CjxVAFwI0_Cr0_Gr1UMIIF0xvE42xK8VAvwI8IcIk0rVWUJVWUCwCI42IY6I8E 87Iv67AKxVWUJVW8JwCI42IY6I8E87Iv6xkF7I0E14v26r4j6r4UJbIYCTnIWIevJa73Uj IFyTuYvjfUnGQDUUUUU X-CM-SenderInfo: pyxotu46lvutnvoduhdfq/1tbiBwQNA2qr9thAygAAso Content-Type: text/plain; charset="utf-8" uvc_alloc() gets a reference on the streaming header item with config_group_find_item(). If the header is not linked to a streaming interface the function returns -EBUSY after freeing uvc, so uvc_free() never runs and the reference is leaked. Drop it before returning. Fixes: 3180d827c807 ("usb: gadget: uvc: don't put item still in use") Cc: stable@vger.kernel.org Signed-off-by: Wentao Liang --- drivers/usb/gadget/function/f_uvc.c | 1 + 1 file changed, 1 insertion(+) diff --git a/drivers/usb/gadget/function/f_uvc.c b/drivers/usb/gadget/funct= ion/f_uvc.c index 8d404d88391c..eb5837b17e6b 100644 --- a/drivers/usb/gadget/function/f_uvc.c +++ b/drivers/usb/gadget/function/f_uvc.c @@ -1126,6 +1126,7 @@ static struct usb_function *uvc_alloc(struct usb_func= tion_instance *fi) =20 uvc->header =3D to_uvcg_streaming_header(h); if (!uvc->header->linked) { + config_item_put(h); mutex_unlock(&opts->lock); kfree(uvc); return ERR_PTR(-EBUSY); --=20 2.34.1