From nobody Tue Jun 9 00:54:30 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 BCA18242D6B; Mon, 25 May 2026 02:55:06 +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=1779677710; cv=none; b=Ff5SNRh4bItIoU2KK6yK8FacsN18DF3zlfvNEiXT1XJEQsmxY3nKteJJOSzdsDe63P9N/LCCmRcBiIwAxgKlVxFk5M1jUaJjs3ESWZ+qNXLpvbcT4AFN7tPRN42OLDrbiSn4dPke/CAb+hHYWLGtwIfnKIf/uaXQl/5x81a3DqI= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1779677710; c=relaxed/simple; bh=2eqFuQ/MwI+xL9ig6/ztvqyUJ15awKTqF55lGaeA0v0=; h=From:To:Cc:Subject:Date:Message-Id:MIME-Version; b=Vt0TftQKsQ9KsW2e6nNZos8mCGp6OD8WkXt80AAaKOPLBzYd7xeFlIcv4lHdSWHygvIdevxRvbvBNcaN71UlmC+a5al3y2EJPZK08x6y/efRZhHQM2LLWrhzGdC+fRU6gEIfX270ozwjPdvYDL3UURwCCsN4K28wyGWqDRVtw+Q= 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 dfae2b116770.home.arpa (unknown [36.110.52.2]) by APP-03 (Coremail) with SMTP id rQCowACntMsDuhNqBVI_Eg--.824S2; Mon, 25 May 2026 10:54:59 +0800 (CST) From: Wentao Liang To: maarten.lankhorst@linux.intel.com, mripard@kernel.org, tzimmermann@suse.de, airlied@gmail.com, simona@ffwll.ch Cc: dri-devel@lists.freedesktop.org, linux-kernel@vger.kernel.org, Wentao Liang , stable@vger.kernel.org Subject: [PATCH] gpu/drm/drm_syncobj: fix fence and syncobj refcount leak in drm_syncobj_import_sync_file_fence() Date: Mon, 25 May 2026 02:54:55 +0000 Message-Id: <20260525025455.3887523-1-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: rQCowACntMsDuhNqBVI_Eg--.824S2 X-Coremail-Antispam: 1UD129KBjvJXoWrKF4UuF47Kr4kuw4Utw47Jwb_yoW8Jry8pF sxGryqkrykta1FvrWfCFWqvFyfGa12qFWFgr17Cw13A3Z5tr1DJw45G392ga4DA3s7Aryf tr92kF4YvFn8CrJanT9S1TB71UUUUU7qnTZGkaVYY2UrUUUUjbIjqfuFe4nvWSU5nxnvy2 9KBjDU0xBIdaVrnRJUUUkK14x267AKxVW8JVW5JwAFc2x0x2IEx4CE42xK8VAvwI8IcIk0 rVWrJVCq3wAFIxvE14AKwVWUJVWUGwA2ocxC64kIII0Yj41l84x0c7CEw4AK67xGY2AK02 1l84ACjcxK6xIIjxv20xvE14v26F1j6w1UM28EF7xvwVC0I7IYx2IY6xkF7I0E14v26r4U JVWxJr1l84ACjcxK6I8E87Iv67AKxVWxJr0_GcWl84ACjcxK6I8E87Iv6xkF7I0E14v26r xl6s0DM2AIxVAIcxkEcVAq07x20xvEncxIr21l5I8CrVACY4xI64kE6c02F40Ex7xfMcIj 6xIIjxv20xvE14v26r1j6r18McIj6I8E87Iv67AKxVW8JVWxJwAm72CE4IkC6x0Yz7v_Jr 0_Gr1lF7xvr2IYc2Ij64vIr41lF7I21c0EjII2zVCS5cI20VAGYxC7MxkF7I0En4kS14v2 6r1q6r43MxAIw28IcxkI7VAKI48JMxC20s026xCaFVCjc4AY6r1j6r4UMI8I3I0E5I8CrV AFwI0_Jr0_Jr4lx2IqxVCjr7xvwVAFwI0_JrI_JrWlx4CE17CEb7AF67AKxVWUtVW8ZwCI c40Y0x0EwIxGrwCI42IY6xIIjxv20xvE14v26r1j6r1xMIIF0xvE2Ix0cI8IcVCY1x0267 AKxVWUJVW8JwCI42IY6xAIw20EY4v20xvaj40_Jr0_JF4lIxAIcVC2z280aVAFwI0_Jr0_ Gr1lIxAIcVC2z280aVCY1x0267AKxVW8JVW8JrUvcSsGvfC2KfnxnUUI43ZEXa7VUb8hL5 UUUUU== X-CM-SenderInfo: pyxotu46lvutnvoduhdfq/1tbiDAYSA2oTok5z+AAAsF Content-Type: text/plain; charset="utf-8" In drm_syncobj_import_sync_file_fence(), when point is non-zero and dma_fence_chain_alloc() fails, the function returns -ENOMEM without releasing the fence reference (obtained via sync_file_get_fence) and the syncobj reference (obtained via drm_syncobj_find). Add dma_fence_put() and drm_syncobj_put() calls on the error path to properly release both references. Cc: stable@vger.kernel.org Fixes: c2d3a7300695 ("drm/syncobj: Extend EXPORT_SYNC_FILE for timeline syn= cobjs") Signed-off-by: Wentao Liang --- drivers/gpu/drm/drm_syncobj.c | 5 ++++- 1 file changed, 4 insertions(+), 1 deletion(-) diff --git a/drivers/gpu/drm/drm_syncobj.c b/drivers/gpu/drm/drm_syncobj.c index 0e986daa8ff9..34c87698e316 100644 --- a/drivers/gpu/drm/drm_syncobj.c +++ b/drivers/gpu/drm/drm_syncobj.c @@ -745,8 +745,11 @@ static int drm_syncobj_import_sync_file_fence(struct d= rm_file *file_private, if (point) { struct dma_fence_chain *chain =3D dma_fence_chain_alloc(); =20 - if (!chain) + if (!chain) { + dma_fence_put(fence); + drm_syncobj_put(syncobj); return -ENOMEM; + } =20 drm_syncobj_add_point(syncobj, chain, fence, point); } else { --=20 2.34.1