This is a note to let you know that I've just added the patch titled drm/nouveau/debugfs: fix file release memory leak to the 4.9-stable tree which can be found at: http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary The filename of the patch is: drm-nouveau-debugfs-fix-file-release-memory-leak.patch and it can be found in the queue-4.9 subdirectory. If you, or anyone else, feels it should not be added to the stable tree, please let <stable@xxxxxxxxxxxxxxx> know about it. commit 63062c383b48d578411730129ef212dd0b9d0254 Author: Yang Yingliang <yangyingliang@xxxxxxxxxx> Date: Sat Sep 11 15:50:23 2021 +0800 drm/nouveau/debugfs: fix file release memory leak [ Upstream commit f5a8703a9c418c6fc54eb772712dfe7641e3991c ] When using single_open() for opening, single_release() should be called, otherwise the 'op' allocated in single_open() will be leaked. Fixes: 6e9fc177399f ("drm/nouveau/debugfs: add copy of sysfs pstate interface ported to debugfs") Reported-by: Hulk Robot <hulkci@xxxxxxxxxx> Signed-off-by: Yang Yingliang <yangyingliang@xxxxxxxxxx> Reviewed-by: Karol Herbst <kherbst@xxxxxxxxxx> Signed-off-by: Karol Herbst <kherbst@xxxxxxxxxx> Link: https://patchwork.freedesktop.org/patch/msgid/20210911075023.3969054-2-yangyingliang@xxxxxxxxxx Signed-off-by: Maarten Lankhorst <maarten.lankhorst@xxxxxxxxxxxxxxx> Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx> diff --git a/drivers/gpu/drm/nouveau/nouveau_debugfs.c b/drivers/gpu/drm/nouveau/nouveau_debugfs.c index 411c12cdb249..bb516eb12421 100644 --- a/drivers/gpu/drm/nouveau/nouveau_debugfs.c +++ b/drivers/gpu/drm/nouveau/nouveau_debugfs.c @@ -178,6 +178,7 @@ static const struct file_operations nouveau_pstate_fops = { .open = nouveau_debugfs_pstate_open, .read = seq_read, .write = nouveau_debugfs_pstate_set, + .release = single_release, }; static struct drm_info_list nouveau_debugfs_list[] = {