This is a note to let you know that I've just added the patch titled rapidio: devices: fix missing put_device in mport_cdev_open to the 5.15-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: rapidio-devices-fix-missing-put_device-in-mport_cdev.patch and it can be found in the queue-5.15 subdirectory. If you, or anyone else, feels it should not be added to the stable tree, please let <stable@xxxxxxxxxxxxxxx> know about it. commit 8841eae2afebb12268598377e811b9f59468257b Author: Cai Xinchen <caixinchen1@xxxxxxxxxx> Date: Sat Dec 3 08:57:21 2022 +0000 rapidio: devices: fix missing put_device in mport_cdev_open [ Upstream commit d5b6e6eba3af11cb2a2791fa36a2524990fcde1a ] When kfifo_alloc fails, the refcount of chdev->dev is left incremental. We should use put_device(&chdev->dev) to decrease the ref count of chdev->dev to avoid refcount leak. Link: https://lkml.kernel.org/r/20221203085721.13146-1-caixinchen1@xxxxxxxxxx Fixes: e8de370188d0 ("rapidio: add mport char device driver") Signed-off-by: Cai Xinchen <caixinchen1@xxxxxxxxxx> Cc: Alexandre Bounine <alex.bou9@xxxxxxxxx> Cc: Dan Carpenter <error27@xxxxxxxxx> Cc: Jakob Koschel <jakobkoschel@xxxxxxxxx> Cc: John Hubbard <jhubbard@xxxxxxxxxx> Cc: Matt Porter <mporter@xxxxxxxxxxxxxxxxxxx> Cc: Wang Weiyang <wangweiyang2@xxxxxxxxxx> Cc: Yang Yingliang <yangyingliang@xxxxxxxxxx> Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx> Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx> diff --git a/drivers/rapidio/devices/rio_mport_cdev.c b/drivers/rapidio/devices/rio_mport_cdev.c index b8c09eaa23b5..5ac2dc1e2abd 100644 --- a/drivers/rapidio/devices/rio_mport_cdev.c +++ b/drivers/rapidio/devices/rio_mport_cdev.c @@ -1911,6 +1911,7 @@ static int mport_cdev_open(struct inode *inode, struct file *filp) sizeof(struct rio_event) * MPORT_EVENT_DEPTH, GFP_KERNEL); if (ret < 0) { + put_device(&chdev->dev); dev_err(&chdev->dev, DRV_NAME ": kfifo_alloc failed\n"); ret = -ENOMEM; goto err_fifo;