From d932cd49182f97966d196fb5301bfca90f58a360 Mon Sep 17 00:00:00 2001 From: Linus Walleij Date: Mon, 4 Jul 2016 13:13:04 +0200 Subject: [PATCH] gpio: free handles in fringe cases If we fail when copying the ioctl() struct to userspace we still need to clean up the cruft otherwise left behind or it will stay around until the issuing process terminates the file handle. Reported-by: Alexander Stein Acked-by: Alexander Stein Signed-off-by: Linus Walleij --- drivers/gpio/gpiolib.c | 12 ++++++++---- 1 file changed, 8 insertions(+), 4 deletions(-) diff --git a/drivers/gpio/gpiolib.c b/drivers/gpio/gpiolib.c index b195ec406ff4..69efe278f74d 100644 --- a/drivers/gpio/gpiolib.c +++ b/drivers/gpio/gpiolib.c @@ -488,8 +488,10 @@ static int linehandle_create(struct gpio_device *gdev, void __user *ip) } handlereq.fd = fd; - if (copy_to_user(ip, &handlereq, sizeof(handlereq))) - return -EFAULT; + if (copy_to_user(ip, &handlereq, sizeof(handlereq))) { + ret = -EFAULT; + goto out_free_descs; + } dev_dbg(&gdev->dev, "registered chardev handle for %d lines\n", lh->numdescs); @@ -784,8 +786,10 @@ static int lineevent_create(struct gpio_device *gdev, void __user *ip) } eventreq.fd = fd; - if (copy_to_user(ip, &eventreq, sizeof(eventreq))) - return -EFAULT; + if (copy_to_user(ip, &eventreq, sizeof(eventreq))) { + ret = -EFAULT; + goto out_free_irq; + } return 0; -- 2.39.2