The patch below does not apply to the 4.14-stable tree. If someone wants it applied there, or to any other stable or longterm tree, then please email the backport, including the original git commit id to stable@vger.kernel.org.
thanks,
greg k-h
------------------ original commit in Linus's tree ------------------
From 1b02d9e770cd7087f34c743f85ccf5ea8372b047 Mon Sep 17 00:00:00 2001
From: Bartosz Golaszewski bgolaszewski@baylibre.com Date: Tue, 8 Sep 2020 15:07:49 +0200 Subject: [PATCH] gpio: mockup: fix resource leak in error path
If the module init function fails after creating the debugs directory, it's never removed. Add proper cleanup calls to avoid this resource leak.
Fixes: 9202ba2397d1 ("gpio: mockup: implement event injecting over debugfs") Cc: stable@vger.kernel.org Signed-off-by: Bartosz Golaszewski bgolaszewski@baylibre.com Reviewed-by: Andy Shevchenko andriy.shevchenko@linux.intel.com
diff --git a/drivers/gpio/gpio-mockup.c b/drivers/gpio/gpio-mockup.c index bc345185db26..1652897fdf90 100644 --- a/drivers/gpio/gpio-mockup.c +++ b/drivers/gpio/gpio-mockup.c @@ -552,6 +552,7 @@ static int __init gpio_mockup_init(void) err = platform_driver_register(&gpio_mockup_driver); if (err) { gpio_mockup_err("error registering platform driver\n"); + debugfs_remove_recursive(gpio_mockup_dbg_dir); return err; }
@@ -582,6 +583,7 @@ static int __init gpio_mockup_init(void) gpio_mockup_err("error registering device"); platform_driver_unregister(&gpio_mockup_driver); gpio_mockup_unregister_pdevs(); + debugfs_remove_recursive(gpio_mockup_dbg_dir); return PTR_ERR(pdev); }