Messages in this thread Patch in this message | | | From | Greg Kroah-Hartman <> | Subject | [PATCH 5.10 053/141] gpio: mockup: fix NULL pointer dereference when removing debugfs | Date | Mon, 26 Sep 2022 12:11:19 +0200 |
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From: Bartosz Golaszewski <brgl@bgdev.pl>
commit b7df41a6f79dfb18ba2203f8c5f0e9c0b9b57f68 upstream.
We now remove the device's debugfs entries when unbinding the driver. This now causes a NULL-pointer dereference on module exit because the platform devices are unregistered *after* the global debugfs directory has been recursively removed. Fix it by unregistering the devices first.
Fixes: 303e6da99429 ("gpio: mockup: remove gpio debugfs when remove device") Cc: Wei Yongjun <weiyongjun1@huawei.com> Cc: stable@vger.kernel.org Signed-off-by: Bartosz Golaszewski <brgl@bgdev.pl> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> --- drivers/gpio/gpio-mockup.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)
--- a/drivers/gpio/gpio-mockup.c +++ b/drivers/gpio/gpio-mockup.c @@ -604,9 +604,9 @@ static int __init gpio_mockup_init(void) static void __exit gpio_mockup_exit(void) { + gpio_mockup_unregister_pdevs(); debugfs_remove_recursive(gpio_mockup_dbg_dir); platform_driver_unregister(&gpio_mockup_driver); - gpio_mockup_unregister_pdevs(); } module_init(gpio_mockup_init);
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