From: Dinghao Liu Date: Mon, 24 Aug 2020 02:40:01 +0000 (+0800) Subject: watchdog: Fix memleak in watchdog_cdev_register X-Git-Tag: v5.8.17~180 X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=f12e9c2f97083f30818e929bf3986505fcdf61d0;p=thirdparty%2Fkernel%2Fstable.git watchdog: Fix memleak in watchdog_cdev_register [ Upstream commit 5afb6d203d0293512aa2c6ae098274a2a4f6ed02 ] When watchdog_kworker is NULL, we should free wd_data before the function returns to prevent memleak. Fixes: 664a39236e718 ("watchdog: Introduce hardware maximum heartbeat in watchdog core") Signed-off-by: Dinghao Liu Reviewed-by: Guenter Roeck Link: https://lore.kernel.org/r/20200824024001.25474-1-dinghao.liu@zju.edu.cn Signed-off-by: Guenter Roeck Signed-off-by: Wim Van Sebroeck Signed-off-by: Sasha Levin --- diff --git a/drivers/watchdog/watchdog_dev.c b/drivers/watchdog/watchdog_dev.c index b535f5fa279b9..d772dff789f3c 100644 --- a/drivers/watchdog/watchdog_dev.c +++ b/drivers/watchdog/watchdog_dev.c @@ -991,8 +991,10 @@ static int watchdog_cdev_register(struct watchdog_device *wdd) wd_data->wdd = wdd; wdd->wd_data = wd_data; - if (IS_ERR_OR_NULL(watchdog_kworker)) + if (IS_ERR_OR_NULL(watchdog_kworker)) { + kfree(wd_data); return -ENODEV; + } device_initialize(&wd_data->dev); wd_data->dev.devt = MKDEV(MAJOR(watchdog_devt), wdd->id);