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Date: Mon, 24 Aug 2020 10:40:01 +0800 From: Dinghao Liu <dinghao.liu@....edu.cn> To: dinghao.liu@....edu.cn, kjlu@....edu Cc: Wim Van Sebroeck <wim@...ux-watchdog.org>, Guenter Roeck <linux@...ck-us.net>, linux-watchdog@...r.kernel.org, linux-kernel@...r.kernel.org Subject: [PATCH] watchdog: Fix memleak in watchdog_cdev_register 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 <dinghao.liu@....edu.cn> --- drivers/watchdog/watchdog_dev.c | 4 +++- 1 file changed, 3 insertions(+), 1 deletion(-) diff --git a/drivers/watchdog/watchdog_dev.c b/drivers/watchdog/watchdog_dev.c index 6798addabd5a..785270ee337c 100644 --- a/drivers/watchdog/watchdog_dev.c +++ b/drivers/watchdog/watchdog_dev.c @@ -994,8 +994,10 @@ 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); -- 2.17.1
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