From: Daniel Lezcano Date: Fri, 19 Mar 2021 20:25:22 +0000 (+0100) Subject: thermal/drivers/cpuidle_cooling: Fix use after error X-Git-Tag: v5.13-rc1~45^2~36 X-Git-Url: http://git.ipfire.org/?a=commitdiff_plain;h=6cc7b38c0ca3187abd07af849ec179b42337bcf6;p=thirdparty%2Flinux.git thermal/drivers/cpuidle_cooling: Fix use after error When the function successfully finishes it logs an information about the registration of the cooling device and use its name to build the message. Unfortunately it was freed right before: drivers/thermal/cpuidle_cooling.c:218 __cpuidle_cooling_register() warn: 'name' was already freed. Fix this by freeing after the message happened. Fixes: 6fd1b186d900 ("thermal/drivers/cpuidle_cooling: Use device name instead of auto-numbering") Reported-by: Dan Carpenter Signed-off-by: Daniel Lezcano Acked-by: Viresh Kumar Link: https://lore.kernel.org/r/20210319202522.891061-1-daniel.lezcano@linaro.org --- diff --git a/drivers/thermal/cpuidle_cooling.c b/drivers/thermal/cpuidle_cooling.c index f32976163badf..4f41102e8b16c 100644 --- a/drivers/thermal/cpuidle_cooling.c +++ b/drivers/thermal/cpuidle_cooling.c @@ -208,18 +208,20 @@ static int __cpuidle_cooling_register(struct device_node *np, cdev = thermal_of_cooling_device_register(np, name, idle_cdev, &cpuidle_cooling_ops); - kfree(name); - if (IS_ERR(cdev)) { ret = PTR_ERR(cdev); - goto out_unregister; + goto out_kfree_name; } pr_debug("%s: Idle injection set with idle duration=%u, latency=%u\n", name, idle_duration_us, latency_us); + kfree(name); + return 0; +out_kfree_name: + kfree(name); out_unregister: idle_inject_unregister(ii_dev); out_kfree: