From 6cc7b38c0ca3187abd07af849ec179b42337bcf6 Mon Sep 17 00:00:00 2001 From: Daniel Lezcano Date: Fri, 19 Mar 2021 21:25:22 +0100 Subject: [PATCH] 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 --- drivers/thermal/cpuidle_cooling.c | 8 +++++--- 1 file changed, 5 insertions(+), 3 deletions(-) diff --git a/drivers/thermal/cpuidle_cooling.c b/drivers/thermal/cpuidle_cooling.c index f32976163badf9..4f41102e8b16cd 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: