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hwmon (coretemp) Fix a memory leak bug

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In coretemp_init(), 'zone_devices' is allocated through kcalloc().
However, it is not deallocated in the following execution if
platform_driver_register() fails, leading to a memory leak. To fix this
issue, introduce the 'outzone' label to free 'zone_devices' before
returning the error.

Signed-off-by: Wenwen Wang <wenwen@cs.uga.edu>
Link: https://lore.kernel.org/r/1566248402-6538-1-git-send-email-wenwen@cs.uga.edu
Signed-off-by: Guenter Roeck <linux@roeck-us.net>
This commit is contained in:
Wenwen Wang 2019-08-19 16:00:02 -05:00 • committed by Guenter Roeck
parent 7d82fcc9d9
commit e027a2dea5
1 changed files with 2 additions and 1 deletions
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3
drivers/hwmon/coretemp.c
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@ -736,7 +736,7 @@ static int __init coretemp_init(void)
err = platform_driver_register(&coretemp_driver);
if (err)
return err;
goto outzone;
err = cpuhp_setup_state(CPUHP_AP_ONLINE_DYN, "hwmon/coretemp:online",
coretemp_cpu_online, coretemp_cpu_offline);
@ -747,6 +747,7 @@ static int __init coretemp_init(void)
outdrv:
platform_driver_unregister(&coretemp_driver);
outzone:
kfree(zone_devices);
return err;
}