linux-kernel - acpi_battery_add(): use-after-free

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Message-ID: <20070729150046.GM16817@stusta.de>
Date:	Sun, 29 Jul 2007 17:00:46 +0200
From:	Adrian Bunk <bunk@...sta.de>
To:	lenb@...nel.org
Cc:	linux-acpi@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: acpi_battery_add(): use-after-free

The Coverity checker spotted the following use-after-free in 
acpi_battery_add():

<--  snip  -->

...
static int acpi_battery_add(struct acpi_device *device)
{
...
        if (result) {
                acpi_battery_remove_fs(device);
                kfree(battery);
        }

        mutex_unlock(&battery->mutex);
...

<--  snip  -->

cu
Adrian

-- 

       "Is there not promise of rain?" Ling Tan asked suddenly out
        of the darkness. There had been need of rain for many days.
       "Only a promise," Lao Er said.
                                       Pearl S. Buck - Dragon Seed

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