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pcmcia: avoid prod_id memleak

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Reported-by: Wolfram Sang <w.sang@pengutronix.de>
Signed-off-by: Dominik Brodowski <linux@dominikbrodowski.net>
This commit is contained in:
Dominik Brodowski 2010-01-24 12:11:02 +01:00
parent c3bfc96ef7
commit 44961a03ad
1 changed files with 14 additions and 5 deletions
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19
drivers/pcmcia/ds.c
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@ -237,8 +237,11 @@ static void pcmcia_release_function(struct kref *ref)
static void pcmcia_release_dev(struct device *dev)
{
struct pcmcia_device *p_dev = to_pcmcia_dev(dev);
int i;
dev_dbg(dev, "releasing device\n");
pcmcia_put_socket(p_dev->socket);
for (i = 0; i < 4; i++)
kfree(p_dev->prod_id[i]);
kfree(p_dev->devname);
kref_put(&p_dev->function_config->ref, pcmcia_release_function);
kfree(p_dev);
@ -450,6 +453,7 @@ static int pcmcia_device_query(struct pcmcia_device *p_dev)
for (i = 0; i < min_t(unsigned int, 4, vers1->ns); i++) {
char *tmp;
unsigned int length;
char *new;
tmp = vers1->str + vers1->ofs[i];
@ -457,13 +461,15 @@ static int pcmcia_device_query(struct pcmcia_device *p_dev)
if ((length < 2) || (length > 255))
continue;
p_dev->prod_id[i] = kmalloc(sizeof(char) * length,
GFP_KERNEL);
if (!p_dev->prod_id[i])
new = kmalloc(sizeof(char) * length, GFP_KERNEL);
if (!new)
continue;
p_dev->prod_id[i] = strncpy(p_dev->prod_id[i],
tmp, length);
new = strncpy(new, tmp, length);
tmp = p_dev->prod_id[i];
p_dev->prod_id[i] = new;
kfree(tmp);
}
mutex_unlock(&p_dev->socket->ops_mutex);
}
@ -485,6 +491,7 @@ static DEFINE_MUTEX(device_add_lock);
struct pcmcia_device *pcmcia_device_add(struct pcmcia_socket *s, unsigned int function)
{
struct pcmcia_device *p_dev, *tmp_dev;
int i;
s = pcmcia_get_socket(s);
if (!s)
@ -575,6 +582,8 @@ struct pcmcia_device *pcmcia_device_add(struct pcmcia_socket *s, unsigned int fu
s->device_count--;
mutex_unlock(&s->ops_mutex);
for (i = 0; i < 4; i++)
kfree(p_dev->prod_id[i]);
kfree(p_dev->devname);
kfree(p_dev);
err_put: