diff options
| author | Dan Carpenter <error27@gmail.com> | 2010-04-27 14:12:03 -0700 |
|---|---|---|
| committer | Grant Likely <grant.likely@secretlab.ca> | 2010-04-28 00:50:01 -0600 |
| commit | 3913fd5ed42c990c20036ef5c90e7987a9dd1ad1 (patch) | |
| tree | a3f4236246c3ffd65d71571c1f41615c3f4e24fc | |
| parent | 01bf0b64579ead8a82e7cfc32ae44bc667e7ad0f (diff) | |
gpio: potential null dereference
Smatch found a potential null dereference in gpio_setup_irq(). The
"pdesc" variable is allocated with idr_find() that can return NULL. If
gpio_setup_irq() is called with 0 as gpio_flags and "pdesc" is null, it
would OOPs here.
Signed-off-by: Dan Carpenter <error27@gmail.com>
Cc: David Brownell <david-b@pacbell.net>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
| -rw-r--r-- | drivers/gpio/gpiolib.c | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/drivers/gpio/gpiolib.c b/drivers/gpio/gpiolib.c index 76be229c814..eb0c3fe44b2 100644 --- a/drivers/gpio/gpiolib.c +++ b/drivers/gpio/gpiolib.c @@ -416,7 +416,8 @@ static int gpio_setup_irq(struct gpio_desc *desc, struct device *dev, return 0; free_sd: - sysfs_put(pdesc->value_sd); + if (pdesc) + sysfs_put(pdesc->value_sd); free_id: idr_remove(&pdesc_idr, id); desc->flags &= GPIO_FLAGS_MASK; |