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| author | Julia Lawall <julia@diku.dk> | 2009-07-31 08:32:03 +0200 |
|---|---|---|
| committer | Takashi Iwai <tiwai@suse.de> | 2009-07-31 10:14:58 +0200 |
| commit | f065fabc864f4c98857bf67caa2365e9f8545751 (patch) | |
| tree | 5b5620ab40935a9e4dfc16a68f9b6e6e64c6d087 /sound/aoa | |
| parent | 34fdeb2d07102e07ecafe79dec170bd6733f2e56 (diff) | |
| download | lwn-f065fabc864f4c98857bf67caa2365e9f8545751.tar.gz lwn-f065fabc864f4c98857bf67caa2365e9f8545751.zip | |
ALSA: sound/aoa: Add kmalloc NULL tests
Check that the result of kzalloc is not NULL before a dereference.
The semantic match that finds this problem is as follows:
(http://www.emn.fr/x-info/coccinelle/)
// <smpl>
@@
expression *x;
identifier f;
constant char *C;
@@
x = \(kmalloc\|kcalloc\|kzalloc\)(...);
... when != x == NULL
when != x != NULL
when != (x || ...)
(
kfree(x)
|
f(...,C,...,x,...)
|
*f(...,x,...)
|
*x->f
)
// </smpl>
Signed-off-by: Julia Lawall <julia@diku.dk>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Diffstat (limited to 'sound/aoa')
| -rw-r--r-- | sound/aoa/core/gpio-pmf.c | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/sound/aoa/core/gpio-pmf.c b/sound/aoa/core/gpio-pmf.c index 5ca2220eac7d..1dd0c28d1fb7 100644 --- a/sound/aoa/core/gpio-pmf.c +++ b/sound/aoa/core/gpio-pmf.c @@ -182,6 +182,10 @@ static int pmf_set_notify(struct gpio_runtime *rt, if (!old && notify) { irq_client = kzalloc(sizeof(struct pmf_irq_client), GFP_KERNEL); + if (!irq_client) { + err = -ENOMEM; + goto out_unlock; + } irq_client->data = notif; irq_client->handler = pmf_handle_notify_irq; irq_client->owner = THIS_MODULE; |