* [PATCH] input: da9052: fix mem leak in da9052_onkey_probe()
@ 2012-04-11 20:56 Jesper Juhl
2012-04-11 21:22 ` Dmitry Torokhov
0 siblings, 1 reply; 2+ messages in thread
From: Jesper Juhl @ 2012-04-11 20:56 UTC (permalink / raw)
To: linux-kernel
Cc: David Dajun Chen, linux-input, Ashish Jangam, Dmitry Torokhov
If, in drivers/input/misc/da9052_onkey.c::da9052_onkey_probe(), the
call to either kzalloc() or input_allocate_device() fails then we will
return -ENOMEM from the function without freeing the other allocation
that may have succeeded, thus we leak either the memory allocated for
'onkey' or the memory allocated for 'input_dev' if one succeeds and
the other fails.
Fix that by jumping to the 'err_free_mem' label at the end of the
function that properly cleans up rather than returning directly.
Signed-off-by: Jesper Juhl <jj@chaosbits.net>
---
drivers/input/misc/da9052_onkey.c | 3 ++-
1 file changed, 2 insertions(+), 1 deletion(-)
diff --git a/drivers/input/misc/da9052_onkey.c b/drivers/input/misc/da9052_onkey.c
index 34aebb8..3c843cd 100644
--- a/drivers/input/misc/da9052_onkey.c
+++ b/drivers/input/misc/da9052_onkey.c
@@ -95,7 +95,8 @@ static int __devinit da9052_onkey_probe(struct platform_device *pdev)
input_dev = input_allocate_device();
if (!onkey || !input_dev) {
dev_err(&pdev->dev, "Failed to allocate memory\n");
- return -ENOMEM;
+ error = -ENOMEM;
+ goto err_free_mem;
}
onkey->input = input_dev;
--
1.7.10
--
Jesper Juhl <jj@chaosbits.net> http://www.chaosbits.net/
Don't top-post http://www.catb.org/jargon/html/T/top-post.html
Plain text mails only, please.
^ permalink raw reply related [flat|nested] 2+ messages in thread
* Re: [PATCH] input: da9052: fix mem leak in da9052_onkey_probe()
2012-04-11 20:56 [PATCH] input: da9052: fix mem leak in da9052_onkey_probe() Jesper Juhl
@ 2012-04-11 21:22 ` Dmitry Torokhov
0 siblings, 0 replies; 2+ messages in thread
From: Dmitry Torokhov @ 2012-04-11 21:22 UTC (permalink / raw)
To: Jesper Juhl; +Cc: linux-kernel, David Dajun Chen, linux-input, Ashish Jangam
On Wed, Apr 11, 2012 at 10:56:10PM +0200, Jesper Juhl wrote:
> If, in drivers/input/misc/da9052_onkey.c::da9052_onkey_probe(), the
> call to either kzalloc() or input_allocate_device() fails then we will
> return -ENOMEM from the function without freeing the other allocation
> that may have succeeded, thus we leak either the memory allocated for
> 'onkey' or the memory allocated for 'input_dev' if one succeeds and
> the other fails.
> Fix that by jumping to the 'err_free_mem' label at the end of the
> function that properly cleans up rather than returning directly.
>
> Signed-off-by: Jesper Juhl <jj@chaosbits.net>
I must have messed up error hanlding path when collapsing the 2 memory
allocations; applied, thank Jesper.
> ---
> drivers/input/misc/da9052_onkey.c | 3 ++-
> 1 file changed, 2 insertions(+), 1 deletion(-)
>
> diff --git a/drivers/input/misc/da9052_onkey.c b/drivers/input/misc/da9052_onkey.c
> index 34aebb8..3c843cd 100644
> --- a/drivers/input/misc/da9052_onkey.c
> +++ b/drivers/input/misc/da9052_onkey.c
> @@ -95,7 +95,8 @@ static int __devinit da9052_onkey_probe(struct platform_device *pdev)
> input_dev = input_allocate_device();
> if (!onkey || !input_dev) {
> dev_err(&pdev->dev, "Failed to allocate memory\n");
> - return -ENOMEM;
> + error = -ENOMEM;
> + goto err_free_mem;
> }
>
> onkey->input = input_dev;
> --
> 1.7.10
>
>
> --
> Jesper Juhl <jj@chaosbits.net> http://www.chaosbits.net/
> Don't top-post http://www.catb.org/jargon/html/T/top-post.html
> Plain text mails only, please.
>
--
Dmitry
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2012-04-11 20:56 [PATCH] input: da9052: fix mem leak in da9052_onkey_probe() Jesper Juhl
2012-04-11 21:22 ` Dmitry Torokhov
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