linux-kernel - Re: [PATCH] ACPI: Fix memory leak in acpi_ev_asynch_execute_gpe

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Date:	Sun, 16 Jan 2011 20:48:29 +0100
From:	"Rafael J. Wysocki" <rjw@...k.pl>
To:	Jesper Juhl <jj@...osbits.net>, Len Brown <lenb@...nel.org>
Cc:	linux-acpi@...r.kernel.org, linux-kernel@...r.kernel.org,
	Lin Ming <ming.m.lin@...el.com>
Subject: Re: [PATCH] ACPI: Fix memory leak in acpi_ev_asynch_execute_gpe_method().

On Sunday, January 16, 2011, Jesper Juhl wrote:
> We will leak the memory allocated to 'local_gpe_event_info' if 
> 'acpi_ut_acquire_mutex()' fails or if 'acpi_ev_valid_gpe_event()' fails in 
> drivers/acpi/acpica/evgpe.c::acpi_ev_asynch_execute_gpe_method().
> 
> Signed-off-by: Jesper Juhl <jj@...osbits.net>

Good catch!  How did you find it?

Reviewed-by: Rafael Wysocki <rjw@...k.pl>

Len, please apply and push to Linus ASAP.

Thanks,
Rafael


> ---
>  evgpe.c |    2 ++
>  1 file changed, 2 insertions(+)
> 
> diff --git a/drivers/acpi/acpica/evgpe.c b/drivers/acpi/acpica/evgpe.c
> index 7c339d3..b6de1fb 100644
> --- a/drivers/acpi/acpica/evgpe.c
> +++ b/drivers/acpi/acpica/evgpe.c
> @@ -471,6 +471,7 @@ static void ACPI_SYSTEM_XFACE acpi_ev_asynch_execute_gpe_method(void *context)
>  
>  	status = acpi_ut_acquire_mutex(ACPI_MTX_EVENTS);
>  	if (ACPI_FAILURE(status)) {
> +		ACPI_FREE(local_gpe_event_info);
>  		return_VOID;
>  	}
>  
> @@ -478,6 +479,7 @@ static void ACPI_SYSTEM_XFACE acpi_ev_asynch_execute_gpe_method(void *context)
>  
>  	if (!acpi_ev_valid_gpe_event(gpe_event_info)) {
>  		status = acpi_ut_release_mutex(ACPI_MTX_EVENTS);
> +		ACPI_FREE(local_gpe_event_info);
>  		return_VOID;
>  	}
>  
> 
> 

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