linux-kernel - Re: [PATCH 1/1] usbip/userspace/libsrc/names.c: memory leak

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Message-ID: <52E6F12D.90701@cogentembedded.com>
Date:	Tue, 28 Jan 2014 02:52:13 +0300
From:	Sergei Shtylyov <sergei.shtylyov@...entembedded.com>
To:	xypron.glpk@....de, devel@...verdev.osuosl.org
CC:	gregkh@...uxfoundation.org, ly80toro@....cs.fau.de,
	ke42caxa@....cs.fau.de, linux-usb@...r.kernel.org,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH 1/1] usbip/userspace/libsrc/names.c: memory leak

Hello.

On 01/28/2014 01:29 AM, xypron.glpk@....de wrote:

> From: Heinrich Schuchardt <xypron.glpk@....de>

> p is freed if NULL.

    This is not an issue.

> p is leaked if second calloc fails.
>
> Signed-off-by: Heinrich Schuchardt <xypron.glpk@....de>
> ---
>   drivers/staging/usbip/userspace/libsrc/names.c |    2 +-
>   1 file changed, 1 insertion(+), 1 deletion(-)
>
> diff --git a/drivers/staging/usbip/userspace/libsrc/names.c b/drivers/staging/usbip/userspace/libsrc/names.c
> index 3c8d28b..b2904e8 100644
> --- a/drivers/staging/usbip/userspace/libsrc/names.c
> +++ b/drivers/staging/usbip/userspace/libsrc/names.c
> @@ -170,12 +170,12 @@ static void *my_malloc(size_t size)
>
>   	p = calloc(1, sizeof(struct pool));
>   	if (!p) {
> -		free(p);
>   		return NULL;
>   	}

    {} not needed anymore.

>
>   	p->mem = calloc(1, size);
>   	if (!p->mem)
> +		free(p);
>   		return NULL;

    How about {} around the *if* arm?

WBR, Sergei

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