[U-Boot] [PATCH] usb: gadget: f_dfu.c: fix memory leak

[Lukasz Majewski]

Hi Ralph,

> dfu_prepare_function() allocates N+1 descriptor header structures,
> the last one being the "DFU Functional Descriptor".
> 
> dfu_unbind() handles de-allocation, but failes to free the final
> one (eg. "DFU Functional Descriptor"), leading to memory leak.
> 
> Fixed by incrementing counter, as in dfu_prepare_function().
> 
> Signed-off-by: Ralph Siemsen <ralph.siemsen at linaro.org>

Thank you for the fix. I've just noticed it (as I was not on CC).

For the future patches please either use patman tool:
https://github.com/ARM-software/u-boot/tree/master/tools/patman

or use get_maitainer script, so the patch will be send directly to
responsible custodian (Maitainer).

> ---
> 
> Notes:
>     The array of pointers allocated in dfu_prepare_function() is
> larger than necessary. For some reason it is N+2 when N+1 would
> suffice. Not a memory leak, so did not address in this commit.
> 
>  drivers/usb/gadget/f_dfu.c | 1 +
>  1 file changed, 1 insertion(+)
> 
> diff --git a/drivers/usb/gadget/f_dfu.c b/drivers/usb/gadget/f_dfu.c
> index 30ece524a8..e27f146605 100644
> --- a/drivers/usb/gadget/f_dfu.c
> +++ b/drivers/usb/gadget/f_dfu.c
> @@ -748,6 +748,7 @@ static void dfu_unbind(struct usb_configuration
> *c, struct usb_function *f) 
>  	if (f_dfu->function) {
>  		i = alt_num;
> +		i++; /* free DFU Functional Descriptor */
>  		while (i) {
>  			free(f_dfu->function[--i]);
>  			f_dfu->function[i] = NULL;




Best regards,

Lukasz Majewski

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