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SubjectRe: [2.4] Memleak in drivers/usb/hub.c::usb_reset_device
Oleg Drokin wrote:
> Hello!
>
> There seems to be a memleak in drivers/usb/hub.c::usb_reset_device()
> on error exit path. See the patch.
> Found with help of smatch + enhanced unfree script.

Hmm ... and 2.5 allocates it on the stack, which is actually
illegal (DMA-to-stack is nonportable). This looks like a case
where it'd be good to make 2.5 look more like 2.4 (+ this patch).

- Dave


> Bye,
> Oleg
> ===== drivers/usb/hub.c 1.19 vs edited =====
> --- 1.19/drivers/usb/hub.c Sat Sep 21 00:12:53 2002
> +++ edited/drivers/usb/hub.c Wed Mar 12 22:38:43 2003
> @@ -1057,8 +1057,10 @@
> }
> ret = usb_get_descriptor(dev, USB_DT_DEVICE, 0, descriptor,
> sizeof(*descriptor));
> - if (ret < 0)
> + if (ret < 0) {
> + kfree(descriptor);
> return ret;
> + }
>
> le16_to_cpus(&descriptor->bcdUSB);
> le16_to_cpus(&descriptor->idVendor);
>



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