[PATCH v2] USB: Fix NULLPTR dereference when serial# is unset

[Mattijs Korpershoek]

Hi Michael,

Thank you for the patch.

On mar., janv. 28, 2025 at 02:49, Marek Vasut <marex at denx.de> wrote:

> On 1/28/25 1:30 AM, Michael Ferolito wrote:
>> The current behaviour of this function will dereference a null pointer
>> if the serial# environment variable is unset. This was discovered on a
>> board where U-Boot did not have access to the first 256MB of ram,
>> resulting in a board crash.
>> In the event that U-Boot has full access to memory, it will still read
>> from address 0, which is probably not optimal.
>> This simple check is enough to fix it
>> 
>> Signed-off-by: Michael Ferolito <michaelsunn101 at gmail.com>
>> Cc: Marek Vasut <marex at denx.de>
>> Cc: Heiko Schocher <hs at denx.de>
>> Cc: Kyungmin Park <kyungmin.park at samsung.com>
> The subject tag is "usb: gadget: g_dnl:" instead of "USB:" , with that 
> fixed:
>
> Reviewed-by: Marek Vasut <marex at denx.de>

Agreed with Marek on this. Please add:

Reviewed-by: Mattijs Korpershoek <mkorpershoek at baylibre.com>

As well.

Marek, since this is gadget, can this go through my tree?
In that case, Michael, I can fix up the subject when applying (to avoid
you sending a v2)

Let me know if that works.

Thanks,
Mattijs


>
> Thanks