linux-kernel - Re: [PATCH 1/2] efi/esrt: fix unsupported version initialization failure

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Date:   Thu, 8 Mar 2018 18:00:50 +0000
From:   Ard Biesheuvel <ard.biesheuvel@...aro.org>
To:     Tyler Baicar <tbaicar@...eaurora.org>
Cc:     Dave Young <dyoung@...hat.com>, linux-efi@...r.kernel.org,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        Jeff Hugo <jhugo@...eaurora.org>,
        Sameer Goel <sgoel@...eaurora.org>,
        AKASHI Takahiro <takahiro.akashi@...aro.org>,
        Timur Tabi <timur@...eaurora.org>
Subject: Re: [PATCH 1/2] efi/esrt: fix unsupported version initialization failure

On 8 March 2018 at 16:11, Tyler Baicar <tbaicar@...eaurora.org> wrote:
> On 2/24/2018 2:20 AM, Dave Young wrote:
>>
>> On 02/23/18 at 12:42pm, Tyler Baicar wrote:
>>>
>>> If ESRT initialization fails due to an unsupported version, the
>>> early_memremap allocation is never unmapped. This will cause an
>>> early ioremap leak. So, make sure to unmap the memory allocation
>>> before returning from efi_esrt_init().
>>>
>>> Signed-off-by: Tyler Baicar <tbaicar@...eaurora.org>
>>> ---
>>>   drivers/firmware/efi/esrt.c | 2 +-
>>>   1 file changed, 1 insertion(+), 1 deletion(-)
>>>
>>> diff --git a/drivers/firmware/efi/esrt.c b/drivers/firmware/efi/esrt.c
>>> index c47e0c6..504f3c3 100644
>>> --- a/drivers/firmware/efi/esrt.c
>>> +++ b/drivers/firmware/efi/esrt.c
>>> @@ -285,7 +285,7 @@ void __init efi_esrt_init(void)
>>>         } else {
>>>                 pr_err("Unsupported ESRT version %lld.\n",
>>>                        tmpesrt.fw_resource_version);
>>> -               return;
>>> +               goto err_memunmap;
>>>         }
>>>         if (tmpesrt.fw_resource_count > 0 && max - size < entry_size) {
>>> --
>>
>> Reviewed-by: Dave Young <dyoung@...hat.com>
>
> Thank you Dave for your review here and input on the other patch.
>
> Ard,
>
> Can this patch be picked up? I understand patch 2 is not acceptable, but
> this one should
> be good to go I think.
>

Yeah you're right. I'll pick it up as a bugfix.