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

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Message-ID: <f24bcd25-9d3d-12d6-a42c-ebe0c623dba6@codeaurora.org>
Date:   Thu, 8 Mar 2018 11:11:18 -0500
From:   Tyler Baicar <tbaicar@...eaurora.org>
To:     Dave Young <dyoung@...hat.com>
Cc:     ard.biesheuvel@...aro.org, linux-efi@...r.kernel.org,
        linux-kernel@...r.kernel.org, jhugo@...eaurora.org,
        sgoel@...eaurora.org, takahiro.akashi@...aro.org,
        timur@...eaurora.org
Subject: Re: [PATCH 1/2] efi/esrt: fix unsupported version initialization
 failure

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.

Thanks,
Tyler

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