From: james.morse@arm•com (James Morse)
To: linux-arm-kernel@lists•infradead.org
Subject: [PATCH 4/4] ef/libstub: arm/arm64: randomize the base of the UEFI rt services region
Date: Fri, 07 Apr 2017 17:11:52 +0100 [thread overview]
Message-ID: <58E7BA48.70903@arm.com> (raw)
In-Reply-To: <CAKv+Gu9CpCWHT=3KboPTtuZVDundtGheKawS=iV_P756RFbaDg@mail.gmail.com>
Hi Ard,
On 07/04/17 16:51, Ard Biesheuvel wrote:
> That is quite interesting, to be honest, because that patch should
> effectively be a NOP on systems that do not implement
> EFI_RNG_PROTOCOL.
>
> Could you run this from the UEFI shell please?
>
> http://people.linaro.org/~ard.biesheuvel/RngTest.efi
As you predicted:
Shell> RngTest.efi
UEFI RNG Protocol Testing :
----------------------------
-- Locate UEFI RNG Protocol : [Fail - Status = Not Found]
Error reported: Not Found
> I would expect it to report that it has no EFI_RNG_PROTOCOL
> implementation. Could you also check whether the working kernel still
> works /after/ having executed that utility?
The broken kernel remains broken after running that test. reboot. The working
kernel continues to work after running that test.
(On Monday) I will try with just these efi changes on v4.11-rc. to try and
eliminate everything else in linux-next.
This is one of those firmware versions that prints lots of
> efi: [Firmware Bug]: IRQ flags corrupted (0x00000140=>0x00000100) by EFI
get_variable
Thanks,
James
next prev parent reply other threads:[~2017-04-07 16:11 UTC|newest]
Thread overview: 11+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-03-24 13:24 [PATCH 0/4] efi: libstub enhancements for cmdline parsing and kaslr Ard Biesheuvel
2017-03-24 13:24 ` [PATCH 1/4] efi/libstub: fix harmless command line parsing bug Ard Biesheuvel
2017-03-24 13:24 ` [PATCH 2/4] efi/libstub: unify command line param parsing Ard Biesheuvel
2017-03-24 13:24 ` [PATCH 3/4] efi/libstub: arm/arm64: disable debug prints on 'quiet' cmdline arg Ard Biesheuvel
2017-03-24 14:15 ` Mark Rutland
2017-03-24 13:24 ` [PATCH 4/4] ef/libstub: arm/arm64: randomize the base of the UEFI rt services region Ard Biesheuvel
2017-04-07 15:47 ` James Morse
2017-04-07 15:51 ` Ard Biesheuvel
2017-04-07 16:11 ` James Morse [this message]
2017-04-10 9:41 ` Mark Rutland
2017-04-10 9:44 ` Ard Biesheuvel
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