Received-SPF: pass (google.com: best guess record for domain of linux-kernel-owner@vger.kernel.org designates 209.132.180.67 as permitted sender) client-ip=209.132.180.67;
To:     LKML <linux-kernel@vger.kernel.org>
From:   Andreas Hartmann <andihartmann@01019freenet.de>
Subject: Spectre mitigation doesn't seem to work at all?!
Message-ID: <141672d1-8dcb-9a84-7f8f-60c7a2c58b07@01019freenet.de>
Date:   Fri, 1 Jun 2018 14:19:38 +0200
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Sender: linux-kernel-owner@vger.kernel.org
Precedence: bulk

Hello!

I tested the spectre mitigation of different machines and kernels with
https://github.com/crozone/SpectrePoC

You can see the results below.


My question: Did I miss something?
My expectation was, that on base of the output of
/sys/devices/system/cpu/vulnerabilities/spectre_v* as shown below the problem should be gone away.
But the results seem to tell me something other ... .


Thanks
Andreas


----------------------------------------------------------------------------------------------------------------------
CPU:    AMD Ryzen 7 1700X Eight-Core Processor
Bios:   BIOS 4011 04/19/2018 - ibpb is listed in /proc/cpuinfo
Kernel: 4.14.44-1.1-default
cat /sys/devices/system/cpu/vulnerabilities/spectre_v2
Mitigation: Full AMD retpoline, IBPB
cat /sys/devices/system/cpu/vulnerabilities/spectre_v1
Mitigation: __user pointer sanitization

  ./spectre.out
Using a cache hit threshold of 80.
Build: RDTSCP_SUPPORTED MFENCE_SUPPORTED CLFLUSH_SUPPORTED INTEL_MITIGATION_DISABLED LINUX_KERNEL_MITIGATION_DISABLED
Reading 40 bytes:
Reading at malicious_x = 0xffffffffffdfec18... Success: 0x54=’T’ score=2
Reading at malicious_x = 0xffffffffffdfec19... Success: 0x68=’h’ score=2
Reading at malicious_x = 0xffffffffffdfec1a... Success: 0x65=’e’ score=2
Reading at malicious_x = 0xffffffffffdfec1b... Success: 0x20=’ ’ score=2
Reading at malicious_x = 0xffffffffffdfec1c... Success: 0x4D=’M’ score=2
Reading at malicious_x = 0xffffffffffdfec1d... Success: 0x61=’a’ score=2
Reading at malicious_x = 0xffffffffffdfec1e... Success: 0x67=’g’ score=2
Reading at malicious_x = 0xffffffffffdfec1f... Success: 0x69=’i’ score=2
Reading at malicious_x = 0xffffffffffdfec20... Success: 0x63=’c’ score=2
Reading at malicious_x = 0xffffffffffdfec21... Success: 0x20=’ ’ score=2
Reading at malicious_x = 0xffffffffffdfec22... Success: 0x57=’W’ score=2
Reading at malicious_x = 0xffffffffffdfec23... Success: 0x6F=’o’ score=2
Reading at malicious_x = 0xffffffffffdfec24... Success: 0x72=’r’ score=2
Reading at malicious_x = 0xffffffffffdfec25... Success: 0x64=’d’ score=2
Reading at malicious_x = 0xffffffffffdfec26... Success: 0x73=’s’ score=2
Reading at malicious_x = 0xffffffffffdfec27... Success: 0x20=’ ’ score=2
Reading at malicious_x = 0xffffffffffdfec28... Success: 0x61=’a’ score=2
Reading at malicious_x = 0xffffffffffdfec29... Success: 0x72=’r’ score=2
Reading at malicious_x = 0xffffffffffdfec2a... Success: 0x65=’e’ score=2
Reading at malicious_x = 0xffffffffffdfec2b... Success: 0x20=’ ’ score=2
Reading at malicious_x = 0xffffffffffdfec2c... Success: 0x53=’S’ score=2
Reading at malicious_x = 0xffffffffffdfec2d... Success: 0x71=’q’ score=2
Reading at malicious_x = 0xffffffffffdfec2e... Success: 0x75=’u’ score=2
Reading at malicious_x = 0xffffffffffdfec2f... Success: 0x65=’e’ score=2
Reading at malicious_x = 0xffffffffffdfec30... Success: 0x61=’a’ score=2
Reading at malicious_x = 0xffffffffffdfec31... Success: 0x6D=’m’ score=2
Reading at malicious_x = 0xffffffffffdfec32... Success: 0x69=’i’ score=2
Reading at malicious_x = 0xffffffffffdfec33... Success: 0x73=’s’ score=2
Reading at malicious_x = 0xffffffffffdfec34... Success: 0x68=’h’ score=2
Reading at malicious_x = 0xffffffffffdfec35... Success: 0x20=’ ’ score=2
Reading at malicious_x = 0xffffffffffdfec36... Success: 0x4F=’O’ score=2
Reading at malicious_x = 0xffffffffffdfec37... Success: 0x73=’s’ score=2
Reading at malicious_x = 0xffffffffffdfec38... Success: 0x73=’s’ score=2
Reading at malicious_x = 0xffffffffffdfec39... Success: 0x69=’i’ score=2
Reading at malicious_x = 0xffffffffffdfec3a... Success: 0x66=’f’ score=2
Reading at malicious_x = 0xffffffffffdfec3b... Success: 0x72=’r’ score=2
Reading at malicious_x = 0xffffffffffdfec3c... Success: 0x61=’a’ score=2
Reading at malicious_x = 0xffffffffffdfec3d... Success: 0x67=’g’ score=2
Reading at malicious_x = 0xffffffffffdfec3e... Success: 0x65=’e’ score=2
Reading at malicious_x = 0xffffffffffdfec3f... Success: 0x2E=’.’ score=2


----------------------------------------------------------------------------------------------------------------------
CPU:    AMD G-T40E Processor
Kernel: 4.14.44-1.el6.x86_64
cat /sys/devices/system/cpu/vulnerabilities/spectre_v1
Mitigation: __user pointer sanitization
cat /sys/devices/system/cpu/vulnerabilities/spectre_v2
Mitigation: Full AMD retpoline

./spectre.out 130
Using a cache hit threshold of 130.
Build: RDTSCP_SUPPORTED MFENCE_SUPPORTED CLFLUSH_SUPPORTED INTEL_MITIGATION_DISABLED LINUX_KERNEL_MITIGATION_DISABLED
Reading 40 bytes:
Reading at malicious_x = 0xffffffffffdfebf0... Unclear: 0x54=’T’ score=999 (second best: 0x00=’?’ score=992)
Reading at malicious_x = 0xffffffffffdfebf1... Unclear: 0x68=’h’ score=996 (second best: 0x00=’?’ score=988)
Reading at malicious_x = 0xffffffffffdfebf2... Unclear: 0x65=’e’ score=999 (second best: 0x00=’?’ score=985)
Reading at malicious_x = 0xffffffffffdfebf3... Unclear: 0x20=’ ’ score=997 (second best: 0x00=’?’ score=989)
Reading at malicious_x = 0xffffffffffdfebf4... Unclear: 0x4D=’M’ score=999 (second best: 0x00=’?’ score=993)
Reading at malicious_x = 0xffffffffffdfebf5... Unclear: 0x61=’a’ score=998 (second best: 0x00=’?’ score=991)
Reading at malicious_x = 0xffffffffffdfebf6... Unclear: 0x67=’g’ score=996 (second best: 0x00=’?’ score=988)
Reading at malicious_x = 0xffffffffffdfebf7... Unclear: 0x69=’i’ score=998 (second best: 0x00=’?’ score=987)
Reading at malicious_x = 0xffffffffffdfebf8... Unclear: 0x63=’c’ score=999 (second best: 0x00=’?’ score=989)
Reading at malicious_x = 0xffffffffffdfebf9... Unclear: 0x20=’ ’ score=999 (second best: 0x00=’?’ score=989)
Reading at malicious_x = 0xffffffffffdfebfa... Unclear: 0x57=’W’ score=998 (second best: 0x5B=’[’ score=985)
Reading at malicious_x = 0xffffffffffdfebfb... Unclear: 0x6F=’o’ score=998 (second best: 0x00=’?’ score=988)
Reading at malicious_x = 0xffffffffffdfebfc... Unclear: 0x00=’?’ score=985 (second best: 0xF7=’?’ score=942)
Reading at malicious_x = 0xffffffffffdfebfd... Unclear: 0x64=’d’ score=999 (second best: 0x00=’?’ score=990)
Reading at malicious_x = 0xffffffffffdfebfe... Unclear: 0x73=’s’ score=998 (second best: 0x00=’?’ score=984)
Reading at malicious_x = 0xffffffffffdfebff... Unclear: 0x20=’ ’ score=998 (second best: 0x00=’?’ score=985)
Reading at malicious_x = 0xffffffffffdfec00... Unclear: 0x61=’a’ score=999 (second best: 0x00=’?’ score=984)
Reading at malicious_x = 0xffffffffffdfec01... Unclear: 0x72=’r’ score=999 (second best: 0x00=’?’ score=986)
Reading at malicious_x = 0xffffffffffdfec02... Unclear: 0x65=’e’ score=998 (second best: 0x00=’?’ score=980)
Reading at malicious_x = 0xffffffffffdfec03... Unclear: 0x20=’ ’ score=998 (second best: 0x00=’?’ score=992)
Reading at malicious_x = 0xffffffffffdfec04... Unclear: 0x53=’S’ score=997 (second best: 0x50=’P’ score=990)
Reading at malicious_x = 0xffffffffffdfec05... Unclear: 0x71=’q’ score=998 (second best: 0x00=’?’ score=984)
Reading at malicious_x = 0xffffffffffdfec06... Unclear: 0x75=’u’ score=999 (second best: 0x72=’r’ score=976)
Reading at malicious_x = 0xffffffffffdfec07... Unclear: 0x65=’e’ score=999 (second best: 0x00=’?’ score=988)
Reading at malicious_x = 0xffffffffffdfec08... Unclear: 0x61=’a’ score=999 (second best: 0x00=’?’ score=986)
Reading at malicious_x = 0xffffffffffdfec09... Unclear: 0x6D=’m’ score=999 (second best: 0x00=’?’ score=987)
Reading at malicious_x = 0xffffffffffdfec0a... Unclear: 0x69=’i’ score=998 (second best: 0x00=’?’ score=987)
Reading at malicious_x = 0xffffffffffdfec0b... Unclear: 0x73=’s’ score=984 (second best: 0x00=’?’ score=974)
Reading at malicious_x = 0xffffffffffdfec0c... Unclear: 0x00=’?’ score=991 (second best: 0xB4=’?’ score=933)
Reading at malicious_x = 0xffffffffffdfec0d... Unclear: 0x20=’ ’ score=999 (second best: 0x00=’?’ score=986)
Reading at malicious_x = 0xffffffffffdfec0e... Unclear: 0x4F=’O’ score=998 (second best: 0x50=’P’ score=991)
Reading at malicious_x = 0xffffffffffdfec0f... Unclear: 0x73=’s’ score=999 (second best: 0x00=’?’ score=987)
Reading at malicious_x = 0xffffffffffdfec10... Unclear: 0x73=’s’ score=998 (second best: 0x00=’?’ score=971)
Reading at malicious_x = 0xffffffffffdfec11... Unclear: 0x69=’i’ score=999 (second best: 0x00=’?’ score=980)
Reading at malicious_x = 0xffffffffffdfec12... Unclear: 0x66=’f’ score=998 (second best: 0x00=’?’ score=978)
Reading at malicious_x = 0xffffffffffdfec13... Unclear: 0x72=’r’ score=995 (second best: 0x00=’?’ score=981)
Reading at malicious_x = 0xffffffffffdfec14... Unclear: 0x61=’a’ score=996 (second best: 0x00=’?’ score=971)
Reading at malicious_x = 0xffffffffffdfec15... Unclear: 0x67=’g’ score=999 (second best: 0x00=’?’ score=975)
Reading at malicious_x = 0xffffffffffdfec16... Unclear: 0x65=’e’ score=999 (second best: 0x00=’?’ score=984)
Reading at malicious_x = 0xffffffffffdfec17... Unclear: 0x2E=’.’ score=999 (second best: 0x00=’?’ score=987)


---------------------------------------------------------------------------------------------------------------------
CPU:    Intel(R) Core(TM) i5 CPU       M 460  @ 2.53GHz
Kernel: 4.16.5-13.1-default
cat /sys/devices/system/cpu/vulnerabilities/spectre_v2
Mitigation: Full generic retpoline
cat /sys/devices/system/cpu/vulnerabilities/spectre_v1
Mitigation: __user pointer sanitization

  ./spectre.out
Using a cache hit threshold of 80.
Build: RDTSCP_SUPPORTED MFENCE_SUPPORTED CLFLUSH_SUPPORTED INTEL_MITIGATION_DISABLED LINUX_KERNEL_MITIGATION_DISABLED
Reading 40 bytes:
Reading at malicious_x = 0xffffffffffdfebe8... Success: 0x54=’T’ score=2
Reading at malicious_x = 0xffffffffffdfebe9... Success: 0x68=’h’ score=2
Reading at malicious_x = 0xffffffffffdfebea... Success: 0x65=’e’ score=2
Reading at malicious_x = 0xffffffffffdfebeb... Success: 0x20=’ ’ score=7 (second best: 0x21=’!’ score=1)
Reading at malicious_x = 0xffffffffffdfebec... Success: 0x4D=’M’ score=2
Reading at malicious_x = 0xffffffffffdfebed... Success: 0x61=’a’ score=2
Reading at malicious_x = 0xffffffffffdfebee... Success: 0x67=’g’ score=2
Reading at malicious_x = 0xffffffffffdfebef... Success: 0x69=’i’ score=7 (second best: 0xB2=’?’ score=1)
Reading at malicious_x = 0xffffffffffdfebf0... Success: 0x63=’c’ score=2
Reading at malicious_x = 0xffffffffffdfebf1... Success: 0x20=’ ’ score=2
Reading at malicious_x = 0xffffffffffdfebf2... Success: 0x57=’W’ score=2
Reading at malicious_x = 0xffffffffffdfebf3... Success: 0x6F=’o’ score=2
Reading at malicious_x = 0xffffffffffdfebf4... Success: 0x72=’r’ score=2
Reading at malicious_x = 0xffffffffffdfebf5... Success: 0x64=’d’ score=2
Reading at malicious_x = 0xffffffffffdfebf6... Success: 0x73=’s’ score=2
Reading at malicious_x = 0xffffffffffdfebf7... Success: 0x20=’ ’ score=2
Reading at malicious_x = 0xffffffffffdfebf8... Success: 0x61=’a’ score=2
Reading at malicious_x = 0xffffffffffdfebf9... Success: 0x72=’r’ score=7 (second best: 0x22=’"’ score=1)
Reading at malicious_x = 0xffffffffffdfebfa... Success: 0x65=’e’ score=2
Reading at malicious_x = 0xffffffffffdfebfb... Success: 0x20=’ ’ score=2
Reading at malicious_x = 0xffffffffffdfebfc... Success: 0x53=’S’ score=2
Reading at malicious_x = 0xffffffffffdfebfd... Success: 0x71=’q’ score=2
Reading at malicious_x = 0xffffffffffdfebfe... Success: 0x75=’u’ score=2
Reading at malicious_x = 0xffffffffffdfebff... Success: 0x65=’e’ score=2
Reading at malicious_x = 0xffffffffffdfec00... Success: 0x61=’a’ score=2
Reading at malicious_x = 0xffffffffffdfec01... Success: 0x6D=’m’ score=2
Reading at malicious_x = 0xffffffffffdfec02... Success: 0x69=’i’ score=2
Reading at malicious_x = 0xffffffffffdfec03... Success: 0x73=’s’ score=2
Reading at malicious_x = 0xffffffffffdfec04... Success: 0x68=’h’ score=2
Reading at malicious_x = 0xffffffffffdfec05... Success: 0x20=’ ’ score=2
Reading at malicious_x = 0xffffffffffdfec06... Success: 0x4F=’O’ score=2
Reading at malicious_x = 0xffffffffffdfec07... Success: 0x73=’s’ score=2
Reading at malicious_x = 0xffffffffffdfec08... Success: 0x73=’s’ score=2
Reading at malicious_x = 0xffffffffffdfec09... Success: 0x69=’i’ score=2
Reading at malicious_x = 0xffffffffffdfec0a... Success: 0x66=’f’ score=2
Reading at malicious_x = 0xffffffffffdfec0b... Success: 0x72=’r’ score=2
Reading at malicious_x = 0xffffffffffdfec0c... Success: 0x61=’a’ score=2
Reading at malicious_x = 0xffffffffffdfec0d... Success: 0x67=’g’ score=7 (second best: 0x42=’B’ score=1)
Reading at malicious_x = 0xffffffffffdfec0e... Success: 0x65=’e’ score=2
Reading at malicious_x = 0xffffffffffdfec0f... Success: 0x2E=’.’ score=2