1 |
On 08/17 09:06, Alexander Kapshuk wrote: |
2 |
> On Fri, Aug 17, 2018 at 8:58 AM Alexander Kapshuk |
3 |
> <alexander.kapshuk@×××××.com> wrote: |
4 |
> > |
5 |
> > On Fri, Aug 17, 2018 at 8:57 AM Alexander Kapshuk |
6 |
> > <alexander.kapshuk@×××××.com> wrote: |
7 |
> > > |
8 |
> > > On Fri, Aug 17, 2018 at 8:10 AM <tuxic@××××××.de> wrote: |
9 |
> > > > |
10 |
> > > > On 08/17 02:53, Adam Carter wrote: |
11 |
> > > > > On Fri, Aug 17, 2018 at 1:15 PM, <tuxic@××××××.de> wrote: |
12 |
> > > > > |
13 |
> > > > > > Hi, |
14 |
> > > > > > |
15 |
> > > > > > CPU bugs seem to be more and more common: |
16 |
> > > > > > https://www.heise.de/security/meldung/Linux-Kernel-und- |
17 |
> > > > > > Distributionen-schuetzen-vor-Prozessorluecke-Foreshadow-L1TF-4137264.html |
18 |
> > > > > > https://www.heise.de/security/meldung/Spectre-NG-Foreshadow- |
19 |
> > > > > > gefaehrdet-Intel-Prozessoren-4137209.html |
20 |
> > > > > > (sorry, I only know of this german spoken references...) |
21 |
> > > > > > |
22 |
> > > > > > With Linux kernel 4.18.1 Linus has introduced a fix (aka workaround) |
23 |
> > > > > > of the Foreshadow bug. |
24 |
> > > > > > |
25 |
> > > > > |
26 |
> > > > > 4.18, 4.17, 4.14, 4.9, and 4.4 have all had the fixes applied. |
27 |
> > > > > |
28 |
> > > > > > |
29 |
> > > > > > Unfortunately compiling that kernel (as downloaded from |
30 |
> > > > > > https://mirrors.edge.kernel.org/pub/linux/kernel/v4.x/ ) |
31 |
> > > > > > |
32 |
> > > > > > gives me this bug: |
33 |
> > > > > > |
34 |
> > > > > |
35 |
> > > > > gentoo-sources with gcc 7.3 builds fine for me. |
36 |
> > > > > |
37 |
> > > > > Intel: grep . /sys/devices/system/cpu/vulnerabilities/* |
38 |
> > > > > /sys/devices/system/cpu/vulnerabilities/l1tf:Mitigation: PTE Inversion |
39 |
> > > > > /sys/devices/system/cpu/vulnerabilities/meltdown:Mitigation: PTI |
40 |
> > > > > /sys/devices/system/cpu/vulnerabilities/spec_store_bypass:Mitigation: |
41 |
> > > > > Speculative Store Bypass disabled via prctl and seccomp |
42 |
> > > > > /sys/devices/system/cpu/vulnerabilities/spectre_v1:Mitigation: __user |
43 |
> > > > > pointer sanitization |
44 |
> > > > > /sys/devices/system/cpu/vulnerabilities/spectre_v2:Mitigation: Full generic |
45 |
> > > > > retpoline, IBPB, IBRS_FW |
46 |
> > > > > |
47 |
> > > > > AMD: grep . /sys/devices/system/cpu/vulnerabilities/* |
48 |
> > > > > /sys/devices/system/cpu/vulnerabilities/l1tf:Not affected |
49 |
> > > > > /sys/devices/system/cpu/vulnerabilities/meltdown:Not affected |
50 |
> > > > > /sys/devices/system/cpu/vulnerabilities/spec_store_bypass:Mitigation: |
51 |
> > > > > Speculative Store Bypass disabled via prctl and seccomp |
52 |
> > > > > /sys/devices/system/cpu/vulnerabilities/spectre_v1:Mitigation: __user |
53 |
> > > > > pointer sanitization |
54 |
> > > > > /sys/devices/system/cpu/vulnerabilities/spectre_v2:Mitigation: Full AMD |
55 |
> > > > > retpoline, IBPB |
56 |
> > > > |
57 |
> > > > Hi, |
58 |
> > > > |
59 |
> > > > I am happy, that other sources do work for you Adam. |
60 |
> > > > |
61 |
> > > > Interesting would be, why the original sources does not compile for |
62 |
> > > > me. |
63 |
> > > > Any idea? |
64 |
> > > > |
65 |
> > > > |
66 |
> > > > |
67 |
> > > |
68 |
> > > This problem has been reported upstream. See below. |
69 |
> > > https://lkml.org/lkml/2018/8/15/118 |
70 |
> > > |
71 |
> > > In particular: |
72 |
> > > |
73 |
> > > Build is successful with |
74 |
> > > CONFIG_KVM=y |
75 |
> > > CONFIG_KVM_INTEL=y |
76 |
> > > CONFIG_KVM_AMD=y |
77 |
> > > but fails if only |
78 |
> > > CONFIG_KVM=y |
79 |
> > > CONFIG_KVM_AMD=y |
80 |
> > > are selected. |
81 |
> > |
82 |
> > And a follow up email with a reference to a patch that addresses the issue: |
83 |
> > https://lkml.org/lkml/2018/8/15/122 |
84 |
> |
85 |
> The patch in question will become available in 4.18.2 upstream. See |
86 |
> the link below. |
87 |
> https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux-stable-rc.git/commit/?h=linux-4.18.y&id=eca268a3133cafcd188d85489f08a7c5907d985d |
88 |
> |
89 |
|
90 |
|
91 |
Hi Alexander, |
92 |
|
93 |
THAT's helpful! Yeah! Thanks a lot! |
94 |
|
95 |
The only question for me remains: Why does www.startpage.com (search |
96 |
engine) couldn' find that (I tried that before....) ? |
97 |
|
98 |
Cheers! |
99 |
Meino |
100 |
|
101 |
PS: The recompiling-engine has already powered up and restarted...all |
102 |
motors are working heavily... :::))) |