FUT92715 Solve the Paradox SUSE Linux Enterprise Live Patching Roadmap
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1 FUT92715 Solve the Paradox SUSE Linux Enterprise Live Patching Roadmap Tuesday, Nov 8, 11:30 AM - 12:30 PM Friday, Nov 11, 9:00 AM - 10:00 AM Hannes Kühnemund SUSE Product Management Vojtěch Pavlík Director SUSE Labs
![Sound familiar? [ Streaming Service hosted by 3rd party] LIVE SERVER DOWNTIME - 2.15 IS HERE! UPDATE Update: We continue to work on server maintenance in advance of upgrading the game version.](/docs-images/85/93054513/images/2-0.jpg "Update 2: The issue with our server maintenance continues to take longer than expected. Update 4: So it turns out that it's a bit harder than we all wished.")
2 Sound familiar? [ Streaming Service hosted by 3rd party] LIVE SERVER DOWNTIME IS HERE! UPDATE Update: We continue to work on server maintenance in advance of upgrading the game version. Update 2: The issue with our server maintenance continues to take longer than expected. Update 4: So it turns out that it's a bit harder than we all wished. [ Hoster of an online game ] [ Hosting Service for Developers ] 2
3 Downtime Quiz planned Regular cadence - monthly - quarterly - yearly On the weekend In alignment with all stakeholders Combination of Taks - software updates / configuration - hardware exchange of defect parts - datacenter maintenance / AC Optimizable with - SUSE Manager 3
4 Downtime Quiz planned unplanned Regular cadence - monthly - quarterly - yearly On the weekend In alignment with all stakeholders Combination of Taks - software updates / configuration - hardware exchange of defect parts - datacenter maintenance / AC Optimizable with - SUSE Manager 4
5 Downtime Quiz planned unplanned Regular cadence - monthly - quarterly - yearly On the weekend In alignment with all stakeholders Combination of Taks - software updates / configuration - hardware exchange of defect parts - datacenter maintenance / AC Optimizable with No cadence - SUSE Manager 5
6 Downtime Quiz planned unplanned Regular cadence - monthly - quarterly - yearly On the weekend In alignment with all stakeholders Combination of Taks - software updates / configuration - hardware exchange of defect parts - datacenter maintenance / AC Optimizable with No cadence Usually on Christmas Day - SUSE Manager 6
7 Downtime Quiz planned unplanned Regular cadence - monthly - quarterly - yearly On the weekend In alignment with all stakeholders Combination of Taks - software updates / configuration - hardware exchange of defect parts - datacenter maintenance / AC Optimizable with No cadence Usually on Christmas Day No alignment with stakeholders - SUSE Manager 7
8 Downtime Quiz planned unplanned Regular cadence - monthly - quarterly - yearly On the weekend In alignment with all stakeholders Combination of Taks - software updates / configuration - hardware exchange of defect parts - datacenter maintenance / AC Optimizable with No cadence Usually on Christmas Day No alignment with stakeholders Only one particular problem fixed - SUSE Manager 8
9 Downtime Quiz planned unplanned Regular cadence No cadence - monthly - quarterly - yearly On the weekend Usually on Christmas Day In alignment with all stakeholders No alignment with stakeholders Combination of Taks Only one particular problem fixed - software updates / configuration - hardware exchange of defect parts - datacenter maintenance / AC Optimizable with Optimizable with - SUSE Manager - Various technologies available 9
10 Minimize Unplanned Downtime UPS RAS System Rollback RAID High Availability and GEO Virtualization Load Balancer? 10
11 Strike the balance? 11
12 Strike the balance? No Downtime Security 12
13 Since 2005, more than 75 data breaches in which 1,000,000 or more records were compromised have been publicly disclosed. But what about the non-disclosed ones? 13
14 Vulnerabilities Year # vulnerabilities % Vulnerability type % Operating System Browsers Mobile Devices Rank Operating System # vulnerabilities Apple OS X Microsoft Windows Server Canonical Ubuntu Linux Microsoft Windows % 16% Applications The 77 Source: [ & [ & [ 14
15 In a data center, not so long ago 15
16 In a data center, not so long ago Nov-11, 2015 December 2015 January February March April May June July August September 16
17 In a data center, not so long ago Nov-11, 2015 CVE CVE CVE December 2015 January February March April May June July August September 17
18 In a data center, not so long ago Nov-11, 2015 CVE CVE CVE CVE: NVD: Common Vulnerabilities and Exposures It is a standard naming scheme used by the NVD National Vulnerability Database ( December 2015 January February March April May June July August September 18
19 In a data center, not so long ago Nov-11, 2015 CVE CVE CVE December 2015 January February March April May June July August September 19
20 In a data center, not so long ago Nov-11, 2015 CVE CVE CVE Reboot Dec-11, 2015 December 2015 January February March April May June July August September 20
21 In a data center, not so long ago Nov-11, 2015 CVE CVE CVE CVE Dec-11, 2015 CVE December 2015 January February March April May June July August September 21
22 In a data center, not so long ago Nov-11, 2015 CVE CVE CVE CVE Dec-11, 2015 CVE Jan-15, Reboot December 2015 January February March April May June July August September 22
23 In a data center, not so long ago Nov-11, 2015 CVE CVE CVE CVE Dec-11, 2015 CVE Jan-15, December 2015 January February March April May June July August September 23
24 In a data center, not so long ago Nov-11, 2015 CVE CVE CVE CVE Dec-11, 2015 CVE Jan-15, Reboot Feb-10, December 2015 January February March April May June July August September 24
25 In a data center, not so long ago Nov-11, 2015 CVE CVE CVE CVE CVE CVE Dec-11, 2015 CVE CVE CVE Jan-15, CVE CVE Feb-10, CVE CVE December 2015 January February March April May June July August September 25
26 In a data center, not so long ago Nov-11, 2015 CVE CVE CVE CVE CVE CVE Dec-11, 2015 CVE CVE CVE Jan-15, CVE CVE Feb-10, CVE CVE Reboot Mar-22, December 2015 January February March April May June July August September 26
27 In a data center, not so long ago Nov-11, 2015 CVE CVE CVE CVE CVE CVE CVE CVE Dec-11, 2015 CVE CVE CVE CVE CVE Jan-15, CVE CVE CVE CVE Feb-10, CVE CVE CVE CVE Mar-22, CVE CVE December 2015 January February March April May June July August September 27
28 In a data center, not so long ago Nov-11, 2015 CVE CVE CVE CVE CVE CVE CVE CVE Dec-11, 2015 CVE CVE CVE CVE CVE Jan-15, CVE CVE CVE CVE Feb-10, CVE CVE CVE CVE Mar-22, CVE CVE Jun-09, Reboot December 2015 January February March April May June July August September 28
29 In a data center, not so long ago Nov-11, 2015 CVE CVE CVE CVE CVE CVE CVE CVE CVE Dec-11, 2015 CVE CVE CVE CVE CVE CVE Jan-15, CVE CVE CVE CVE CVE Feb-10, CVE CVE CVE CVE CVE Mar-22, CVE CVE CVE Jun-09, CVE December 2015 January February March April May June July August September 29
30 In a data center, not so long ago Nov-11, 2015 CVE CVE CVE CVE CVE CVE CVE CVE CVE Dec-11, 2015 CVE CVE CVE CVE CVE CVE Jan-15, CVE CVE CVE CVE CVE Feb-10, CVE CVE CVE CVE CVE Mar-22, CVE CVE CVE Jun-09, CVE Aug-16, Reboot December 2015 January February March April May June July August September 30
31 In a data center, not so long ago Nov-11, 2015 CVE CVE CVE CVE CVE CVE CVE CVE CVE CVE CVE CVE CVE CVE Dec-11, 2015 CVE CVE CVE CVE CVE CVE CVE CVE CVE CVE CVE Jan-15, CVE CVE CVE CVE CVE CVE CVE CVE CVE CVE Feb-10, CVE CVE CVE CVE CVE CVE CVE CVE CVE CVE Mar-22, CVE CVE CVE CVE CVE CVE CVE CVE Jun-09, CVE CVE CVE CVE CVE CVE Aug-16, CVE CVE CVE CVE CVE December 2015 January February March April May June July August September 31
32 In a data center, not so long ago Nov-11, 2015 CVE CVE CVE CVE CVE CVE CVE CVE CVE CVE CVE CVE CVE CVE Dec-11, 2015 CVE CVE CVE CVE CVE CVE CVE CVE CVE CVE CVE Jan-15, CVE CVE CVE CVE CVE CVE CVE CVE CVE CVE Feb-10, CVE CVE CVE CVE CVE CVE CVE CVE CVE CVE Mar-22, CVE CVE CVE CVE CVE CVE CVE CVE Jun-09, CVE CVE CVE CVE CVE CVE Aug-16, CVE CVE CVE CVE CVE Reboot Sep-12, December 2015 January February March April May June July August September 32
33 In a data center, not so long ago Nov-11, 2015 CVE CVE CVE CVE CVE CVE CVE CVE CVE CVE CVE CVE CVE CVE CVE Dec-11, 2015 CVE CVE CVE CVE CVE CVE CVE CVE CVE CVE CVE CVE Jan-15, CVE CVE CVE CVE CVE CVE CVE CVE CVE CVE CVE Feb-10, CVE CVE CVE CVE CVE CVE CVE CVE CVE CVE CVE Mar-22, CVE CVE CVE CVE CVE CVE CVE CVE CVE Jun-09, CVE CVE CVE CVE CVE CVE CVE Aug-16, CVE CVE CVE CVE CVE CVE Sample data taken on Sept-15, Sep-12, CVE December 2015 January February March April May June July August September 33
34 That reminds me of... 34
35 CVEs...? So what...? CVE gain privileges or cause a denial of service local users can bypass intended access restrictions gain privileges or cause a denial of service CVE allows local users to cause a denial of service CVE local users can cause a denial of service (OOPS) CVE local users can cause a denial of service (NULL pointer dereference and system crash) local users to bypass intended AF_UNIX socket permissions or cause a denial of service (panic)... 35
36 Can t we patch software while it runs? Mankind already flew to the moon 36
37 Minimize Unplanned Downtime UPS RAS System Rollback RAID High Availability and GEO Virtualization Load Balancer Live Patching 37
38 Dynamic Software Updates Trinity Test 1945 (Manhattan Project) IBM punch card automatic calculators were used to crunch the numbers A month before the Trinity nuclear device test, the question was: What will the yield be, how much energy will be released? The calculation would normally take three months to complete recalculating any batches with errors Multiple colored punch cards introduced to fix errors in calculations while the calculator was running 38
39 Modern history of kgraft and other DSU technologies DSU: Dynamic Software Updates the goal is to be able to fix bugs and add features either by - changing some functions or - replacing the whole program kgraft developed as Open Source project by SUSE Labs Upstream project klp Takes best of both kgraft (SUSE) and kpatch (Red Hat) Still in catch up w.r.t. to features required by enterprises PoDUS Gupta Erlang Ginseng UpStare kpatch Ksplice Kitsune kgraft klp
40 ftrace: return address modification mechanism 40
41 Common Pitfalls Function Inlining DWARF to the rescue Static Symbols kernel keeps list: kallsyms IPA-SRA (optimization like -O2) gcc optimization log Multiple functions / dependencies consistency model Eternal sleepers (getty console 10) send fake signal SIGKGRAFT / ignore State transformation (req. for complex fixes) not in kgraft right now 3rd party kernel modules depends on what the modules does... 41
42 Consistency Requirement: ensure system consistency when deploying live patches Freezing the system (kpatch, ksplice) Lazy migration (kgraft) 42
43 Consistency Requirement: ensure system consistency when deploying live patches Freezing the system (kpatch, ksplice) Lazy migration (kgraft) stop_kernel(); check all stacks, whether any thread is stopped within a patched function If yes, resume kernel and try again later If not, flip the switch on all functions and resume the kernel 43
44 Consistency Requirement: ensure system consistency when deploying live patches Freezing the system (kpatch, ksplice) Lazy migration (kgraft) stop_kernel(); For each thread separately: check all stacks, whether any thread is stopped within a patched function Present the old version of functions to the thread until it leaves the kernel then give it the updated version If yes, resume kernel and try again later Wake sleeping threads up by a special signal. Prevent the signal from reaching userspace If not, flip the switch on all functions and resume the kernel Once all threads have exited the kernel at least once we're DONE 44
45 Consistency Requirement: ensure system consistency when deploying live patches Freezing the system (kpatch, ksplice) Lazy migration (kgraft) stop_kernel(); For each thread separately: check all stacks, whether any thread is stopped within a patched function Present the old version of functions to the thread until it leaves the kernel then give it the updated version If yes, resume kernel and try again later Wake sleeping threads up by a special signal. Prevent the signal from reaching userspace If not, flip the switch on all functions and resume the kernel Once all threads have exited the kernel at least once we're DONE Do you have better ideas that those two? Join SUSE as Live Patching developer 45
46 Consistency model for KLP? The chosen model is a merge of kpatch and kgraft Combines stack checking and per-thread changes Non-intrusive, fast finishing Works well already but requires both: Reliable stack unwinder (needed by kpatch) Worked on by Josh Red Hat Currently needs FRAME POINTER up 10% slowdown of kernel execution Could use DWARF complex, being developed by SUSE speed is a concern initial implementation removed from upstream Kernel thread model cleanup (needed by kgraft) Worked on by Petr SUSE Touches both kthreads and workqueues These parts are the critical core Needs a lot of good planning and review Takes time Takes time 46
47 Live Patching on ppc64le? [ ] 47
48 In a SUSE data center, today ;-) 48
49 In a SUSE data center, today ;-) Nov-11, 2015 December 2015 January February March April May June July August September 49
50 In a SUSE data center, today ;-) Nov-11, 2015 CVE CVE CVE December 2015 January February March April May June July August September 50
51 In a SUSE data center, today ;-) Nov-11, 2015 Dec-11, 2015 December 2015 January February March April May June July August September 51
52 In a SUSE data center, today ;-) Nov-11, 2015 CVE Dec-11, 2015 CVE December 2015 January February March April May June July August September 52
53 In a SUSE data center, today ;-) Nov-11, 2015 Dec-11, 2015 Jan-15, December 2015 January February March April May June July August September 53
54 In a SUSE data center, today ;-) Nov-11, 2015 Dec-11, 2015 Jan-15, December 2015 January February March April May June July August September 54
55 In a SUSE data center, today ;-) Nov-11, 2015 Dec-11, 2015 Jan-15, Feb-10, December 2015 January February March April May June July August September 55
56 In a SUSE data center, today ;-) Nov-11, 2015 CVE CVE Dec-11, 2015 CVE CVE Jan-15, CVE CVE Feb-10, CVE CVE December 2015 January February March April May June July August September 56
57 In a SUSE data center, today ;-) Nov-11, 2015 Dec-11, 2015 Jan-15, Feb-10, Mar-22, December 2015 January February March April May June July August September 57
58 In a SUSE data center, today ;-) Nov-11, 2015 CVE CVE Dec-11, 2015 CVE CVE Jan-15, CVE CVE Feb-10, CVE CVE Mar-22, CVE CVE December 2015 January February March April May June July August September 58
59 In a SUSE data center, today ;-) Nov-11, 2015 Dec-11, 2015 Jan-15, Feb-10, Mar-22, Jun-09, December 2015 January February March April May June July August September 59
60 In a SUSE data center, today ;-) Nov-11, 2015 CVE Dec-11, 2015 CVE Jan-15, CVE Feb-10, CVE Mar-22, CVE Jun-09, CVE December 2015 January February March April May June July August September 60
61 In a SUSE data center, today ;-) Nov-11, 2015 Dec-11, 2015 Jan-15, Feb-10, Mar-22, Jun-09, Aug-16, December 2015 January February March April May June July August September 61
62 In a SUSE data center, today ;-) Nov-11, 2015 CVE CVE CVE CVE CVE Dec-11, 2015 CVE CVE CVE CVE CVE Jan-15, CVE CVE CVE CVE CVE Feb-10, CVE CVE CVE CVE CVE Mar-22, CVE CVE CVE CVE CVE Jun-09, CVE CVE CVE CVE CVE Aug-16, CVE CVE CVE CVE CVE December 2015 January February March April May June July August September 62
63 In a SUSE data center, today ;-) Nov-11, 2015 Dec-11, 2015 Jan-15, Feb-10, Mar-22, Jun-09, Aug-16, Sep-12, December 2015 January February March April May June July August September 63
64 In a SUSE data center, today ;-) Nov-11, 2015 CVE Dec-11, 2015 Sample data taken on Sept-15, CVE Jan-15, CVE Feb-10, CVE Mar-22, CVE Jun-09, CVE Aug-16, CVE Sep-12, CVE December 2015 January February March April May June July August September 64
65 In a SUSE data center, today ;-) Nov-11, 2015 Dec-11, 2015 Sample data taken on Sept-15, Jan-15, Feb-10, Mar-22, Jun-09, Aug-16, Sep-12, December 2015 January February March April May June July August September 65
66 In a SUSE data center, today ;-) Nov-11, 2015 CVE CVE CVE CVE CVE CVE CVE CVE CVE CVE CVE CVE CVE CVE CVE Dec-11, 2015 CVE CVE CVE CVE CVE CVE CVE CVE CVE CVE CVE CVE Jan-15, CVE CVE CVE CVE CVE CVE CVE CVE CVE CVE CVE Feb-10, CVE CVE CVE CVE CVE CVE CVE CVE CVE CVE CVE Mar-22, CVE CVE CVE CVE CVE CVE CVE CVE CVE Jun-09, CVE CVE CVE CVE CVE CVE CVE Aug-16, CVE CVE CVE CVE CVE CVE Sample data taken on Sept-15, Sep-12, CVE December 2015 January February March April May June July August September 66
67 Key Solution Highlights Available for SLES 12 onwards (x86-64) Provides fixes for Kernel bugs which affect Security Stability Data Integrity No runtime performance impact No interruption of applications while patching Allows full review of patch source code Build-in PTF support Patches available for most recent maintenance kernels (last 12 months) Currently based on kgraft OpenSource project 67
68 Where does SLE Live Patching make most sense?... and where not? What s your guess? 68
69 Where does SLE Live Patching make most sense?... and where not? What s your guess? (c) creativecommons.org/licenses/by/3.0 69
70 Where does SLE Live Patching make most sense?... and where not? What s your guess? (c) creativecommons.org/licenses/by/
71 Where does SLE Live Patching make most sense?... and where not? What s your guess? (c) creativecommons.org/licenses/by/3.0 (c) opensuse.org 71
72 Where does SLE Live Patching make most sense?... and where not? What s your guess? (c) creativecommons.org/licenses/by/3.0 SAP HANA (c) opensuse.org FUJITSU PRIMEQUEST 2800B, (c) Fujitsu 72
73 Outlook SLE Live Patching for ppc64le SLE Live Patching for IBM z Systems SLE Live Patching for Aarch64 User Space Live Patching Virtualization Live Patching 73
74 Your chance to win a 3ft (!) SUSE plush chameleon Receive Live Patching 60 day code for FREE here at SUSECON Register & logon to Activate code (60 day counter starts) Add Live Patching to your SLES 12 SPx server by December 31st using eval code This lets you join a drawing for the SUSE chameleon Drawing happens on February 28 Winner will be contacted by Chameleon will go on a journey After receiving the chameleon, winner sends selfie with chameleon back to SUSE ;-) 74
75 References One hour of downtime costs $100k for 95% of all enterprises Kernel Live Patching for ppc64le Forrester Linux vs. Unix Hot Patching have we reached the tipping point? Using Live Patching to patch a running SAP HANA system with zero interruption 75
76 Thank you Hannes Kühnemund SUSE Product Vojtěch Pavlík Director SUSE Labs 76
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