This bug was fixed in the package linux - 3.13.0-145.194
---------------
linux (3.13.0-145.194) trusty; urgency=medium
* linux: 3.13.0-145.194 -proposed tracker (LP: #1761430)
* intel-microcode 3.20180312.0 causes lockup at login screen(w/ linux-
image-4.13.0-37-generic) (LP: #1759920) // CVE-2017-5715 (Spectre v2 Intel)
- Revert "UBUNTU: SAUCE: x86/mm: Only set IBPB when the new thread cannot
ptrace current thread"
- x86/speculation: Use Indirect Branch Prediction Barrier in context switch
* DKMS driver builds fail with: Cannot use CONFIG_STACK_VALIDATION=y, please
install libelf-dev, libelf-devel or elfutils-libelf-devel (LP: #1760876)
- [Packaging] include the retpoline extractor in the headers
* retpoline hints: primary infrastructure and initial hints (LP: #1758856)
- [Packaging] retpoline-extract: flag *0xNNN(%reg) branches
- x86/speculation, objtool: Annotate indirect calls/jumps for objtool
- x86/speculation, objtool: Annotate indirect calls/jumps for objtool on
32bit
- x86/paravirt, objtool: Annotate indirect calls
- x86/asm: Stop depending on ptrace.h in alternative.h
- [Packaging] retpoline -- add safe usage hint support
- [Packaging] retpoline-check -- only report additions
- [Packaging] retpoline -- widen indirect call/jmp detection
- [Packaging] retpoline -- elide %rip relative indirections
- [Packaging] retpoline -- clear hint information from packages
- SAUCE: modpost: add discard to non-allocatable whitelist
- KVM: x86: Make indirect calls in emulator speculation safe
- KVM: VMX: Make indirect call speculation safe
- x86/boot, objtool: Annotate indirect jump in secondary_startup_64()
- SAUCE: early/late -- annotate indirect calls in early/late initialisation
code
- SAUCE: vga_set_mode -- avoid jump tables
- [Config] retpoline -- switch to new format
- [Packaging] retpoline hints -- handle missing files when RETPOLINE not
enabled
- [Packaging] final-checks -- remove check for empty retpoline files
* retpoline: ignore %cs:0xNNN constant indirections (LP: #1752655)
- [Packaging] retpoline -- elide %cs:0xNNNN constants on i386
* Boot crash with Trusty 3.13 (LP: #1757193)
- Revert "UBUNTU: SAUCE: x86, extable: fix uaccess fixup detection"
- x86/mm: Expand the exception table logic to allow new handling options
* Segmentation fault in ldt_gdt_64 (LP: #1755817) // CVE-2017-5754
- x86/kvm: Rename VMX's segment access rights defines
- x86/signal/64: Fix SS if needed when delivering a 64-bit signal
-- Kleber Sacilotto de Souza <kleber.so...@canonical.com> Thu, 05 Apr
2018 16:26:39 +0200
** Changed in: linux (Ubuntu Trusty)
Status: Fix Committed => Fix Released
** CVE added: https://cve.mitre.org/cgi-bin/cvename.cgi?name=2017-5715
** CVE added: https://cve.mitre.org/cgi-bin/cvename.cgi?name=2017-5754
** Changed in: linux (Ubuntu Xenial)
Status: Fix Committed => Fix Released
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https://bugs.launchpad.net/bugs/1758856
Title:
retpoline hints: primary infrastructure and initial hints
Status in linux package in Ubuntu:
Fix Released
Status in linux source package in Trusty:
Fix Released
Status in linux source package in Xenial:
Fix Released
Status in linux source package in Artful:
Fix Committed
Status in linux source package in Bionic:
Fix Released
Bug description:
Tracking bug for the application of the retpoline hint tracking
support.
We are having terrible trouble with hints changing on every build.
Upstream is moving to hinting those indirections which have been
reviewed and are good. This includes direct hinting of PVOPS and the
like which are the ones which change all the time as new ones appear
and dissappear.
Backport the hint support and add our own bespoke checkers against
this data.
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