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Bug 1783957 - Implement workaround in assembler for Intel's JCC errata [RHEL 8.2] [rhel-8.1.0.z]
Summary: Implement workaround in assembler for Intel's JCC errata [RHEL 8.2] [rhel-8.1...
Alias: None
Product: Red Hat Enterprise Linux 8
Classification: Red Hat
Component: binutils
Version: 8.2
Hardware: x86_64
OS: Linux
Target Milestone: rc
: 8.0
Assignee: Nick Clifton
QA Contact: Martin Cermak
Depends On: 1777002
TreeView+ depends on / blocked
Reported: 2019-12-16 10:28 UTC by RHEL Program Management Team
Modified: 2021-09-17 14:30 UTC (History)
8 users (show)

Fixed In Version: binutils-2.30-58.el8_1_0.1
Doc Type: Bug Fix
Doc Text:
Cause: A recently discovered problem in some Intel CPUs means that under certain circumstances it is possible for a machine instruction to be executed incorrectly. Consequence: A CPU with the flaw could fail to execute programs correctly. Fix: The full fix involves updating the microcode of vulnerable CPUs, which can result in a performance degradation. This update enables a workaround in the assembler instead. Recompiling a program with the workaround enabled will render a program immune to the vulnerability, although there will be a size increase and possibly a small performance hit. Note - the workaround is *not* enabled by default. In order to activate it this gcc command line option must be used: -Wa,-mbranches-within-32B-boundaries Result: Programs rebuilt with the above command line option specified will not be vulnerable to the Intel Jcc flaw.
Clone Of: 1777002
Last Closed: 2020-02-04 13:11:48 UTC
Type: ---
Target Upstream Version:

Attachments (Terms of Use)

System ID Private Priority Status Summary Last Updated
Red Hat Product Errata RHBA-2020:0338 0 None None None 2020-02-04 13:11:49 UTC

Comment 1 Nick Clifton 2019-12-16 13:18:49 UTC
Fixed in binutils-2.30-58.el8_1_0.1

Comment 5 errata-xmlrpc 2020-02-04 13:11:48 UTC
Since the problem described in this bug report should be
resolved in a recent advisory, it has been closed with a
resolution of ERRATA.

For information on the advisory, and where to find the updated
files, follow the link below.

If the solution does not work for you, open a new bug report.


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