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Subject: [FreeBSD-Announce] FreeBSD Errata Notice FreeBSD-EN-21:10.lldb
From: FreeBSD Errata Notices <This email address is being protected from spambots. You need JavaScript enabled to view it.>
Date: Tue, 6 Apr 2021 20:22:29 +0000 (UTC)
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=============================================================================
FreeBSD-EN-21:10.lldb Errata Notice
The FreeBSD Project
Topic: lldb abort on print command
Category: contrib
Module: lldb
Announced: 2021-04-06
Affects: FreeBSD 12.2
Corrected: 2020-10-31 18:42:03 UTC (stable/12, 12.2-STABLE)
2021-04-06 19:21:27 UTC (releng/12.2, 12.2-RELEASE-p6)
For general information regarding FreeBSD Errata Notices and Security
Advisories, including descriptions of the fields above, security
branches, and the following sections, please visit
<URL:https://security.FreeBSD.org/>.
I. Background
lldb is the debugger from the LLVM project. Version 10.0.1 is included
in FreeBSD 12.2.
II. Problem Description
Attempts to use lldb's `print` command (`p` alias) resulted in lldb
aborting.
III. Impact
Some common debugger functionality cannot be used.
IV. Workaround
No general workaround is available. Information provided by certain print
expressions may be available by using other commands, such as
`frame variable` (`fr v` alias).
V. Solution
Upgrade your system to a supported FreeBSD stable or release / security
branch (releng) dated after the correction date.
Perform one of the following:
1) To update your system via a binary patch:
Systems running a RELEASE version of FreeBSD on the i386 or amd64
platforms can be updated via the freebsd-update(8) utility:
# freebsd-update fetch
# freebsd-update install
2) To update your system via a source code patch:
The following patches have been verified to apply to the applicable
FreeBSD release branches.
a) Download the relevant patch from the location below, and verify the
detached PGP signature using your PGP utility.
# fetch https://security.FreeBSD.org/patches/EN-21:10/lldb.patch
# fetch https://security.FreeBSD.org/patches/EN-21:10/lldb.patch.asc
# gpg --verify lldb.patch.asc
b) Apply the patch. Execute the following commands as root:
# cd /usr/src
# patch < /path/to/patch
c) Recompile the operating system using buildworld and installworld as
described in <URL:https://www.FreeBSD.org/handbook/makeworld.html>.
VI. Correction details
The following list contains the correction revision numbers for each
affected branch.
Branch/path Revision
- -------------------------------------------------------------------------
stable/12/ r367228
releng/12.2/ r369555
- -------------------------------------------------------------------------
To see which files were modified by a particular revision, run the
following command, replacing NNNNNN with the revision number, on a
machine with Subversion installed:
# svn diff -cNNNNNN --summarize svn://svn.freebsd.org/base
Or visit the following URL, replacing NNNNNN with the revision number:
<URL:https://svnweb.freebsd.org/base?view=revision&revision=NNNNNN>
VII. References
<URL:https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=248745>
The latest revision of this advisory is available at
<URL:https://security.FreeBSD.org/advisories/FreeBSD-EN-21:10.lldb.asc>
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