linux-kernel - [PATCH 0/5] perf jitdump: Fix PID namespace detection

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [thread-next>] [day] [month] [year] [list]

Message-ID: <20251105191626.34998-1-iii@linux.ibm.com>
Date: Wed,  5 Nov 2025 20:10:23 +0100
From: Ilya Leoshkevich <iii@...ux.ibm.com>
To: Arnaldo Carvalho de Melo <acme@...nel.org>
Cc: linux-kernel@...r.kernel.org, linux-perf-users@...r.kernel.org,
        Heiko Carstens <hca@...ux.ibm.com>, Vasily Gorbik <gor@...ux.ibm.com>,
        Alexander Gordeev <agordeev@...ux.ibm.com>,
        Ilya Leoshkevich <iii@...ux.ibm.com>
Subject: [PATCH 0/5] perf jitdump: Fix PID namespace detection

Hi,

I ran into a problem with perf jitdump not working with still running
namespaced processes and started (very slowly) working on a series that
allows perf to record accurate PID namespace information [1] and use
that instead of resorting to guesswork.

However, I realized that at least short-term it's possible to fix the
existing heuristic, so I've created this series. Patch 1 is the fix.
Patches 2-4 are small changes to the existing test, and patch 5 adds
a test that reproduces the situation that I'm facing.

[1] https://github.com/iii-i/linux/commits/iii/wip/nspid/

Best regards,
Ilya

Ilya Leoshkevich (5):
  perf jitdump: Fix PID namespace detection
  perf test java symbol: Get rid of shellcheck warnings
  perf test java symbol: Extract LIBJVMTI detection
  perf test java symbol: Fix a false negative in symbol regex
  perf test java symbol: Add PID namespace variant

 tools/perf/tests/shell/lib/setup_libjvmti.sh  |  18 +++
 tools/perf/tests/shell/test_java_symbol.sh    |  39 +++--
 .../tests/shell/test_java_symbol_pidns.sh     | 135 ++++++++++++++++++
 tools/perf/util/jitdump.c                     |  27 +++-
 tools/perf/util/namespaces.c                  |   9 ++
 tools/perf/util/namespaces.h                  |   2 +
 6 files changed, 201 insertions(+), 29 deletions(-)
 create mode 100644 tools/perf/tests/shell/lib/setup_libjvmti.sh
 create mode 100755 tools/perf/tests/shell/test_java_symbol_pidns.sh

-- 
2.51.1