linux-kernel - [PATCH v2 0/5] Various fixes around undefined behavior

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Message-ID: <20250821163820.1132977-1-irogers@google.com>
Date: Thu, 21 Aug 2025 09:38:14 -0700
From: Ian Rogers <irogers@...gle.com>
To: Peter Zijlstra <peterz@...radead.org>, Ingo Molnar <mingo@...hat.com>, 
	Arnaldo Carvalho de Melo <acme@...nel.org>, Namhyung Kim <namhyung@...nel.org>, 
	Mark Rutland <mark.rutland@....com>, 
	Alexander Shishkin <alexander.shishkin@...ux.intel.com>, Jiri Olsa <jolsa@...nel.org>, 
	Ian Rogers <irogers@...gle.com>, Adrian Hunter <adrian.hunter@...el.com>, 
	Kan Liang <kan.liang@...ux.intel.com>, Chun-Tse Shao <ctshao@...gle.com>, 
	Blake Jones <blakejones@...gle.com>, James Clark <james.clark@...aro.org>, 
	Jan Polensky <japo@...ux.ibm.com>, Collin Funk <collin.funk1@...il.com>, 
	Howard Chu <howardchu95@...il.com>, Thomas Gleixner <tglx@...utronix.de>, 
	Nam Cao <namcao@...utronix.de>, Li Huafei <lihuafei1@...wei.com>, 
	"Steinar H. Gunderson" <sesse@...gle.com>, Athira Rajeev <atrajeev@...ux.ibm.com>, 
	linux-perf-users@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: [PATCH v2 0/5] Various fixes around undefined behavior

Fix various undefined behavior issues, improve tests to make them
easier to diagnose and add assertions so that problems don't recur.

v2: Add Namhyung's acked-by. Drop container_of assert that ptr !=
    NULL, to simplify the series. The bsearch UB fix was picked up as
    a patch by CT:
    https://lore.kernel.org/r/20250303183646.327510-2-ctshao@google.com
    It seems this patch series fell-through the cracks as v1 was
    sent/acked 9 months ago.

v1: https://lore.kernel.org/lkml/20241213210425.526512-1-irogers@google.com/

Ian Rogers (5):
  perf disasm: Avoid undefined behavior in incrementing NULL
  perf test trace_btf_enum: Skip if permissions are insufficient
  perf evsel: Avoid container_of on a NULL leader
  perf test shell lock_contention: Extra debug diagnostics
  libperf event: Ensure tracing data is multiple of 8 sized

 tools/lib/perf/include/perf/event.h       |  1 +
 tools/perf/tests/shell/lock_contention.sh |  7 ++++++-
 tools/perf/tests/shell/trace_btf_enum.sh  | 11 +++++++++++
 tools/perf/util/disasm.c                  |  7 +++++--
 tools/perf/util/evsel.c                   |  2 ++
 5 files changed, 25 insertions(+), 3 deletions(-)

-- 
2.51.0.rc1.193.gad69d77794-goog