Ian Rogers 9a9a9b88a8 libperf cpumap: Fix perf_cpu_map__max for an empty/NULL map ...

[ Upstream commit a0a4173631 ]

Passing an empty map to perf_cpu_map__max triggered a SEGV. Explicitly
test for the empty map.

Reported-by: Ingo Molnar <mingo@kernel.org>
Closes: https://lore.kernel.org/linux-perf-users/aSwt7yzFjVJCEmVp@gmail.com/
Tested-by: Ingo Molnar <mingo@kernel.org>
Signed-off-by: Ian Rogers <irogers@google.com>
Tested-by: Thomas Richter <tmricht@linux.ibm.com>
Signed-off-by: Namhyung Kim <namhyung@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>

2026-01-02 12:57:02 +01:00

..

Documentation

perf record: Add 8-byte aligned event type PERF_RECORD_COMPRESSED2

2025-05-16 17:31:40 -03:00

include

libperf event: Ensure tracing data is multiple of 8 sized

2025-09-03 12:34:54 -03:00

tests

libperf cpumap: Replace usage of perf_cpu_map__new(NULL) with perf_cpu_map__new_online_cpus()

2023-12-12 14:55:13 -03:00

.gitignore

libperf: Add gitignore

2024-08-01 12:11:33 -03:00

Build

libperf: Change tests to single static and shared binaries

2021-07-07 11:41:58 -03:00

core.c

libperf: Move to tools/lib/perf

2020-01-06 11:46:09 -03:00

cpumap.c

libperf cpumap: Fix perf_cpu_map__max for an empty/NULL map

2026-01-02 12:57:02 +01:00

evlist.c

perf parse-events: Support user CPUs mixed with threads/processes

2025-07-24 13:41:35 -07:00

evsel.c

libperf evsel: Factor perf_evsel__exit out of perf_evsel__delete

2025-07-24 13:41:35 -07:00

internal.h

libperf: Move to tools/lib/perf

2020-01-06 11:46:09 -03:00

lib.c

libperf: Add preadn()

2022-05-23 10:11:12 -03:00

libperf.map

libperf cpumap: Remove perf_cpu_map__read()

2024-12-09 17:52:41 -03:00

libperf.pc.template

libperf: Move to tools/lib/perf

2020-01-06 11:46:09 -03:00

Makefile

perf tools: Fix in-source libperf build

2025-04-29 12:32:31 -07:00

mmap.c

libperf mmap: In user mmap rdpmc avoid undefined behavior

2025-10-02 15:02:47 -03:00

threadmap.c

libperf threadmap: Add perf_thread_map__idx()

2025-05-21 15:07:13 -03:00

xyarray.c

libperf: Move to tools/lib/perf

2020-01-06 11:46:09 -03:00