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(parent: 6744c0b) | patch
libperf cpumap: Fix perf_cpu_map__max for an empty/NULL map
authorIan Rogers <irogers@google.com>
Wed, 3 Dec 2025 21:47:01 +0000 (13:47 -0800)
committerNamhyung Kim <namhyung@kernel.org>
Thu, 4 Dec 2025 08:36:14 +0000 (00:36 -0800)
commita0a4173631bfcfd3520192c0a61cf911d6a52c3a
treead012fd6b8169e7a1af4d9e3ccf58ae4301937d9tree | snapshot
parent6744c0b182c1f371135bc3f4e62b96ad884c9f89commit | diff
libperf cpumap: Fix perf_cpu_map__max for an empty/NULL map

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>
tools/lib/perf/cpumap.c diff | blob | blame | history
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