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tools/power turbostat: Fix illegal memory access when SMT is present and disabled

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When SMT is present and disabled, turbostat may under-size
the thread_data array.  This can corrupt results or
cause turbostat to exit with a segmentation fault.

[lenb: commit message]
Fixes: a2b4d0f8bf ("tools/power turbostat: Favor cpu# over core#")
Signed-off-by: Zhang Rui <rui.zhang@intel.com>
Signed-off-by: Len Brown <len.brown@intel.com>
This commit is contained in:
Zhang Rui 2026-03-04 08:30:12 +08:00 committed by Len Brown
parent 1f318b96cc
commit 57d2371d52
1 changed files with 2 additions and 3 deletions
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5
tools/power/x86/turbostat/turbostat.c
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@ -9702,13 +9702,12 @@ void allocate_counters(struct counters *counters)
{
int i;
int num_cores = topo.cores_per_node * topo.nodes_per_pkg * topo.num_packages;
int num_threads = topo.threads_per_core * num_cores;
counters->threads = calloc(num_threads, sizeof(struct thread_data));
counters->threads = calloc(topo.max_cpu_num + 1, sizeof(struct thread_data));
if (counters->threads == NULL)
goto error;
for (i = 0; i < num_threads; i++)
for (i = 0; i < topo.max_cpu_num + 1; i++)
(counters->threads)[i].cpu_id = -1;
counters->cores = calloc(num_cores, sizeof(struct core_data));