tools/power turbostat: add NULL check after calloc()

Three calloc() calls in turbostat lack NULL return checks, leading to
potential NULL pointer dereferences on allocation failure:

1. rapl_perf_init(): the allocated `domain_visited` is used later via
   memset(domain_visited, 0, ...) without checking for NULL.

2. added_perf_counters_init_(): the allocated `domain_visited` is used
   later via memset() and domain_visited[next_domain] without checking
   for NULL.

3. pmt_add_counter(): the allocated `pcounter` is dereferenced
   immediately via strncpy(pcounter->name, ...) without checking for
   NULL.

Add NULL checks after each calloc(), using the same error handling
style already present in each function: err(-1, ...) for rapl_perf_init(),
errx(1, ...) for added_perf_counters_init_(), and return 1 for
pmt_add_counter().

Signed-off-by: longlong yan <yanlonglong@kylinos.cn>
Signed-off-by: Len Brown <len.brown@intel.com>

0 files changed, 0 insertions, 0 deletions