tools/power turbostat: fix buffer overrun

[ Upstream commit eeb71c950bc6eee460f2070643ce137e067b234c ]

turbostat could be terminated by general protection fault on some latest
hardwares which (for example) support 9 levels of C-states and show 18
"tADDED" lines. That bloats the total output and finally causes buffer
overrun.  So let's extend the buffer to avoid this.

Signed-off-by: Naoya Horiguchi <n-horiguchi@ah.jp.nec.com>
Signed-off-by: Len Brown <len.brown@intel.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>

diff --git a/tools/power/x86/turbostat/turbostat.c b/tools/power/x86/turbostat/turbostat.c
index fbb53c9..71cf7e7 100644 (file)
--- a/tools/power/x86/turbostat/turbostat.c
+++ b/tools/power/x86/turbostat/turbostat.c
@@ -4953,7 +4953,7 @@ int initialize_counters(int cpu_id)
 
 void allocate_output_buffer()
 {
-       output_buffer = calloc(1, (1 + topo.num_cpus) * 1024);
+       output_buffer = calloc(1, (1 + topo.num_cpus) * 2048);
        outp = output_buffer;
        if (outp == NULL)
                err(-1, "calloc output buffer");