[PATCH linux-next] tools/power/x86/intel_pstate_tracer: Use absolute path for grep

[cgel . zte]

From: Xu Panda <xu.panda@xxxxxxxxxx>

Not using absolute path when invoking grep can lead to serious
security issues

Reported-by: Zeal Robot <zealci@xxxxxxxxxx>
Signed-off-by: Xu Panda <xu.panda@xxxxxxxxxx>
Reviewed-by: zhanglin <zhang.lin16@xxxxxxxxxx>
---
 tools/power/x86/intel_pstate_tracer/intel_pstate_tracer.py | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/tools/power/x86/intel_pstate_tracer/intel_pstate_tracer.py b/tools/power/x86/intel_pstate_tracer/intel_pstate_tracer.py
index b46e9eb8f5aa..d6fae6e51d30 100755
--- a/tools/power/x86/intel_pstate_tracer/intel_pstate_tracer.py
+++ b/tools/power/x86/intel_pstate_tracer/intel_pstate_tracer.py
@@ -348,8 +348,8 @@ def split_csv(current_max_cpu, cpu_mask):
     if os.path.exists('cpu.csv'):
         for index in range(0, current_max_cpu + 1):
             if cpu_mask[int(index)] != 0:
-                os.system('grep -m 1 common_cpu cpu.csv > cpu{:0>3}.csv'.format(index))
-                os.system('grep CPU_{:0>3} cpu.csv >> cpu{:0>3}.csv'.format(index, index))
+                os.system('/usr/bin/grep -m 1 common_cpu cpu.csv > cpu{:0>3}.csv'.format(index))
+                os.system('/usr/bin/grep CPU_{:0>3} cpu.csv >> cpu{:0>3}.csv'.format(index, index))

 def fix_ownership(path):
     """Change the owner of the file to SUDO_UID, if required"""
-- 
2.15.2