From 707b1dba99323c80ed9730870f6eab949f5b9b98 Mon Sep 17 00:00:00 2001
From: Arun Sharma <asharma@fb.com>
Date: Sat, 4 Aug 2012 18:01:46 -0700
Subject: [PATCH] Fix a SIGSEGV in test-ptrace.c

./test-ptrace -v resulted in a SIGSEGV.
---
 tests/test-ptrace.c | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/tests/test-ptrace.c b/tests/test-ptrace.c
index c9f8f2e9..8f2e1cb1 100644
--- a/tests/test-ptrace.c
+++ b/tests/test-ptrace.c
@@ -204,6 +204,8 @@ main (int argc, char **argv)
 	  ++optind, print_names = 0;
 	else
 	  fprintf(stderr, "unrecognized option: %s\n", argv[optind++]);
+        if (optind >= argc)
+          break;
       }
 
   target_pid = fork ();
@@ -221,6 +223,11 @@ main (int argc, char **argv)
 #else
 #error Trace me
 #endif
+
+      if (optind == argc) {
+        fprintf(stderr, "Need to specify a command line for the child\n");
+        exit (-1);
+      }
       execve (argv[optind], argv + optind, environ);
       _exit (-1);
     }