futex: Do not leak robust list to unprivileged process

[linux-flexiantxendom0-3.2.10.git] / kernel / ptrace.c

diff --git a/kernel/ptrace.c b/kernel/ptrace.c
index 4661c5b..ee8d49b 100644 (file)
--- a/kernel/ptrace.c
+++ b/kernel/ptrace.c
@@ -237,25 +237,10 @@ static int ptrace_attach(struct task_struct *task, long request,
        bool seize = (request == PTRACE_SEIZE);
        int retval;
 
-       /*
-        * SEIZE will enable new ptrace behaviors which will be implemented
-        * gradually.  SEIZE_DEVEL bit is used to prevent applications
-        * expecting full SEIZE behaviors trapping on kernel commits which
-        * are still in the process of implementing them.
-        *
-        * Only test programs for new ptrace behaviors being implemented
-        * should set SEIZE_DEVEL.  If unset, SEIZE will fail with -EIO.
-        *
-        * Once SEIZE behaviors are completely implemented, this flag
-        * will be removed.
-        */
        retval = -EIO;
        if (seize) {
                if (addr != 0)
                        goto out;
-               if (!(flags & PTRACE_SEIZE_DEVEL))
-                       goto out;
-               flags &= ~(unsigned long)PTRACE_SEIZE_DEVEL;
                if (flags & ~(unsigned long)PTRACE_O_MASK)
                        goto out;
                flags = PT_PTRACED | PT_SEIZED | (flags << PT_OPT_FLAG_SHIFT);