[PATCH] ptrace: make pid of child process available for PTRACE_EVENT_VFORK_DONE

When delivering PTRACE_EVENT_VFORK_DONE, provide pid of the child process
when tracer calls ptrace(PTRACE_GETEVENTMSG).  This is already
(accidentally) available when the tracer is tracing VFORK in addition to
VFORK_DONE.

Signed-off-by: Chuck Ebbert <76306.1226@compuserve.com>
Cc: Daniel Jacobowitz <dan@debian.org>
Cc: Albert Cahalan <acahalan@gmail.com>
Cc: Roland McGrath <roland@redhat.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

1 files changed, 3 insertions, 1 deletions

diff --git a/kernel/fork.c b/kernel/fork.c
index 1b0f7b1e0881..aa36c43783cc 100644
--- a/kernel/fork.c
+++ b/kernel/fork.c
@@ -1387,8 +1387,10 @@ long do_fork(unsigned long clone_flags,
 
                 if (clone_flags & CLONE_VFORK) {
                         wait_for_completion(&vfork);
-                        if (unlikely (current->ptrace & PT_TRACE_VFORK_DONE))
+                        if (unlikely (current->ptrace & PT_TRACE_VFORK_DONE)) {
+                                current->ptrace_message = nr;
                                 ptrace_notify ((PTRACE_EVENT_VFORK_DONE << 8) | SIGTRAP);
+                        }
                 }
         } else {
                 free_pid(pid);