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authorOleg Nesterov <oleg@redhat.com>2009-06-17 16:27:35 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2009-06-18 13:03:52 -0700
commitd92656633b8352c6d4b14afcb7beb154d76e7aa6 (patch)
tree616dabaff973bc4483ece684c93afdb2dcacff59 /kernel
parentd1e98f429aa10132b3010ba3b0be47552a2eb14b (diff)
downloadlinux-d92656633b8352c6d4b14afcb7beb154d76e7aa6.tar.bz2
ptrace: do_notify_parent_cldstop: fix the wrong ->nsproxy usage
If the non-traced sub-thread calls do_notify_parent_cldstop(), we send the notification to group_leader->real_parent and we report group_leader's pid. But, if group_leader is traced we use the wrong ->parent->nsproxy->pid_ns, the tracer and parent can live in different namespaces. Change the code to use "parent" instead of tsk->parent. Signed-off-by: Oleg Nesterov <oleg@redhat.com> Acked-by: Roland McGrath <roland@redhat.com> Acked-by: Sukadev Bhattiprolu <sukadev@linux.vnet.ibm.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'kernel')
-rw-r--r--kernel/signal.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/kernel/signal.c b/kernel/signal.c
index 09ccc1c0e1f8..ccf1ceedaebe 100644
--- a/kernel/signal.c
+++ b/kernel/signal.c
@@ -1499,7 +1499,7 @@ static void do_notify_parent_cldstop(struct task_struct *tsk, int why)
* see comment in do_notify_parent() abot the following 3 lines
*/
rcu_read_lock();
- info.si_pid = task_pid_nr_ns(tsk, tsk->parent->nsproxy->pid_ns);
+ info.si_pid = task_pid_nr_ns(tsk, parent->nsproxy->pid_ns);
info.si_uid = __task_cred(tsk)->uid;
rcu_read_unlock();