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| author | Oleg Nesterov <oleg@redhat.com> | 2009-06-17 16:27:35 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2009-06-18 13:03:52 -0700 |
| commit | d92656633b8352c6d4b14afcb7beb154d76e7aa6 (patch) | |
| tree | 616dabaff973bc4483ece684c93afdb2dcacff59 /kernel/signal.c | |
| parent | d1e98f429aa10132b3010ba3b0be47552a2eb14b (diff) | |
| download | lwn-d92656633b8352c6d4b14afcb7beb154d76e7aa6.tar.gz lwn-d92656633b8352c6d4b14afcb7beb154d76e7aa6.zip | |
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/signal.c')
| -rw-r--r-- | kernel/signal.c | 2 |
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(); |