From: Sukadev Bhattiprolu <sukadev@xxxxxxxxxxxxxxxxxx> Date: Wed, 24 Dec 2008 14:14:18 -0800 Subject: [PATCH 7/7][v6] SI_USER: Masquerade si_pid when crossing pid ns boundary When sending a signal to a descendant namespace, set ->si_pid to 0 since the sender does not have a pid in the receiver's namespace. Note: - If rt_sigqueueinfo() sets si_code to SI_USER when sending a signal across a pid namespace boundary, the value in ->si_pid will be cleared to 0. Changelog[v5]: - (Oleg Nesterov) Address both sys_kill() and sys_tkill() cases in send_signal() to simplify code (this drops patch 7/7 from earlier version of patchset). Signed-off-by: Sukadev Bhattiprolu <sukadev@xxxxxxxxxxxxxxxxxx> --- kernel/signal.c | 2 ++ 1 files changed, 2 insertions(+), 0 deletions(-) diff --git a/kernel/signal.c b/kernel/signal.c index 6ad47c0..d96ac1a 100644 --- a/kernel/signal.c +++ b/kernel/signal.c @@ -917,6 +917,8 @@ static int __send_signal(int sig, struct siginfo *info, struct task_struct *t, break; default: copy_siginfo(&q->info, info); + if (from_ancestor_ns) + q->info.si_pid = 0; break; } } else if (!is_si_special(info)) { -- 1.5.2.5 _______________________________________________ Containers mailing list Containers@xxxxxxxxxxxxxxxxxxxxxxxxxx https://lists.linux-foundation.org/mailman/listinfo/containers