Messages in this thread Patch in this message | | | Date | Sat, 27 Dec 2008 12:55:11 -0800 | From | Sukadev Bhattiprolu <> | Subject | [PATCH 6/6][v5] SI_USER: Masquerade si_pid when crossing pid ns boundary |
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From: Sukadev Bhattiprolu <sukadev@linux.vnet.ibm.com> Date: Wed, 24 Dec 2008 14:14:18 -0800 Subject: [PATCH 6/6][v5] 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@linux.vnet.ibm.com> --- kernel/signal.c | 2 ++ 1 files changed, 2 insertions(+), 0 deletions(-)
diff --git a/kernel/signal.c b/kernel/signal.c index d90b033..7ffd044 100644 --- a/kernel/signal.c +++ b/kernel/signal.c @@ -951,6 +951,8 @@ 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
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