From: Sukadev Bhattiprolu <[email protected]>
Date: Fri, 12 Dec 2008 17:51:43 -0800
Subject: [PATCH] SEND_SIG_NOINFO: Masquerade si_pid when crossing pid-ns
boundary
For SEND_SIG_NOINFO, si_pid is currently set to the pid of sender
in sender's active pid namespace. But if the receiver is in a
different namespace, that given pid number would be incorrect.
Eg: when parent sends the 'pdeath_signal' to a child that is in
a descendant pid namespace, we should set si_pid 0.
Changelog[v2]
- Moved change from task_pid() to task_tgid() to separate patch
Signed-off-by: Sukadev Bhattiprolu <[email protected]>
---
kernel/signal.c | 3 ++-
1 files changed, 2 insertions(+), 1 deletions(-)
diff --git a/kernel/signal.c b/kernel/signal.c
index 2a64304..d11e5f8 100644
--- a/kernel/signal.c
+++ b/kernel/signal.c
@@ -856,7 +856,8 @@ static int send_signal(int sig, struct siginfo *info,
struct task_struct *t,
q->info.si_signo = sig;
q->info.si_errno = 0;
q->info.si_code = SI_USER;
- q->info.si_pid = task_pid_vnr(current);
+ q->info.si_pid = task_pid_nr_ns(current,
+ task_active_pid_ns(t));
q->info.si_uid = current_uid();
break;
case (unsigned long) SEND_SIG_PRIV:
--
1.5.2.5
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