The patch titled
SEND_SIG_NOINFO: masquerade si_pid when crossing pid-ns boundary
has been added to the -mm tree. Its filename is
send_sig_noinfo-masquerade-si_pid-when-crossing-pid-ns-boundary.patch
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------------------------------------------------------
Subject: SEND_SIG_NOINFO: masquerade si_pid when crossing pid-ns boundary
From: Sukadev Bhattiprolu <sukadev@xxxxxxxxxxxxxxxxxx>
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
Eg: when parent sends the 'pdeath_signal' to a child that is in
a descendant pid namespace, we should set si_pid 0.
Signed-off-by: Sukadev Bhattiprolu <sukadev@xxxxxxxxxxxxxxxxxx>
Acked-By: Roland McGrath <roland@xxxxxxxxxx>
Cc: "Eric W. Biederman" <ebiederm@xxxxxxxxxxxx>
Cc: Oleg Nesterov <oleg@xxxxxxxxxx>
Cc: Pavel Emelyanov <xemul@xxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
kernel/signal.c | 3 ++-
1 file changed, 2 insertions(+), 1 deletion(-)
diff -puN kernel/signal.c~send_sig_noinfo-masquerade-si_pid-when-crossing-pid-ns-boundary kernel/signal.c
--- a/kernel/signal.c~send_sig_noinfo-masquerade-si_pid-when-crossing-pid-ns-boundary
+++ a/kernel/signal.c
@@ -858,7 +858,8 @@ static int send_signal(int sig, struct s
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:
_
Patches currently in -mm which might be from sukadev@xxxxxxxxxxxxxxxxxx are
linux-next.patch
send_sig_noinfo-masquerade-si_pid-when-crossing-pid-ns-boundary.patch
send_sig_noinfo-set-si_pid-to-tgid-instead-of-pid.patch
pid-implement-ns_of_pid.patch
pid-implement-ns_of_pid-update.patch
pid-generalize-task_active_pid_ns.patch
mqueue-fix-si_pid-value-in-mqueue-do_notify.patch
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