diff options
| author | Eric W. Biederman <ebiederm@xmission.com> | 2018-09-03 20:02:46 +0200 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2018-11-13 11:12:34 -0800 |
| commit | 2dc063e47362208f4b8386ae610dbacb0fcd60a3 (patch) | |
| tree | 6e300705a8812584dfe0d4488188545c23f83b62 /kernel | |
| parent | 6d5b9f9d3ec392b6e7c9aaa4c3b172ba3a19634e (diff) | |
signal: Always deliver the kernel's SIGKILL and SIGSTOP to a pid namespace init
[ Upstream commit 3597dfe01d12f570bc739da67f857fd222a3ea66 ]
Instead of playing whack-a-mole and changing SEND_SIG_PRIV to
SEND_SIG_FORCED throughout the kernel to ensure a pid namespace init
gets signals sent by the kernel, stop allowing a pid namespace init to
ignore SIGKILL or SIGSTOP sent by the kernel. A pid namespace init is
only supposed to be able to ignore signals sent from itself and
children with SIG_DFL.
Fixes: 921cf9f63089 ("signals: protect cinit from unblocked SIG_DFL signals")
Reviewed-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: "Eric W. Biederman" <ebiederm@xmission.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'kernel')
| -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 41a5dd2df27d..1628b67992d6 100644 --- a/kernel/signal.c +++ b/kernel/signal.c @@ -1009,7 +1009,7 @@ static int __send_signal(int sig, struct siginfo *info, struct task_struct *t, result = TRACE_SIGNAL_IGNORED; if (!prepare_signal(sig, t, - from_ancestor_ns || (info == SEND_SIG_FORCED))) + from_ancestor_ns || (info == SEND_SIG_PRIV) || (info == SEND_SIG_FORCED))) goto ret; pending = group ? &t->signal->shared_pending : &t->pending; |