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| author | Eric W. Biederman <ebiederm@xmission.com> | 2018-09-03 21:02:46 +0300 |
|---|---|---|
| committer | Eric W. Biederman <ebiederm@xmission.com> | 2018-09-11 22:19:00 +0300 |
| commit | 3597dfe01d12f570bc739da67f857fd222a3ea66 (patch) | |
| tree | 465cc2b9a6c266df70b5c3f3ab12a08521eb02dd /kernel/signal.c | |
| parent | 4a63c1ffd384ebdce40aac9c997dab68379137be (diff) | |
| download | linux-3597dfe01d12f570bc739da67f857fd222a3ea66.tar.xz | |
signal: Always deliver the kernel's SIGKILL and SIGSTOP to a pid namespace init
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>
Diffstat (limited to 'kernel/signal.c')
| -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 b33264bb2064..8081ab79e97d 100644 --- a/kernel/signal.c +++ b/kernel/signal.c @@ -1039,7 +1039,7 @@ 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 = (type != PIDTYPE_PID) ? &t->signal->shared_pending : &t->pending; |