diff options
| author | gystemd <gystemd@gmail.com> | 2021-08-17 22:57:39 +0200 |
|---|---|---|
| committer | gystemd <gystemd@gmail.com> | 2021-08-17 23:40:25 +0200 |
| commit | 482de52b60d9ac0bc40f264c82c8eb094401a119 (patch) | |
| tree | 74968e962129b1bbbcc30bf86eab88b6c98dbfaf | |
| parent | a5f2ef66d3c7e5ed1fd90cc8670b3e3891ad8af9 (diff) | |
Added a SIGTTOU block check in SetForegroundProcessGroup
| -rw-r--r-- | pkg/sentry/kernel/thread_group.go | 11 |
1 files changed, 7 insertions, 4 deletions
diff --git a/pkg/sentry/kernel/thread_group.go b/pkg/sentry/kernel/thread_group.go index c16b9eb37..0f741602d 100644 --- a/pkg/sentry/kernel/thread_group.go +++ b/pkg/sentry/kernel/thread_group.go @@ -511,10 +511,13 @@ func (tg *ThreadGroup) SetForegroundProcessGroup(tty *TTY, pgid ProcessGroupID) return -1, linuxerr.EPERM } - sa:= tg.signalHandlers.actions[linux.SIGTTOU] - //if the calling process is a member of a background group, a SIGTTOU - //signal is sent to all members of this background process group. - if tg.processGroup.id != tg.processGroup.session.foreground.id && sa.Handler!=linux.SIG_IGN{ + signalAction:= tg.signalHandlers.actions[linux.SIGTTOU] + // If the calling process is a member of a background group, a SIGTTOU + // signal is sent to all members of this background process group. + // We need also need to check whether it is ignoring or blocking SIGTTOU. + ignored:= signalAction.Handler == linux.SIG_IGN + blocked:= tg.leader.signalMask == linux.SignalSetOf(linux.SIGTTOU) + if tg.processGroup.id != tg.processGroup.session.foreground.id && !ignored && !blocked{ tg.leader.sendSignalLocked(SignalInfoPriv(linux.SIGTTOU),true) } |