From 6b23d2a08e71ce7d93b1d52e545f792f549225dc Mon Sep 17 00:00:00 2001 From: Jamie Liu Date: Wed, 23 Jun 2021 11:13:45 -0700 Subject: Fix PR_SET_PTRACER applicability to non-leader threads. Compare if (!thread_group_leader(tracee)) tracee = rcu_dereference(tracee->group_leader); in security/yama/yama_lsm.c:ptracer_exception_found(). PiperOrigin-RevId: 381074242 --- pkg/sentry/kernel/ptrace.go | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) (limited to 'pkg') diff --git a/pkg/sentry/kernel/ptrace.go b/pkg/sentry/kernel/ptrace.go index a6287fd6a..20563f02a 100644 --- a/pkg/sentry/kernel/ptrace.go +++ b/pkg/sentry/kernel/ptrace.go @@ -294,7 +294,7 @@ func (t *Task) isYAMADescendantOfLocked(ancestor *Task) bool { // Precondition: the TaskSet mutex must be locked (for reading or writing). func (t *Task) hasYAMAExceptionForLocked(tracer *Task) bool { - allowed, ok := t.k.ptraceExceptions[t] + allowed, ok := t.k.ptraceExceptions[t.tg.leader] if !ok { return false } -- cgit v1.2.3