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Lock TaskSet mutex for writing in ptraceClone().

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This is necessary since ptraceClone() mutates tracer.ptraceTracees.

PiperOrigin-RevId: 365152396
This commit is contained in:
Jamie Liu
2021-03-25 16:50:06 -07:00
committed by gVisor bot
parent 6b085ba477
commit 79bc446fac
1 changed files with 2 additions and 2 deletions
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pkg/sentry/kernel/ptrace.go
+2 -2
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@@ -770,8 +770,8 @@ func (t *Task) ptraceClone(kind ptraceCloneKind, child *Task, opts *CloneOptions
if !t.hasTracer() {
return false
}
t.tg.pidns.owner.mu.RLock()
defer t.tg.pidns.owner.mu.RUnlock()
t.tg.pidns.owner.mu.Lock()
defer t.tg.pidns.owner.mu.Unlock()
event := false
if !opts.Untraced {
switch kind {