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Don't grab TaskSet mu recursively when reading task state.

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Reported-by: syzbot+a6ef0f95a2c9e7da26f3@syzkaller.appspotmail.com
Reported-by: syzbot+2eaf8a9f115edec468fe@syzkaller.appspotmail.com
PiperOrigin-RevId: 368093861
This commit is contained in:
Rahat Mahmood
2021-04-12 15:12:52 -07:00
committed by gVisor bot
parent 982fc8b576
commit f4f6ce337a
1 changed files with 2 additions and 2 deletions
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pkg/sentry/kernel/kernel.go
+2 -2
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@@ -1854,7 +1854,7 @@ func (k *Kernel) Release() {
func (k *Kernel) PopulateNewCgroupHierarchy(root Cgroup) {
k.tasks.mu.RLock()
k.tasks.forEachTaskLocked(func(t *Task) {
if t.ExitState() != TaskExitNone {
if t.exitState != TaskExitNone {
return
}
t.mu.Lock()
@@ -1870,7 +1870,7 @@ func (k *Kernel) PopulateNewCgroupHierarchy(root Cgroup) {
func (k *Kernel) ReleaseCgroupHierarchy(hid uint32) {
k.tasks.mu.RLock()
k.tasks.forEachTaskLocked(func(t *Task) {
if t.ExitState() != TaskExitNone {
if t.exitState != TaskExitNone {
return
}
t.mu.Lock()