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Fix race condition in execCommandGC

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`daemon.execCommandGC`
The daemon object (grep execCommandGC) iterate over a map
(grep execCommands.Commands) in a goroutine.
Lock can't protect concurrency access in this case.
Exec command storage object should return a copy of commands instead.

Signed-off-by: Pei Su <sillyousu@gmail.com>
This commit is contained in:
Pei Su 2016-01-19 20:30:48 +08:00
parent cd1ed858d3
commit e5e62b96ce
1 changed files with 7 additions and 1 deletions
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8
daemon/exec/exec.go
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@ -53,7 +53,13 @@ func NewStore() *Store {
// Commands returns the exec configurations in the store.
func (e *Store) Commands() map[string]*Config {
return e.commands
e.RLock()
commands := make(map[string]*Config, len(e.commands))
for id, config := range e.commands {
commands[id] = config
}
e.RUnlock()
return commands
}
// Add adds a new exec configuration to the store.