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195893d381
Since commite9b9e4ace2has landed, there is a chance that container.RWLayer is nil (due to some half-removed container). Let's check the pointer before use to avoid any potential nil pointer dereferences, resulting in a daemon crash. Note that even without the abovementioned commit, it's better to perform an extra check (even it's totally redundant) rather than to have a possibility of a daemon crash. In other words, better be safe than sorry. [v2: add a test case for daemon.getInspectData] [v3: add a check for container.Dead and a special error for the case] Fixes:e9b9e4ace2Signed-off-by: Kir Kolyshkin <kolyshkin@gmail.com>
34 lines
841 B
Go
34 lines
841 B
Go
package daemon // import "github.com/docker/docker/daemon"
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import (
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"errors"
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"runtime"
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"time"
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"github.com/docker/docker/pkg/archive"
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)
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// ContainerChanges returns a list of container fs changes
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func (daemon *Daemon) ContainerChanges(name string) ([]archive.Change, error) {
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start := time.Now()
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container, err := daemon.GetContainer(name)
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if err != nil {
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return nil, err
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}
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if runtime.GOOS == "windows" && container.IsRunning() {
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return nil, errors.New("Windows does not support diff of a running container")
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}
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container.Lock()
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defer container.Unlock()
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if container.RWLayer == nil {
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return nil, errors.New("RWLayer of container " + name + " is unexpectedly nil")
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}
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c, err := container.RWLayer.Changes()
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if err != nil {
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return nil, err
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}
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containerActions.WithValues("changes").UpdateSince(start)
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return c, nil
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}
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