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fix: dns cache index out of range

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This commit is contained in:
gVisor bot 2023-01-11 09:53:56 +08:00
parent 259f900c3f
commit 79bd67a6c4
1 changed files with 5 additions and 3 deletions
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8
dns/util.go
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@ -29,9 +29,11 @@ const (
func putMsgToCache(c *cache.LruCache[string, *D.Msg], key string, msg *D.Msg) { func putMsgToCache(c *cache.LruCache[string, *D.Msg], key string, msg *D.Msg) {
// skip dns cache for acme challenge // skip dns cache for acme challenge
if q := msg.Question[0]; q.Qtype == D.TypeTXT && strings.HasPrefix(q.Name, "_acme-challenge") { if len(msg.Question) != 0 {
log.Debugln("[DNS] dns cache ignored because of acme challenge for: %s", q.Name) if q := msg.Question[0]; q.Qtype == D.TypeTXT && strings.HasPrefix(q.Name, "_acme-challenge") {
return log.Debugln("[DNS] dns cache ignored because of acme challenge for: %s", q.Name)
return
}
} }
var ttl uint32 var ttl uint32
switch { switch {