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fix: potential crash in diskCache when fileScorer is empty (#13850)

Browse Source 
```
goroutine 115 [running]:
github.com/minio/minio/cmd.(*diskCache).purge.func3({0xc007a10a40, 0x40}, 0x40)
   github.com/minio/minio/cmd/disk-cache-backend.go:430 +0x90d
```
This commit is contained in:
Harshavardhana
2021-12-06 15:55:29 -08:00
committed by GitHub
parent 12b63061c2
commit 7d70afc937
2 changed files with 10 additions and 7 deletions
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3
cmd/disk-cache-utils.go
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@@ -419,6 +419,9 @@ func (f *fileScorer) addFileWithObjInfo(objInfo ObjectInfo, hits int) {
// Returns true if there still is a need to delete files (n+saveBytes >0),
// false if no more bytes needs to be saved.
func (f *fileScorer) adjustSaveBytes(n int64) bool {
if f == nil {
return false
}
if int64(f.saveBytes)+n <= 0 {
f.saveBytes = 0
f.trimQueue()