Fail for disks which overflow upon usage calculation (#8056)

Fixes #8035

pkg/disk/stat_linux.go

@@ -19,6 +19,7 @@
 package disk
 
 import (
+	"fmt"
 	"syscall"
 )
 
@@ -37,5 +38,12 @@ func GetInfo(path string) (info Info, err error) {
 		Ffree:  uint64(s.Ffree),
 		FSType: getFSType(int64(s.Type)),
 	}
+	// Check for overflows.
+	// https://github.com/minio/minio/issues/8035
+	// XFS can show wrong values at times error out
+	// in such scenarios.
+	if info.Free > info.Total {
+		return info, fmt.Errorf("detected free space (%d) > total disk space (%d), fs corruption at (%s). please run 'fsck'", info.Free, info.Total, path)
+	}
 	return info, nil
 }