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> fix vgpu-monitor panic due to cache file size incorrect #319

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> fix vgpu-monitor panic due to cache file size incorrect #319

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4 changes: 4 additions & 0 deletions cmd/vGPUmonitor/cudevshr.go
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Original file line number Diff line number Diff line change
Expand Up @@ -138,6 +138,10 @@ func mmapcachefile(filename string, nc *nvidiaCollector) error {
fmt.Println("openfile error=", err.Error())
return err
}
ss, _ := f.Stat()
if ss.Size() < int64(unsafe.Sizeof(*m)) {
return fmt.Errorf("cache file %s size %d is less than %d", filename, ss.Size(), unsafe.Sizeof(*m))
}
data, err := syscall.Mmap(int(f.Fd()), 0, int(unsafe.Sizeof(*m)), syscall.PROT_WRITE|syscall.PROT_READ, syscall.MAP_SHARED)
if err != nil {
return err
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