Merge release-20200928.0-81-g6bbf66227 (automated)

1 files changed, 8 insertions, 4 deletions

diff --git a/pkg/sentry/syscalls/linux/sys_sysinfo.go b/pkg/sentry/syscalls/linux/sys_sysinfo.go
index 674d341b6..6320593f0 100644
--- a/pkg/sentry/syscalls/linux/sys_sysinfo.go
+++ b/pkg/sentry/syscalls/linux/sys_sysinfo.go
@@ -26,8 +26,12 @@ func Sysinfo(t *kernel.Task, args arch.SyscallArguments) (uintptr, *kernel.Sysca
 	addr := args[0].Pointer()
 
 	mf := t.Kernel().MemoryFile()
-	mf.UpdateUsage()
-	_, totalUsage := usage.MemoryAccounting.Copy()
+	mfUsage, err := mf.TotalUsage()
+	if err != nil {
+		return 0, nil, err
+	}
+	memStats, _ := usage.MemoryAccounting.Copy()
+	totalUsage := mfUsage + memStats.Mapped
 	totalSize := usage.TotalMemory(mf.TotalSize(), totalUsage)
 	memFree := totalSize - totalUsage
 	if memFree > totalSize {
@@ -37,12 +41,12 @@ func Sysinfo(t *kernel.Task, args arch.SyscallArguments) (uintptr, *kernel.Sysca
 
 	// Only a subset of the fields in sysinfo_t make sense to return.
 	si := linux.Sysinfo{
-		Procs:    uint16(len(t.PIDNamespace().Tasks())),
+		Procs:    uint16(t.Kernel().TaskSet().Root.NumTasks()),
 		Uptime:   t.Kernel().MonotonicClock().Now().Seconds(),
 		TotalRAM: totalSize,
 		FreeRAM:  memFree,
 		Unit:     1,
 	}
-	_, err := si.CopyOut(t, addr)
+	_, err = si.CopyOut(t, addr)
 	return 0, nil, err
 }