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-rw-r--r--sys/src/9/port/sysproc.c2
1 files changed, 2 insertions, 0 deletions
diff --git a/sys/src/9/port/sysproc.c b/sys/src/9/port/sysproc.c
index 477d50fd5..8eed9814f 100644
--- a/sys/src/9/port/sysproc.c
+++ b/sys/src/9/port/sysproc.c
@@ -17,6 +17,8 @@ extern void checkpagerefs(void);
long
sysr1(ulong*)
{
+ if(!iseve())
+ error(Eperm);
checkpagerefs();
return 0;
}