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D3051.1794790392.diff
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Index: sys/geom/geom_dev.c
===================================================================
--- sys/geom/geom_dev.c
+++ sys/geom/geom_dev.c
@@ -358,6 +358,13 @@
#else
e = 0;
#endif
+
+ /*
+ * This happens on attempt to open a device node with O_EXEC.
+ */
+ if (r + w + e == 0)
+ return (EINVAL);
+
if (w) {
/*
* When running in very secure mode, do not allow

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