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Index: lib/libnv/msgio.c
===================================================================
--- lib/libnv/msgio.c
+++ lib/libnv/msgio.c
@@ -63,7 +63,13 @@
/* Linux: arbitrary size, but must be lower than SCM_MAX_FD. */
#define PKG_MAX_SIZE ((64U - 1) * CMSG_SPACE(sizeof(int)))
#else
-#define PKG_MAX_SIZE ((MCLBYTES - CMSG_SPACE(0)) / sizeof(void *))
+/*
+ * Internalized rights occupy sizeof(void *) bytes of space.
+ * We need to use the same limit on 32-bit and 64-bit platforms
+ * so that 32-bit applications using libnv work properly when
+ * run on 64-bit kernels.
+ */
+#define PKG_MAX_SIZE ((MCLBYTES - CMSG_SPACE(0)) / 8)
#endif
static void

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