diff --git a/net/test/net_test.sh b/net/test/net_test.sh
index e2ed6b1..0c3a3ad 100755
--- a/net/test/net_test.sh
+++ b/net/test/net_test.sh
@@ -1,4 +1,21 @@
 #!/bin/bash
+if [[ -n "${entropy}" ]]; then
+  echo "adding entropy from hex string [${entropy}]" 1>&2
+
+  # In kernel/include/uapi/linux/random.h RNDADDENTROPY is defined as
+  # _IOW('R', 0x03, int[2]) =(R is 0x52)= 0x40085203 = 1074287107
+  python 3>/dev/random <<EOF
+import fcntl, struct
+rnd = '${entropy}'.decode('hex')
+fcntl.ioctl(3, 0x40085203, struct.pack('ii', len(rnd) * 8, len(rnd)) + rnd)
+EOF
+
+  # This is probably not truly required, but let us give the system
+  # just a moment to catch up.  Mostly this just makes sure that
+  # the 'random: crng init done' kernel message has a chance to print
+  # out before we continue...
+  sleep 0.2
+fi
 
 # In case IPv6 is compiled as a module.
 [ -f /proc/net/if_inet6 ] || insmod $DIR/kernel/net-next/net/ipv6/ipv6.ko
diff --git a/net/test/run_net_test.sh b/net/test/run_net_test.sh
index 4c089f9..1b5c9f6 100755
--- a/net/test/run_net_test.sh
+++ b/net/test/run_net_test.sh
@@ -273,6 +273,17 @@
   # Use UML's /proc/exitcode feature to communicate errors on test failure
   cmdline="$cmdline net_test_exitcode=/proc/exitcode"
 
+  # Experience shows we need at least 128 bits of entropy for the kernel's
+  # crng init to complete, hence net_test.sh needs at least 32 hex chars
+  # (which is the amount of hex in a single random UUID) provided to it on
+  # the kernel cmdline.
+  #
+  # We'll pass in 256 bits just to be safe, ie. a random 64 hex char seed.
+  # We do this by getting *two* random UUIDs and concatenating their hex
+  # digits into an even length hex encoded string.
+  entropy="$(cat /proc/sys/kernel/random{/,/}uuid | tr -d '\n-')"
+  cmdline="${cmdline} entropy=${entropy}"
+
   # Map the --readonly flag to UML block device names
   if ((nowrite == 0)); then
     blockdevice=ubda