tests/shell: Skip netdev_chain_dev_addremove on tainted kernels

The test checks taint state to indicate success or failure. Since this
won't work if the kernel is already tainted at start, skip the test
instead of failing it.

Fixes: 02dbf86f39410 ("tests: shell: add a test case for netdev ruleset flush + parallel link down")
Signed-off-by: Phil Sutter <phil@nwl.cc>
Reviewed-by: Pablo Neira Ayuso <pablo@netfilter.org>

diff --git a/tests/shell/testcases/chains/netdev_chain_dev_addremove b/tests/shell/testcases/chains/netdev_chain_dev_addremove
index 14260d54b778ef1bdafc71029ec62acb6de3a8fe..6103e82b10603eae36a9ae11ce8e238f084d15db 100755 (executable)
--- a/tests/shell/testcases/chains/netdev_chain_dev_addremove
+++ b/tests/shell/testcases/chains/netdev_chain_dev_addremove
@@ -4,6 +4,12 @@
 
 set -e
 
+read taint < /proc/sys/kernel/tainted
+if [ "$taint" -ne 0 ]; then
+       echo "Kernel already tainted up front."
+       exit 77
+fi
+
 iface_cleanup() {
         ip link del d0 &>/dev/null || :
 }
@@ -26,10 +32,6 @@ EOF
 }
 
 for i in $(seq 1 500);do
-       read taint < /proc/sys/kernel/tainted
-       if [ "$taint" -ne 0 ]; then
-               exit 1
-       fi
        ip link add dummy0 type dummy
        load_rules
 
@@ -37,12 +39,11 @@ for i in $(seq 1 500);do
        $NFT flush ruleset &
        ip link del dummy0 &
        wait
-done
 
-read taint < /proc/sys/kernel/tainted
-
-if [ "$taint" -ne 0 ]; then
-       exit 1
-fi
+       read taint < /proc/sys/kernel/tainted
+       if [ "$taint" -ne 0 ]; then
+               exit 1
+       fi
+done
 
 exit 0