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selftests: openvswitch: Add validation for the recursion test

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Add a test case into the netlink checks that will show the number of
nested action recursions won't exceed 16.  Going to 17 on a small
clone call isn't enough to exhaust the stack on (most) systems, so
it should be safe to run even on systems that don't have the fix
applied.

Signed-off-by: Aaron Conole <aconole@redhat.com>
Reviewed-by: Simon Horman <horms@kernel.org>
Link: https://lore.kernel.org/r/20240207132416.1488485-3-aconole@redhat.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
This commit is contained in:
Aaron Conole
2024-02-07 08:24:16 -05:00
committed by Jakub Kicinski
parent 6e2f90d31f
commit bd128f62c3
2 changed files with 69 additions and 15 deletions
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13
tools/testing/selftests/net/openvswitch/openvswitch.sh
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@@ -502,7 +502,20 @@ test_netlink_checks () {
wc -l) == 2 ] || \
return 1
info "Checking clone depth"
ERR_MSG="Flow actions may not be safe on all matching packets"
PRE_TEST=$(dmesg | grep -c "${ERR_MSG}")
ovs_add_flow "test_netlink_checks" nv0 \
'in_port(1),eth(),eth_type(0x800),ipv4()' \
'clone(clone(clone(clone(clone(clone(clone(clone(clone(clone(clone(clone(clone(clone(clone(clone(clone(drop)))))))))))))))))' \
>/dev/null 2>&1 && return 1
POST_TEST=$(dmesg | grep -c "${ERR_MSG}")
if [ "$PRE_TEST" == "$POST_TEST" ]; then
info "failed - clone depth too large"
return 1
fi
PRE_TEST=$(dmesg | grep -c "${ERR_MSG}")
ovs_add_flow "test_netlink_checks" nv0 \
'in_port(1),eth(),eth_type(0x0806),arp()' 'drop(0),2' \