A faulty (never merged) kernel patch for ipset had a use-after-free where an element was free'd without unlinking it from the table, yet the faulty kernel passed all tests. Check that we don't free non-matching elements, the request to delete is for non-existing element, no free must happen and the command must fail. Signed-off-by: Florian Westphal --- tests/hash:net,iface.t | 5 +++++ 1 file changed, 5 insertions(+) diff --git a/tests/hash:net,iface.t b/tests/hash:net,iface.t index bcd0ba451c62..556d56df5c4b 100644 --- a/tests/hash:net,iface.t +++ b/tests/hash:net,iface.t @@ -228,6 +228,11 @@ 0 ipset -! a test 2.0.0.20/25,wlan0 timeout 700 # Counters and timeout: check counters 0 ./check_extensions test 2.0.0.0/25,wlan0 700 13 12479 +0 ipset flush test +0 ipset add test 10.0.1.0/24,eth0 +1 ( for i in $(seq 1 10000); do ipset del test 10.0.1.0/24,eth1 ; done ) +0 ipset t test 10.0.1.0/24,eth0 +0 ipset list # Counters and timeout: destroy set 0 ipset x test # eof -- 2.54.0