[PATCH 4.19 101/115] selftests: rtnetlink: add addresses with fixed life time

Greg Kroah-Hartman
2020-01-07T21:07:51Z

From: Florian Westphal <fw@strlen.de>

[ Upstream commit 3cfa148826e3c666da1cc2a43fbe8689e2650636 ]

This exercises kernel code path that deal with addresses that have
a limited lifetime.

Without previous fix, this triggers following crash on net-next:
BUG: KASAN: null-ptr-deref in check_lifetime+0x403/0x670
Read of size 8 at addr 0000000000000010 by task kworker [..]

Signed-off-by: Florian Westphal <fw@strlen.de>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
tools/testing/selftests/net/rtnetlink.sh | 21 +++++++++++++++++++++
1 file changed, 21 insertions(+)

diff --git a/tools/testing/selftests/net/rtnetlink.sh b/tools/testing/selftests/net/rtnetlink.sh
index e101af52d1d6..ff665de788ef 100755
--- a/tools/testing/selftests/net/rtnetlink.sh
+++ b/tools/testing/selftests/net/rtnetlink.sh
@@ -234,6 +234,26 @@ kci_test_route_get()
echo "PASS: route get"
}

+kci_test_addrlft()
+{
+ for i in $(seq 10 100) ;do
+ lft=$(((RANDOM%3) + 1))
+ ip addr add 10.23.11.$i/32 dev "$devdummy" preferred_lft $lft valid_lft $((lft+1))
+ check_err $?
+ done
+
+ sleep 5
+
+ ip addr show dev "$devdummy" | grep "10.23.11."
+ if [ $? -eq 0 ]; then
+ echo "FAIL: preferred_lft addresses remaining"
+ check_err 1
+ return
+ fi
+
+ echo "PASS: preferred_lft addresses have expired"
+}
+
kci_test_addrlabel()
{
ret=0
@@ -965,6 +985,7 @@ kci_test_rtnl()

kci_test_polrouting
kci_test_route_get
+ kci_test_addrlft
kci_test_tc
kci_test_gre
kci_test_gretap
--
2.20.1