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Merge pull request #32258 from yuwata/network-tc-fix-stack-overflow

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network/tc: fix stack overflow
This commit is contained in:
Luca Boccassi 2024-04-15 22:34:39 +02:00 committed by GitHub
commit a4328b284e
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3 changed files with 29 additions and 0 deletions
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6
src/network/tc/qdisc.c
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@ -293,14 +293,20 @@ QDisc* qdisc_drop(QDisc *qdisc) {
link = ASSERT_PTR(qdisc->link);
qdisc_mark(qdisc); /* To avoid stack overflow. */
/* also drop all child classes assigned to the qdisc. */
SET_FOREACH(tclass, link->tclasses) {
if (tclass_is_marked(tclass))
continue;
if (TC_H_MAJ(tclass->classid) != qdisc->handle)
continue;
tclass_drop(tclass);
}
qdisc_unmark(qdisc);
qdisc_enter_removed(qdisc);
if (qdisc->state == 0) {

6
src/network/tc/tclass.c
View File

@ -260,14 +260,20 @@ TClass* tclass_drop(TClass *tclass) {
link = ASSERT_PTR(tclass->link);
tclass_mark(tclass); /* To avoid stack overflow. */
/* Also drop all child qdiscs assigned to the class. */
SET_FOREACH(qdisc, link->qdiscs) {
if (qdisc_is_marked(qdisc))
continue;
if (qdisc->parent != tclass->classid)
continue;
qdisc_drop(qdisc);
}
tclass_unmark(tclass);
tclass_enter_removed(tclass);
if (tclass->state == 0) {

17
test/test-network/systemd-networkd-tests.py
View File

@ -4623,6 +4623,23 @@ class NetworkdTCTests(unittest.TestCase, Utilities):
print(output)
self.assertRegex(output, 'qdisc teql1 31: root')
@expectedFailureIfModuleIsNotAvailable('sch_fq', 'sch_sfq', 'sch_tbf')
def test_qdisc_drop(self):
copy_network_unit('12-dummy.netdev', '12-dummy.network')
start_networkd()
self.wait_online('dummy98:routable')
# Test case for issue #32247 and #32254.
for _ in range(20):
check_output('tc qdisc replace dev dummy98 root fq')
self.assertFalse(networkd_is_failed())
check_output('tc qdisc replace dev dummy98 root fq pacing')
self.assertFalse(networkd_is_failed())
check_output('tc qdisc replace dev dummy98 handle 10: root tbf rate 0.5mbit burst 5kb latency 70ms peakrate 1mbit minburst 1540')
self.assertFalse(networkd_is_failed())
check_output('tc qdisc add dev dummy98 parent 10:1 handle 100: sfq')
self.assertFalse(networkd_is_failed())
class NetworkdStateFileTests(unittest.TestCase, Utilities):
def setUp(self):