If some filters share the same action, when deleting these filters, it is possible to create a system panic. This is because deletions could be manipulated by many RCU callbacks at the same time.
This patch set fixes these issues. To reproduce the issue run selftests in patch 3 and 4. To test if the issue was fixed, apply patches 1 and 2 and then repeat the tests. v2 changelog ============ Revise the comment and add Acked-by: Jamal Hadi Salim <j...@mojatatu.com> Chris Mi (4): net/sched: Change tc_action refcnt and bindcnt to atomic net/sched: Use action array instead of action list as parameter selftests: Introduce a new script to generate tc batch file selftests: Introduce a new test case to tc testsuite include/net/act_api.h | 11 +- net/sched/act_api.c | 124 +++++++++++++-------- net/sched/act_bpf.c | 4 +- net/sched/act_connmark.c | 4 +- net/sched/act_csum.c | 4 +- net/sched/act_gact.c | 4 +- net/sched/act_ife.c | 4 +- net/sched/act_ipt.c | 4 +- net/sched/act_mirred.c | 4 +- net/sched/act_nat.c | 4 +- net/sched/act_pedit.c | 4 +- net/sched/act_police.c | 4 +- net/sched/act_sample.c | 4 +- net/sched/act_simple.c | 4 +- net/sched/act_skbedit.c | 4 +- net/sched/act_skbmod.c | 4 +- net/sched/act_tunnel_key.c | 4 +- net/sched/act_vlan.c | 4 +- net/sched/cls_api.c | 18 +-- .../tc-testing/tc-tests/filters/tests.json | 23 +++- tools/testing/selftests/tc-testing/tdc.py | 20 +++- tools/testing/selftests/tc-testing/tdc_batch.py | 62 +++++++++++ tools/testing/selftests/tc-testing/tdc_config.py | 2 + 23 files changed, 222 insertions(+), 102 deletions(-) create mode 100755 tools/testing/selftests/tc-testing/tdc_batch.py -- 1.8.3.1
