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| author | Louis Peens <louis.peens@corigine.com> | 2021-07-02 11:21:38 +0200 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2021-07-02 13:36:35 -0700 |
| commit | 77ac5e40c44eb78333fbc38482d61fc2af7dda0a (patch) | |
| tree | a745b9fb6bc988d98bb0890a6c0754a2a68b4590 /net/sched/act_ct.c | |
| parent | a019abd8022061b917da767cd1a66ed823724eab (diff) | |
| download | linux-77ac5e40c44eb78333fbc38482d61fc2af7dda0a.tar.gz linux-77ac5e40c44eb78333fbc38482d61fc2af7dda0a.tar.bz2 linux-77ac5e40c44eb78333fbc38482d61fc2af7dda0a.zip | |
net/sched: act_ct: remove and free nf_table callbacks
When cleaning up the nf_table in tcf_ct_flow_table_cleanup_work
there is no guarantee that the callback list, added to by
nf_flow_table_offload_add_cb, is empty. This means that it is
possible that the flow_block_cb memory allocated will be lost.
Fix this by iterating the list and freeing the flow_block_cb entries
before freeing the nf_table entry (via freeing ct_ft).
Fixes: 978703f42549 ("netfilter: flowtable: Add API for registering to flow table events")
Signed-off-by: Louis Peens <louis.peens@corigine.com>
Signed-off-by: Yinjun Zhang <yinjun.zhang@corigine.com>
Signed-off-by: Simon Horman <simon.horman@corigine.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/sched/act_ct.c')
| -rw-r--r-- | net/sched/act_ct.c | 11 |
1 files changed, 11 insertions, 0 deletions
diff --git a/net/sched/act_ct.c b/net/sched/act_ct.c index a62f404d0e16..1b4b3514c94f 100644 --- a/net/sched/act_ct.c +++ b/net/sched/act_ct.c @@ -322,11 +322,22 @@ err_alloc: static void tcf_ct_flow_table_cleanup_work(struct work_struct *work) { + struct flow_block_cb *block_cb, *tmp_cb; struct tcf_ct_flow_table *ct_ft; + struct flow_block *block; ct_ft = container_of(to_rcu_work(work), struct tcf_ct_flow_table, rwork); nf_flow_table_free(&ct_ft->nf_ft); + + /* Remove any remaining callbacks before cleanup */ + block = &ct_ft->nf_ft.flow_block; + down_write(&ct_ft->nf_ft.flow_block_lock); + list_for_each_entry_safe(block_cb, tmp_cb, &block->cb_list, list) { + list_del(&block_cb->list); + flow_block_cb_free(block_cb); + } + up_write(&ct_ft->nf_ft.flow_block_lock); kfree(ct_ft); module_put(THIS_MODULE); |