diff options
| author | Pablo Neira Ayuso <pablo@netfilter.org> | 2024-04-08 23:20:40 +0200 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2024-04-13 12:59:54 +0200 |
| commit | 453c8da7ef6dc91c458c55e0da12c5cf75ea3026 (patch) | |
| tree | 8ef169f702319709af3db7c69de0de5365e7bc15 | |
| parent | 951838fee462aa01fa2a6a91d56f9a495082e7f0 (diff) | |
netfilter: nf_tables: release batch on table validation from abort path
commit a45e6889575c2067d3c0212b6bc1022891e65b91 upstream.
Unlike early commit path stage which triggers a call to abort, an
explicit release of the batch is required on abort, otherwise mutex is
released and commit_list remains in place.
Add WARN_ON_ONCE to ensure commit_list is empty from the abort path
before releasing the mutex.
After this patch, commit_list is always assumed to be empty before
grabbing the mutex, therefore
03c1f1ef1584 ("netfilter: Cleanup nft_net->module_list from nf_tables_exit_net()")
only needs to release the pending modules for registration.
Cc: stable@vger.kernel.org
Fixes: c0391b6ab810 ("netfilter: nf_tables: missing validation from the abort path")
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
| -rw-r--r-- | net/netfilter/nf_tables_api.c | 14 |
1 files changed, 10 insertions, 4 deletions
diff --git a/net/netfilter/nf_tables_api.c b/net/netfilter/nf_tables_api.c index dd440d7910a6..6c5de620da9f 100644 --- a/net/netfilter/nf_tables_api.c +++ b/net/netfilter/nf_tables_api.c @@ -8800,10 +8800,11 @@ static int __nf_tables_abort(struct net *net, enum nfnl_abort_action action) struct nft_trans *trans, *next; LIST_HEAD(set_update_list); struct nft_trans_elem *te; + int err = 0; if (action == NFNL_ABORT_VALIDATE && nf_tables_validate(net) < 0) - return -EAGAIN; + err = -EAGAIN; list_for_each_entry_safe_reverse(trans, next, &nft_net->commit_list, list) { @@ -8968,7 +8969,7 @@ static int __nf_tables_abort(struct net *net, enum nfnl_abort_action action) else nf_tables_module_autoload_cleanup(net); - return 0; + return err; } static int nf_tables_abort(struct net *net, struct sk_buff *skb, @@ -8982,6 +8983,8 @@ static int nf_tables_abort(struct net *net, struct sk_buff *skb, ret = __nf_tables_abort(net, action); nft_gc_seq_end(nft_net, gc_seq); + WARN_ON_ONCE(!list_empty(&nft_net->commit_list)); + mutex_unlock(&nft_net->commit_mutex); return ret; @@ -9716,8 +9719,11 @@ static void __net_exit nf_tables_exit_net(struct net *net) gc_seq = nft_gc_seq_begin(nft_net); - if (!list_empty(&nft_net->commit_list)) - __nf_tables_abort(net, NFNL_ABORT_NONE); + WARN_ON_ONCE(!list_empty(&nft_net->commit_list)); + + if (!list_empty(&nft_net->module_list)) + nf_tables_module_autoload_cleanup(net); + __nft_release_tables(net); nft_gc_seq_end(nft_net, gc_seq); |