This is a note to let you know that I've just added the patch titled
netfilter: nf_tables: release batch on table validation from abort path
to the 6.8-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
netfilter-nf_tables-release-batch-on-table-validation-from-abort-path.patch
and it can be found in the queue-6.8 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
>From a45e6889575c2067d3c0212b6bc1022891e65b91 Mon Sep 17 00:00:00 2001
From: Pablo Neira Ayuso <pablo@xxxxxxxxxxxxx>
Date: Thu, 28 Mar 2024 13:27:36 +0100
Subject: netfilter: nf_tables: release batch on table validation from abort path
From: Pablo Neira Ayuso <pablo@xxxxxxxxxxxxx>
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@xxxxxxxxxxxxxxx
Fixes: c0391b6ab810 ("netfilter: nf_tables: missing validation from the abort path")
Signed-off-by: Pablo Neira Ayuso <pablo@xxxxxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
net/netfilter/nf_tables_api.c | 15 ++++++++++-----
1 file changed, 10 insertions(+), 5 deletions(-)
--- a/net/netfilter/nf_tables_api.c
+++ b/net/netfilter/nf_tables_api.c
@@ -10451,10 +10451,11 @@ static int __nf_tables_abort(struct net
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) {
@@ -10647,7 +10648,7 @@ static int __nf_tables_abort(struct net
else
nf_tables_module_autoload_cleanup(net);
- return 0;
+ return err;
}
static int nf_tables_abort(struct net *net, struct sk_buff *skb,
@@ -10660,6 +10661,9 @@ static int nf_tables_abort(struct net *n
gc_seq = nft_gc_seq_begin(nft_net);
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;
@@ -11461,9 +11465,10 @@ static void __net_exit nf_tables_exit_ne
gc_seq = nft_gc_seq_begin(nft_net);
- if (!list_empty(&nft_net->commit_list) ||
- !list_empty(&nft_net->module_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);
Patches currently in stable-queue which might be from pablo@xxxxxxxxxxxxx are
queue-6.8/netfilter-nf_tables-release-batch-on-table-validation-from-abort-path.patch
queue-6.8/netfilter-nf_tables-release-mutex-after-nft_gc_seq_end-from-abort-path.patch
queue-6.8/netfilter-nf_tables-reject-destroy-command-to-remove.patch
queue-6.8/netfilter-nf_tables-skip-netdev-hook-unregistration-.patch
queue-6.8/netfilter-nf_tables-reject-table-flag-and-netdev-bas.patch
