UPSTREAM: 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.

Bug: 332996726
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: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
(cherry picked from commit b0b36dcbe0f24383612e5e62bd48df5a8107f7fc)
Signed-off-by: Lee Jones <joneslee@google.com>
Change-Id: I38f9b05ac4eadd1d2b7b306cccaf0aeacb61b57a