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Message-Id: <20240706231332.3261-1-hdanton@sina.com>
Date: Sun, 7 Jul 2024 07:13:32 +0800
From: Hillf Danton <hdanton@...a.com>
To: syzbot <syzbot+4fd66a69358fc15ae2ad@...kaller.appspotmail.com>
Cc: linux-kernel@...r.kernel.org,
syzkaller-bugs@...glegroups.com
Subject: Re: [syzbot] [netfilter?] KASAN: slab-use-after-free Read in nf_tables_trans_destroy_work
#syz test https://git.kernel.org/pub/scm/linux/kernel/git/netdev/net-next.git 1c5fc27bc48a
--- x/net/netfilter/nf_tables_api.c
+++ y/net/netfilter/nf_tables_api.c
@@ -11552,9 +11552,10 @@ static int nft_rcv_nl_event(struct notif
gc_seq = nft_gc_seq_begin(nft_net);
- if (!list_empty(&nf_tables_destroy_list))
- nf_tables_trans_destroy_flush_work();
+ nf_tables_trans_destroy_flush_work();
again:
+ WARN_ON(!list_empty(&nft_net->commit_list) || !list_empty(&nf_tables_destroy_list));
+
list_for_each_entry(table, &nft_net->tables, list) {
if (nft_table_has_owner(table) &&
n->portid == table->nlpid) {
--
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