linux-kernel - Re: [syzbot] [netfilter?] WARNING: ODEBUG bug in hash_netiface4

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Date: Sat,  3 Feb 2024 13:08:28 +0800
From: Hillf Danton <hdanton@...a.com>
To: syzbot <syzbot+52bbc0ad036f6f0d4a25@...kaller.appspotmail.com>
Cc: linux-kernel@...r.kernel.org,
	syzkaller-bugs@...glegroups.com
Subject: Re: [syzbot] [netfilter?] WARNING: ODEBUG bug in hash_netiface4_destroy

On Fri, 02 Feb 2024 19:12:25 -0800
> syzbot has found a reproducer for the following issue on:
> 
> HEAD commit:    6897cea71837 Merge tag 'for-6.8/dm-fixes' of git://git.ker..
> git tree:       upstream
> C reproducer:   https://syzkaller.appspot.com/x/repro.c?x=16fcf5b0180000

#syz test https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git  master

--- x/net/netfilter/ipset/ip_set_hash_gen.h
+++ y/net/netfilter/ipset/ip_set_hash_gen.h
@@ -452,6 +452,7 @@ mtype_destroy(struct ip_set *set)
 	struct htype *h = set->data;
 	struct list_head *l, *lt;
 
+	cancel_delayed_work_sync(&h->gc.dwork);
 	mtype_ahash_destroy(set, ipset_dereference_nfnl(h->table), true);
 	list_for_each_safe(l, lt, &h->ad) {
 		list_del(l);
--