netdev - Re: [PATCH net] nftables: use list_for_each_entry_safe_reverse to traversal commit_list in nf_tables

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Message-ID: <CADvbK_fjSY3Z365=Bj5xcur-bXUqiXFqD_iPkxTJp_CJLZfZdg@mail.gmail.com>
Date:	Thu, 10 Dec 2015 00:19:09 +0800
From:	Xin Long <lucien.xin@...il.com>
To:	Pablo Neira Ayuso <pablo@...filter.org>
Cc:	network dev <netdev@...r.kernel.org>,
	netfilter-devel@...r.kernel.org, davem <davem@...emloft.net>,
	fw@...len.de
Subject: Re: [PATCH net] nftables: use list_for_each_entry_safe_reverse to
 traversal commit_list in nf_tables_abort

ok, the reproducer:
1.
#nft delete table foo
#nft add table foo
#nft list tables
#nft list table foo
#nft add chain foo bar
#nft add chain foo baz
#nft add chain foo bok
#nft list table foo

2. #nft -f panic.rules
------panic.rules-------
add rule foo bar ip saddr 127.0.0.1 accept
add rule foo bar ip saddr {192.168.1.2, 192.168.2.3} jump baz
add rule foo bar ip saddr {192.168.1.2, 192.168.2.3} jump bok

add rule foo baz ip saddr {192.168.1.2, 192.168.2.3} jump bok
add rule foo bok ip saddr {192.168.1.2, 192.168.2.3} jump baz

delete table foo
-------end-----------
the panic will happen 1/1
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