From: Florian Westphal <fw@strlen.de>
To: "Remy D. Farley" <one-d-wide@protonmail.com>
Cc: "netfilter-devel@vger.kernel.org" <netfilter-devel@vger.kernel.org>
Subject: Re: iptables: zero dereference parsing bitwise operations
Date: Sat, 11 Oct 2025 15:58:41 +0200 [thread overview]
Message-ID: <aOpigXfhOrj02Qa5@strlen.de> (raw)
In-Reply-To: <s5LZtLzqFmQhlD4mtmgcKbrgkfQ-X7k7vvg7s7XnXHekGJSKOMyOdmoiONo7MzuLVqYTFPntt74igf8Q0ERSPy5R9f8L1EfwrhOZbs_nhO8=@protonmail.com>
Remy D. Farley <one-d-wide@protonmail.com> wrote:
> While messing around with manually encoding nftables expressions, I noticed
> that iptables binary v1.8.11 segfaults with -L and -D <chain> options, if
> there's a rule containing a bitwise operation of a type other than
> mask-and-xor. As I understand, iptables and nft tools only generate rules with
> mask-xor, though the kernel seems to happily accept other types as well.
No, nftables supports this, but iptables does not.
iptables should not segfault, however. Care to make a patch?
Thanks.
next prev parent reply other threads:[~2025-10-11 14:04 UTC|newest]
Thread overview: 8+ messages / expand[flat|nested] mbox.gz Atom feed top
2025-10-10 21:16 iptables: zero dereference parsing bitwise operations Remy D. Farley
2025-10-11 13:58 ` Florian Westphal [this message]
2025-10-11 20:15 ` Remy D. Farley
2025-10-12 16:46 ` Florian Westphal
2025-10-13 9:04 ` Fernando Fernandez Mancera
2025-10-13 11:43 ` Remy D. Farley
2025-10-14 15:14 ` Fernando Fernandez Mancera
2025-10-14 15:29 ` Florian Westphal
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