From: Harald Welte <laforge@gnumonks.org>
To: netdev@vger.kernel.org
Subject: Re: ip xfrm delete / deleteall not able to delete SAs with SPI=0
Date: Fri, 24 Dec 2021 10:16:05 +0100 [thread overview]
Message-ID: <YcWP1V7b4ZLhbcM7@nataraja> (raw)
In-Reply-To: <YcTyNRqYdBGoEYid@nataraja>
Hi again,
I did a bit more testing and the problem seems to occur with SPI=0,
i.e. the kernel permits a SA for SPI=0 to be created via netlink, but then
it somehow fails to allow that to be deleted again via netlink, and it will
be stuck until the user manually flushes all SAs.
To be fair, RFC4303 says "The SPI value of zero (0) is reserved for local,
implementation-specific use and MUST NOT be sent on the wire"
However, despite that, I think the kernel should ether
a) reject creation of any SA with SPI=0
b) if it accepts a SA with SPI=0 in NEWSA, it should equally accept
the symmetric DELSA operation with SP=0
--
- Harald Welte <laforge@gnumonks.org> http://laforge.gnumonks.org/
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"Privacy in residential applications is a desirable marketing option."
(ETSI EN 300 175-7 Ch. A6)
prev parent reply other threads:[~2021-12-24 9:20 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-12-23 22:03 ip xfrm delete / deleteall not able to delete SAs Harald Welte
2021-12-24 9:16 ` Harald Welte [this message]
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