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Date:      Sat, 19 Aug 2023 02:07:02 +0000
From:      bugzilla-noreply@freebsd.org
To:        bugs@FreeBSD.org
Subject:   [Bug 273207] pf_syncookie_mac for IPv6 random cause panic
Message-ID:  <bug-273207-227-sOg8GYOELI@https.bugs.freebsd.org/bugzilla/>
In-Reply-To: <bug-273207-227@https.bugs.freebsd.org/bugzilla/>
References:  <bug-273207-227@https.bugs.freebsd.org/bugzilla/>

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https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=3D273207

--- Comment #16 from Rin Cat <dev@rincat.ch> ---
Not sure what's happened,=20

SipHash_Update(&ctx, pd->src, sizeof(pd->src->v6));

pd->src (struct pf_addr *) 0xfffff8010a3cae6e
become
(const uint8_t *) 0x0
in SipHash_Update

Before=20
        if (ctx->buflen > 0 || len < 8)
                len -=3D SipBuf(ctx, &s, len, 0);

And you cannot copy from NULL.

bcopy(*src, &ctx->buf.b8[ctx->buflen], x);

--=20
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