Date: Thu, 11 Nov 2004 18:09:20 -1000 From: Kip McAtee <kmcatee@firetide.com> To: freebsd-hackers@freebsd.org Cc: hsu@freebsd.org Subject: 5.3-BETA5 m_dup() question Message-ID: <200411111809.20550.kmcatee@firetide.com>
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Greetings-
I have a symptom where an mbuf is being allocated
and the (int *) ref_count is not a virtual address.
I have a few new instances of calls to m_dup() that might
be causing the problem downstream.
Could this be because the network is allocating from
a 'packet zone' and m_dup() is not?
#define EXT_PACKET 3 /* came out of Packet zone */
That is, given a multicast input packet like this:
mh_flags = 0x403
{MH_ext = {ext_buf = 0xc14c3000, ext_free = 0x0,
ext_args = 0x0, ext_size = 0x800, ref_cnt = 0xc14b5564,
ext_type = 0x3}
after a call to m_dup(), I have a canonical mbuf with
the MH_ext fields uninitialized.
Later mb_ctor_pack() is tripping over constructing a new packet
with a non-virtual address in ref_cnt.
Thanks-
Kip
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