Date: Tue, 17 Jul 2012 01:40:04 +0400 From: Andrey Zonov <andrey@zonov.org> To: "freebsd-net@freebsd.org" <freebsd-net@freebsd.org> Subject: Re: panic: negative refcount 0xfffffe0007f1b4d4 Message-ID: <50048A34.10304@zonov.org> In-Reply-To: <5003EDC4.3050100@zonov.org> References: <5003EDC4.3050100@zonov.org>
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On 7/16/12 2:32 PM, Andrey Zonov wrote:
> Hi,
>
> I've got about 30 machines which panic sometimes in different places but
> with the same panic message: "negative refcount 0xfffffe0007f1b4d4".
> They are running under 9.0-STABLE@r234600M.
>
[snip]
>
> Is this known issue? If it is not, I've got textdumps and can send to
> anyone who wants to help me.
>
> Thanks in advance.
>
So, this is the one more ifa leak.
# kgdb
define print_ip
set $_cp = (unsigned char *)$arg0
printf "%d.%d.%d.%d", $_cp[0], $_cp[1], $_cp[2], $_cp[3]
end
define print_sin
set $_ip = &((struct sockaddr_in *)$arg0)->sin_addr
print_ip $_ip
end
define refcnt
set $ifp = ((struct ifnethead *) (vnet0->vnet_data_base +
(long)&vnet_entry_ifnet)).tqh_first
while ($ifp != 0)
set $ifa = $ifp->if_addrhead.tqh_first
while ($ifa != 0)
if ($ifa->ifa_addr->sa_family == 2)
printf "%s: inet", $ifp->if_xname
print_sin $ifa->ifa_addr
printf "\tcnt: %u \n", $ifa->ifa_refcnt
end
set $ifa = $ifa->ifa_link.tqe_next
end
set $ifp = $ifp->if_link.tqe_next
end
end
(kgdb) refcnt
em0: inet 77.88.6.34 cnt: 2746302764
lo0: inet 127.0.0.1 cnt: 28
(kgdb) refcnt
em0: inet 77.88.6.34 cnt: 2746321183
lo0: inet 127.0.0.1 cnt: 28
(kgdb) refcnt
em0: inet 77.88.6.34 cnt: 2746539500
lo0: inet 127.0.0.1 cnt: 28
Is there a method to detect such leaks?
--
Andrey Zonov
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