Re: Memory leak in 2.6.11-rc1?

From: Phil Oester (kernel_at_linuxace.com)
Date: 01/30/05

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    Date:	Sun, 30 Jan 2005 10:19:13 -0800
To: Patrick McHardy <kaber@trash.net>, "David S. Miller" <davem@davemloft.net>, Robert.Olsson@data.slu.se, akpm@osdl.org, torvalds@osdl.org, alexn@dsv.su.se, kas@fi.muni.cz, linux-kernel@vger.kernel.org, netdev@oss.sgi.com

    On Sun, Jan 30, 2005 at 06:01:46PM +0000, Russell King wrote:
    > > OTOH, if conntrack isn't loaded forwarded packet are never defragmented,
    > > so frag_list should be empty. So probably false alarm, sorry.
    >
    > I've just checked Phil's mails - both Phil and myself are using
    > netfilter on the troublesome boxen.
    >
    > Also, since FragCreates is zero, and this does mean that the frag_list
    > is not empty in all cases so far where ip_fragment() has been called.
    > (Reading the code, if frag_list was empty, we'd have to create some
    > fragments, which increments the FragCreates statistic.)

    The below testcase seems to illustrate the problem nicely -- ip_dst_cache
    grows but never shrinks:

    On gateway:

    iptables -I FORWARD -d 10.10.10.0/24 -j DROP

    On client:

    for i in `seq 1 254` ; do ping -s 1500 -c 5 -w 1 -f 10.10.10.$i ; done

    Phil
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