netdev - Re: ipv6 hitting route max

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Message-Id: <20110624.145758.1438445085852762505.davem@davemloft.net>
Date:	Fri, 24 Jun 2011 14:57:58 -0700 (PDT)
From:	David Miller <davem@...emloft.net>
To:	sim@...tway.ca
Cc:	netdev@...r.kernel.org, yoshfuji@...ux-ipv6.org
Subject: Re: ipv6 hitting route max_size

From: Simon Kirby <sim@...tway.ca>
Date: Wed, 8 Jun 2011 21:40:42 -0700

> Didn't apply to 2.6.39, so I tried 3.0-rc2, but I get an Oops when
> running the example reproduction case I gave before (
> 
> for ((i = 0;i < 4200;i++)); do ip route add unreachable 2000::$i; done
> 
> ) both with and without your patch applied:

I tried to reproduce this with Linus's current tree but I cannot.

Here is what I did:

-------------------- hex.c --------------------
#include <stdio.h>

int main(void)
{
	int i;

	for (i = 0; i < 0x4200; i++) {
		printf("%04x ", i);
	}
	printf("\n");
	return 0;
}
-------------------- hex.c --------------------
bash$ gcc -o hex hex.c
bash$ for i in $(./hex); do ip route add unreachable 2000::$i; done
bash$

It takes a bit of time to run, but no crash. :-)

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