Re: BUG: dst underflow (again)

On Fri, 05 Nov 2004 02:05:41 -0500
Jeff Garzik [off-list ref] wrote:

David S. Miller wrote:

quoted

Jeff, could you similarly decode the ones that you seem to get?
That would be an incredibly useful datapoint.  If you've provided
this already, my bad and please point me at where you posted that.

I've compiled IPv6 into my router's kernel image, so next time I reboot, 
I should be able to get at symbol info out of the BUGs a bit more easily.

Thanks a lot.

quoted

But let me ask, do you have any IPSEC policies in the kernel
when these BUGs trigger?  If so, I'm pretty sure I know what
the problem may be.

I know this question wasn't directed at me, but, I do always compile 
ipsec stuff into my kernel, in addition to netfilter.  The relevant 
options are attached for the curious.

Yes, but do you actually install any IPSEC rules into your system?

The only way xfrm_lookup() can ever fall (and call that BUG'ing
dst_release() in udpv6_sendmsg()) is if you have at least some
IPSEC policies configured.