[panic] swi4 page fault (ip_slowtimo())

Gleb Smirnoff glebius at FreeBSD.org
Mon Jun 24 10:21:58 UTC 2013

On Fri, Jun 21, 2013 at 08:17:12PM -0400, Glen Barber wrote:
G> Hi,
G> I have the following kgdb session from a page fault seemingly triggered
G> in pf(4).

pfslowtimo() isn't related to pf(4). "pf" stands here for "protocol family".

G> (kgdb) list *0xffffffff80772688
G> 0xffffffff80772688 is in ip_slowtimo (/usr/src/sys/netinet/ip_input.c:1242).
G> 1237				for(fp = TAILQ_FIRST(&V_ipq[i]); fp;) {
G> 1238					struct ipq *fpp;
G> 1239	
G> 1240					fpp = fp;
G> 1241					fp = TAILQ_NEXT(fp, ipq_list);
G> 1242					if(--fpp->ipq_ttl == 0) {
G> 1243						IPSTAT_ADD(ips_fragtimeout,
G> 1244						    fpp->ipq_nfrags);
G> 1245						ip_freef(&V_ipq[i], fpp);
G> 1246					}
G> (kgdb) p *ipq
G> $1 = {tqh_first = 0x0, tqh_last = 0xffffffff80e20e80}

Can you please "print ipq", so that we can look at entire array.

Totus tuus, Glebius.

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