Bug 15042

Summary:	socket(PF_INET6 hangs when ipv6 not yet initialized
Product:	Networking	Reporter:	Rafael J. Wysocki (rjw)
Component:	IPV6	Assignee:	Hideaki YOSHIFUJI (yoshfuji)
Status:	CLOSED INSUFFICIENT_DATA
Severity:	normal	CC:	alan, florian, mh+kernel-bugzilla, nhorman
Priority:	P1
Hardware:	All
OS:	Linux
Kernel Version:	2.6.32.x	Subsystem:
Regression:	Yes	Bisected commit-id:
Bug Depends on:
Bug Blocks:	14230

Description Rafael J. Wysocki 2010-01-10 21:58:23 UTC

Subject    : 2.6.32.x socket(PF_INET6 hangs when ipv6 not yet initialized
Submitter  : Marc Haber <mh+linux-kernel@zugschlus.de>
Date       : 2010-01-10 14:28
References : http://marc.info/?l=linux-kernel&m=126313553029280&w=4

This entry is being used for tracking a regression from 2.6.31.  Please don't
close it until the problem is fixed in the mainline.

Comment 1 Neil Horman 2010-02-22 00:31:52 UTC

Can you get a sysrq-t dump of the system (or enable the nmi watchdog on  boot)? Theres a big comment about registering the inet6 protocol family half way through init, and it being dangerous (which it is), but its done so that other in-kernel protocols can create sockets (igmp/etc).  My guess is that its probably not related to socket creates specifically, but rather related to trying to send/receive data on the sockets prior to initalization completing.  either way, a stack trace would solve this quick, so liberal applcation of nmi_watchdog, or some other hangcheck utility would be great.

Comment 2 Marc Haber 2010-03-26 21:54:09 UTC

unfortunately, I have not yet found out how to create a dump of the system in virtualbox.

Comment 3 Florian Mickler 2011-02-02 09:23:41 UTC

Hello Marc,

is this still a problem with current (2.6.37.y) kernels?