Bug 15042

Summary: socket(PF_INET6 hangs when ipv6 not yet initialized
Product: Networking Reporter: Rafael J. Wysocki (rjw)
Component: IPV6Assignee: Hideaki YOSHIFUJI (yoshfuji)
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?