Hello. On Mon, Jan 19, 2009 at 10:45:43PM +0100, Rafael J. Wysocki wrote: > This message has been generated automatically as a part of a report > of regressions introduced between 2.6.27 and 2.6.28. > > The following bug entry is on the current list of known regressions > introduced between 2.6.27 and 2.6.28. Please verify if it still should > be listed and let me know (either way). > > > Bug-Entry : http://bugzilla.kernel.org/show_bug.cgi?id=12409 > Subject : NULL pointer dereference at get_stats() > Submitter : Tetsuo Handa <penguin-kernel@xxxxxxxxxxxxxxxxxxx> > Date : 2008-12-30 12:53 (21 days old) > References : http://marc.info/?l=linux-kernel&m=123064167008695&w=4 > Handled-By : Frederik Deweerdt <frederik.deweerdt@xxxxxxxx> This bug happens when "nolapic" option is given. This bug exists in 2.6.27.15 and 2.6.28.4 . This bug does not exist in 2.6.26.8 and 2.6.29-rc3-git10 . How to reproduce: (1) Prepare x86 machine with 2 cpus. (2) Add "nolapic" and "init=/bin/sh" options at the kernel command line. (3) Do "cat /sys/class/net/lo/statistics/rx_packets". If you apply a patch at http://lkml.org/lkml/2009/1/5/557 , you will notice "lb_stats == NULL for CPU 1" message. I think "nolapic" option causes for_each_possible_cpu() to reach CPU 1 by some error. Frederik Deweerdt wrote: > Hello Rafael, > > Not sure what the status should be for that one, it sure seems vmware > related, and I don't have one handy. > > Regards, > Frederik I think this bug will happen in native environment too. http://lkml.org/lkml/2009/1/4/349 But due to driver initialization failure caused by "nolapic" option, I can't reach /sbin/init on native ThinkPad X60 environment. Regards. -- To unsubscribe from this list: send the line "unsubscribe kernel-testers" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
