From: Alok Kataria <akataria@vmware.com>
To: Tetsuo Handa <penguin-kernel@I-love.SAKURA.ne.jp>
Cc: "frederik.deweerdt@xprog.eu" <frederik.deweerdt@xprog.eu>,
"rjw@sisk.pl" <rjw@sisk.pl>,
"linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>,
"kernel-testers@vger.kernel.org" <kernel-testers@vger.kernel.org>,
Daniel Hecht <dhecht@vmware.com>
Subject: Re: [Bug #12409] NULL pointer dereference at get_stats()
Date: Wed, 11 Feb 2009 14:54:16 -0800 [thread overview]
Message-ID: <1234392856.25791.27.camel@alok-dev1> (raw)
In-Reply-To: <200902092019.CHE32301.JLFVFMtQSOOFHO@I-love.SAKURA.ne.jp>
Hi Tetsuo,
Thanks for reporting this. Yes i tried it here with a slightly
different .config and i did see the problem. I will try to figure out
what is happening over here, but before doing that let me ask if this
bug is only in the stable series ?
Do we know for which kernel does the "nolapic" option doesn't hit this
bug ?
Also, I assume its not present in 2.6.29-rc ?
Thanks,
Alok
On Mon, 2009-02-09 at 03:19 -0800, Tetsuo Handa wrote:
> Hello.
>
> > Bug-Entry : http://bugzilla.kernel.org/show_bug.cgi?id=12409
> > Subject : NULL pointer dereference at get_stats()
> > Submitter : Tetsuo Handa <penguin-kernel@i-love.sakura.ne.jp>
> > 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@xprog.eu>
>
> I made custom initramfs and tested on native environment and KVM and VMware.
> This problem happened only in VMware.
>
> Alok and Daniel (cc: added), can you reproduce this problem?
>
> Problem description:
>
> Compiling 2.6.28.4 using config at http://I-love.SAKURA.ne.jp/tmp/config-2.6.28-bug
> and booting with "nolapic" option on x86 machine with 2 CPUs, NULL pointer
> dereference happens at get_stats() because for_each_possible_cpu() reaches
> CPU 1 while "nolapic" option should prevent for_each_possible_cpu() from
> reaching CPU 1.
>
> Compiling 2.6.28.4 using config at http://I-love.SAKURA.ne.jp/tmp/config-2.6.28-nobug
> (all options in "Power management and ACPI options" section disabled)
> solves this problem.
>
> Also, this problem seems to be VMware specific.
> I couldn't reproduce this problem on native environment and KVM.
>
> Native environment (no problem):
>
> CentOS 5.2 (x86_64) and Ubuntu 8.04 (i386) on ThinkPad X60
>
> KVM environment (no problem):
>
> kvm -kernel /boot/vmlinuz-2.6.28.4 -initrd /boot/init -net none -hda /var/tmp/image.img -vnc xx.xx.xx.xx:0 --append "ro nolapic" -smp 2
> on Ubuntu 8.04 (i386) on ThinkPad X60
>
> VMware environment (problematic):
>
> Debian Sarge (i386) / CentOS 5.2 (i386) on VMware workstation 6.5.1 (x86_64)
> on CentOS 5.2 (x86_64) on ThinkPad X60
>
> Problematic kernel versions:
>
> 2.6.27.x and 2.6.28.x .
>
> Regards.
>
> ----- Custom initramfs -----
> /*
> gcc -Wall -O3 -static -o init init.c
> echo init | cpio -o -H newc | gzip -9 > /boot/init
> */
> #include <sys/mount.h>
> #include <sys/types.h>
> #include <sys/stat.h>
> #include <fcntl.h>
> #include <unistd.h>
> #include <stdio.h>
> #include <string.h>
>
> int main(int argc, char *argv[]) {
> FILE *fp;
> char buffer[1024];
> memset(buffer, 0, sizeof(buffer));
> mkdir("/proc", 0755);
> mount("none", "/proc", "proc", 0, NULL);
> fp = fopen("/proc/cpuinfo", "r");
> while (fgets(buffer, sizeof(buffer) - 1, fp))
> if (strstr(buffer, "processor"))
> printf("%s", buffer);
> fclose(fp);
> fp = fopen("/proc/cmdline", "r");
> fgets(buffer, sizeof(buffer) - 1, fp);
> fclose(fp);
> printf("%s", buffer);
> fflush(stdout);
> if (mkdir("/sys", 0755) || mount("/sys/", "/sys/", "sysfs", 0, NULL)) {
> printf("mount failed\n");
> while (1)
> sleep(1);
> }
> fp = fopen("/sys/class/net/lo/statistics/rx_packets", "r");
> if (!fp) {
> printf("open failed\n");
> while (1)
> sleep(1);
> }
> while (fgets(buffer, sizeof(buffer) - 1, fp))
> ;
> fclose(fp);
> printf("done\n");
> while (1)
> sleep(1);
> return 0;
> }
next prev parent reply other threads:[~2009-02-11 22:54 UTC|newest]
Thread overview: 103+ messages / expand[flat|nested] mbox.gz Atom feed top
2009-01-19 21:41 2.6.29-rc2-git1: Reported regressions 2.6.27 -> 2.6.28 Rafael J. Wysocki
2009-01-19 21:41 ` [Bug #11849] default IRQ affinity change in v2.6.27 (breaking several SMP PPC based systems) Rafael J. Wysocki
2009-01-19 21:45 ` [Bug #12061] snd_hda_intel: power_save: sound cracks on powerdown Rafael J. Wysocki
2009-01-19 21:45 ` [Bug #12208] uml is very slow on 2.6.28 host Rafael J. Wysocki
2009-01-26 11:35 ` Miklos Szeredi
2009-01-19 21:45 ` [Bug #12160] networking oops after resume from s2ram (2.6.28-rc6) Rafael J. Wysocki
2009-01-19 21:45 ` [Bug #12159] 2.6.28-rc6-git1 -- No sound produced from Intel HDA ALSA driver Rafael J. Wysocki
2009-01-19 21:45 ` [Bug #12263] Sata soft reset filling log Rafael J. Wysocki
2009-01-19 21:45 ` [Bug #12260] Regression due to commit 2b80848e3818fb1c (p54usb: support LM87 firmwares) Rafael J. Wysocki
2009-01-20 22:11 ` [PATCH -stable] p54usb: fix traffic stalls / packet drop Christian Lamparter
2009-01-20 22:36 ` Rafael J. Wysocki
2009-01-20 22:39 ` Greg KH
2009-01-20 23:56 ` John W. Linville
2009-01-21 14:03 ` Christian Lamparter
2009-01-19 21:45 ` [Bug #12224] journal activity on inactive partition causes inactive harddrive spinup Rafael J. Wysocki
2009-01-20 13:03 ` Theodore Tso
2009-01-19 21:45 ` [Bug #12209] oldish top core dumps (in its meminfo() function) Rafael J. Wysocki
2009-01-19 21:45 ` [Bug #12265] FPU emulation broken in 2.6.28-rc8 ? Rafael J. Wysocki
2009-01-19 21:45 ` [Bug #12264] i915: switching from kwin in opengl mode to a VT then back to x11, x11 freezes Rafael J. Wysocki
2009-01-20 18:13 ` Caleb Cushing
2009-01-19 21:45 ` [Bug #12337] ~100 extra wakeups reported by powertop Rafael J. Wysocki
2009-01-20 9:38 ` Alberto Gonzalez
2009-01-19 21:45 ` [Bug #12391] Processor does not go below C2 state until usb.autosuspend is enabled Rafael J. Wysocki
2009-01-27 10:27 ` Pavel Machek
2009-01-19 21:45 ` [Bug #12395] 2.6.28-rc9: oprofile regression Rafael J. Wysocki
2009-01-19 21:45 ` [Bug #12393] debugging in dosemu causes lots of 'scheduling while atomic' Rafael J. Wysocki
2009-01-20 9:58 ` Michal Suchanek
2009-01-19 21:45 ` [Bug #12396] hwinfo problem since 2.6.28 Rafael J. Wysocki
2009-01-26 14:00 ` Beschorner Daniel
2009-01-19 21:45 ` [Bug #12404] Oops in 2.6.28-rc9 and -rc8 -- mtrr issues / e1000e Rafael J. Wysocki
2009-01-19 21:45 ` [Bug #12403] TTY problem on linux-2.6.28-rc7 Rafael J. Wysocki
2009-01-19 21:45 ` [Bug #12401] 2.6.28 regression: xbacklight broken on ThinkPad X61s Rafael J. Wysocki
2009-01-20 7:30 ` Tino Keitel
2009-01-19 21:45 ` [Bug #12406] 2.6.28 thinks that my PS/2 mouse is a touchpad Rafael J. Wysocki
2009-01-20 1:45 ` Arjan Opmeer
2009-01-20 9:19 ` Dmitry Torokhov
2009-01-22 6:29 ` Alexander E. Patrakov
2009-01-19 21:45 ` [Bug #12407] Kernel 2.6.28 regression: Hang after hibernate Rafael J. Wysocki
2009-01-19 21:45 ` [Bug #12408] Funny problem with 2.6.28: Kernel stalls Rafael J. Wysocki
2009-01-19 21:45 ` [Bug #12405] oops in __bounce_end_io_read under kvm Rafael J. Wysocki
2009-01-19 21:45 ` [Bug #12409] NULL pointer dereference at get_stats() Rafael J. Wysocki
2009-01-21 16:18 ` Frederik Deweerdt
2009-01-24 0:39 ` Tetsuo Handa
2009-02-07 2:34 ` Tetsuo Handa
2009-02-09 11:19 ` Tetsuo Handa
2009-02-11 22:54 ` Alok Kataria [this message]
2009-02-11 23:02 ` Alok Kataria
2009-02-13 11:54 ` Tetsuo Handa
2009-01-19 21:45 ` [Bug #12465] KVM guests stalling on 2.6.28 (bisected) Rafael J. Wysocki
2009-01-20 0:12 ` Kevin Shanahan
2009-01-20 11:35 ` Ingo Molnar
2009-01-20 12:37 ` Avi Kivity
2009-01-20 12:42 ` Kevin Shanahan
2009-01-20 12:56 ` Ingo Molnar
2009-01-20 13:07 ` Ingo Molnar
2009-01-20 14:59 ` Steven Rostedt
2009-01-20 15:04 ` Ingo Molnar
2009-01-20 17:53 ` Steven Rostedt
2009-01-20 18:39 ` Ingo Molnar
2009-01-20 17:47 ` Avi Kivity
2009-01-21 14:25 ` Kevin Shanahan
2009-01-21 14:34 ` Avi Kivity
2009-01-21 14:51 ` Kevin Shanahan
2009-01-21 14:59 ` Avi Kivity
2009-01-21 15:13 ` Steven Rostedt
2009-01-22 1:48 ` Steven Rostedt
2009-01-21 15:10 ` Steven Rostedt
2009-01-21 15:18 ` Ingo Molnar
2009-01-22 19:57 ` Kevin Shanahan
2009-01-22 20:31 ` Ingo Molnar
2009-01-26 9:55 ` Kevin Shanahan
2009-01-26 11:35 ` Peter Zijlstra
2009-01-26 14:38 ` [RFC][PATCH] ftrace: function graph trace context switches Peter Zijlstra
2009-01-26 15:39 ` Frédéric Weisbecker
2009-01-26 15:41 ` Steven Rostedt
2009-03-16 17:57 ` Frederic Weisbecker
2009-01-26 15:00 ` [Bug #12465] KVM guests stalling on 2.6.28 (bisected) Ingo Molnar
2009-01-20 14:23 ` Kevin Shanahan
2009-01-20 14:25 ` Ingo Molnar
2009-01-20 15:51 ` Kevin Shanahan
2009-01-20 16:06 ` Ingo Molnar
2009-01-20 16:19 ` Peter Zijlstra
2009-01-20 14:46 ` Frédéric Weisbecker
2009-01-20 13:04 ` Avi Kivity
2009-01-20 17:54 ` Kevin Shanahan
2009-01-20 18:42 ` Ingo Molnar
2009-01-19 21:45 ` [Bug #12411] 2.6.28: BUG in r8169 Rafael J. Wysocki
2009-01-19 21:45 ` [Bug #12426] TMDC Joystick no longer works in kernel 2.6.28 Rafael J. Wysocki
2009-01-21 0:48 ` Andrew S. Johnson
2009-01-22 13:34 ` Jiri Kosina
2009-01-23 2:06 ` Andrew S. Johnson
2009-01-26 11:49 ` Jiri Kosina
2009-01-19 21:45 ` [Bug #12483] Reference to inexistent struct dmi_device_id breaks the build Rafael J. Wysocki
2009-01-20 8:15 ` Jean Delvare
2009-01-19 21:45 ` [Bug #12500] r8169: NETDEV WATCHDOG: eth0 (r8169): transmit timed out Rafael J. Wysocki
2009-01-22 16:43 ` 2.6.29-rc2-git1: Reported regressions 2.6.27 -> 2.6.28 Jörg-Volker Peetz
2009-01-24 13:25 ` Rolf Eike Beer
-- strict thread matches above, loose matches on Subject: below --
2009-02-23 22:00 2.6.29-rc6: " Rafael J. Wysocki
2009-02-23 22:03 ` [Bug #12409] NULL pointer dereference at get_stats() Rafael J. Wysocki
2009-02-24 3:54 ` Tetsuo Handa
2009-02-25 22:51 ` Rafael J. Wysocki
2009-02-14 20:48 2.6.29-rc5: Reported regressions 2.6.27 -> 2.6.28 Rafael J. Wysocki
2009-02-14 20:50 ` [Bug #12409] NULL pointer dereference at get_stats() Rafael J. Wysocki
2009-02-04 10:55 2.6.29-rc3-git6: Reported regressions 2.6.27 -> 2.6.28 Rafael J. Wysocki
2009-02-04 10:58 ` [Bug #12409] NULL pointer dereference at get_stats() Rafael J. Wysocki
[not found] <nn3SOLVZ28H.A.bY.CafaJB@chimera>
2009-01-11 11:41 ` Rafael J. Wysocki
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