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Bug#447766: marked as done (Kernel panic when rebooting a xen DomU)

Your message dated Sat, 30 Aug 2008 07:52:21 +0000
with message-id <E1KZLFt-0005ty-Av@ries.debian.org>
and subject line Bug#410807: fixed in user-mode-linux 2.6.18-1um-2etch.22etch1
has caused the Debian Bug report #410807,
regarding Kernel panic when rebooting a xen DomU
to be marked as done.

This means that you claim that the problem has been dealt with.
If this is not the case it is now your responsibility to reopen the
Bug report if necessary, and/or fix the problem forthwith.

(NB: If you are a system administrator and have no idea what this
message is talking about, this may indicate a serious mail system
misconfiguration somewhere. Please contact owner@bugs.debian.org
immediately.)


-- 
410807: http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=410807
Debian Bug Tracking System
Contact owner@bugs.debian.org with problems
--- Begin Message --- 
Package: linux-image-2.6.18-5-xen-686
Version: 2.6.18.dfsg.1-13etch4

On a Dell 2950 server, I rebooted a Xen instance:
 xm reboot backup
then I remember checking the console for progress:
 xm console backup
and when the DomU rebooted (or shortly after, I can't remember), I got a
kernel panic (I got it through multiple "Message from syslogd@n8 at Tue
Oct 23 15:48:26 2007 ..." over my SSH connection):

n8 kernel: ------------[ cut here ]------------
n8 kernel: kernel BUG at drivers/xen/core/evtchn.c:481!
n8 kernel: invalid opcode: 0000 [#1]
n8 kernel: SMP
n8 kernel: CPU:    5
n8 kernel: EIP is at retrigger+0x1f/0x35
n8 kernel: eax: 00000000   ebx: 02080000   ecx: 00000026   edx: f55f6000
n8 kernel: esi: c0317860   edi: 0000011a   ebp: 00000000   esp: c039feb0
n8 kernel: ds: 007b   es: 007b   ss: 0069
n8 kernel: Process xenwatch (pid: 29, ti=c039e000 task=c0ead000
task.ti=c039e000)
n8 kernel: Stack: c013b201 c0317860 0000011a c0317888 c013af57 db38dec0
00000000 00000000
n8 kernel:        db38dec0 c02171c8 00000000 c02175a8 c0210737 00000010
00000000 0000020a
n8 kernel:        00000209 00000000 00000000 c0a8f475 c02e57a4 ee338000
00000000 00000002
n8 kernel: Call Trace:
n8 kernel: Code: ee 85 f6 75 96 58 5a 5b 5e 5f 5d c3 0f b7 0c 85 40 98
37 c0 8b 15 84 09 2d c0 85 c9 74 1d 0f a3 8a 80 08 00 00 19 c0 85 c0 75
08 <0f> 0b e1 01 92 0a 2b c0 f0 0f ab 8a 00 08 00 00 b8 01 00 00 00
n8 kernel: EIP: [<c020c222>] retrigger+0x1f/0x35 SS:ESP 0069:c039feb0

Attached is what I could get using the Remote Console Access (RAC). This
is a screen capture of tty1.

Also attached is the syslog around that time.


The server froze and I had to reboot it.

HTH,

-- 
Sylvain

PNG image

Oct 23 15:45:07 n8 snmpd[3047]: Connection from UDP: [212.99.96.245]:45629
Oct 23 15:45:08 n8 last message repeated 45 times
Oct 23 15:48:24 n8 kernel: br-xen: port 2(vif1.0) entering disabled state
Oct 23 15:48:24 n8 kernel: device vif1.0 left promiscuous mode
Oct 23 15:48:24 n8 kernel: audit(1193147304.991:4): dev=vif1.0 prom=0 old_prom=256 auid=4294967295
Oct 23 15:48:24 n8 kernel: br-xen: port 2(vif1.0) entering disabled state
Oct 23 15:48:25 n8 logger: /etc/xen/scripts/vif-bridge: offline XENBUS_PATH=backend/vif/1/0
Oct 23 15:48:25 n8 logger: /etc/xen/scripts/block: remove XENBUS_PATH=backend/vbd/1/2049
Oct 23 15:48:25 n8 logger: /etc/xen/scripts/vif-bridge: brctl delif br-xen vif1.0 failed
Oct 23 15:48:25 n8 logger: /etc/xen/scripts/vif-bridge: ifconfig vif1.0 down failed
Oct 23 15:48:25 n8 logger: /etc/xen/scripts/xen-hotplug-cleanup: XENBUS_PATH=backend/vbd/1/2049
Oct 23 15:48:25 n8 logger: /etc/xen/scripts/vif-bridge: Successful vif-bridge offline for vif1.0, bridge br-xen.
Oct 23 15:48:25 n8 logger: /etc/xen/scripts/vif-bridge: online XENBUS_PATH=backend/vif/2/0
Oct 23 15:48:25 n8 logger: /etc/xen/scripts/xen-hotplug-cleanup: XENBUS_PATH=backend/vif/1/0
Oct 23 15:48:25 n8 logger: /etc/xen/scripts/block: add XENBUS_PATH=backend/vbd/2/2049
Oct 23 15:48:25 n8 kernel: device vif2.0 entered promiscuous mode
Oct 23 15:48:25 n8 kernel: audit(1193147305.747:5): dev=vif2.0 prom=256 old_prom=0 auid=4294967295
Oct 23 15:48:25 n8 kernel: ADDRCONF(NETDEV_UP): vif2.0: link is not ready
Oct 23 15:48:25 n8 logger: /etc/xen/scripts/vif-bridge: Successful vif-bridge online for vif2.0, bridge br-xen.
Oct 23 15:48:25 n8 logger: /etc/xen/scripts/vif-bridge: Writing backend/vif/2/0/hotplug-status connected to xenstore.
Oct 23 15:48:25 n8 logger: /etc/xen/scripts/block: Writing backend/vbd/2/2049/physical-device fe:0 to xenstore.
Oct 23 15:48:25 n8 logger: /etc/xen/scripts/block: Writing backend/vbd/2/2049/hotplug-status connected to xenstore.
Oct 23 15:48:26 n8 kernel: ------------[ cut here ]------------
Oct 23 15:48:26 n8 kernel: kernel BUG at drivers/xen/core/evtchn.c:481!
Oct 23 15:48:26 n8 kernel: invalid opcode: 0000 [#1]
Oct 23 15:48:26 n8 kernel: SMP
Oct 23 15:48:26 n8 kernel: Modules linked in: xt_physdev iptable_filter ip_tables x_tables button ac battery ipv6 bridge sg sr_mod loop usb_storage 8250_pnp psmouse 8250 serial_core serio_raw rtc pcspkr shpchp pci_hotplug joydev evdev ext3 jbd mbcache usbhid dm_mirror dm_snapshot dm_mod ide_cd cdrom generic sd_mod piix ide_core ehci_hcd uhci_hcd usbcore bnx2 megaraid_sas scsi_mod thermal processor fan
Oct 23 15:48:26 n8 kernel: CPU:    5
Oct 23 15:48:26 n8 kernel: EIP:    0061:[<c020c222>]    Not tainted VLI
Oct 23 15:48:26 n8 kernel: EFLAGS: 00010046   (2.6.18-5-xen-686 #1)
Oct 23 15:48:26 n8 kernel: EIP is at retrigger+0x1f/0x35
Oct 23 15:48:26 n8 kernel: eax: 00000000   ebx: 02080000   ecx: 00000026   edx: f55f6000
Oct 23 15:48:26 n8 kernel: esi: c0317860   edi: 0000011a   ebp: 00000000   esp: c039feb0
Oct 23 15:48:26 n8 kernel: ds: 007b   es: 007b   ss: 0069
Oct 23 15:48:26 n8 kernel: Process xenwatch (pid: 29, ti=c039e000 task=c0ead000 task.ti=c039e000)
Oct 23 15:48:26 n8 kernel: Stack: c013b201 c0317860 0000011a c0317888 c013af57 db38dec0 00000000 00000000
Oct 23 15:48:26 n8 kernel:        db38dec0 c02171c8 00000000 c02175a8 c0210737 00000010 00000000 0000020a
Oct 23 15:48:26 n8 kernel:        00000209 00000000 00000000 c0a8f475 c02e57a4 ee338000 00000000 00000002
Oct 23 15:48:26 n8 kernel: Call Trace:
Oct 23 15:48:26 n8 kernel:  [<c013b201>] check_irq_resend+0x41/0x48
Oct 23 15:48:26 n8 kernel:  [<c013af57>] enable_irq+0x72/0x87
Oct 23 15:48:26 n8 kernel:  [<c02171c8>] __netif_up+0xb/0x13
Oct 23 15:48:26 n8 kernel:  [<c02175a8>] netif_map+0x247/0x26f
Oct 23 15:48:26 n8 kernel:  [<c0210737>] xs_talkv+0xe3/0x128
Oct 23 15:48:26 n8 kernel:  [<c0210a80>] xenbus_read+0x34/0x3b
Oct 23 15:48:26 n8 kernel:  [<c0210e42>] xenbus_scanf+0x18/0x4d
Oct 23 15:48:26 n8 kernel:  [<c0216c39>] frontend_changed+0x29f/0x4a8
Oct 23 15:48:26 n8 kernel:  [<c0211e20>] otherend_changed+0x74/0x79
Oct 23 15:48:26 n8 kernel:  [<c02105ba>] xenwatch_handle_callback+0x12/0x44
Oct 23 15:48:26 n8 kernel:  [<c0210fff>] xenwatch_thread+0x105/0x11b
Oct 23 15:48:26 n8 kernel:  [<c012b6f9>] autoremove_wake_function+0x0/0x2d
Oct 23 15:48:26 n8 kernel:  [<c0210efa>] xenwatch_thread+0x0/0x11b
Oct 23 15:48:26 n8 kernel:  [<c012b62d>] kthread+0xc0/0xeb
Oct 23 15:48:26 n8 kernel:  [<c012b56d>] kthread+0x0/0xeb
Oct 23 15:48:26 n8 kernel:  [<c010293d>] kernel_thread_helper+0x5/0xb
Oct 23 15:48:26 n8 kernel: Code: ee 85 f6 75 96 58 5a 5b 5e 5f 5d c3 0f b7 0c 85 40 98 37 c0 8b 15 84 09 2d c0 85 c9 74 1d 0f a3 8a 80 08 00 00 19 c0 85 c0 75 08 <0f> 0b e1 01 92 0a 2b c0 f0 0f ab 8a 00 08 00 00 b8 01 00 00 00
Oct 23 15:48:26 n8 kernel: EIP: [<c020c222>] retrigger+0x1f/0x35 SS:ESP 0069:c039feb0
Oct 23 15:57:06 n8 syslogd 1.4.1#18: restart.

--- End Message ---
--- Begin Message --- 
Source: user-mode-linux
Source-Version: 2.6.18-1um-2etch.22etch1

We believe that the bug you reported is fixed in the latest version of
user-mode-linux, which is due to be installed in the Debian FTP archive:

user-mode-linux_2.6.18-1um-2etch.22etch1.diff.gz
  to pool/main/u/user-mode-linux/user-mode-linux_2.6.18-1um-2etch.22etch1.diff.gz
user-mode-linux_2.6.18-1um-2etch.22etch1.dsc
  to pool/main/u/user-mode-linux/user-mode-linux_2.6.18-1um-2etch.22etch1.dsc
user-mode-linux_2.6.18-1um-2etch.22etch1_i386.deb
  to pool/main/u/user-mode-linux/user-mode-linux_2.6.18-1um-2etch.22etch1_i386.deb



A summary of the changes between this version and the previous one is
attached.

Thank you for reporting the bug, which will now be closed.  If you
have further comments please address them to 410807@bugs.debian.org,
and the maintainer will reopen the bug report if appropriate.

Debian distribution maintenance software
pp.
dann frazier <dannf@debian.org> (supplier of updated user-mode-linux package)

(This message was generated automatically at their request; if you
believe that there is a problem with it please contact the archive
administrators by mailing ftpmaster@debian.org)


-----BEGIN PGP SIGNED MESSAGE-----
Hash: SHA1

Format: 1.7
Date: Wed,  6 Aug 2008 00:40:06 -0600
Source: user-mode-linux
Binary: user-mode-linux
Architecture: source i386
Version: 2.6.18-1um-2etch.22etch1
Distribution: stable-security
Urgency: high
Maintainer: User Mode Linux Maintainers <pkg-uml-pkgs@lists.alioth.debian.org>
Changed-By: dann frazier <dannf@debian.org>
Description: 
 user-mode-linux - User-mode Linux (kernel)
Closes: 410807 479773
Changes: 
 user-mode-linux (2.6.18-1um-2etch.22etch1) stable-security; urgency=high
 .
   * Rebuild against linux-source-2.6.18_2.6.18.dfsg.1-22etch1:
     * bugfix/sctp-make-sure-n-sizeof-does-not-overflow.patch
       [SECURITY] Fix potential overflow condition in
       sctp_getsockopt_local_addrs_old
       See CVE-2008-2826
     * bugfix/esp-iv-in-linear-part-of-skb.patch
       [SECURITY] Avoid tripping BUG() in IPsec code when the first fragment
       of an ESP packet does not contain the entire ESP header and IV
       See CVE-2007-6282
     * bugfix/amd64-fix-zeroing-on-exception-in-copy_user.patch
       [SECURITY] [amd64] Fix potential information leak when a copy
       operation fails by properly zeroing out destination memory
       See CVE-2008-2729
     * bugfix/tty-fix-for-tty-operations-bugs.patch
       [SECURITY] Fix issues with tty operation handling in various drivers
       See CVE-2008-2812
     * bugfix/check-privileges-before-setting-mount-propagation.patch
       [SECURITY] Check CAP_SYS_ADMIN when changing mountpoint type
       See CVE-2008-2931
     * bugfix/x86-fix-copy_user.patch
       [SECURITY][amd64] Fix memory leak in the copy_user routine, see #490910.
       See CVE-2008-0598
   * Changes from 2.6.18.dfsg.1-22:
     * Merge in changes from 2.6.18.dfsg.1-18etch6
     * 3w-9xxx: Add 3ware 9690SA Backport (closes: #479773)
     * Backport http://xenbits.xensource.com/xen-unstable.hg?rev/914304b3a3da,
       fixing kernel BUG at drivers/xen/core/evtchn.c:481 (closes: #410807).
   * Changes from 2.6.18.dfsg.1-18etch6
     * bugfix/dccp-feature-length-check.patch
       [SECURITY] Validate feature length to avoid heap overflow
       See CVE-2008-2358
     * bugfix/asn1-ber-decoding-checks.patch
       [SECURITY] Validate lengths in ASN.1 decoding code to avoid
       heap overflow
       See CVE-2008-1673
Files: 
 5cb0d6498fdb81826ae87ed1505d3617 892 misc extra user-mode-linux_2.6.18-1um-2etch.22etch1.dsc
 03ca670996b8db498c46da96c6769b9a 17971 misc extra user-mode-linux_2.6.18-1um-2etch.22etch1.diff.gz
 4bad5f3d2a7179063d0a7e696def9402 25590314 misc extra user-mode-linux_2.6.18-1um-2etch.22etch1_i386.deb

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--- End Message ---
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