Red Hat Bugzilla – Bug 248834
kobject_add failed for brport, kernel BUG at net/core/net-sysfs.c
Last modified: 2007-11-30 17:12:10 EST
Description of problem: Upgraded to kernel-xen-2.6.20-2925.13.fc7 (from updates-testing) and tried to create a new Xen guest with virt-install. I got the following error message: kernel BUG at net/core/net-sysfs.c:429! invalid opcode: 0000 [1] SMP The full syslog is attached, but here's the interesting part: xen kernel: kobject_add failed for brport (-13) xen kernel: Call Trace: xen kernel: [<ffffffff8031dce6>] kobject_add+0x163/0x18e xen kernel: [<ffffffff8823a493>] :bridge:br_add_if+0x1d2/0x2d8 xen kernel: [<ffffffff8823ab7d>] :bridge:add_del_if+0x41/0x5e xen kernel: [<ffffffff8823b203>] :bridge:br_dev_ioctl+0x669/0x6a2 ( with some SELinux errors, see bug 245274 comment 13 ) MySQL was running on the server when I got that error message, and it continued running fine despite this error. However, I was no longer able to ssh into the server. I tried rebooting the server remotely with 'shutdown -r now', but for some unknown reason the server didn't shut down properly and I had to visit our server room to power cycle the server. The previous version (2.6.20-2925.11) didn't crash like this. This is on Dell Poweredge 2900, with two integrated NICs and a four port D-Link DFE-580TX, which is hidden from Domain0 with pciback.hide=(0c:04.0)(0c:05.0)(0c:06.0)(0c:07.0). Version-Release number of selected component (if applicable): bridge-utils-1.1-2 kernel-xen-2.6.20-2925.13.fc7 selinux-policy-targeted-2.6.4-28.fc7 selinux-policy-2.6.4-28.fc7 How reproducible: Haven't tried to reproduce the problem yet Steps to Reproduce: 1. boot with kernel-xen-2.6.20-2925.13 2. run virt-install to create a new guest image: [root@xen ~]# virt-install Would you like a fully virtualized guest (yes or no)? This will allow you to run unmodified operating systems. no What is the name of your virtual machine? gw How much RAM should be allocated (in megabytes)? 384 What would you like to use as the disk (path)? /var/lib/xen/images/gw Would you like to enable graphics support? (yes or no) no What is the install location? ftp://192.168.0.160/documents/fc7/x86_64/os/ 3. Crash! Actual results: Kernel crash Expected results: New Xen virtual machine created successfully
Created attachment 159574 [details] syslog with the kernel error messages
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I see this bug, too (using 2.6.20-2925.11.fc7xen on x86_64). I can reproduce this issue when doing 'xm create xenguest' which worked previously and stopped working immediately after updating to selinux-policy-2.6.4-28.fc7 and selinux-policy-targeted-2.6.4-28.fc7. Before the SElinux update there was an SElinux denial, immediately afterwards I got a "invalid opcode: 0000 [1] SMP" message on all consoles. Therefore I suspect an SElinux issue and think the component should be changed to selinux.
Created attachment 159998 [details] crash log Attached you find call trace messages from Linux.
selinux-policy-targeted-2.6.4-29.fc7 doesn't seem to exhibit this problem any more.
(In reply to comment #5) > selinux-policy-targeted-2.6.4-29.fc7 doesn't seem to exhibit this problem any more. Good. Should I close this bug?
selinux-policy-targeted-2.6.4-29.fc7 fixes the problem for me too so I think this bug can be closed. The only thing I noticed is that the changelog entry in the -29 rpm for the latest revision is empty.
Closing the bug. Changing component just to keep it recorded on the right component on bugzilla.