Bug 1418340

Summary: f25 host + rhel7.3 guest + guest 'noxsave' = guest panics on reboot
Product: [Fedora] Fedora Reporter: Adrian Reber <areber>
Component: qemuAssignee: Fedora Virtualization Maintainers <virt-maint>
Status: CLOSED EOL QA Contact: Fedora Extras Quality Assurance <extras-qa>
Severity: unspecified Docs Contact:
Priority: unspecified    
Version: 25CC: amit, areber, berrange, cfergeau, crobinso, dwmw2, itamar, pbonzini, rjones, rkrcmar, virt-maint
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Hardware: Unspecified   
OS: Unspecified   
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Last Closed: 2017-12-12 10:34:06 UTC Type: Bug
Regression: --- Mount Type: ---
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oVirt Team: --- RHEL 7.3 requirements from Atomic Host:
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Description Flags
VM crash png none

Description Adrian Reber 2017-02-01 15:25:57 UTC
Description of problem:
When adding 'noxsave' to the kernel command-line of the guest the guest crashes after a reboot with:

[    0.829867] traps: modprobe[44] trap invalid opcode ip:7f8a0e96adc2 sp:7ffd06cb59a0 error:0 in ld-2.17.so[7f8a0e954000+20000]
[    0.831753] traps: modprobe[46] trap invalid opcode ip:7fd03d4d8dc2 sp:7ffc350fc0c0 error:0 in ld-2.17.so[7fd03d4c2000+20000]
[    0.833643] Key type trusted registered
[    0.834416] traps: modprobe[50] trap invalid opcode ip:7f7594f35dc2 sp:7ffd80e51520 error:0 in ld-2.17.so[7f7594f1f000+20000]
[    0.836331] traps: modprobe[52] trap invalid opcode ip:7f2d10087dc2 sp:7ffeb579b3a0 error:0 in ld-2.17.so[7f2d10071000+20000]
[    0.838252] Key type encrypted registered
[    0.839056] traps: modprobe[56] trap invalid opcode ip:7f3af4d0fdc2 sp:7ffdb8b25da0 error:0 in ld-2.17.so[7f3af4cf9000+20000]
[    0.840955] traps: modprobe[58] trap invalid opcode ip:7f9195ef2dc2 sp:7ffe748ad760 error:0 in ld-2.17.so[7f9195edc000+20000]
[    0.842883] IMA: No TPM chip found, activating TPM-bypass!
[    0.844782] rtc_cmos 00:00: setting system clock to 2017-02-01 15:24:35 UTC (1485962675)
[    0.846789] Freeing unused kernel memory: 1684k freed
[    0.847826] traps: init[1] trap invalid opcode ip:7f5714322dc2 sp:7fff33a7c0f0 error:0 in ld-2.17.so[7f571430c000+20000]
[    0.849702] Kernel panic - not syncing: Attempted to kill init! exitcode=0x00000004
[    0.849702] 
[    0.851484] CPU: 0 PID: 1 Comm: init Not tainted 3.10.0-514.2.2.el7.x86_64 #1
[    0.852544] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.9.3-1.fc25 04/01/2014
[    0.853980]  ffffffff818c80f0 00000000d55fb31f ffff88003da37c60 ffffffff816860cc
[    0.855449]  ffff88003da37ce0 ffffffff8167f4d3 ffffffff00000010 ffff88003da37cf0
[    0.856921]  ffff88003da37c90 00000000d55fb31f ffffffff81e68080 0000000000000004
[    0.858391] Call Trace:
[    0.858928]  [<ffffffff816860cc>] dump_stack+0x19/0x1b
[    0.859719]  [<ffffffff8167f4d3>] panic+0xe3/0x1f2
[    0.860489]  [<ffffffff8108c48d>] do_exit+0xa3d/0xa40
[    0.861294]  [<ffffffff81099f63>] ? __sigqueue_free.part.11+0x33/0x40
[    0.862242]  [<ffffffff8108c50f>] do_group_exit+0x3f/0xa0
[    0.863115]  [<ffffffff8109d580>] get_signal_to_deliver+0x1d0/0x6d0
[    0.864082]  [<ffffffff8102a427>] do_signal+0x57/0x6c0
[    0.864923]  [<ffffffff8168e687>] ? do_trap+0xa7/0x170
[    0.865775]  [<ffffffff8102b144>] ? do_invalid_op+0xb4/0x130
[    0.866677]  [<ffffffff8102aaef>] do_notify_resume+0x5f/0xb0
[    0.867583]  [<ffffffff8168df7c>] retint_signal+0x48/0x8c



The guest is running RHEL 7.3 the host Fedora 25. The errors does not happen if I power off and power the VM back on again.

Something in the VM is different if rebooting or powering off and on again when using the 'noxsave' kernel option.

Version-Release number of selected component (if applicable):
# uname -a
Linux dcbz 4.9.3-200.fc25.x86_64 #1 SMP Fri Jan 13 01:01:13 UTC 2017 x86_64 x86_64 x86_64 GNU/Linux

qemu-kvm-2.7.1-2.fc25.x86_64
seabios-bin-1.9.3-1.fc25.noarch


How reproducible:
Always and on multiple VMs


Steps to Reproduce:
1. Add 'noxsave' to kernel command-line
2. reboot

Comment 1 Cole Robinson 2017-02-16 19:24:45 UTC
Did this work with previous fedora host versions, or any other host OS? Any help limiting this to host emulator, host kernel, or guest kernel.

Also CCing radim + paolo incase they have any ideas

Comment 2 Adrian Reber 2017-02-16 22:08:20 UTC
Sorry, I do not have many systems to test. I have a Fedora 24 system but the CPU is too old so that the XSAVE option is never passed from the host to the guest.

But I can reproduce the same error on a VPS I rented with CentOS. The VPS claims to be:


[    0.000000] DMI: OpenStack Foundation OpenStack Nova, BIOS Ubuntu-1.8.2-1ubuntu1~cloud0+ovh1 04/01/2014

I have no idea what exactly is running on the host, but it does not seem to be Fedora. I will attach a screenshot of the crash.

After power off/power on the crash is gone.

Comment 3 Adrian Reber 2017-02-16 22:09:23 UTC
Created attachment 1250970 [details]
VM crash png

Comment 4 Fedora End Of Life 2017-11-16 19:51:02 UTC
This message is a reminder that Fedora 25 is nearing its end of life.
Approximately 4 (four) weeks from now Fedora will stop maintaining
and issuing updates for Fedora 25. It is Fedora's policy to close all
bug reports from releases that are no longer maintained. At that time
this bug will be closed as EOL if it remains open with a Fedora  'version'
of '25'.

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version prior this bug is closed as described in the policy above.

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Comment 5 Fedora End Of Life 2017-12-12 10:34:06 UTC
Fedora 25 changed to end-of-life (EOL) status on 2017-12-12. Fedora 25 is
no longer maintained, which means that it will not receive any further
security or bug fix updates. As a result we are closing this bug.

If you can reproduce this bug against a currently maintained version of
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