Red Hat Bugzilla – Full Text Bug Listing
|Summary:||KVM crashes inside SeaBIOS when attempting to boot MS-DOS|
|Product:||[Fedora] Fedora||Reporter:||H. Peter Anvin <hpa>|
|Component:||seabios||Assignee:||Justin M. Forbes <jforbes>|
|Status:||CLOSED WONTFIX||QA Contact:||Fedora Extras Quality Assurance <extras-qa>|
|Version:||13||CC:||berrange, clalance, ehabkost, extras-orphan, gleb, jforbes, markmc, notting, quintela, virt-maint|
|Fixed In Version:||Doc Type:||Bug Fix|
|Doc Text:||Story Points:||---|
|:||622350 (view as bug list)||Environment:|
|Last Closed:||2011-06-29 09:15:01 EDT||Type:||---|
|oVirt Team:||---||RHEL 7.3 requirements from Atomic Host:|
Description H. Peter Anvin 2010-07-19 21:06:33 EDT
Description of problem: KVM crashes when booting an MS-DOS 6.22 guest on an Intel host. This happens inside SeaBIOS; apparently SeaBIOS puts the hardware in a state KVM can't handle. Version-Release number of selected component (if applicable): qemu-system-x86-0.12.3-8.fc13.x86_64 How reproducible: Every time Steps to Reproduce: 1. Create an MS-DOS 6.22 boot disk 2. Boot it. Actual results: kvm: unhandled exit 80000021 kvm_run returned -22 "info registers" in the Qemu console shows that the error happens inside SeaBIOS, immediately after a return to real mode. Expected results: MS-DOS booting. Additional info: Happens with both hard disk and floppy disk images. No config.sys or autoexec.bat needed in the guest. CPU information (x4 cores x2 threads): vendor_id : GenuineIntel cpu family : 6 model : 26 model name : Intel(R) Core(TM) i7 CPU 940 @ 2.93GHz stepping : 4 cpu MHz : 1600.000 cache size : 8192 KB physical id : 0 siblings : 8 core id : 0 cpu cores : 4 apicid : 0 initial apicid : 0 fpu : yes fpu_exception : yes cpuid level : 11 wp : yes flags : fpu vme de pse tsc msr pae mce cx8 apic mtrr pge mca cmov pat pse36 clflush dts acpi mmx fxsr sse sse2 ss ht tm pbe syscall nx rdtscp lm constant_tsc arch_perfmon pebs bts rep_good xtopology nonstop_tsc aperfmperf pni dtes64 monitor ds_cpl vmx est tm2 ssse3 cx16 xtpr pdcm sse4_1 sse4_2 popcnt lahf_lm ida tpr_shadow vnmi flexpriority ept vpid bogomips : 5853.09 clflush size : 64 cache_alignment : 64 address sizes : 36 bits physical, 48 bits virtual power management:
Comment 1 H. Peter Anvin 2010-07-26 19:08:27 EDT
Note: "Plain" Qemu handles the same thing fine.
Comment 2 H. Peter Anvin 2010-07-30 21:21:18 EDT
(qemu) info registers EAX=00000010 EBX=00000008 ECX=e0100000 EDX=00000508 ESI=00000020 EDI=e0100020 EBP=00000008 ESP=000004d4 EIP=0000f4a7 EFL=00000002 [-------] CPL=3 II=0 A20=1 SMM=0 HLT=0 ES =0000 00000000 0000ffff 0000f300 CS =f000 000f0000 0000ffff 0000f300 SS =8e01 0008e010 0000ffff 0000f300 DS =8ec9 0008ec96 0000ffff 0000f300 FS =0000 00000000 0000ffff 0000f300 GS =0000 00000000 0000ffff 0000f300 LDT=0000 00000000 0000ffff 00008200 TR =0000 feffd000 00002088 00008b00 GDT= 0008ec66 0000002f IDT= 000f8560 00000000 CR0=00000010 CR2=00000000 CR3=00000000 CR4=00000000 DR0=00000000 DR1=00000000 DR2=00000000 DR3=00000000 DR6=ffff0ff0 DR7=00000400 FCW=037f FSW=0000 [ST=0] FTW=00 MXCSR=00000000 FPR0=0000000000000000 0000 FPR1=0000000000000000 0000 FPR2=0000000000000000 0000 FPR3=0000000000000000 0000 FPR4=0000000000000000 0000 FPR5=0000000000000000 0000 FPR6=0000000000000000 0000 FPR7=0000000000000000 0000 XMM00=00000000000000000000000000000000 XMM01=00000000000000000000000000000000 XMM02=00000000000000000000000000000000 XMM03=00000000000000000000000000000000 XMM04=00000000000000000000000000000000 XMM05=00000000000000000000000000000000 XMM06=00000000000000000000000000000000 XMM07=00000000000000000000000000000000
Comment 3 Justin M. Forbes 2010-08-11 17:16:37 EDT
Which version of seabios is this using?
Comment 4 H. Peter Anvin 2010-08-13 13:32:37 EDT
Comment 5 H. Peter Anvin 2010-08-13 13:43:46 EDT
Looking through the register dump, one thing that stands out to me is that ds_base is not 16-byte aligned - that is probably the part that makes KVM reject the state.
Comment 6 Gleb Natapov 2010-08-15 07:46:05 EDT
can you test if latest seabios from git://git.linuxtogo.org/home/kevin/seabios.git works?
Comment 7 H. Peter Anvin 2010-08-23 20:59:46 EDT
Tested it, it works.
Comment 8 Bug Zapper 2011-06-01 09:23:42 EDT
This message is a reminder that Fedora 13 is nearing its end of life. Approximately 30 (thirty) days from now Fedora will stop maintaining and issuing updates for Fedora 13. 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 WONTFIX if it remains open with a Fedora 'version' of '13'. Package Maintainer: If you wish for this bug to remain open because you plan to fix it in a currently maintained version, simply change the 'version' to a later Fedora version prior to Fedora 13's end of life. Bug Reporter: Thank you for reporting this issue and we are sorry that we may not be able to fix it before Fedora 13 is end of life. If you would still like to see this bug fixed and are able to reproduce it against a later version of Fedora please change the 'version' of this bug to the applicable version. If you are unable to change the version, please add a comment here and someone will do it for you. Although we aim to fix as many bugs as possible during every release's lifetime, sometimes those efforts are overtaken by events. Often a more recent Fedora release includes newer upstream software that fixes bugs or makes them obsolete. The process we are following is described here: http://fedoraproject.org/wiki/BugZappers/HouseKeeping
Comment 9 Bug Zapper 2011-06-29 09:15:01 EDT
Fedora 13 changed to end-of-life (EOL) status on 2011-06-25. Fedora 13 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 Fedora please feel free to reopen this bug against that version. Thank you for reporting this bug and we are sorry it could not be fixed.