[Qemu-devel] [Bug 1815263] [NEW] hvf accelerator crashes on quest boot

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[Qemu-devel] [Bug 1815263] [NEW] hvf accelerator crashes on quest boot

From:	Nathan Wallace
Subject:	[Qemu-devel] [Bug 1815263] [NEW] hvf accelerator crashes on quest boot
Date:	Sat, 09 Feb 2019 04:07:31 -0000
Public bug reported:

Host OS: macOS High Sierra (10.13.6)
MacBook Pro (Retina, Mid 2015)
Processor: 2.8GHz Intel Core i7
Guest OS: OpenBSD 6.4 install media (install64.iso)
Qemu 3.1.0 release, built with:
./configure --prefix=/usr/local/Cellar/qemu/3.1.0_1 --cc=clang
      --host-cc=clang
      --disable-bsd-user
      --disable-guest-agent
      --enable-curses
      --enable-libssh2
      --enable-vde
      --extra-cflags=-DNCURSES_WIDECHAR=1
      --enable-cocoa
      --disable-sdl
      --disable-gtk
      --enable-hvf
      --target-list=x86_64-softmmu
      --enable-debug

I invoke qemu like this:
Last command had exit code: 0 at 22:58
address@hidden:~
$ sudo qemu-system-x86_64 -M accel=hvf -boot d -cdrom ~/Downloads/install64.iso
Password:
qemu-system-x86_64: warning: host doesn't support requested feature: 
CPUID.80000001H:ECX.svm [bit 2]
bad size

Abort trap: 6
Last command had exit code: 134 at 22:58
address@hidden:~
$

I ran qemu in lldb to get a stack trace and I get:
Last command had exit code: 0 at 22:54
address@hidden:~/Downloads
$ sudo lldb -- qemu-system-x86_64 -M accel=hvf -boot d -cdrom 
/Users/nwallace/Downloads/install64.iso
Password:
(lldb) target create "qemu-system-x86_64"
Current executable set to 'qemu-system-x86_64' (x86_64).
(lldb) settings set -- target.run-args  "-M" "accel=hvf" "-boot" "d" "-cdrom" 
"/Users/nwallace/Downloads/install64.i
so"
(lldb) run
Process 96474 launched: '/usr/local/bin/qemu-system-x86_64' (x86_64)
Process 96474 stopped
* thread #1, queue = 'com.apple.main-thread', stop reason = signal SIGUSR2
    frame #0: 0x00007fff5ef0c00a libsystem_kernel.dylib`__sigsuspend + 10
libsystem_kernel.dylib`__sigsuspend:
->  0x7fff5ef0c00a <+10>: jae    0x7fff5ef0c014            ; <+20>
    0x7fff5ef0c00c <+12>: movq   %rax, %rdi
    0x7fff5ef0c00f <+15>: jmp    0x7fff5ef02b0e            ; cerror
    0x7fff5ef0c014 <+20>: retq
Target 0: (qemu-system-x86_64) stopped.
(lldb) process handle SIGUSR1 -n true -p true -s false
NAME         PASS   STOP   NOTIFY
===========  =====  =====  ======
SIGUSR1      true   false  true
(lldb) process handle SIGUSR2 -n true -p true -s false
NAME         PASS   STOP   NOTIFY
===========  =====  =====  ======
SIGUSR2      true   false  true
(lldb) c
Process 96474 resuming
qemu-system-x86_64: warning: host doesn't support requested feature: 
CPUID.80000001H:ECX.svm [bit 2]
Process 96474 stopped and restarted: thread 9 received signal: SIGUSR2
<line above repeats about 64 times or so>
Process 96474 stopped and restarted: thread 9 received signal: SIGUSR2
bad size

Process 96474 stopped
* thread #9, stop reason = signal SIGABRT
    frame #0: 0x00007fff5ef0bb66 libsystem_kernel.dylib`__pthread_kill + 10
libsystem_kernel.dylib`__pthread_kill:
->  0x7fff5ef0bb66 <+10>: jae    0x7fff5ef0bb70            ; <+20>
    0x7fff5ef0bb68 <+12>: movq   %rax, %rdi
    0x7fff5ef0bb6b <+15>: jmp    0x7fff5ef02ae9            ; cerror_nocancel
    0x7fff5ef0bb70 <+20>: retq
Target 0: (qemu-system-x86_64) stopped.
(lldb) bt
* thread #9, stop reason = signal SIGABRT
  * frame #0: 0x00007fff5ef0bb66 libsystem_kernel.dylib`__pthread_kill + 10
    frame #1: 0x00007fff5f0d6080 libsystem_pthread.dylib`pthread_kill + 333
    frame #2: 0x00007fff5ee671ae libsystem_c.dylib`abort + 127
    frame #3: 0x000000010016b6ec qemu-system-x86_64`exec_cmps_single + 400
    frame #4: 0x000000010016ada4 qemu-system-x86_64`exec_cmps + 65
    frame #5: 0x0000000100169aaa qemu-system-x86_64`exec_instruction + 48
    frame #6: 0x0000000100164eb2 qemu-system-x86_64`hvf_vcpu_exec + 2658
    frame #7: 0x000000010005bed6 qemu-system-x86_64`qemu_hvf_cpu_thread_fn + 200
    frame #8: 0x00000001003ee531 qemu-system-x86_64`qemu_thread_start + 107
    frame #9: 0x00007fff5f0d3661 libsystem_pthread.dylib`_pthread_body + 340
    frame #10: 0x00007fff5f0d350d libsystem_pthread.dylib`_pthread_start + 377
    frame #11: 0x00007fff5f0d2bf9 libsystem_pthread.dylib`thread_start + 13
(lldb) quit
Quitting LLDB will kill one or more processes. Do you really want to proceed: 
[Y/n] Y
Last command had exit code: 0 at 23:01
address@hidden:~/Downloads
$


I'm happy to work with someone more knowledgeable to reproduce this issue and 
provide debugging assistance as I'm able.

** Affects: qemu
     Importance: Undecided
         Status: New

-- 
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https://bugs.launchpad.net/bugs/1815263

Title:
  hvf accelerator crashes on quest boot

Status in QEMU:
  New

Bug description:
  Host OS: macOS High Sierra (10.13.6)
  MacBook Pro (Retina, Mid 2015)
  Processor: 2.8GHz Intel Core i7
  Guest OS: OpenBSD 6.4 install media (install64.iso)
  Qemu 3.1.0 release, built with:
  ./configure --prefix=/usr/local/Cellar/qemu/3.1.0_1 --cc=clang
        --host-cc=clang
        --disable-bsd-user
        --disable-guest-agent
        --enable-curses
        --enable-libssh2
        --enable-vde
        --extra-cflags=-DNCURSES_WIDECHAR=1
        --enable-cocoa
        --disable-sdl
        --disable-gtk
        --enable-hvf
        --target-list=x86_64-softmmu
        --enable-debug

  I invoke qemu like this:
  Last command had exit code: 0 at 22:58
  address@hidden:~
  $ sudo qemu-system-x86_64 -M accel=hvf -boot d -cdrom 
~/Downloads/install64.iso
  Password:
  qemu-system-x86_64: warning: host doesn't support requested feature: 
CPUID.80000001H:ECX.svm [bit 2]
  bad size

  Abort trap: 6
  Last command had exit code: 134 at 22:58
  address@hidden:~
  $

  I ran qemu in lldb to get a stack trace and I get:
  Last command had exit code: 0 at 22:54
  address@hidden:~/Downloads
  $ sudo lldb -- qemu-system-x86_64 -M accel=hvf -boot d -cdrom 
/Users/nwallace/Downloads/install64.iso
  Password:
  (lldb) target create "qemu-system-x86_64"
  Current executable set to 'qemu-system-x86_64' (x86_64).
  (lldb) settings set -- target.run-args  "-M" "accel=hvf" "-boot" "d" "-cdrom" 
"/Users/nwallace/Downloads/install64.i
  so"
  (lldb) run
  Process 96474 launched: '/usr/local/bin/qemu-system-x86_64' (x86_64)
  Process 96474 stopped
  * thread #1, queue = 'com.apple.main-thread', stop reason = signal SIGUSR2
      frame #0: 0x00007fff5ef0c00a libsystem_kernel.dylib`__sigsuspend + 10
  libsystem_kernel.dylib`__sigsuspend:
  ->  0x7fff5ef0c00a <+10>: jae    0x7fff5ef0c014            ; <+20>
      0x7fff5ef0c00c <+12>: movq   %rax, %rdi
      0x7fff5ef0c00f <+15>: jmp    0x7fff5ef02b0e            ; cerror
      0x7fff5ef0c014 <+20>: retq
  Target 0: (qemu-system-x86_64) stopped.
  (lldb) process handle SIGUSR1 -n true -p true -s false
  NAME         PASS   STOP   NOTIFY
  ===========  =====  =====  ======
  SIGUSR1      true   false  true
  (lldb) process handle SIGUSR2 -n true -p true -s false
  NAME         PASS   STOP   NOTIFY
  ===========  =====  =====  ======
  SIGUSR2      true   false  true
  (lldb) c
  Process 96474 resuming
  qemu-system-x86_64: warning: host doesn't support requested feature: 
CPUID.80000001H:ECX.svm [bit 2]
  Process 96474 stopped and restarted: thread 9 received signal: SIGUSR2
  <line above repeats about 64 times or so>
  Process 96474 stopped and restarted: thread 9 received signal: SIGUSR2
  bad size

  Process 96474 stopped
  * thread #9, stop reason = signal SIGABRT
      frame #0: 0x00007fff5ef0bb66 libsystem_kernel.dylib`__pthread_kill + 10
  libsystem_kernel.dylib`__pthread_kill:
  ->  0x7fff5ef0bb66 <+10>: jae    0x7fff5ef0bb70            ; <+20>
      0x7fff5ef0bb68 <+12>: movq   %rax, %rdi
      0x7fff5ef0bb6b <+15>: jmp    0x7fff5ef02ae9            ; cerror_nocancel
      0x7fff5ef0bb70 <+20>: retq
  Target 0: (qemu-system-x86_64) stopped.
  (lldb) bt
  * thread #9, stop reason = signal SIGABRT
    * frame #0: 0x00007fff5ef0bb66 libsystem_kernel.dylib`__pthread_kill + 10
      frame #1: 0x00007fff5f0d6080 libsystem_pthread.dylib`pthread_kill + 333
      frame #2: 0x00007fff5ee671ae libsystem_c.dylib`abort + 127
      frame #3: 0x000000010016b6ec qemu-system-x86_64`exec_cmps_single + 400
      frame #4: 0x000000010016ada4 qemu-system-x86_64`exec_cmps + 65
      frame #5: 0x0000000100169aaa qemu-system-x86_64`exec_instruction + 48
      frame #6: 0x0000000100164eb2 qemu-system-x86_64`hvf_vcpu_exec + 2658
      frame #7: 0x000000010005bed6 qemu-system-x86_64`qemu_hvf_cpu_thread_fn + 
200
      frame #8: 0x00000001003ee531 qemu-system-x86_64`qemu_thread_start + 107
      frame #9: 0x00007fff5f0d3661 libsystem_pthread.dylib`_pthread_body + 340
      frame #10: 0x00007fff5f0d350d libsystem_pthread.dylib`_pthread_start + 377
      frame #11: 0x00007fff5f0d2bf9 libsystem_pthread.dylib`thread_start + 13
  (lldb) quit
  Quitting LLDB will kill one or more processes. Do you really want to proceed: 
[Y/n] Y
  Last command had exit code: 0 at 23:01
  address@hidden:~/Downloads
  $

  
  I'm happy to work with someone more knowledgeable to reproduce this issue and 
provide debugging assistance as I'm able.

To manage notifications about this bug go to:
https://bugs.launchpad.net/qemu/+bug/1815263/+subscriptions
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