Re: [Qemu-devel] [Bug 1815911] Re: aptitude crashes qemu-m68k with handle_cpu_signal received signal outside vCPU context

[John Paul Adrian Glaubitz]

On 2/15/19 1:47 PM, Laurent Vivier wrote:
> It seems it crashes during futex syscall:
> 
> ...
> [pid     4] getpid()                    = 4
> [pid     4] tgkill(4, 24, SIGRT_1)      = 0
> [pid    24] <... futex resumed> )       = ? ERESTARTSYS (To be restarted if 
> SA_RESTART is set)
> [pid    24] --- SIGRT_1 {si_signo=SIGRT_1, si_code=SI_TKILL, si_pid=4, 
> si_uid=0} ---
> [pid     4] futex(0x7f77abb4f610, FUTEX_WAIT_PRIVATE, 16777216, NULL 
> <unfinished ...>
> [pid    24] getpid()                    = 4
> [pid    24] --- SIGSEGV {si_signo=SIGSEGV, si_code=SEGV_MAPERR, si_addr=0x10} 
> ---
> ...

The crash also reproduces with qemu-sh4, so it's not specific to m68k.

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https://bugs.launchpad.net/bugs/1815911

Title:
  aptitude crashes qemu-m68k with handle_cpu_signal received signal
  outside vCPU context

Status in QEMU:
  New

Bug description:
  When building a package with sbuild on Debian, sbuild can use aptitude
  to resolve dependencies.

  Recently, some changes introduced to aptitude or related packages
  cause qemu to crash:

  (sid-m68k-sbuild)address@hidden:/# aptitude -y --without-recommends -o 
Dpkg::Options::=--force-confold -o 
Aptitude::CmdLine::Ignore-Trust-Violations=false -o 
Aptitude::ProblemResolver::StepScore=100 -o 
Aptitude::ProblemResolver::SolutionCost="safety, priority, 
non-default-versions" -o Aptitude::ProblemResolver::Hints::KeepDummy="reject 
sbuild-build-depends-core-dummy :UNINST" -o 
Aptitude::ProblemResolver::Keep-All-Level=55000 -o 
Aptitude::ProblemResolver::Remove-Essential-Level=maximum install vim
  Warning: Invalid locale (please review locale settings, this might lead to 
problems later):
    locale::facet::_S_create_c_locale name not valid
  The following NEW packages will be installed:
    libgpm2{a} vim vim-common{a} vim-runtime{a} xxd{a} 
  0 packages upgraded, 5 newly installed, 0 to remove and 1 not upgraded.
  Need to get 7225 kB/7260 kB of archives. After unpacking 33.5 MB will be used.
  qemu:handle_cpu_signal received signal outside vCPU context @ pc=0x6019d1bf
  qemu:handle_cpu_signal received signal outside vCPU context @ pc=0x601b64ab
  Segmentation fault
  (sid-m68k-sbuild)address@hidden:/#

  The crash does not reproduce on real hardware running Debian unstable.

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