[Qemu-devel] [Bug 1163034] Re: gnutls28 fails to build from source in armhf

[Qemu-devel] [Bug 1163034] Re: gnutls28 fails to build from source in armhf

[Serge Hallyn]

** No longer affects: gnutls28 (Ubuntu)

** Also affects: qemu
   Importance: Undecided
       Status: New

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https://bugs.launchpad.net/bugs/1163034

Title:
  gnutls28 fails to build from source in armhf

Status in QEMU:
  New
Status in “qemu” package in Ubuntu:
  Confirmed

Bug description:
  Please look at
  https://code.launchpad.net/~costamagnagianfranco/+archive/costamagnagianfranco-ppa/+packages
  and
  https://code.launchpad.net/~costamagnagianfranco/+archive/costamagnagianfranco-ppa/+build/4457434

  I cannot make gnutls28 build on armhf, I suspect a builder problem

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[Qemu-devel] [Bug 1163034] Re: gnutls28 fails to build from source in armhf

[Peter Maydell]

Actually, assuming the guest ARM glibc doesn't have the printf() bug the
code is testing for, we shouldn't take the SIGSEGV anyway, so that's a
red herring. The actual problem here is the setrlimit().

The conftest.c test case works by using rlimit to limit the address
space. This generally doesn't work on QEMU because we just pass the
rlimit syscall through to the host, and end up limiting not just the
guest program but also QEMU itself.  QEMU doesn't expect its own
allocations to fail and typically dies in confusing ways as a result.
(Sometimes we do check allocations and call abort(), which then under
linux-user doesn't work properly because we treat the resulting signal
as if it were caused by the guest and not by QEMU's own code; IIRC we
end up hanging in that situation.) In this particular instance we
segfault in tb_alloc_page() because it doesn't check that
page_find_alloc() didn't return NULL.

[Confirmed by running qemu-arm under gdb.]

Fixing this would require us to implement the address space rlimits
entirely in QEMU by keeping track of how much memory we've handed the
guest so we can fail mmap() etc. That is probably relatively speaking
fairly tractable, though it's not a five minute job.

Unsupported syscall bugs are usually easy fixes, incidentally (though
occasionally they are nasty); also often QEMU will warn but things will
continue OK because the guest libc/userspace supports fallback code for
when a native kernel hasn't yet implemented the new syscall.

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https://bugs.launchpad.net/bugs/1163034

Title:
  gnutls28 fails to build from source in armhf

Status in QEMU:
  New
Status in “qemu” package in Ubuntu:
  Confirmed

Bug description:
  Please look at
  https://code.launchpad.net/~costamagnagianfranco/+archive/costamagnagianfranco-ppa/+packages
  and
  https://code.launchpad.net/~costamagnagianfranco/+archive/costamagnagianfranco-ppa/+build/4457434

  I cannot make gnutls28 build on armhf, I suspect a builder problem

To manage notifications about this bug go to:
https://bugs.launchpad.net/qemu/+bug/1163034/+subscriptions

[Qemu-devel] [Bug 1163034] Re: gnutls28 fails to build from source in armhf

[LocutusOfBorg]

I'm referring to bug 1042388, I din't know about the fallback on this,
but I have to say it doesn't work since apt exits and fails when
encounters this call, maybe the fallback has some problems?

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https://bugs.launchpad.net/bugs/1163034

Title:
  gnutls28 fails to build from source in armhf

Status in QEMU:
  New
Status in “qemu” package in Ubuntu:
  Confirmed

Bug description:
  Please look at
  https://code.launchpad.net/~costamagnagianfranco/+archive/costamagnagianfranco-ppa/+packages
  and
  https://code.launchpad.net/~costamagnagianfranco/+archive/costamagnagianfranco-ppa/+build/4457434

  I cannot make gnutls28 build on armhf, I suspect a builder problem

To manage notifications about this bug go to:
https://bugs.launchpad.net/qemu/+bug/1163034/+subscriptions

[Qemu-devel] [Bug 1163034] Re: linux-user mode can't handle guest setting RLIMIT_AS (hangs running gnutls28 configure check code)

[Peter Maydell]

** Summary changed:

- gnutls28 fails to build from source in armhf
+ linux-user mode can't handle guest setting RLIMIT_AS (hangs running gnutls28 configure check code)

** Changed in: qemu
       Status: New => Confirmed

-- 
You received this bug notification because you are a member of qemu-
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https://bugs.launchpad.net/bugs/1163034

Title:
  linux-user mode can't handle guest setting RLIMIT_AS (hangs running
  gnutls28 configure check code)

Status in QEMU:
  Confirmed
Status in “qemu” package in Ubuntu:
  Confirmed

Bug description:
  Please look at
  https://code.launchpad.net/~costamagnagianfranco/+archive/costamagnagianfranco-ppa/+packages
  and
  https://code.launchpad.net/~costamagnagianfranco/+archive/costamagnagianfranco-ppa/+build/4457434

  I cannot make gnutls28 build on armhf, I suspect a builder problem

To manage notifications about this bug go to:
https://bugs.launchpad.net/qemu/+bug/1163034/+subscriptions

[Qemu-devel] [Bug 1163034] Re: linux-user mode can't handle guest setting RLIMIT_AS (hangs running gnutls28 configure check code)

[Peter Maydell]

Regarding bug 1042388, those are the posix timer syscalls, and I guess
they've just been around long enough that apt expects them to exist.
Anyway, we should just implement them in QEMU.

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https://bugs.launchpad.net/bugs/1163034

Title:
  linux-user mode can't handle guest setting RLIMIT_AS (hangs running
  gnutls28 configure check code)

Status in QEMU:
  Confirmed
Status in “qemu” package in Ubuntu:
  Confirmed

Bug description:
  Please look at
  https://code.launchpad.net/~costamagnagianfranco/+archive/costamagnagianfranco-ppa/+packages
  and
  https://code.launchpad.net/~costamagnagianfranco/+archive/costamagnagianfranco-ppa/+build/4457434

  I cannot make gnutls28 build on armhf, I suspect a builder problem

To manage notifications about this bug go to:
https://bugs.launchpad.net/qemu/+bug/1163034/+subscriptions

[Qemu-devel] [Bug 1163034] Re: linux-user mode can't handle guest setting RLIMIT_AS (hangs running gnutls28 configure check code)

[Serge Hallyn]

This will come in when implemented upstream.

** Changed in: qemu (Ubuntu)
   Importance: High => Wishlist

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You received this bug notification because you are a member of qemu-
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https://bugs.launchpad.net/bugs/1163034

Title:
  linux-user mode can't handle guest setting RLIMIT_AS (hangs running
  gnutls28 configure check code)

Status in QEMU:
  Confirmed
Status in qemu package in Ubuntu:
  Confirmed

Bug description:
  Please look at
  https://code.launchpad.net/~costamagnagianfranco/+archive/costamagnagianfranco-ppa/+packages
  and
  https://code.launchpad.net/~costamagnagianfranco/+archive/costamagnagianfranco-ppa/+build/4457434

  I cannot make gnutls28 build on armhf, I suspect a builder problem

To manage notifications about this bug go to:
https://bugs.launchpad.net/qemu/+bug/1163034/+subscriptions

[Qemu-devel] [Bug 1163034] Re: linux-user mode can't handle guest setting a very small RLIMIT_AS (hangs running gnutls28, coreutils configure check code)

[Peter Maydell]

** Summary changed:

- linux-user mode can't handle guest setting RLIMIT_AS (hangs running gnutls28 configure check code)
+ linux-user mode can't handle guest setting a very small RLIMIT_AS (hangs running gnutls28, coreutils configure check code)

** Tags added: linux-user

-- 
You received this bug notification because you are a member of qemu-
devel-ml, which is subscribed to QEMU.
https://bugs.launchpad.net/bugs/1163034

Title:
  linux-user mode can't handle guest setting a very small RLIMIT_AS
  (hangs running gnutls28, coreutils configure check code)

Status in QEMU:
  Confirmed
Status in qemu package in Ubuntu:
  Confirmed

Bug description:
  Please look at
  https://code.launchpad.net/~costamagnagianfranco/+archive/costamagnagianfranco-ppa/+packages
  and
  https://code.launchpad.net/~costamagnagianfranco/+archive/costamagnagianfranco-ppa/+build/4457434

  I cannot make gnutls28 build on armhf, I suspect a builder problem

To manage notifications about this bug go to:
https://bugs.launchpad.net/qemu/+bug/1163034/+subscriptions

[Bug 1163034] Re: linux-user mode can't handle guest setting a very small RLIMIT_AS (hangs running gnutls28, coreutils configure check code)

[Thomas Huth]

It's been a while since the last change to this ticket ... Has this ever
been implemented?

-- 
You received this bug notification because you are a member of qemu-
devel-ml, which is subscribed to QEMU.
https://bugs.launchpad.net/bugs/1163034

Title:
  linux-user mode can't handle guest setting a very small RLIMIT_AS
  (hangs running gnutls28, coreutils configure check code)

Status in QEMU:
  Confirmed
Status in qemu package in Ubuntu:
  Confirmed

Bug description:
  Please look at
  https://code.launchpad.net/~costamagnagianfranco/+archive/costamagnagianfranco-ppa/+packages
  and
  https://code.launchpad.net/~costamagnagianfranco/+archive/costamagnagianfranco-ppa/+build/4457434

  I cannot make gnutls28 build on armhf, I suspect a builder problem

To manage notifications about this bug go to:
https://bugs.launchpad.net/qemu/+bug/1163034/+subscriptions

[Bug 1163034] Re: linux-user mode can't handle guest setting a very small RLIMIT_AS (hangs running gnutls28, coreutils configure check code)

[Peter Maydell]

This bug is still valid, yes.

-- 
You received this bug notification because you are a member of qemu-
devel-ml, which is subscribed to QEMU.
https://bugs.launchpad.net/bugs/1163034

Title:
  linux-user mode can't handle guest setting a very small RLIMIT_AS
  (hangs running gnutls28, coreutils configure check code)

Status in QEMU:
  Confirmed
Status in qemu package in Ubuntu:
  Confirmed

Bug description:
  Please look at
  https://code.launchpad.net/~costamagnagianfranco/+archive/costamagnagianfranco-ppa/+packages
  and
  https://code.launchpad.net/~costamagnagianfranco/+archive/costamagnagianfranco-ppa/+build/4457434

  I cannot make gnutls28 build on armhf, I suspect a builder problem

To manage notifications about this bug go to:
https://bugs.launchpad.net/qemu/+bug/1163034/+subscriptions

[Bug 1163034] Re: linux-user mode can't handle guest setting a very small RLIMIT_AS (hangs running gnutls28, coreutils configure check code)

[Thomas Huth]

This is an automated cleanup. This bug report has been moved to QEMU's
new bug tracker on gitlab.com and thus gets marked as 'expired' now.
Please continue with the discussion here:

 https://gitlab.com/qemu-project/qemu/-/issues/95


** Changed in: qemu
       Status: Confirmed => Expired

** Bug watch added: gitlab.com/qemu-project/qemu/-/issues #95
   https://gitlab.com/qemu-project/qemu/-/issues/95

-- 
You received this bug notification because you are a member of qemu-
devel-ml, which is subscribed to QEMU.
https://bugs.launchpad.net/bugs/1163034

Title:
  linux-user mode can't handle guest setting a very small RLIMIT_AS
  (hangs running gnutls28, coreutils configure check code)

Status in QEMU:
  Expired
Status in qemu package in Ubuntu:
  Confirmed

Bug description:
  Please look at
  https://code.launchpad.net/~costamagnagianfranco/+archive/costamagnagianfranco-ppa/+packages
  and
  https://code.launchpad.net/~costamagnagianfranco/+archive/costamagnagianfranco-ppa/+build/4457434

  I cannot make gnutls28 build on armhf, I suspect a builder problem

To manage notifications about this bug go to:
https://bugs.launchpad.net/qemu/+bug/1163034/+subscriptions