Re: [Qemu-devel] [Bug 1285505] Re: [ppa 2.0~git-20140225] SIGABRT with -virtfs

[Serge Hallyn <1285505@bugs.launchpad.net>]

gdb stack dump:

Program received signal SIGABRT, Aborted.
0x00007ffff2849f79 in __GI_raise (sig=sig@entry=6) at ../nptl/sysdeps/unix/sysv/linux/raise.c:56
56      ../nptl/sysdeps/unix/sysv/linux/raise.c: No such file or directory.
(gdb) where
#0  0x00007ffff2849f79 in __GI_raise (sig=sig@entry=6) at ../nptl/sysdeps/unix/sysv/linux/raise.c:56
#1  0x00007ffff284d388 in __GI_abort () at abort.c:89
#2  0x00007ffff793c195 in g_assertion_message () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007ffff793c22a in g_assertion_message_expr () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#4  0x0000555555783d09 in object_initialize_with_type (data=data@entry=0x7fffe27fd910, 
    size=size@entry=6300032, type=0x0) at qom/object.c:331
#5  0x0000555555783d78 in object_initialize (data=data@entry=0x7fffe27fd910, size=size@entry=6300032, 
    typename=typename@entry=0x555555914f28 "virtio-9p-device") at qom/object.c:350
#6  0x0000555555735153 in virtio_9p_pci_instance_init (obj=0x7fffe27fd010) at hw/virtio/virtio-pci.c:943
#7  0x0000555555783c23 in object_initialize_with_type (data=data@entry=0x7fffe27fd010, 
    size=<optimized out>, type=type@entry=0x5555561c0580) at qom/object.c:342
#8  0x0000555555783dc0 in object_new_with_type (type=0x5555561c0580) at qom/object.c:441
#9  0x0000555555783e55 in object_new (typename=typename@entry=0x5555561c79b0 "virtio-9p-pci")
    at qom/object.c:451
#10 0x0000555555768d2d in qdev_device_add (opts=0x5555561c7900) at qdev-monitor.c:526
#11 0x00005555557b8289 in device_init_func (opts=<optimized out>, opaque=<optimized out>) at vl.c:2259
#12 0x00005555558da5fb in qemu_opts_foreach (list=<optimized out>, 
    func=0x5555557b8270 <device_init_func>, opaque=0x0, abort_on_failure=<optimized out>)
    at util/qemu-option.c:1149
#13 0x00005555555e9743 in main (argc=<optimized out>, argv=<optimized out>, envp=<optimized out>)
    at vl.c:4249

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https://bugs.launchpad.net/bugs/1285505

Title:
  [ppa 2.0~git-20140225] SIGABRT with -virtfs

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

Bug description:
  As requested on u-devel@, I tested QEMU
  2.0~git-20140225.aa0d1f4-0ubuntu2 from ppa:ubuntu-virt/candidate. This
  has a regression with virtfs.

  I created a simple cloud-image based VM with autopkgtest:

    $ sudo apt-get install autopkgtest
    $ adt-buildvm-ubuntu-cloud

  This part works fine with the new QEMU (it already boots the cloud-
  image in qemu and runs cloud-init). But running it with a shared 9p
  directory crashes:

    $ mkdir -p /tmp/shared
    $ qemu-system-x86_64 -enable-kvm -m 1024 -nographic -virtfs local,id=autopkgtest,path=/tmp/shared,security_model=none,mount_tag=myshare -snapshot adt-trusty-amd64-cloud.img
  **
  ERROR:/build/buildd/qemu-2.0~git-20140225.aa0d1f4/qom/object.c:331:object_initialize_with_type: assertion failed: (type != NULL)
  Abgebrochen (Speicherabzug geschrieben)

  It should be easy enough to reproduce and the assertion message
  already should be clear, but this is the intersting part of the
  (unretraced) stack trace:

   #2  0x00007fe3329a9195 in g_assertion_message (domain=domain@entry=0x0, file=file@entry=0x7fe334c5a8e8 "/build/buildd/qemu-2.0~git-20140225.aa0d1f4/qom/object.c", line=line@entry=331, func=func@entry=0x7fe334c5ac40 "object_initialize_with_type", message=message@entry=0x7fe336e06e40 "assertion failed: (type != NULL)") at /build/buildd/glib2.0-2.39.90/./glib/gtestutils.c:2291
           lstr = "331\000\377\177\000\000\320ޠF\377\177\000\000\220\026\321\066\343\177\000\000R\252\305\064\343\177\000"
           s = 0x7fe336e06e70 "pp\340\066\343\177"
   #3  0x00007fe3329a922a in g_assertion_message_expr (domain=0x0, file=0x7fe334c5a8e8 "/build/buildd/qemu-2.0~git-20140225.aa0d1f4/qom/object.c", line=331, func=0x7fe334c5ac40 "object_initialize_with_type", expr=<optimized out>) at /build/buildd/glib2.0-2.39.90/./glib/gtestutils.c:2306
           s = 0x7fe336e06e40 "assertion failed: (type != NULL)"

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