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Date: Mon, 12 Nov 2012 13:47:20 +0100
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From: Stefan Hajnoczi <stefanha@gmail.com>
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Subject: Re: [Qemu-devel] [Bug 1077514] [NEW] *** buffer overflow detected
 ***: qemu-system-x86_64 terminated with nowait enabled
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To: Bug 1077514 <1077514@bugs.launchpad.net>
Cc: qemu-devel <qemu-devel@nongnu.org>

On Sun, Nov 11, 2012 at 12:24 AM, Kaare Baastrup <kaare@baastrup.org> wrote=
:
> Public bug reported:
>
> qemu-system-x86_64 -m 1024 -nographic -cpu coreduo -icount auto -hdachs 9=
80,16,32 -kernel asa842-vmlinuz -initrd asa842-initrd.gz -append "ide_gener=
ic.probe_mask=3D0x01 ide_core.chs=3D0.0:980,16,32 auto nousb console=3DttyS=
0,9600 bigphysarea=3D65536 no-hlt" -net nic -serial telnet::3020,server,now=
ait
> failed to initialize KVM: Device or resource busy
> Back to tcg accelerator.
> QEMU 1.2.0 monitor - type 'help' for more information
> (qemu) Warning: vlan 0 is not connected to host network
> *** buffer overflow detected ***: qemu-system-x86_64 terminated

I'm unable to reproduce this on Fedora 18 with qemu.git/master.

> =3D=3D=3D=3D=3D=3D=3D Backtrace: =3D=3D=3D=3D=3D=3D=3D=3D=3D
> /lib/x86_64-linux-gnu/libc.so.6(__fortify_fail+0x5c)[0x7fd9f04b882c]
> /lib/x86_64-linux-gnu/libc.so.6(+0x109700)[0x7fd9f04b7700]
> /lib/x86_64-linux-gnu/libc.so.6(+0x10a7be)[0x7fd9f04b87be]
> qemu-system-x86_64(+0xf1b5d)[0x7fd9f4bb1b5d]
> qemu-system-x86_64(+0x18f148)[0x7fd9f4c4f148]
> qemu-system-x86_64(main+0xfe3)[0x7fd9f4b35353]
> /lib/x86_64-linux-gnu/libc.so.6(__libc_start_main+0xed)[0x7fd9f03cf76d]
> qemu-system-x86_64(+0x796e9)[0x7fd9f4b396e9]

The backtrace is missing symbol information.  Please install the
debuginfo packages and repost the backtrace:
https://wiki.ubuntu.com/DebuggingProgramCrash#Debug_Symbol_Packages

Alternatively, please build qemu.git/master from source (it has symbol
information) and try to reproduce the bug.

Stefan