xen discuss - Jul 2007 - qemu-dm segfaults, when using the monitor''s "info" command

When using a xen hvm domain with "sdl=1" and "monitor=1" in
the python config file,
switch to sdl monitor window (ctrl-alt-2), run "info" command:
qemu-dm process core dumps.

# pstack /cores/qemu-dm-1161
core ''/cores/qemu-dm-1161'' of 1161:    
/usr/lib/xen/bin/qemu-dm -d 4 -m 512 -bo
ot c -serial null -vcpus 1 -ac
-----------------  lwp# 1 / thread# 1  --------------------
 00007ffffeef1150 strlen () + 40
 00007ffffef374f9 vsnprintf () + 79
 000000000043b046 term_vprintf () + 26
 000000000043b100 term_printf () + a0
 000000000043b1ee help_cmd1 () + 4e
 000000000043c067 monitor_handle_command1 () + 607
 000000000043ac50 readline_handle_byte () + 5a0
 000000000043ba2d term_read () + 1d
 000000000043dbe2 kbd_send_chars () + 72
 000000000043dd13 kbd_put_keysym () + f3
 000000000048323e sdl_refresh () + 57e
 0000000000436fef gui_update () + f
 000000000043331c qemu_run_timers () + 2c
 00000000004377e3 main_loop_wait () + 1d3
 0000000000488d3a main_loop () + 7a
 0000000000438c03 main () + 1023
 000000000043288c _start () + 6c
-----------------  lwp# 2 / thread# 2  --------------------
 00007ffffef6db2a _read () + a
 0000000000457c89 dma_thread_func () + 29
 00007ffffef6a297 _thr_setup () + 67
 00007ffffef6a540 _lwp_start ()

xen.hg/tools/ioemu/monitor.c, info_cmds[], an empty string for 
term_cmd_t.params is missing:

    { "capture", "", do_info_capture,
      "show capture information" },

must be changed to:

    { "capture", "", do_info_capture,
      "", "show capture information" },
 
 
This message posted from opensolaris.org

On Mon, Jul 30, 2007 at 03:30:44AM -0700, J??rgen Keil wrote:
> When using a xen hvm domain with "sdl=1" and
"monitor=1" in the python config file,
> switch to sdl monitor window (ctrl-alt-2), run "info" command:
> qemu-dm process core dumps.
This is an upstream bug that''s fixed in xen-unstable (but not xen 3.1).
Could
you file a bug at bugs.opensolaris.org for us please?

thanks
john

> On Mon, Jul 30, 2007 at 03:30:44AM -0700, Jürgen Keil wrote:
> 
> > When using a xen hvm domain with "sdl=1" and
"monitor=1" in the python config file,
> > switch to sdl monitor window (ctrl-alt-2), run "info"
command:
> > qemu-dm process core dumps.
> 
> This is an upstream bug that's fixed in xen-unstable (but not xen 3.1).
Could
> you file a bug at bugs.opensolaris.org for us please?
I filed 6586806: 

    monitor "info" command crashes qemu-dm process with a SIGSEGV
 
 
This message posted from opensolaris.org
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