On Mon, Apr 08, 2013 at 12:27:06PM +0000, Zhanghaoyu (A) wrote: > On Sun, Apr 07, 2013 at 04:58:07AM +0000, Zhanghaoyu (A) wrote: > > >>> I start a kvm VM with vnc(using the zrle protocol) connect, sometimes qemu program crashed during starting period, received signal SIGABRT. > > >>> Trying about 20 times, this crash may be reproduced. > > >>> I guess the cause memory corruption or double free. > > >> > > >> Which version of QEMU are you running? > > >> > > >> Please try qemu.git/master. > > >> > > >> Stefan > > > > > >I used the QEMU download from qemu.git (http://git.qemu.org/git/qemu.git). > > > > Great, thanks! Can you please post a backtrace? > > > > The easiest way is: > > > > $ ulimit -c unlimited > > $ qemu-system-x86_64 -enable-kvm -m 1024 ... > > ...crash... > > $ gdb -c qemu-system-x86_64.core > > (gdb) bt > > > > Depending on how your system is configured the core file might have a different filename but there should be a file name *core* the current working directory > after the crash. > > > > The backtrace will make it possible to find out where the crash occurred. > > > > Thanks, > > Stefan > > backtrace from core file is shown as below: > > Program received signal SIGABRT, Aborted. > 0x00007f32eda3dd95 in raise () from /lib64/libc.so.6 > (gdb) bt > #0 0x00007f32eda3dd95 in raise () from /lib64/libc.so.6 > #1 0x00007f32eda3f2ab in abort () from /lib64/libc.so.6 > #2 0x00007f32eda77ece in __libc_message () from /lib64/libc.so.6 > #3 0x00007f32eda7dc06 in malloc_printerr () from /lib64/libc.so.6 > #4 0x00007f32eda7ecda in _int_free () from /lib64/libc.so.6 > #5 0x00007f32efd3452c in free_and_trace (mem=0x7f3290000cd0) at vl.c:2880 > #6 0x00007f32efd251a1 in buffer_free (buffer=0x7f32f0c82890) at ui/vnc.c:505 > #7 0x00007f32efd20c56 in vnc_zrle_clear (vs=0x7f32f0c762d0) > at ui/vnc-enc-zrle.c:364 > #8 0x00007f32efd26d07 in vnc_disconnect_finish (vs=0x7f32f0c762d0) > at ui/vnc.c:1050 > #9 0x00007f32efd275c5 in vnc_client_read (opaque=0x7f32f0c762d0) > at ui/vnc.c:1349 > #10 0x00007f32efcb397c in qemu_iohandler_poll (readfds=0x7f32f074d020, > writefds=0x7f32f074d0a0, xfds=0x7f32f074d120, ret=1) at iohandler.c:124 > #11 0x00007f32efcb46e8 in main_loop_wait (nonblocking=0) at main-loop.c:417 > #12 0x00007f32efd31159 in main_loop () at vl.c:2133 > #13 0x00007f32efd38070 in main (argc=46, argv=0x7fff7f5df178, > envp=0x7fff7f5df2f0) at vl.c:4481 CCing Corentin and Gerd who are more familiar with the VNC code than me. Stefan -- To unsubscribe from this list: send the line "unsubscribe kvm" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
