[Qemu-devel] R: Re: [Bug 1423124] [NEW] QEMU crash after sending data on host serial port

[Ugo]

Hello Stefan,

the crash can be described better as a neverending loop started after having 
received data on serial ports, infact for going out I'm forced to kill the QEMU 
session from Windows. As result there is unfortunately  no system dump in the 
Windows dump folder.
I've tried to generate the backtrace with Windbg (attached), it shows 
something before sending data to COM and after having killed the neverednding 
loop, this in both cases : sending data from Windows to COM port (first 
backtrace) and sending data from linux to /dev/pty port.
I'm afraid that the dumps are not so rich, due to the neverending loop problem 
: I'm not able to debug better the situation.
Let me know if I can help more

Regards
UP


>----Messaggio originale---- 
>Da: address@hidden
>Data: 23-feb-2015 11.32
>A: <address@hidden>
>Ogg: Re: [Qemu-devel] [Bug 1423124] [NEW] QEMU crash after sending data on 
host serial port
>
>On Wed, Feb 18, 2015 at 11:29:58AM -0000, Ugo wrote:
>> I'm using QEMU for Windows last version.
>> The host system is Windows 7 64bits.
>> I'm excuting the following statment :
>> 
>> qemu-system-x86_64w.exe -hda debian.img -m 256 -net nic -net
>> tap,ifname=TAP32 -soundhw all -serial COM9
>> 
>> Qemu starts the emulated Debian and it runs correctly.
>> 
>> If I try to send data from Windows using COM9 to QEMU (both "real" or 
emulated by the COM0COM driver), QEMU crashes. Windows dump available if 
required.
>> If I try to send data to /dev/ttyS0 (that should be the Linux side of COM9) 
from Debian, again, the wirtual machine crashes.
>
>Please post details of the crash including the backtrace.  That might be
>enough information for someone to figure out the problem and send a
>patch to fix it.
>
>-- 
>You received this bug notification because you are subscribed to the bug
>report.
>https://bugs.launchpad.net/bugs/1423124
>
>Title:
>  QEMU crash after sending data on host serial port
>
>Status in QEMU:
>  New
>
>Bug description:
>  Good morning,
>
>  I'm using QEMU for Windows last version.
>  The host system is Windows 7 64bits.
>  I'm excuting the following statment :
>
>  qemu-system-x86_64w.exe -hda debian.img -m 256 -net nic -net
>  tap,ifname=TAP32 -soundhw all -serial COM9
>
>  Qemu starts the emulated Debian and it runs correctly.
>
>  If I try to send data from Windows using COM9 to QEMU (both "real" or 
emulated by the COM0COM driver), QEMU crashes. Windows dump available if 
required.
>  If I try to send data to /dev/ttyS0 (that should be the Linux side of COM9) 
from Debian, again, the wirtual machine crashes.
>
>  More details if necessary
>  Best regards
>  U.Poddine
>
>To manage notifications about this bug go to:
>https://bugs.launchpad.net/qemu/+bug/1423124/+subscriptions
>


** Attachment added: "Debug_1.txt"
   
https://bugs.launchpad.net/bugs/1423124/+attachment/4327303/+files/Debug_1.txt

-- 
You received this bug notification because you are a member of qemu-
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https://bugs.launchpad.net/bugs/1423124

Title:
  QEMU crash after sending data on host serial port

Status in QEMU:
  New

Bug description:
  Good morning,

  I'm using QEMU for Windows last version.
  The host system is Windows 7 64bits.
  I'm excuting the following statment :

  qemu-system-x86_64w.exe -hda debian.img -m 256 -net nic -net
  tap,ifname=TAP32 -soundhw all -serial COM9

  Qemu starts the emulated Debian and it runs correctly.

  If I try to send data from Windows using COM9 to QEMU (both "real" or 
emulated by the COM0COM driver), QEMU crashes. Windows dump available if 
required.
  If I try to send data to /dev/ttyS0 (that should be the Linux side of COM9) 
from Debian, again, the wirtual machine crashes.

  More details if necessary
  Best regards
  U.Poddine

To manage notifications about this bug go to:
https://bugs.launchpad.net/qemu/+bug/1423124/+subscriptions