[avrdude-dev] [bug #26408] Crash in stk500v2_open()

[Ferenc Kovacs]

URL:
  <http://savannah.nongnu.org/bugs/?26408>

                 Summary: Crash in stk500v2_open()
                 Project: AVR Downloader/UploaDEr
            Submitted by: derefer
            Submitted on: Thu 30 Apr 2009 07:50:10 PM GMT
                Category: None
                Severity: 3 - Normal
                Priority: 5 - Normal
              Item Group: None
                  Status: None
                 Privacy: Public
             Assigned to: None
         Originator Name: Ferenc Kovacs
        Originator Email: 
             Open/Closed: Open
         Discussion Lock: Any

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Details:

Hi,

When I connect something (e.g. a simple USB <-> Serial adapter,
instead of a working STK500) to /dev/ttyUSB0 and I enter:

$ avrdude-trunk -c stk500 -p m32 -P /dev/ttyUSB0
avrdude: stk500_getsync(): not in sync: resp=0x95
Segmentation fault (core dumped)

Loaded symbols for /lib64/ld-linux-x86-64.so.2
Core was generated by `avrdude -c stk500 -p m32 -P /dev/ttyUSB0'.
Program terminated with signal 11, Segmentation fault.
[New process 8709]
#0  0x00000000004253f8 in stk500v2_open (pgm=0x1935fd0, port=0x7fff255b465d
"/dev/ttyUSB0") at stk500v2.c:1190
1190      PDATA(pgm)->pgmtype = PGMTYPE_UNKNOWN;
(gdb) bt
#0  0x00000000004253f8 in stk500v2_open (pgm=0x1935fd0, port=0x7fff255b465d
"/dev/ttyUSB0") at stk500v2.c:1190
#1  0x000000000042aa13 in stk500generic_open (pgm=0x1935fd0,
port=0x7fff255b465d "/dev/ttyUSB0") at stk500generic.c:54
#2  0x0000000000403a84 in main (argc=7, argv=0x7fff255b3978) at main.c:777

Target: x86_64-linux-gnu
Compiler: gcc version 4.3.3 (Debian 4.3.3-5)

It seems to me, that the setup function for STK500V2 is not
called to initialize the cookie field.  STK500 doesn't seem to
use this field, but when we fallback to STK500V2 cookie gets
dereferenced and it's 0x0.  IMO, setup could be called in
stk500generic.c before opening STK500V2.

(Yes, it doesn't make too much sense to use AVRDUDE without a
working programmer :), but I couldn't make my STK500 work yet
due to some kernel issues with FTDI chips...)

Cheers,
Ferenc





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