misc/114019: transcode coring with sig11 by pthread_testcancel()

[Erich Zigler]

>Number:         114019
>Category:       misc
>Synopsis:       transcode coring with sig11 by pthread_testcancel()
>Confidential:   no
>Severity:       non-critical
>Priority:       medium
>Responsible:    freebsd-bugs
>State:          open
>Quarter:        
>Keywords:       
>Date-Required:
>Class:          sw-bug
>Submitter-Id:   current-users
>Arrival-Date:   Mon Jun 25 17:40:01 GMT 2007
>Closed-Date:
>Last-Modified:
>Originator:     Erich Zigler
>Release:        6.2-STABLE
>Organization:
>Environment:
FreeBSD nightcrawler.superhero.org 6.2-STABLE FreeBSD 6.2-STABLE #0: Sun Jun 24 22:05:10 CDT 2007     root at nightcrawler.superhero.org:/usr/obj/usr/src/sys/NIGHTCRAWLER  i386
>Description:
When executing this command:

transcode -q2 -i "test.mpg" -x auto,null -I 5 -K -G 0.2 -y im,null -F png -o test.png

The following occurs:

Segmentation fault (core dumped)

Contents of the core file:

[needo at nightcrawler ~]$ gdb /usr/local/bin/transcode
GNU gdb 6.1.1 [FreeBSD]
Copyright 2004 Free Software Foundation, Inc.
GDB is free software, covered by the GNU General Public License, and you are
welcome to change it and/or distribute copies of it under certain conditions.
Type "show copying" to see the conditions.
There is absolutely no warranty for GDB.  Type "show warranty" for details.
This GDB was configured as "i386-marcel-freebsd"...(no debugging symbols found)...
(gdb) core transcode.core
Core was generated by `transcode'.
Program terminated with signal 11, Segmentation fault.
Reading symbols from /usr/local/lib/libxml2.so.5...(no debugging symbols found)...done.
Loaded symbols for /usr/local/lib/libxml2.so.5
Reading symbols from /usr/local/lib/libiconv.so.3...(no debugging symbols found)...done.
Loaded symbols for /usr/local/lib/libiconv.so.3
Reading symbols from /lib/libm.so.4...(no debugging symbols found)...done.
Loaded symbols for /lib/libm.so.4
Reading symbols from /lib/libz.so.3...(no debugging symbols found)...done.
Loaded symbols for /lib/libz.so.3
Reading symbols from /lib/libpthread.so.2...(no debugging symbols found)...done.
Loaded symbols for /lib/libpthread.so.2
Reading symbols from /lib/libc.so.6...(no debugging symbols found)...done.
Loaded symbols for /lib/libc.so.6
Reading symbols from /libexec/ld-elf.so.1...(no debugging symbols found)...done.
Loaded symbols for /libexec/ld-elf.so.1
#0  0x2834d85b in pthread_testcancel () from /lib/libpthread.so.2
[New Thread 0x80ba200 (LWP 100063)]
[New Thread 0x80ba000 (runnable)]
[New LWP 100099]
(gdb) bt
#0  0x2834d85b in pthread_testcancel () from /lib/libpthread.so.2
#1  0x28345979 in pthread_mutexattr_init () from /lib/libpthread.so.2
#2  0x280d9450 in ?? ()
>How-To-Repeat:
Run:

transcode -q2 -i "test.mpg" -x auto,null -I 5 -K -G 0.2 -y im,null -F png -o test.png

Against a mpeg2 file.
>Fix:


>Release-Note:
>Audit-Trail:
>Unformatted: