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GDB stack trace for cvs rdiff -t crash


From: James Cribb
Subject: GDB stack trace for cvs rdiff -t crash
Date: Thu, 27 Mar 2003 11:13:25 +1100

| From: James Cribb 
| Sent: Thursday, 27 March 2003 10:08
| To: 'Larry Jones'; 'Mark D. Baushke'; address@hidden
| Subject: RE: cvs rdiff -t consistently crashes with SEGV when 
| processing files
| 
| I just built cvs-1.11.5.tar.bz2 from cvshome.org and it too 
| crashes with SEGV on the same command in the script.

Backtrace from GDB shows the SEGV occurs in malloc() from libc.so.6.
But it only seems to occur when processing files in Attic directories.

------------------------
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details.
This GDB was configured as "i386-redhat-linux"...
Core was generated by `cvs rdiff -t m'.
Program terminated with signal 11, Segmentation fault.
Reading symbols from /lib/libcrypt.so.1...done.
Loaded symbols for /lib/libcrypt.so.1
Reading symbols from /usr/kerberos/lib/libgssapi_krb5.so.2...done.
Loaded symbols for /usr/kerberos/lib/libgssapi_krb5.so.2
Reading symbols from /usr/kerberos/lib/libkrb5.so.3...done.
Loaded symbols for /usr/kerberos/lib/libkrb5.so.3
Reading symbols from /usr/kerberos/lib/libk5crypto.so.3...done.
Loaded symbols for /usr/kerberos/lib/libk5crypto.so.3
Reading symbols from /lib/libresolv.so.2...done.
Loaded symbols for /lib/libresolv.so.2
Reading symbols from /usr/kerberos/lib/libcom_err.so.3...done.
Loaded symbols for /usr/kerberos/lib/libcom_err.so.3
Reading symbols from /lib/libnsl.so.1...done.
Loaded symbols for /lib/libnsl.so.1
Reading symbols from /lib/libc.so.6...done.
Loaded symbols for /lib/libc.so.6
Reading symbols from /lib/ld-linux.so.2...done.
Loaded symbols for /lib/ld-linux.so.2
#0  0x40178642 in chunk_alloc (ar_ptr=0x4022ac80, nb=56) at
malloc.c:2878
2878    malloc.c: No such file or directory.
        in malloc.c
(gdb) bt
#0  0x40178642 in chunk_alloc (ar_ptr=0x4022ac80, nb=56) at
malloc.c:2878
#1  0x40178444 in __libc_malloc (bytes=49) at malloc.c:2811
#2  0x0809a226 in xmalloc (bytes=49) at subr.c:40
#3  0x080682bd in Find_Names (repository=0x80f2810
"/tmp/cvs-rdiff-bug/repository/m/d", which=6,
    aflag=0, optentries=0xbffff270) at find_names.c:101
#4  0x0808c195 in do_recursion (frame=0xbffff2e0) at recurse.c:670
#5  0x0808cc00 in do_dir_proc (p=0x80eef78, closure=0xbffff390) at
recurse.c:1096
#6  0x0806988a in walklist (list=0x80f1788, proc=0x808c5b8
<do_dir_proc>, closure=0xbffff390)
    at hash.c:370
#7  0x0808c3cc in do_recursion (frame=0xbffff440) at recurse.c:763
#8  0x0808cc00 in do_dir_proc (p=0x80eee20, closure=0xbffff4f0) at
recurse.c:1096
#9  0x0806988a in walklist (list=0x80ef2a8, proc=0x808c5b8
<do_dir_proc>, closure=0xbffff4f0)
    at hash.c:370
#10 0x0808c3cc in do_recursion (frame=0xbffff580) at recurse.c:763
#11 0x0808bd6e in start_recursion (fileproc=0x807d114 <patch_fileproc>,
filesdoneproc=0,
    direntproc=0x807e110 <patch_dirproc>, dirleaveproc=0, callerdat=0x0,
argc=0, argv=0x80eeed0,
    local=0, which=6, aflag=0, locktype=1, update_preload=0x80eeec0 "m",
dosrcs=1) at recurse.c:354
#12 0x0807d0f2 in patch_proc (argc=1, argv=0x80eee78, xwhere=0x0,
mwhere=0x0, mfile=0x0,
    shorten=0, local_specified=0, mname=0xbffff9de "m", msg=0x80d9a02
"Patching") at patch.c:356
#13 0x080798ee in do_module (db=0x80eefc8, mname=0xbffff9de "m",
m_type=PATCH,
    msg=0x80d9a02 "Patching", callback_proc=0x807cd9c <patch_proc>,
where=0x0, shorten=0,
    local_specified=0, run_module_prog=0, build_dirs=0, extra_arg=0x0)
at modules.c:299
#14 0x0807cd61 in patch (argc=1, argv=0xbffff890) at patch.c:255
#15 0x0807809c in main (argc=3, argv=0xbffff888) at main.c:991
#16 0x40118336 in __libc_start_main (main=0x80773ac <main>, argc=4,
ubp_av=0xbffff884,
    init=0x804a398 <_init>, fini=0x80c7940 <_fini>, rtld_fini=0x4000d2fc
<_dl_fini>,
    stack_end=0xbffff87c) at ../sysdeps/generic/libc-start.c:129


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