[bug #29358] segmentation fault in isdir1 with grep-2.6.1

[Brian Gough]

URL:
  <http://savannah.gnu.org/bugs/?29358>

                 Summary: segmentation fault in isdir1 with grep-2.6.1
                 Project: grep
            Submitted by: bjg
            Submitted on: Sat 27 Mar 2010 11:39:02 AM GMT
                Category: None
                Severity: 3 - Normal
              Item Group: None
                  Status: None
                 Privacy: Public
             Assigned to: None
             Open/Closed: Open
         Discussion Lock: Any

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Details:

On fencepost.gnu.org there is a segmentation fault showing up in grep-2.6.1
in recursive grep with --include with empty subdirectories.  The complete
build log for grep is at /gd/gnu/gnusys/logs/grep-2.6.1.log

Test case:

address@hidden:~/ftp/foo$ mkdir emptydir
address@hidden:~/ftp/foo$ mkdir emptydir/1
address@hidden:~/ftp/foo$ mkdir emptydir/2
address@hidden:~/ftp/foo$ grep -r --include='*.am' -i ICONV emptydir
Segmentation fault

address@hidden:~/ftp/foo$ gdb grep
GNU gdb 6.8-debian
Copyright (C) 2008 Free Software Foundation, Inc.
License GPLv3+: GNU GPL version 3 or later
<http://gnu.org/licenses/gpl.html>
This is free software: you are free to change and redistribute it.
There is NO WARRANTY, to the extent permitted by law.  Type "show copying"
and "show warranty" for details.
This GDB was configured as "x86_64-linux-gnu"...
(gdb) run -r --include='*.am' -i ICONV emptydir
Starting program: /srv/data/home/g/gnu/gnusys/live/bin/grep -r
--include='*.am' -i ICONV emptydir

Program received signal SIGSEGV, Segmentation fault.
0x000000000040f180 in isdir1 (dir=0x7fff36bd26ca "emptydir", file=0x1e18afb
"1") at savedir.c:51
51      savedir.c: No such file or directory.
        in savedir.c
(gdb) bt
#0  0x000000000040f180 in isdir1 (dir=0x7fff36bd26ca "emptydir",
file=0x1e18afb "1") at savedir.c:51
#1  0x000000000040f2f5 in savedir (dir=<value optimized out>, name_size=22,
included_patterns=<value optimized out>, 
    excluded_patterns=0x0, excluded_directory_patterns=<value optimized out>)
at savedir.c:112
#2  0x00000000004068e9 in grepdir (dir=0x7fff36bd26ca "emptydir",
stats=0x6281e0) at main.c:1339
#3  0x0000000000405136 in grepfile (file=0x7fff36bd26ca "emptydir",
stats=0x6281e0) at main.c:1083
#4  0x0000000000405adc in main (argc=6, argv=0x7fff36bd0888) at main.c:2193
(gdb) 

address@hidden:~/ftp/foo$ grep --version
GNU grep 2.6.1

Copyright (C) 2009 Free Software Foundation, Inc.
License GPLv3+: GNU GPL version 3 or later
<http://gnu.org/licenses/gpl.html>
This is free software: you are free to change and redistribute it.
There is NO WARRANTY, to the extent permitted by law.





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