xfsamba4 crashes on start

edscott wilson garcia edscott at xfce.org
Mon Jun 28 17:48:45 CEST 2004 

El lun, 28-06-2004 a las 02:52, Rabin K Patra escribió:
> Hi all,
> I looked around a little bit to see why my xfsamba4 crashes on start and 
> this is what I found.
> 
> Inside the package xffm-4.0.5:
> File src/add_node_contents.c:180 calls qsort with the compare function 
> 'gdir_compare'.
> The list to be sorted is 'gdir', and it is a list('gdir->gl') of tree 
> entries.
> However, the name of the first entry in this list (gdir->gl[0].pathv) 
> seems to be NULL. This causes a crash later when gdir_compare is calls 
> strcmp or strchr on gdir->gl[0].pathv.
> What I cannot figure out is where the first tree entry gets this NULL 
> pointer.

Please from command line do a 
"nmblookup -M -- -" 

follow that with (ip is the address for the first server, returned from
previous command):
"nmblookup -A ip"

and then (server is the server name corresponding to ip address,
returned from previous command):
"smbclient -L server" 

and send us the output. xfsamba parses this output to generate the gdir,
and must be screwing up the parse for some reason.

Edscott


> 
> Thanks,
> -Rabin
> 
> 
> 
> Here is my gdb session: with the values of the 'gdir' list (showing the 
> NULL name)
> 
> Starting program: /opt/local/bin/xfsamba4
> [Thread debugging using libthread_db enabled]
> [New Thread -1084499936 (LWP 16895)]
> Detaching after fork from child process 16898.
> Detaching after fork from child process 16899.
> Detaching after fork from child process 16900.
> Detaching after fork from child process 16901.
> Detaching after fork from child process 16902.
> 
> Program received signal SIGSEGV, Segmentation fault.
> [Switching to Thread -1084499936 (LWP 16895)]
> 0x003a0b83 in strrchr () from /lib/tls/libc.so.6
> (gdb) bt
> #0  0x003a0b83 in strrchr () from /lib/tls/libc.so.6
> #1  0x0076d26d in gdir_sort_type () from /usr/lib/libxffm.so.0
> #2  0x0076d3c0 in gdir_compare () from /usr/lib/libxffm.so.0
> #3  0x00362fd0 in msort_with_tmp () from /lib/tls/libc.so.6
> #4  0x00362f30 in msort_with_tmp () from /lib/tls/libc.so.6
> #5  0x003631f8 in qsort () from /lib/tls/libc.so.6
> #6  0x08052516 in add_node_contents (treeview=0x9735d50, iter=0xbfe7e040,
>     gdir=0x758450) at add_node_contents.c:188
> #7  0x00754321 in NMBmastersLookup () from /usr/lib/libxffmsmb.so.0
> #8  0x00757648 in open_smb () from /usr/lib/libxffmsmb.so.0
> #9  0x08062247 in open_dir (treeview=0x9735d50, iter=0x99fae10,
>     treepath=0x99fada0, user_data=0x9735d50) at callbacks.c:279
> #10 0x00a3ef85 in gtk_marshal_VOID__UINT_STRING ()
>    from /usr/lib/libgtk-x11-2.0.so.0
> #11 0x007fd160 in g_closure_invoke () from /usr/lib/libgobject-2.0.so.0
> #12 0x00811195 in g_signal_emit_by_name () from /usr/lib/libgobject-2.0.so.0
> #13 0x00810157 in g_signal_emit_valist () from /usr/lib/libgobject-2.0.so.0
> #14 0x00810454 in g_signal_emit () from /usr/lib/libgobject-2.0.so.0
> #15 0x00b203ab in gtk_tree_view_expand_to_path () from 
> /usr/lib/libgtk-x11-2.0.so.0
> #16 0x00b2058e in gtk_tree_view_expand_row () from 
> /usr/lib/libgtk-x11-2.0.so.0
> #17 0x08067651 in init_xffm (argc=1, argv=0xbfe7e630) at treeview.c:1561
> #18 0x08067c1a in main (argc=1, argv=0xbfe7e914) at main.c:239
> (gdb) f 6
> #6  0x08052516 in add_node_contents (treeview=0x9735d50, iter=0xbfe7e040,
>     gdir=0x758450) at add_node_contents.c:188
> 188             qsort((void *)gdir->gl, gdir->pathc, sizeof(dir_t), 
> gdir_compare);
> 
> 
> 
> 
> 
> 
> (gdb) print *(gdir->gl + 0)
> $1 = {pathv = 0x0, en = 0x9a17d40}
> (gdb) print *(gdir->gl + 0)->en
> $2 = {type = 1124106256, subtype = 1, count = -1, st = 0x9a19860, tag = 0x0,
>   path = 0x9a19518 "//TIER", filter = 0x9746098 "*", checksum = 
> 6756141612728,
>   load_time = 0}
> (gdb) print *(gdir->gl + 1)
> $3 = {pathv = 0x9a19508 "WORKGROUP", en = 0x9a19810}
> (gdb) print *(gdir->gl + 1)->en
> $4 = {type = 1124106256, subtype = 1, count = -1, st = 0x9a19528, tag = 0x0,
>   path = 0x9a199c8 "//GNU", filter = 0x99f6ea0 "*", checksum = 
> 6004522325680,
>   load_time = 0}
> (gdb) print *(gdir->gl + 2)
> $5 = {pathv = 0x9a17d80 "MDKGROUP", en = 0x9a17c50}
> (gdb) print *(gdir->gl + 2)->en
> $6 = {type = 1124106256, subtype = 1, count = -1, st = 0x9a19758, tag = 0x0,
>   path = 0x9a17d70 "//DARKSEID", filter = 0x9a09230 "*", checksum = 
> 6004522319432,
>   load_time = 0}
> 
> 
> > Hi all,
> > xfsamba4 always crashes on me when I start it in my office network.
> > This happens after about 10 seconds of what seems like a lot of 
> > scanning(which must be normal).
> > I can try to dig a little more to find out more information .. but I 
> > dont know what to look for.
> >
> > Thanks,
> > -Rabin
> >
> > My system configuration:
> > Fedora Core 2(standard), glibc-2.3.3, gtk2-2.4.0
> > btw, I had this problem with Fedora Core 1 as well.
> > xfce4-4.0.4-1
> > xffm-4.0.5-1
> >
> >
> > Here is the gdb trace from running "gdb xfsamba4" ,run, bt:
> > Starting program: /usr/bin/xfsamba4
> > (no debugging symbols found).. ....[Thread debugging using 
> > libthread_db enabled]
> > [New Thread -1084394368 (LWP 1791)]
> > (no debugging symbols found).......Detaching after fork from child 
> > process 1794.
> > Detaching after fork from child process 1797.
> > Detaching after fork from child process 1806.
> > Detaching after fork from child process 1818.
> > Detaching after fork from child process 1822.
> >
> > Program received signal SIGSEGV, Segmentation fault.
> > [Switching to Thread -1084394368 (LWP 1791)]
> > 0x003a0b83 in strrchr () from /lib/tls/libc.so.6
> > (gdb) bt
> > #0  0x003a0b83 in strrchr () from /lib/tls/libc.so.6
> > #1  0x0076d26d in gdir_sort_type () from /usr/lib/libxffm.so.0
> > #2  0x0076d3c0 in gdir_compare () from /usr/lib/libxffm.so.0
> > #3  0x00362fd0 in msort_with_tmp () from /lib/tls/libc.so.6
> > #4  0x00362f30 in msort_with_tmp () from /lib/tls/libc.so.6
> > #5  0x003631f8 in qsort () from /lib/tls/libc.so.6
> > #6  0x080529ad in add_node_contents ()
> > #7  0x00754321 in NMBmastersLookup () from /usr/lib/libxffmsmb.so.0
> > #8  0x00757648 in open_smb () from /usr/lib/libxffmsmb.so.0
> > #9  0x08067e5c in open_dir ()
> > #10 0x00a3ef85 in gtk_marshal_VOID__UINT_STRING ()
> >  from /usr/lib/libgtk-x11-2.0.so.0
> > #11 0x007fd160 in g_closure_invoke () from /usr/lib/libgobject-2.0.so.0
> > #12 0x00811195 in g_signal_emit_by_name () from 
> > /usr/lib/libgobject-2.0.so.0
> > #13 0x00810157 in g_signal_emit_valist () from 
> > /usr/lib/libgobject-2.0.so.0
> > #14 0x00810454 in g_signal_emit () from /usr/lib/libgobject-2.0.so.0
> > #15 0x00b203ab in gtk_tree_view_expand_to_path () from 
> > /usr/lib/libgtk-x11-2.0.so.0
> > #16 0x00b2058e in gtk_tree_view_expand_row () from 
> > /usr/lib/libgtk-x11-2.0.so.0
> > #17 0x0806e389 in init_xffm ()
> > #18 0x09bf7260 in ?? ()
> > #19 0x00000000 in ?? ()
> 
> 
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