--SIfvHv0YxMfkVBn05d3
Content-Type: text/plain
Content-Transfer-Encoding: quoted-printable

Hi,

I'm having a problem w/ mod_xmlrpc segfaulting inside a call to
IO.popen.  The code snippet that's being run is:

cmd = 'sudo ' + PRIV + ' /usr/bin/apt-get -u --trivial-only dist-
upgrade'
skip = 2

f = IO.popen(cmd)
output = f.readlines



Here's the backtrace:

Program received signal SIGSEGV, Segmentation fault.
[Switching to Thread 1079499040 (LWP 14934)]
0x4063931e in st_lookup (table=0x0, key=321, value=0xbfff92b8) at
st.c:258
258         hash_val = do_hash(key, table);
(gdb) bt
#0  0x4063931e in st_lookup (table=0x0, key=321, value=0xbfff92b8) at
st.c:258
#1  0x405d5106 in search_method (klass=1085430708, id=321,
origin=0xbfff92e4)
    at eval.c:380
#2  0x405d5161 in rb_get_method_body (klassp=0xbfff9340, idp=0xbfff9324,
    noexp=0xbfff9328) at eval.c:401
#3  0x405e012e in rb_call (klass=1085430708, recv=1085430908, mid=321,
argc=1,
    argv=0xbfff9358, scope=0) at eval.c:5732
#4  0x405daccf in rb_eval (self=1086135396, n=0x0) at ruby.h:631
#5  0x405d96da in rb_eval (self=1086135396, n=0x0) at eval.c:2804
#6  0x405dfad2 in rb_call0 (klass=1086135376, recv=1086135396, id=10777,
    oid=0, argc=0, argv=0x0, body=0x40ac52c8, nosuper=0) at eval.c:5663
#7  0x405e01eb in rb_call (klass=1086135376, recv=1086135396, mid=10777,
    argc=0, argv=0x0, scope=0) at eval.c:5756
#8  0x405daccf in rb_eval (self=1086135336, n=0x0) at ruby.h:631
#9  0x405dfad2 in rb_call0 (klass=1086135176, recv=1086135336, id=10801,
    oid=0, argc=0, argv=0x0, body=0x40ac50c0, nosuper=0) at eval.c:5663
#10 0x405e01eb in rb_call (klass=1086135176, recv=1086135336, mid=10801,
    argc=0, argv=0x0, scope=0) at eval.c:5756
#11 0x405daccf in rb_eval (self=1085632956, n=0x0) at ruby.h:631
#12 0x405da5b1 in rb_eval (self=1085632956, n=0x0) at eval.c:3427
#13 0x405dfad2 in rb_call0 (klass=1085632936, recv=1085632956, id=22953,
    oid=0, argc=0, argv=0xbfffd2b8, body=0x40b60a50, nosuper=0) at
eval.c:5663
#14 0x405e01eb in rb_call (klass=1085632936, recv=1085632956, mid=22953,
---Type <return> to continue, or q <return> to quit---
    argc=2, argv=0xbfffd2b0, scope=1) at eval.c:5756
#15 0x405e060e in rb_funcall2 (recv=321, mid=0, argc=0, argv=0x0) at
ruby.h:631
#16 0x4001a875 in do_funcall (args=135795528)
    at /home/dilinger/src/modxmlrpc2--mainline--0--
patch-18/mod_xmlrpc_rb.c:73
#17 0x405df059 in rb_protect (proc=0x4001a800 <do_funcall>, data=0,
    state=0xbfffd4f8) at eval.c:5184
#18 0x4001a8f7 in protected_funcall2 (obj=0, method=2, err=0xbfffd4f8,
argc=2,
    args=0xbfffd4d4)
    at /home/dilinger/src/modxmlrpc2--mainline--0--
patch-18/mod_xmlrpc_rb.c:91
#19 0x4001b0ea in do_callback (env=0xbfffd580, param=0x8358188,
n=0x8272e90)
    at /home/dilinger/src/modxmlrpc2--mainline--0--
patch-18/mod_xmlrpc_rb.c:301
#20 0x405951de in xmlrpc_registry_set_default_method ()
   from /usr/lib/libxmlrpc.so.3
#21 0x405952b6 in xmlrpc_registry_process_call ()
from /usr/lib/libxmlrpc.so.3
#22 0x4001b96a in mod_xmlrpc_server_parse (registry=0x0, data=0x0,
len=0,
    r=0x0)
    at /home/dilinger/src/modxmlrpc2--mainline--0--
patch-18/mod_xmlrpc_server.c:47
#23 0x4001a0b1 in xmlrpc_handler (r=0x8322690)
    at /home/dilinger/src/modxmlrpc2--mainline--0--
patch-18/mod_xmlrpc.c:108
#24 0x080782c5 in ap_run_handler ()
#25 0x080f1918 in ?? ()
#26 0x08106080 in ?? ()
---Type <return> to continue, or q <return> to quit---
#27 0x08322690 in ?? ()
#28 0x08322690 in ?? ()
#29 0x00000000 in ?? ()
#30 0xbffff698 in ?? ()
#31 0x080788d0 in ap_invoke_handler ()
Previous frame inner to this frame (corrupt stack?)
(gdb)


It looks to me like the klass that's being passed to search_method()
doesn't have a valid m_tbl.  Here's the interpreter that I'm using; it's
an apache2 module that loads ruby scripts, and allows the ModXMLRPC
class methods to be called via xmlrpc:
http://www.acm.rpi.edu/~dilinger/modxmlrpc-snap.tar.gz

Any suggestions or tips on how to fix this would be appreciated.  I'm
not sure whether the culprit is something in ruby, or in mod_xmlrpc.

  

-- 
Andres Salomon <dilinger / voxel.net>

--SIfvHv0YxMfkVBn05d3
Content-Type: application/pgp-signature; name=signature.asc
Content-Description: This is a digitally signed message part

-----BEGIN PGP SIGNATURE-----
Version: GnuPG v1.2.5 (GNU/Linux)

iD8DBQBBWHMU78o9R9NraMQRAoNEAKCvglmfeArC3mFutiAeAe1LX3asyACfUitl
xpJ++945OieESjfiipcDU8o`b9
-----END PGP SIGNATURE-----

--SIfvHv0YxMfkVBn05d3--