httpd looping

[Rodrigo Werneck Silva <ro...@labhpardini.com.br>]

I've recently upgraded to Apache 1.3.22 compiled with PHP 4.1.1, Tomcat
3.2.4, mod_ssl 2.8.5, mod_weblink (broker for Intersystems Caché [MUMPS]),
mod_auth_external 2.1.13.
Now about a day after starting up apache some httpd processes seem to fall
into a tight loop consuming all CPU. After recompiling with -g debug
information and waiting for thee loop to be reached I got this backtrace
from gdb when attached to a looping httpd process:
#0  0x401cedf0 in chunk_free (ar_ptr=0x40277f00, p=0x8168310) at
malloc.c:3131
#1  0x401ced59 in __libc_free (mem=0x8168318) at malloc.c:3054
#2  0x404ccd12 in CRYPTO_free () from /usr/lib/libcrypto.so.1
#3  0x404e8d0f in bn_expand2 () from /usr/lib/libcrypto.so.1
#4  0x404e936b in BN_set_bit () from /usr/lib/libcrypto.so.1
#5  0x404f058c in BN_MONT_CTX_set () from /usr/lib/libcrypto.so.1
#6  0x404f1b31 in RSA_eay_mod_exp () from /usr/lib/libcrypto.so.1
#7  0x404f143e in RSA_eay_private_encrypt () from /usr/lib/libcrypto.so.1
#8  0x404f2630 in RSA_private_encrypt () from /usr/lib/libcrypto.so.1
#9  0x404f2b90 in RSA_sign () from /usr/lib/libcrypto.so.1
#10 0x4048c12f in ssl3_send_server_key_exchange () from /usr/lib/libssl.so.1
#11 0x4048adf1 in ssl3_accept () from /usr/lib/libssl.so.1
#12 0x40497bf0 in SSL_accept () from /usr/lib/libssl.so.1
#13 0x40494988 in ssl23_get_client_hello () from /usr/lib/libssl.so.1
#14 0x40494195 in ssl23_accept () from /usr/lib/libssl.so.1
#15 0x40497bf0 in SSL_accept () from /usr/lib/libssl.so.1
#16 0x4045a5bb in ssl_hook_NewConnection () from
/etc/httpd/modules/libssl.so
#17 0x0805f1af in new_connection () at eval.c:41
#18 0x08060122 in child_main () at eval.c:41
#19 0x0806040f in make_child () at eval.c:41
#20 0x0806078c in perform_idle_server_maintenance () at eval.c:41
#21 0x08060d65 in standalone_main () at eval.c:41
#22 0x080613b7 in main () at eval.c:41
#23 0x4016b177 in __libc_start_main (main=0x8060ffc <main>, argc=96,
    ubp_av=0xbffff41c, init=0x804eba4 <_init>, fini=0x80802c0 <_fini>,
    rtld_fini=0x4000e184 <_dl_fini>, stack_end=0xbffff40c)
    at ../sysdeps/generic/libc-start.c:129

I really don't know what to do next and I've searched a lot in Web for a
problem like that with no success. Any direction?
Thanks,
Rodrigo.


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