nginx core dump　issue

Tue Oct 21 07:54:21 UTC 2014

Hi expert,

I am running into nginx core dump issue and I need expert's help.
Thank you so much!

We are running nginx 1.6.0 + mod_security on RHEL 6.4.
We are using the two ports with https.

■core dump
GNU gdb (GDB) Red Hat Enterprise Linux (7.2-60.el6_4.1)
Copyright (C) 2010 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-redhat-linux-gnu".
For bug reporting instructions, please see:
<http://www.gnu.org/software/gdb/bugs/>...
Reading symbols from /usr/sbin/nginx.debug...done.

warning: core file may not match specified executable file.
[New Thread 28081]
Missing separate debuginfo for
Try: yum --disablerepo='*' --enablerepo='*-debug*' install
/usr/lib/debug/.build-id/a6/993d9af0d108bfc4a2bbfdb176ea3288f6fd5c
#0  ngx_http_chunked_body_filter (r=0x1811350, in=<value optimized out>) at
src/http/modules/ngx_http_chunked_filter_module.c:126
126             size += ngx_buf_size(cl->buf);
Missing separate debuginfos, use: debuginfo-install apr-1.3.9-5.el6_2.x86_64
apr-util-1.3.9-3.el6_0.1.x86_64 cyrus-sasl-lib-2.1.23-13.el6_3.1.x86_64
db4-4.7.25-17.el6.x86_64 db4-4.7.25-18.el6_4.x86_64
expat-2.0.1-11.el6_2.x86_64 glibc-2.12-1.107.el6.x86_64
glibc-2.12-1.132.el6.x86_64 keyutils-libs-1.4-4.el6.x86_64
krb5-libs-1.10.3-10.el6.x86_64 krb5-libs-1.10.3-10.el6_4.6.x86_64
libcom_err-1.41.12-14.el6.x86_64 libcom_err-1.41.12-18.el6.x86_64
libcurl-7.19.7-35.el6.x86_64 libcurl-7.19.7-37.el6_4.x86_64
libidn-1.18-2.el6.x86_64 libselinux-2.0.94-5.3.el6.x86_64
libselinux-2.0.94-5.3.el6_4.1.x86_64 libssh2-1.4.2-1.el6.x86_64
libuuid-2.17.2-12.14.el6.x86_64 libxml2-2.7.6-14.el6.x86_64
libxml2-2.7.6-8.el6_3.4.x86_64 nspr-4.10.2-1.el6_5.x86_64
nspr-4.9.2-1.el6.x86_64 nss-3.14.0.0-12.el6.x86_64 nss-3.15.3-3.el6_5.x86_64
nss-softokn-freebl-3.12.9-11.el6.x86_64
nss-softokn-freebl-3.14.3-9.el6.x86_64 nss-util-3.14.0.0-2.el6.x86_64
nss-util-3.15.3-1.el6_5.x86_64 openldap-2.4.23-32.el6_4.1.x86_64
openssl-1.0.0-27.el6.x86_64 openssl-1.0.1e-16.el6_5.1.x86_64
pcre-7.8-6.el6.x86_64 zlib-1.2.3-29.el6.x86_64
(gdb) bt
#0  ngx_http_chunked_body_filter (r=0x1811350, in=<value optimized out>) at
src/http/modules/ngx_http_chunked_filter_module.c:126
#1  0x0000000000463114 in ngx_http_gzip_body_filter (r=0x1811350,
in=0x2171b38) at src/http/modules/ngx_http_gzip_filter_module.c:325
#2  0x00000000004665cc in ngx_http_ssi_body_filter (r=<value optimized out>,
in=<value optimized out>) at
src/http/modules/ngx_http_ssi_filter_module.c:444
#3  0x0000000000469c73 in ngx_http_charset_body_filter (r=0x1811350,
in=<value optimized out>) at
src/http/modules/ngx_http_charset_filter_module.c:643
#4  0x000000000046b5cf in ngx_http_addition_body_filter (r=0x1811350,
in=0x2171b38) at src/http/modules/ngx_http_addition_filter_module.c:166
#5  0x000000000046be2c in ngx_http_gunzip_body_filter (r=0x1811350,
in=0x2171b38) at src/http/modules/ngx_http_gunzip_filter_module.c:184
#6  0x000000000049b83e in ngx_http_modsecurity_body_filter (r=<value
optimized out>, in=<value optimized out>)
    at
/home/odnsys777/rpmbuild/BUILD/nginx-1.6.0/modsecurity-2.8.0/nginx/modsecurity/ngx_http_modsecurity.c:1209
#7  0x000000000040fd81 in ngx_output_chain (ctx=0x21717c0,
in=0x7fff6190f850) at src/core/ngx_output_chain.c:66
#8  0x0000000000449f25 in ngx_http_copy_filter (r=0x1811350,
in=0x7fff6190f850) at src/http/ngx_http_copy_filter_module.c:143
#9  0x000000000045d686 in ngx_http_range_body_filter (r=0x1811350,
in=0x7fff6190f850) at src/http/modules/ngx_http_range_filter_module.c:594
#10 0x000000000043b0b5 in ngx_http_output_filter (r=0x1811350,
in=0x7fff6190f850) at src/http/ngx_http_core_module.c:1964
#11 0x00000000004410fd in ngx_http_send_special (r=0x1811350, flags=<value
optimized out>) at src/http/ngx_http_request.c:3332
#12 0x0000000000454a9d in ngx_http_upstream_finalize_request (r=0x1811350,
u=0x2127ee0, rc=0) at src/http/ngx_http_upstream.c:3551
#13 0x000000000045551d in ngx_http_upstream_process_request (r=0x1811350) at
src/http/ngx_http_upstream.c:3159
#14 0x0000000000459e69 in ngx_http_upstream_send_response (r=0x1811350,
u=0x2127ee0) at src/http/ngx_http_upstream.c:2493
#15 ngx_http_upstream_process_header (r=0x1811350, u=0x2127ee0) at
src/http/ngx_http_upstream.c:1735
#16 0x000000000045517d in ngx_http_upstream_handler (ev=0x2139a38) at
src/http/ngx_http_upstream.c:977
#17 0x0000000000425194 in ngx_event_process_posted (cycle=0x1804f80,
posted=0x76ed40) at src/event/ngx_event_posted.c:40
#18 0x000000000042c2b5 in ngx_worker_process_cycle (cycle=0x1804f80,
data=<value optimized out>) at src/os/unix/ngx_process_cycle.c:816
#19 0x000000000042a784 in ngx_spawn_process (cycle=0x1804f80, proc=0x42c1e0
<ngx_worker_process_cycle>, data=0x1, name=0x4e5356 "worker process",
respawn=-3)
    at src/os/unix/ngx_process.c:198
#20 0x000000000042c44c in ngx_start_worker_processes (cycle=0x1804f80, n=4,
type=-3) at src/os/unix/ngx_process_cycle.c:364
#21 0x000000000042cc74 in ngx_master_process_cycle (cycle=0x1804f80) at
src/os/unix/ngx_process_cycle.c:136
#22 0x000000000040c4c6 in main (argc=<value optimized out>, argv=<value
optimized out>) at src/core/nginx.c:407
(gdb)

Posted at Nginx Forum: http://forum.nginx.org/read.php?2,254183,254183#msg-254183