1.15.3 nginx core dumps -- with proxy_pass http://127.0.0.1:8080

Sun Sep 23 18:37:17 UTC 2018

Any help much appreciated. This is my last closure step to move from apache
to nginx (using tomcat with proxy_pass.) Thanks in advance!

curl -v http://localhost:8080  or  curl -v http://127.0.0.1:8080  work. If I
remove proxy_pass statement, it works but goes to normal index.html

/usr/local/nginx/sbin/nginx -V
nginx version: nginx/1.15.3
built by gcc 4.8.5 20150623 (Red Hat 4.8.5-28) (GCC)
built with OpenSSL 1.1.0i  14 Aug 2018
TLS SNI support enabled
configure arguments: --add-module=../modsecurity-2.9.2/nginx/modsecurity
--with-cc-opt=-fno-optimize-sibling-calls

Here is the core dump

[Thread debugging using libthread_db enabled]
Using host libthread_db library "/lib64/libthread_db.so.1".
Core was generated by `nginx: worker process      '.
Program terminated with signal 11, Segmentation fault.
#0  ngx_http_upstream_copy_allow_ranges (r=0xad66d0, h=0x7ffc3003a970,
offset=<optimized out>) at src/http/ngx_http_upstream.c:5176
5176        if (r->upstream->conf->force_ranges) {
Missing separate debuginfos, use: debuginfo-install
GeoIP-1.5.0-11.el7.x86_64 apr-1.4.8-3.el7_4.1.x86_64
apr-util-1.5.2-6.el7.x86_64 expat-2.1.0-10.el7_3.x86_64
glibc-2.17-222.el7.x86_64 libdb-5.3.21-24.el7.x86_64
libuuid-2.23.2-52.el7_5.1.x86_64 libxml2-2.9.1-6.el7_2.3.x86_64
nss-softokn-freebl-3.36.0-5.el7_5.x86_64 pcre-8.32-17.el7.x86_64
xz-libs-5.2.2-1.el7.x86_64 zlib-1.2.7-17.el7.x86_64
(gdb) backtrace
#0  ngx_http_upstream_copy_allow_ranges (r=0xad66d0, h=0x7ffc3003a970,
offset=<optimized out>) at src/http/ngx_http_upstream.c:5176
#1  0x00000000004c5f66 in ngx_http_modsecurity_save_headers_out_visitor
(data=0xad66d0, key=<optimized out>, value=<optimized out>)
    at ../modsecurity-2.9.2/nginx/modsecurity/ngx_http_modsecurity.c:795
#2  0x00007fd2b216c1ad in apr_table_vdo () from /lib64/libapr-1.so.0
#3  0x00007fd2b216c26f in apr_table_do () from /lib64/libapr-1.so.0
#4  0x00000000004c7898 in ngx_http_modsecurity_save_headers_out
(r=0xad66d0)
    at ../modsecurity-2.9.2/nginx/modsecurity/ngx_http_modsecurity.c:737
#5  ngx_http_modsecurity_body_filter (r=<optimized out>, in=<optimized
out>)
    at ../modsecurity-2.9.2/nginx/modsecurity/ngx_http_modsecurity.c:1220
#6  0x000000000045843a in ngx_output_chain (ctx=ctx at entry=0xad8520,
in=in at entry=0x7ffc3003ad00) at src/core/ngx_output_chain.c:74
#7  0x00000000004b15ad in ngx_http_copy_filter (r=0xad66d0,
in=0x7ffc3003ad00) at src/http/ngx_http_copy_filter_module.c:152
#8  0x00000000004a8863 in ngx_http_range_body_filter (r=0xad66d0,
in=<optimized out>)
    at src/http/modules/ngx_http_range_filter_module.c:635
#9  0x0000000000489360 in ngx_http_output_filter (r=r at entry=0xad66d0,
in=in at entry=0x7ffc3003ad00)
    at src/http/ngx_http_core_module.c:1770
#10 0x000000000048ca94 in ngx_http_send_special (r=r at entry=0xad66d0,
flags=flags at entry=1) at src/http/ngx_http_request.c:3386
#11 0x000000000049bf13 in ngx_http_upstream_finalize_request
(r=r at entry=0xad66d0, u=u at entry=0xad7a70, rc=<optimized out>, rc at entry=0)
    at src/http/ngx_http_upstream.c:4436
#12 0x000000000049cc0d in ngx_http_upstream_process_request
(r=r at entry=0xad66d0, u=u at entry=0xad7a70)
    at src/http/ngx_http_upstream.c:4007
#13 0x000000000049cdd1 in ngx_http_upstream_process_upstream
(r=r at entry=0xad66d0, u=u at entry=0xad7a70)
    at src/http/ngx_http_upstream.c:3919
#14 0x000000000049e8cd in ngx_http_upstream_send_response (u=0xad7a70,
r=0xad66d0) at src/http/ngx_http_upstream.c:3232
#15 ngx_http_upstream_process_header (r=0xad66d0, u=0xad7a70) at
src/http/ngx_http_upstream.c:2429
#16 0x000000000049bf92 in ngx_http_upstream_handler (ev=<optimized out>) at
src/http/ngx_http_upstream.c:1281
#17 0x000000000047a914 in ngx_epoll_process_events (cycle=<optimized out>,
timer=<optimized out>, flags=<optimized out>)
    at src/event/modules/ngx_epoll_module.c:902
#18 0x0000000000471e39 in ngx_process_events_and_timers
(cycle=cycle at entry=0xad26c0) at src/event/ngx_event.c:242
#19 0x0000000000478cf4 in ngx_worker_process_cycle (cycle=0xad26c0,
data=<optimized out>) at src/os/unix/ngx_process_cycle.c:750
#20 0x0000000000477432 in ngx_spawn_process (cycle=cycle at entry=0xad26c0,
proc=proc at entry=0x478c83 <ngx_worker_process_cycle>,
    data=data at entry=0x0, name=name at entry=0x6a9fe5 "worker process",
respawn=respawn at entry=-3) at src/os/unix/ngx_process.c:199
#21 0x0000000000477fbb in ngx_start_worker_processes
(cycle=cycle at entry=0xad26c0, n=1, type=type at entry=-3)
    at src/os/unix/ngx_process_cycle.c:359
#22 0x00000000004793f1 in ngx_master_process_cycle
(cycle=cycle at entry=0xad26c0) at src/os/unix/ngx_process_cycle.c:131
#23 0x00000000004548e5 in main (argc=<optimized out>, argv=<optimized out>)
at src/core/nginx.c:382
(gdb)

Posted at Nginx Forum: https://forum.nginx.org/read.php?2,281362,281362#msg-281362