# \*\*\* glibc detected \*\*\* nginx:

**URL:** <https://www.ruby-forum.com/t/glibc-detected-nginx/162777>\
**Category:** NGINX\
**Created:** [March 13, 2009, 5:30pm UTC](https://www.ruby-forum.com/t/glibc-detected-nginx/162777 "2009-03-13T17:30:00Z")\
**Posts on this page:** 3\
**Page:** 1

<div class="post-metadata">

**Author:** ![ilovenginx](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/i/bbce88/32.png) [@ilovenginx](https://www.ruby-forum.com/u/ilovenginx)\
**Post date:** [March 13, 2009, 5:30pm UTC](https://www.ruby-forum.com/t/glibc-detected-nginx/162777/1 "2009-03-13T17:30:00Z")

</div>

I’m getting the following dump sporadically while using nginx for  
smtp/tls.  
I saw a patch Igor posted in 2007 to what looked like a similar error.  
Anyone here run into this issue ?

\*\*\* glibc detected \*\*\* nginx: worker process: free(): invalid pointer:  
0x080ee084 \*\*\*  
======= Backtrace: =========  
/lib/tls/i686/nosegneg/libc.so.6[0xb7c72495]  
/lib/tls/i686/nosegneg/libc.so.6(cfree+0x90)[0xb7c75f70]  
nginx: worker process[0x805901f]  
nginx: worker process[0x805984e]  
nginx: worker process[0x80963ac]  
nginx: worker process[0x809262a]  
nginx: worker process[0x8092939]  
nginx: worker process[0x805e23d]  
nginx: worker process[0x805d726]  
nginx: worker process[0x805d5b4]  
nginx: worker process[0x8062aa5]  
nginx: worker process[0x8061581]  
nginx: worker process[0x80631ae]  
nginx: worker process[0x804c784]  
/lib/tls/i686/nosegneg/libc.so.6(\_\_libc\_start\_main+0xe0)[0xb7c1c450]  
nginx: worker process[0x804b501]  
======= Memory map: ========  
08048000-080a3000 r-xp 00000000 08:01 155795  
/usr/local/nginx/sbin/nginx  
080a3000-080ab000 rw-p 0005b000 08:01 155795  
/usr/local/nginx/sbin/nginx  
080ab000-08185000 rw-p 080ab000 00:00 0 [heap]  
b7a00000-b7a21000 rw-p b7a00000 00:00 0  
b7a21000-b7b00000 —p b7a21000 00:00 0  
b7bbb000-b7bc5000 r-xp 00000000 08:01 188614 /lib/libgcc\_s.so.1  
b7bc5000-b7bc6000 rw-p 0000a000 08:01 188614 /lib/libgcc\_s.so.1  
b7bca000-b7bd3000 r-xp 00000000 08:01 189055  
/lib/tls/i686/nosegneg/libnss\_files-2.7.so  
b7bd3000-b7bd5000 rw-p 00008000 08:01 189055  
/lib/tls/i686/nosegneg/libnss\_files-2.7.so  
b7bd5000-b7bdd000 r-xp 00000000 08:01 189057  
/lib/tls/i686/nosegneg/libnss\_nis-2.7.so  
b7bdd000-b7bdf000 rw-p 00007000 08:01 189057  
/lib/tls/i686/nosegneg/libnss\_nis-2.7.so  
b7bdf000-b7bf3000 r-xp 00000000 08:01 189052  
/lib/tls/i686/nosegneg/libnsl-2.7.so  
b7bf3000-b7bf5000 rw-p 00013000 08:01 189052  
/lib/tls/i686/nosegneg/libnsl-2.7.so  
b7bf5000-b7bf7000 rw-p b7bf5000 00:00 0  
b7bf7000-b7bfe000 r-xp 00000000 08:01 189053  
/lib/tls/i686/nosegneg/libnss\_compat-2.7.so  
b7bfe000-b7c00000 rw-p 00006000 08:01 189053  
/lib/tls/i686/nosegneg/libnss\_compat-2.7.so  
b7c00000-b7c02000 rw-p b7c00000 00:00 0  
b7c02000-b7c04000 r-xp 00000000 08:01 189049  
/lib/tls/i686/nosegneg/libdl-2.7.so  
b7c04000-b7c06000 rw-p 00001000 08:01 189049  
/lib/tls/i686/nosegneg/libdl-2.7.so  
b7c06000-b7d52000 r-xp 00000000 08:01 189046  
/lib/tls/i686/nosegneg/libc-2.7.so  
b7d52000-b7d53000 r–p 0014c000 08:01 189046  
/lib/tls/i686/nosegneg/libc-2.7.so  
b7d53000-b7d55000 rw-p 0014d000 08:01 189046  
/lib/tls/i686/nosegneg/libc-2.7.so  
b7d55000-b7d58000 rw-p b7d55000 00:00 0  
b7d58000-b7d6c000 r-xp 00000000 08:01 68110  
/usr/lib/libz.so.1.2.3.3  
b7d6c000-b7d6d000 rw-p 00013000 08:01 68110  
/usr/lib/libz.so.1.2.3.3  
b7d6d000-b7e97000 r-xp 00000000 08:01 68635  
/usr/lib/i686/cmov/libcrypto.so.0.9.8  
b7e97000-b7eac000 rw-p 00129000 08:01 68635  
/usr/lib/i686/cmov/libcrypto.so.0.9.8  
b7eac000-b7eaf000 rw-p b7eac000 00:00 0  
b7eaf000-b7eed000 r-xp 00000000 08:01 68636  
/usr/lib/i686/cmov/libssl.so.0.9.8  
b7eed000-b7ef1000 rw-p 0003d000 08:01 68636  
/usr/lib/i686/cmov/libssl.so.0.9.8  
b7ef1000-b7ef2000 rw-p b7ef1000 00:00 0  
b7ef2000-b7f18000 r-xp 00000000 08:01 68610  
/usr/lib/libpcre.so.3.12.1  
b7f18000-b7f19000 rw-p 00026000 08:01 68610  
/usr/lib/libpcre.so.3.12.1  
b7f19000-b7f22000 r-xp 00000000 08:01 189048  
/lib/tls/i686/nosegneg/libcrypt-2.7.so  
b7f22000-b7f24000 rw-p 00008000 08:01 189048  
/lib/tls/i686/nosegneg/libcrypt-2.7.so  
b7f24000-b7f4b000 rw-p b7f24000 00:00 0  
b7f4e000-b7f4f000 rw-s 00000000 00:07 2387700 /dev/zero (deleted)  
b7f4f000-b7f51000 rw-p b7f4f000 00:00 0  
b7f51000-b7f6b000 r-xp 00000000 08:01 188592 /lib/ld-2.7.so  
b7f6b000-b7f6d000 rw-p 00019000 08:01 188592 /lib/ld-2.7.so  
bf952000-bf968000 rw-p bf952000 00:00 0 [stack]  
bfffe000-bffff000 r-xp bfffe000 00:00 0  
2009/03/13 16:19:09 [alert] 2893#0: worker process 8536 exited on signal  
6

---

<div class="post-metadata">

**Author:** ![ilovenginx](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/i/bbce88/32.png) [@ilovenginx](https://www.ruby-forum.com/u/ilovenginx)\
**Post date:** [March 13, 2009, 5:36pm UTC](https://www.ruby-forum.com/t/glibc-detected-nginx/162777/2 "2009-03-13T17:36:46Z")

</div>

nginx version: nginx/0.6.35  
–with-mail --with-mail\_ssl\_module --with-http\_ssl\_module  
–without-http\_geo\_module --without-http\_fastcgi\_module  
–without-http\_memcached\_module

Thanks

---

<div class="post-metadata">

**Author:** ![ilovenginx](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/i/bbce88/32.png) [@ilovenginx](https://www.ruby-forum.com/u/ilovenginx)\
**Post date:** [March 13, 2009, 5:46pm UTC](https://www.ruby-forum.com/t/glibc-detected-nginx/162777/3 "2009-03-13T17:46:18Z")

</div>

Think I found a fix while reading through the change log of the dev  
version

Changes with nginx 0.7.33 02 Feb  
2009

```
*) Bugfix: a segmentation fault might occur in worker process if
   "resolver" directive was used in SMTP proxy.

```

I remove the resolver directive since it was not needed and that fixed  
it.