# Double free or corruption

**URL:** <https://www.ruby-forum.com/t/double-free-or-corruption/211726>\
**Category:** NGINX\
**Created:** [September 12, 2011, 4:23pm UTC](https://www.ruby-forum.com/t/double-free-or-corruption/211726 "2011-09-12T16:23:03Z")\
**Posts on this page:** 1\
**Page:** 1

<div class="post-metadata">

**Author:** ![luislavena](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/l/0ea827/32.png) [@luislavena](https://www.ruby-forum.com/u/luislavena)\
**Post date:** [September 12, 2011, 4:23pm UTC](https://www.ruby-forum.com/t/double-free-or-corruption/211726/1 "2011-09-12T16:23:03Z")

</div>

Hello,

after start nginx error.log contains :

\*\*\* glibc detected \*\*\* nginx: master process /usr/local/nginx/sbin/nginx  
-c /usr/local/nginx/conf/nginx.conf: double free or corruption (out):  
0x09f24128 \*\*\*  
======= Backtrace: =========  
/lib/libc.so.6[0x5f46c5]  
/lib/libc.so.6(cfree+0x59)[0x5f4b09]  
nginx: master process /usr/local/nginx/sbin/nginx -c  
/usr/local/nginx/conf/nginx.conf[0x80cfdc7]  
[0x9f17ec0]  
======= Memory map: ========  
002d9000-002da000 r-xp 002d9000 00:00 0 [vdso]  
00352000-00353000 rwxp 00352000 00:00 0  
00539000-00554000 r-xp 00000000 fd:00 950349 /lib/ld-2.5.so  
00554000-00555000 r-xp 0001a000 fd:00 950349 /lib/ld-2.5.so  
00555000-00556000 rwxp 0001b000 fd:00 950349 /lib/ld-2.5.so  
00583000-00586000 r-xp 00000000 fd:00 953074 /lib/libdl-2.5.so  
00586000-00587000 r-xp 00002000 fd:00 953074 /lib/libdl-2.5.so  
00587000-00588000 rwxp 00003000 fd:00 953074 /lib/libdl-2.5.so  
0058b000-006de000 r-xp 00000000 fd:00 950482 /lib/libc-2.5.so  
006de000-006e0000 r-xp 00153000 fd:00 950482 /lib/libc-2.5.so  
006e0000-006e1000 rwxp 00155000 fd:00 950482 /lib/libc-2.5.so  
006e1000-006e4000 rwxp 006e1000 00:00 0  
006e6000-006fb000 r-xp 00000000 fd:00 953068 /lib/libpthread-2.5.so  
006fb000-006fc000 r-xp 00015000 fd:00 953068 /lib/libpthread-2.5.so  
006fc000-006fd000 rwxp 00016000 fd:00 953068 /lib/libpthread-2.5.so  
006fd000-006ff000 rwxp 006fd000 00:00 0  
00701000-00713000 r-xp 00000000 fd:00 498522 /usr/lib/libz.so.1.2.3  
00713000-00714000 rwxp 00011000 fd:00 498522 /usr/lib/libz.so.1.2.3  
0075c000-0077b000 r-xp 00000000 fd:00 950493 /lib/libpcre.so.0.0.1  
0077b000-0077c000 rwxp 0001e000 fd:00 950493 /lib/libpcre.so.0.0.1  
00888000-00889000 rwxp 00888000 00:00 0  
009a8000-009a9000 rwxp 009a8000 00:00 0  
00b24000-00b2e000 r-xp 00000000 fd:00 951090  
/lib/libnss\_files-2.5.so  
00b2e000-00b2f000 r-xp 00009000 fd:00 951090  
/lib/libnss\_files-2.5.so  
00b2f000-00b30000 rwxp 0000a000 fd:00 951090  
/lib/libnss\_files-2.5.so  
00bb9000-00bba000 rwxs 00000000 00:09 17874 /dev/zero (deleted)  
03248000-03253000 r-xp 00000000 fd:00 951429  
/lib/libgcc\_s-4.1.2-20080825.so.1  
03253000-03254000 rwxp 0000a000 fd:00 951429  
/lib/libgcc\_s-4.1.2-20080825.so.1  
035fd000-03606000 r-xp 00000000 fd:00 953152 /lib/libcrypt-2.5.so  
03606000-03607000 r-xp 00008000 fd:00 953152 /lib/libcrypt-2.5.so  
03607000-03608000 rwxp 00009000 fd:00 953152 /lib/libcrypt-2.5.so  
03608000-0362f000 rwxp 03608000 00:00 0  
08048000-081ee000 r-xp 00000000 fd:00 527526  
/usr/local/nginx/sbin/nginx  
081ee000-081ff000 rwxp 001a5000 fd:00 527526  
/usr/local/nginx/sbin/nginx  
081ff000-0820d000 rwxp 081ff000 00:00 0  
09f14000-09f58000 rwxp 09f14000 00:00 0 [heap]  
bfebc000-bfed1000 rwxp bffe9000 00:00 0 [stack]

nginx working.

CentOS 5.6 x86\_64 kernel 2.6.18-238.19.1.el5PAE,

/usr/local/nginx/sbin/nginx -V  
nginx: nginx version: nginx/1.0.6  
nginx: built by gcc 4.1.2 20080704 (Red Hat 4.1.2-50)  
nginx: TLS SNI support enabled  
nginx: configure arguments: --with-http\_stub\_status\_module  
–with-http\_ssl\_module  
–with-openssl=/root/src/Apache/Apache2/openssl-1.0.0d

Thanks,

Libor

Posted at Nginx Forum:

> **[Double free or corruption](https://forum.nginx.org/read.php?2,215119,215119#msg-215119)**
>
> Hello, after start nginx error.log contains : \*\*\* glibc detected \*\*\* nginx: master process /usr/local/nginx/sbin/nginx -c /usr/local/nginx/conf/nginx.conf: double free or corruption (out): 0x09f24128 \*\*\* ======= Backtrace: =========...