[Bug 61028] New: mod_fcgid extensive memory allocations causes OOM

[b***@apache.org]

https://bz.apache.org/bugzilla/show_bug.cgi?id=61028

Bug ID: 61028
Summary: mod_fcgid extensive memory allocations causes OOM
Product: Apache httpd-2
Version: 2.4.6
Hardware: PC
OS: Linux
Status: NEW
Severity: normal
Priority: P2
Component: mod_fcgid
Assignee: ***@httpd.apache.org
Reporter: ***@centrum.cz
Target Milestone: ---

Created attachment 34942
--> https://bz.apache.org/bugzilla/attachment.cgi?id=34942&action=edit
Core dump backtrace

OS: CentOS 7.3.1611
Package: mod_fcgid-2.3.9-4.el7.x86_64
Error:
[ 8677.328169] Out of memory: Kill process 3314 (httpd) score 844 or sacrifice
child
[ 8677.333848] Killed process 3314 (httpd) total-vm:836236kB,
anon-rss:421320kB, file-rss:0kB, shmem-rss:12kB

# httpd -V
Server version: Apache/2.4.6 (CentOS)
Server built: Apr 12 2017 21:03:28
Server's Module Magic Number: 20120211:24
Server loaded: APR 1.4.8, APR-UTIL 1.5.2
Compiled using: APR 1.4.8, APR-UTIL 1.5.2
Architecture: 64-bit
Server MPM: event
threaded: yes (fixed thread count)
forked: yes (variable process count)
Server compiled with....
-D APR_HAS_SENDFILE
-D APR_HAS_MMAP
-D APR_HAVE_IPV6 (IPv4-mapped addresses enabled)
-D APR_USE_SYSVSEM_SERIALIZE
-D APR_USE_PTHREAD_SERIALIZE
-D SINGLE_LISTEN_UNSERIALIZED_ACCEPT
-D APR_HAS_OTHER_CHILD
-D AP_HAVE_RELIABLE_PIPED_LOGS
-D DYNAMIC_MODULE_LIMIT=256
-D HTTPD_ROOT="/etc/httpd"
-D SUEXEC_BIN="/usr/sbin/suexec"
-D DEFAULT_PIDLOG="/run/httpd/httpd.pid"
-D DEFAULT_SCOREBOARD="logs/apache_runtime_status"
-D DEFAULT_ERRORLOG="logs/error_log"
-D AP_TYPES_CONFIG_FILE="conf/mime.types"
-D SERVER_CONFIG_FILE="conf/httpd.conf"


Also affected:
Apache/2.2.15 (CentOS 6.9), package: mod_fcgid-2.3.9-1.el6.x86_64
Apache/2.4.18 (Ubuntu 16.04.1), package: libapache2-mod-fcgid 2.3.9-1



Debug with memory limit (LimitAS=768M):

error.log:
[Sun Apr 23 13:11:19.986041 2017] [core:notice] [pid 3581:tid 139686508890240]
AH00051: child pid 3584 exit signal Segmentation fault (11), possible coredump
in /tmp

Core dump backtrace attached.

[b***@apache.org]

https://bz.apache.org/bugzilla/show_bug.cgi?id=61028

Mario <***@gmail.com> changed:

What |Removed |Added
----------------------------------------------------------------------------
CC| |***@gmail.com

[b***@apache.org]

https://bz.apache.org/bugzilla/show_bug.cgi?id=61028

Joe Orton <***@redhat.com> changed:

What |Removed |Added
----------------------------------------------------------------------------
Resolution|--- |DUPLICATE
Status|NEW |RESOLVED

--- Comment #1 from Joe Orton <***@redhat.com> ---
Likely a duplicate of bug 51747.

*** This bug has been marked as a duplicate of bug 51747 ***