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Subject [Bug 54881] New: segfault with SetEnvIfExpr and SetEnvIf
Date Wed, 24 Apr 2013 08:51:18 GMT

            Bug ID: 54881
           Summary: segfault with SetEnvIfExpr and SetEnvIf
           Product: Apache httpd-2
           Version: 2.4.4
          Hardware: PC
                OS: Linux
            Status: NEW
          Severity: normal
          Priority: P2
         Component: mod_setenvif
    Classification: Unclassified

Compiled and installed Apache HTTPD 2.4.4 on CentOS 6.4 with
APR 1.4.6
APR-util 1.5.2
PCRE 8.32

My httpd.conf:
LoadModule setenvif_module modules/
LoadModule unixd_module modules/

User daemon
Listen 8000
DocumentRoot "/usr/local/apache2/htdocs"
ServerName test

SetEnvIfExpr "true" envA=1
SetEnvIf User-Agent "test" envB=1

I'm getting a segmentation fault if a any SetEnvIf directive follows after a
SetEnvIfExpr directive:

# gdb ./httpd
(gdb) run
Starting program: /usr/local/apache2/bin/httpd 
[Thread debugging using libthread_db enabled]

Program received signal SIGSEGV, Segmentation fault.
0x00007ffff6c8f799 in __strcasecmp_l_ssse3 () from /lib64/
Missing separate debuginfos, use: debuginfo-install expat-2.0.1-11.el6_2.x86_64
glibc-2.12-1.107.el6.x86_64 nss-softokn-freebl-3.12.9-11.el6.x86_64
(gdb) bt
#0  0x00007ffff6c8f799 in __strcasecmp_l_ssse3 () from /lib64/
#1  0x00007ffff64ee1a0 in add_setenvif_core (cmd=0x7fffffffe3f0, mconfig=<value
optimized out>, fname=0x6cc4c0 "User-Agent", 
    args=0x6cb55a "envB=1") at mod_setenvif.c:317
#2  0x00007ffff64ee597 in add_setenvif (cmd=0x7fffffffe3f0, mconfig=0x6c9cb8,
args=0x6cb553 "\"test\" envB=1") at mod_setenvif.c:415
#3  0x0000000000448ace in invoke_cmd (cmd=0x7ffff66ef600, parms=0x7fffffffe3f0,
mconfig=0x6c9cb8, args=0x6cb548 "User-Agent \"test\" envB=1")
    at config.c:876
#4  0x000000000044a5c3 in ap_walk_config_sub (current=0x6cb500,
parms=0x7fffffffe3f0, section_vector=0x6c7858) at config.c:1306
#5  ap_walk_config (current=0x6cb500, parms=0x7fffffffe3f0,
section_vector=0x6c7858) at config.c:1339
#6  0x000000000044aa49 in ap_process_config_tree (s=<value optimized out>,
conftree=<value optimized out>, p=0x695138, ptemp=<value optimized out>)
    at config.c:2063
#7  0x0

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