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Bug #24576 Segmentation fault on sapi_initialize_empty_request
Submitted: 2003-07-10 02:34 UTC Modified: 2003-07-12 09:44 UTC
From: druid at mail dot cz Assigned:
Status: Not a bug Package: Apache2 related
PHP Version: 4.3.2 OS: Linux 2.4.20
Private report: No CVE-ID: None
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 [2003-07-10 02:34 UTC] druid at mail dot cz 
Description:
------------
Php always crashes at start. I've tested it with sapi.
I've got the latest gcc and glibc:

Reading specs from /usr/lib/gcc-lib/i686-pc-linux-gnu/3.3/specs
Configured with: ../gcc-3.3/configure --prefix=/usr --enable-shared --enable-threads=posix --with-slibdir=/lib --enable-__cxa_atexit --enable-clocale=gnu --enable-__vt_8iostream
Thread model: posix
gcc version 3.3

./configure --with-apxs2=/usr/local/apache/bin/apxs \
--with-zlib --enable-bcmath --with-bz2=shared --enable-calendar \
--enable-exif --enable-ftp --with-ttf --with-gettext \
--with-gd --with-jpeg-dir --with-png-dir --with-freetype-dir \
--with-mysql --with-mysql-sock --with-recode=shared \
--with-imap --with-imap-ssl=/usr/local/ssl \
--enable-debug

glibc-2.3.2

Reproduce code:
---------------
SAPI_API void sapi_initialize_empty_request(TSRMLS_D)
{
        SG(server_context) = NULL;
        SG(request_info).request_method = NULL;
        SG(request_info).auth_user = SG(request_info).auth_password = NULL;
        SG(request_info).content_type_dup = NULL;
}

The last line is the problem.

Actual result:
--------------
Program received signal SIGSEGV, Segmentation fault.
sapi_initialize_empty_request () at /usr/src/php-4.3.2/main/SAPI.c:437
437             SG(request_info).content_type_dup = NULL;
(gdb) bt
#0  sapi_initialize_empty_request () at /usr/src/php-4.3.2/main/SAPI.c:437
#1  0x081841d7 in php_module_startup (sf=0x82e02e0,
    additional_modules=0x82e02e0, num_additional_modules=137240573)
    at /usr/src/php-4.3.2/main/main.c:1083
#2  0x6e690078 in ?? ()

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 [2003-07-10 03:03 UTC] druid at mail dot cz 
I tried php-5b1 and it is nearly the same, except the gdb output:

Program received signal SIGSEGV, Segmentation fault.
[Switching to Thread 16384 (LWP 22382)]
0x081b1e50 in sapi_initialize_empty_request ()
(gdb) bt
#0  0x081b1e50 in sapi_initialize_empty_request ()
#1  0x081ac114 in php_module_startup ()
#2  0x40395ca6 in __libc_start_main () from /lib/libc.so.6
 [2003-07-10 11:51 UTC] sniper@php.net 
Please try using this CVS snapshot:

  http://snaps.php.net/php4-STABLE-latest.tar.gz
 
For Windows:
 
  http://snaps.php.net/win32/php4-win32-STABLE-latest.zip

(Make sure the build time is later than Jul 10, 2003 15:30.)

Which apache2 version? 
How was it configured?
How do you start it?
What other modules are enabled in it?
 [2003-07-12 06:11 UTC] druid at mail dot cz 
There's no apache. I'm talking about the php binary. The sapi.

Fyi, I switched back to gcc 3.2.1 and everything's ok.
 [2003-07-12 09:11 UTC] sniper@php.net 
Some gcc bug then.
 [2003-07-12 09:44 UTC] druid at mail dot cz 
Only some incompatibility. I'm not saying that gcc 3.3 isn't crap but it was stable version so we can expect that it will be included in some distros... At least I wouldn't underestimate it.
 
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