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Bug #8243 session_decode() causes SIGSEGV
Submitted: 2000-12-13 19:04 UTC Modified: 2000-12-14 06:46 UTC
From: martin at netconfigs dot com Assigned:
Status: Closed Package: Session related
PHP Version: 4.0.1pl2 OS: Linux2.2.16(SuSE7)
Private report: No CVE-ID: None
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From: martin at netconfigs dot com
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 [2000-12-13 19:04 UTC] martin at netconfigs dot com 
.htaccess:
php_flag register_globals off
php_value session.save_path _sessions

php-script:
<script language=php>
        session_start();
        session_decode('selfas|s:4:"5089";');
</script>

backtrace:
Program received signal SIGSEGV, Segmentation fault.
0x401b2817 in _efree () at zend_alloc.c:281
281     zend_alloc.c: No such file or directory.
(gdb) bt
#0  0x401b2817 in _efree () at zend_alloc.c:281
#1  0x4020ca1a in php_rshutdown_session_globals () at session.c:1282
#2  0x4020cafc in php_rshutdown_session () at session.c:1287
#3  0x401cb2cd in module_registry_cleanup () at zend_API.c:758
#4  0x401ce7fa in zend_hash_apply () at zend_hash.c:639
#5  0x401ca6e9 in zend_deactivate_modules () at zend.c:253
#6  0x401da611 in php_request_shutdown () at main.c:581
#7  0x401d7f4b in php_apache_request_shutdown (dummy=0x0) at mod_php4.c:301
#8  0x80513f1 in run_cleanups ()
#9  0x804f963 in ap_clear_pool ()
#10 0x804f9e7 in ap_destroy_pool ()
#11 0x8060a83 in child_main ()
#12 0x8060be5 in make_child ()
#13 0x8060d66 in startup_children ()
#14 0x80613dd in standalone_main ()
#15 0x8061c0c in main ()
#16 0x400c5a8e in __libc_start_main () at ../sysdeps/generic/libc-start.c:93


Also tried:
1) giving session_decode() an empty string;
2) not calling session_start()

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 [2000-12-14 03:53 UTC] stas@php.net 
Doesn't happen on latest version. Please try a snapshot from
snaps.php.net and report if it still crashes.
 [2000-12-14 06:43 UTC] martin at netconfigs dot com 
okay - tested it against 'PHP Version 4.0.5-dev' and it nolonger crashes

I have also tested the other bug (#8226) which I submitted a few hours earlier and it also seems to work fine now without the use of a workaround. - Well done.

Question: Since the pages that I am developing will be loaded onto a public server which is not under my control, I will need to ask them to upgrade.  When will these fixes find their way into a proper release ?
 [2000-12-14 06:46 UTC] stas@php.net 
User reposrts as fixed.
 
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