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Bug #56941 efree(version) produces core dump
Submitted: 2006-04-06 17:54 UTC Modified: 2006-04-06 17:58 UTC
From: marcus at corp dot grupos dot com dot br Assigned:
Status: Closed Package: memcache (PECL)
PHP Version: 5.1.1 OS: FreeBSD
Private report: No CVE-ID: None
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From: marcus at corp dot grupos dot com dot br
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 [2006-04-06 17:54 UTC] marcus at corp dot grupos dot com dot br 
Description:
------------
After first run of pconnect and after memcached server restart, pecl-memcache produce a core dump.

That's because version=NULL and efree() try to free NULL pointer.

GDB:
(gdb) bt full
#0  0x285f7e1e in ?? () from /usr/local/libexec/apache2/libphp5.so
No symbol table info available.
#1  0x28e64aba in mmc_open (mmc=0x840a000, force_connect=1, error_string=0xbfbfc634, errnum=0xbfbfc640)
    at /usr/ports/databases/pecl-memcache/work/memcache-2.0.1/memcache.c:583
        version = 0x0
#2  0x28e67453 in php_mmc_connect (ht=2, return_value=0x8510b24, return_value_ptr=0x0, this_ptr=0x8510a24, return_value_used=1, persistent=1)
    at /usr/ports/databases/pecl-memcache/work/memcache-2.0.1/memcache.c:1471
        mmc_object = (zval *) 0x8510a24
        mmc = (mmc_t *) 0x840a000
        pool = (mmc_pool_t *) 0x9
        errnum = 0
        host_len = 9
        host = 0x85107e4 "localhost"
        error_string = 0x0
        port = 11211
        timeout = 1
#3  0x28e675c3 in zif_memcache_pconnect (ht=2, return_value=0x8510b24, return_value_ptr=0x0, this_ptr=0x8510a24, return_value_used=1)
    at /usr/ports/databases/pecl-memcache/work/memcache-2.0.1/memcache.c:1512
No locals.
#4  0x2862f636 in ?? () from /usr/local/libexec/apache2/libphp5.so
No symbol table info available.
--

FIX:

if (version)
    efree(version);

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AllCommentsChangesGit/SVN commitsRelated reports
 [2006-04-06 17:58 UTC] tony2001 at phpclub dot net 
This bug has been fixed in CVS.

In case this was a documentation problem, the fix will show up at the
end of next Sunday (CET) on pecl.php.net.

In case this was a pecl.php.net website problem, the change will show
up on the website in short time.
 
Thank you for the report, and for helping us make PECL better.
 
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