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[2007-05-30 22:04 UTC] wdierkes at 5dollarwhitebox dot org
Description: ------------ The Mhash extension SegFaults on Redhat Enterprise Linux ES 3 when using the MD5 algorithm. All other algorithms seem to work except MD5. NOTE: This appears to possibly be related to bug #30983 which is closed (and I could not touch it). In that bug, it was claimed to 'not imply a bug in PHP itself'. This may be true, however similar tests against the Mhash library itself using C code function as expected. I ran the same test against the Mhash library using the following C code located here: http://www.5dollarwhitebox.org/tmp/mhash_test.c You must install the Mhash library obviously, then compile and run the test file: [rpm-dev@linuxbox ~]$ gcc -lmhash -o mhash_test mhash_test.c [rpm-dev@linuxbox ~]$ ./mhash_test The issue exists on Rhel3 i386/x86_64, but does *not* exist on Rhel4.. and I am using Mhash-0.9.9 Reproduce code: --------------- PHP Code: <?php $input = "PassW0rd"; print "clear text input: " . $input . "\n"; $tmp_hash_name = mhash_get_hash_name(MHASH_MD5); print "hash name: " . $tmp_hash_name . "\n"; print "hash follows: "; print bin2hex(mhash(MHASH_MD5, $input)) . "\n"; ?> Expected result: ---------------- Expected PHP Output: [rpm-dev@linuxbox ~]$ php mhash_test.php clear text input: PassW0rd hash name: MD5 hash follows: 298cde70c32a57b84d0a546fedbb2596 Actual result: -------------- Actual PHP Output: [rpm-dev@linuxbox ~/]$ php mhash_test.php clear text input: PassW0rd hash name: MD5 hash follows: Segmentation fault PatchesPull RequestsHistoryAllCommentsChangesGit/SVN commits
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Program received signal SIGSEGV, Segmentation fault. [Switching to Thread -1218525024 (LWP 4690)] 0x0068c5b8 in malloc_consolidate () from /lib/tls/libc.so.6 (gdb) bt #0 0x0068c5b8 in malloc_consolidate () from /lib/tls/libc.so.6 #1 0x0068bd59 in _int_malloc () from /lib/tls/libc.so.6 #2 0x0068b0fd in malloc () from /lib/tls/libc.so.6 #3 0x00dbe5a2 in apr_allocator_set_mutex () from /usr/lib/libapr-0.so.0 #4 0x00117942 in apr_bucket_alloc () from /usr/lib/libaprutil-0.so.0 #5 0x001171c2 in apr_brigade_write () from /usr/lib/libaprutil-0.so.0 #6 0x08077557 in ap_old_write_filter () #7 0x08077667 in ap_rwrite () #8 0x07439d4b in php_apache_sapi_ub_write ( str=0xb73931cc "clear text input: PassW0rd\nname: MD5\nhash follows: ", '0' <repeats 32 times>, "\n", str_length=84) at /usr/src/debug/php-5.2.2/sapi/apache2handler/sapi_apache2.c:78 #9 0x0737b765 in php_ub_body_write_no_header ( str=0xb73931cc "clear text input: PassW0rd\nname: MD5\nhash follows: ", '0' <repeats 32 times>, "\n", str_length=84) at /usr/src/debug/php-5.2.2/main/output.c:688 #10 0x0737b859 in php_ub_body_write ( str=0xb73931cc "clear text input: PassW0rd\nname: MD5\nhash follows: ", '0' <repeats 32 times>, "\n", str_length=84) at /usr/src/debug/php-5.2.2/main/output.c:721 #11 0x0737a98b in php_end_ob_buffer (send_buffer=1 '\001', just_flush=0 '\0') at /usr/src/debug/php-5.2.2/main/output.c:300 #12 0x0737ab46 in php_end_ob_buffers (send_buffer=1 '\001') at /usr/src/debug/php-5.2.2/main/output.c:339 #13 0x07366eaf in php_request_shutdown (dummy=0x0) at /usr/src/debug/php-5.2.2/main/main.c:1291 #14 0x0743aafa in php_apache_request_dtor (r=0x9e31920) at /usr/src/debug/php-5.2.2/sapi/apache2handler/sapi_apache2.c:463 #15 0x0743b292 in php_handler (r=0x9e31920) at /usr/src/debug/php-5.2.2/sapi/apache2handler/sapi_apache2.c:635 #16 0x08068625 in ap_run_handler () #17 0x08068c3f in ap_invoke_handler () #18 0x08065266 in ap_process_request () #19 0x080608dc in _start () #20 0x09e31920 in ?? () #21 0x00000004 in ?? () #22 0x09e31920 in ?? () #23 0x009dd2f7 in modperl_process_connection_handler () from /etc/httpd/modules/mod_perl.so #24 0x080723d5 in ap_run_process_connection () #25 0x08066b01 in ap_graceful_stop_signalled () #26 0x08066d1a in ap_graceful_stop_signalled () #27 0x08066d76 in ap_graceful_stop_signalled () #28 0x080675cd in ap_mpm_run () #29 0x0806dbcf in main () NOTE: A co-worker of mine mentioned that he ran into this a while ago. He mentioned that the issue was that the ldap module, and Mhash library had conflicting function names (possibly relating to SSL)... etc. Therefore, it is likely not a PHP issue directly, though not certain of the proper path to take in resolving the matter.