Bug #9461 Updated: imap_open crash when connecting to nntp with username and password

ID: 9461 Updated by: chagenbu Reported By: bo@erichsen.com Status: Open Bug Type: IMAP related PHP Version: 4.0 Latest CVS (26/02/2001) Assigned To: Comments: From: James Treleaven <jametrel@enoreo.on.ca> Like the author of bug #9461, I also tracked the problem down to mm_login() in ext/imap/php_imap.c [that is where my stack was getting stomped]. I replaced the later two calls to strncpy() in the function, with calls to strcpy(), and now I can use the function to login to news servers with no problem! The code in mm_login() looks correct to me - but I cannot believe that there is a bug in Linux's libc.a:strncpy(). I have a web based gateway up and running with hundreds of user's using my modified imap_open() to successfully connect to nntp with their usernames and passwords (we always require authentication). My modification seems to be a good workaround - but I don't know why. Previous Comments: --------------------------------------------------------------------------- [2001-02-26 08:36:22] bo@erichsen.com function that causes crash <?php> imap_open('{newsserver/nntp}'.'test.test','username','password') || die("can't connect: ".imap_last_error()); </php> backtrace from gdb ( i know it says nothing but i did as described in the backtrace faq.) #0 0x0 in ?? () I have a problem with imap_open: I can do imap_open on nntp server that has no authentication. But when i try on a nntpserver that requires a password.. php dumps core (signal 11 gdb backtrace is #0 0x0 in ?? ()) ( i executed the cgi version of php to be sure that apache has nothing to do with it.) i tested c-client with the mtest program and it worked perfectly. I've tried to compile php4 with -enable-debug but i'm not so experienced with gdb so when i load the core-file i still get no symbols or references to the instruction that causes the problem. it should be simple to test: try to connect to a nntp server without username and password try to connect to a nntp server that requires username and password i have looked through the c-client code and the php4 extension and i could imagine the problem might be in mm_login but i'm not certain. the server is running: php4.0.5-dev latest cvs linux 2.2.12-20smp imap (imap-2001.BETA.SNAP-0102201858) also tried (imap-4.7c) All help is appreciated and if anybody wants more information or maybe a test nntp account i can provide that (just send me a mail bo@erichsen.com). --------------------------------------------------------------------------- ATTENTION! Do NOT reply to this email! To reply, use the web interface found at http://bugs.php.net/?id=9461&edit=2