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Bug #3632 Abort trap
Submitted: 2000-02-25 22:18 UTC Modified: 2000-02-29 14:59 UTC
From: hroi at asdf dot dk Assigned:
Status: Closed Package: IMAP related
PHP Version: 4.0 Beta 4 OS: FreeBSD 3.4-STABLE
Private report: No CVE-ID: None
View Developer Edit
 [2000-02-25 22:18 UTC] hroi at asdf dot dk 
I was experimenting with php's imap support and it seemed to work ok, but then things started crashing.
httpd exits with the following message:
[Sat Feb 26 04:03:05 2000] [notice] child pid 87650 exit signal Abort trap (6)

Short script:
<html>
<head>
<title>fdl</title>
</head>
<body>
<?php 

$link = imap_open("{imap.asdf.dk:143}INBOX","cetec","cetec"); 

$nmsgs = imap_num_msg($link);
print $nmsgs;
for($i=0; $i <= $nmsgs; $i++)  {
	$fullheader = imap_fetchheader($link, $i);
	$headers = explode("\r\n", $fullheader);
	print "DEBUG: count(\$headers) == " . count($headers) . "<br>\n";
	for($j = 0; $j <= count($headers); $j++) {
		if (ereg("^Subject: (.*)\$", $headers[$j+1], $eregs)) {
			print $eregs[1] . "<hr>\n";
		}
	}
} 

?>
</body>
</html>

No php.ini.
Relevant modules: imap (v 4.7 client lib)
Apache 1.3.11.

I'm willing to be instructed in how to debug this. Just mail me.

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 [2000-02-29 10:10 UTC] hholzgra at cvs dot php dot net 
as far as i remember apache terminates itself
with an Abort signal when it runs out of memory

you may hunt this down with gdb or whatever 
debugger/frontend you prefer and apache started
in single user mode with 'httpd -X'
 [2000-02-29 13:58 UTC] chagenbu at cvs dot php dot net 
Don't fetch the headers for message 0 - your for loop should
look like this:

for($i=1; $i <= $nmsgs; $i++) {...}

It still shouldn't crash, though. I'm looking into why it does...
 [2000-02-29 14:09 UTC] chagenbu at cvs dot php dot net 
Here's a backtrace. Makes no sense to me, though - why is
it getting into imap_mail_compose? This is using the same
test code provided below (with the off-by-one error needed
to produce the crash).

Program received signal SIGABRT, Aborted.
0x400c7911 in kill () from /lib/libc.so.6
(gdb) bt
#0  0x400c7911 in kill () from /lib/libc.so.6
#1  0x400c75f8 in raise () from /lib/libc.so.6
#2  0x400c8c51 in abort () from /lib/libc.so.6
#3  0x402d100f in utf8_text_2022 () at utf8.c:755
#4  0x402c068c in mail_partial_body () at mail.c:1161
#5  0x402520ea in php_if_imap_mail_compose () at imap.c:295
#6  0x402210dd in execute () at ./zend_execute.c:940
#7  0x4020bd19 in cfgparse () at configuration-parser.y:320
#8  0x40239593 in php_if_apache_note () at php_apache.c:114
#9  0x40239ee6 in php_if_getallheaders () at php_apache.c:114
#10 0x40239f36 in php_if_apache_lookup_uri () at php_apache.c:114
#11 0x8053e64 in ap_invoke_handler (r=0x80f5afc) at http_config.c:508
#12 0x80625ec in process_request_internal (r=0x80f5afc) at http_request.c:1214
#13 0x8062648 in ap_process_request (r=0x80f5afc) at http_request.c:1230
#14 0x805c439 in child_main (child_num_arg=0) at http_main.c:4122
#15 0x805c5cc in make_child (s=0x8099c24, slot=0, now=951851188)
    at http_main.c:4235
#16 0x805c6e9 in startup_children (number_to_start=5) at http_main.c:4317
#17 0x805cb9b in standalone_main (argc=2, argv=0xbffff7a4) at http_main.c:4605
#18 0x805d24d in main (argc=2, argv=0xbffff7a4) at http_main.c:4933
 [2000-02-29 14:59 UTC] chagenbu at cvs dot php dot net 
Well, the backtrace still makes no sense to me, but I've
fixed this in CVS for php3 and php4. We now output a warning
(php_error) if the message number is bad.
 
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