Bug 34869 - Intermittent File/Dir Mode Problems
Summary: Intermittent File/Dir Mode Problems
Status: RESOLVED INVALID
Alias: None
Product: Apache httpd-2
Classification: Unclassified
Component: Core (show other bugs)
Version: 2.0.46
Hardware: PC Linux
: P2 normal (vote)
Target Milestone: ---
Assignee: Apache HTTPD Bugs Mailing List
URL:
Keywords:
Depends on:
Blocks:
 
Reported: 2005-05-11 18:05 UTC by Brian W. Spolarich
Modified: 2005-05-13 07:34 UTC (History)
0 users



Attachments
PHP Test Script that exercises this issue (512 bytes, text/plain)
2005-05-13 15:13 UTC, Brian W. Spolarich
Details

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Description Brian W. Spolarich 2005-05-11 18:05:45 UTC
I am running Apache 2.0.46 under RHEL3 with the latest up2date patches.

Intermittently, I will have problems with files and directories created by
apache from both PHP and mod_perl applications (our custom apps, and RT in
particular) where the directories and/or files will wind up with (typically)
zero modes (0000).  The applications in question seem to be doing the right
thing in setting explicit modes on files/dirs that are created, and normal
exhibit expected behaviour.  But intermittently this problem will recur without
any other accompanying events.  It also seems to clear up on its own without my
intervention, although I have to chmod files that have already been created.

A developer I'm working with who is developing under a fairly different
environment (OSX, PHP5, Apache 2.0.52) who experiences the same problem with PHP
session files in /tmp winding up, again intermittently, with 0000 modes.

So the commonality here seems to be Apache 2.  I haven't been able to to
correlate this with any other log events.  

I am going to create a simple PHP program that will create files and dirs
through apache and have it run itself regularly via cron and see what happens in
terms of the modes.
Comment 1 Brian W. Spolarich 2005-05-11 18:14:41 UTC
SELinux is not enabled on my system.
Comment 2 Joe Orton 2005-05-12 09:00:33 UTC
You should report this to bugzilla.redhat.com since you're using vendor-patched
packages.

But it sounds a lot like some module or script is setting the umask badly.   I
doubt there is a bug in httpd itself here.  This needs to be narrowed down to a
specific issue with a specific module, first.
Comment 3 Brian W. Spolarich 2005-05-13 15:13:13 UTC
Created attachment 15020 [details]
PHP Test Script that exercises this issue

This is the test script that I wrote that exercises the problem over time.
Comment 4 Brian W. Spolarich 2005-05-13 15:15:22 UTC
So this script should produce the same results every time you would think, right?

It doesn't.  Looking at the permissions of the files in creates in
/tmp/apachetest I see:

474524    4 -rw-r--r--   1 apache   apache         30 May 13 04:31
./20050513/043150.test
474525    4 -rw-r--r--   1 apache   apache         30 May 13 04:46
./20050513/044650.test
474526    4 -rw-r--r--   1 apache   apache         30 May 13 05:01
./20050513/050150.test
474527    4 ----------   1 apache   apache         30 May 13 05:16
./20050513/051651.test
474528    4 ----------   1 apache   apache         30 May 13 05:30
./20050513/053000.test
474529    4 -rw-r--r--   1 apache   apache         30 May 13 05:31
./20050513/053150.test
474530    4 -rw-r--r--   1 apache   apache         30 May 13 05:46
./20050513/054651.test
474531    4 -rw-r--r--   1 apache   apache         30 May 13 06:01
./20050513/060150.test
474532    4 ----------   1 apache   apache         30 May 13 06:16
./20050513/061651.test
474533    4 ----------   1 apache   apache         30 May 13 06:29
./20050513/062959.test
474534    4 -rw-r--r--   1 apache   apache         30 May 13 06:31
./20050513/063150.test

Some files have mode 0644, some have 0000.

I will report this to the Redhat folks.  I didn't realize that the Apache2
distribution in that release was considered nonstandard.

But I can't see how this can be blamed on my application code, since I can
exercise the failure mode in a very simple test program.
Comment 5 Brian W. Spolarich 2005-05-13 15:34:20 UTC
(In reply to comment #4)
 
> I will report this to the Redhat folks.  I didn't realize that the Apache2
> distribution in that release was considered nonstandard.

Reported as bug 157648 at bugzilla.redhat.com.
https://bugzilla.redhat.com/bugzilla/show_bug.cgi?id=157648