Bug 84207

Summary: read-only mount --bind isn't read-only
Product: [Retired] Red Hat Linux Reporter: John Haxby <jch>
Component: mountAssignee: Elliot Lee <sopwith>
Status: CLOSED DUPLICATE QA Contact: Brian Brock <bbrock>
Severity: medium Docs Contact:
Priority: medium    
Version: 8.0CC: mitr
Target Milestone: ---   
Target Release: ---   
Hardware: i386   
OS: Linux   
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Fixed In Version: Doc Type: Bug Fix
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Clone Of: Environment:
Last Closed: 2006-02-21 18:51:46 UTC Type: ---
Regression: --- Mount Type: ---
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oVirt Team: --- RHEL 7.3 requirements from Atomic Host:
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Bug Depends On:    
Bug Blocks: 164572    

Description John Haxby 2003-02-13 14:26:01 UTC
From Bugzilla Helper:
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Description of problem:
I wanted to bind-mount a directory read-only so that I could safely make it
visible through ftp, but, alas, it isn't read-only 00 it looks as though the
read-only flag is ignored even though it appears in the output of "mount".

Version-Release number of selected component (if applicable):


How reproducible:
Always

Steps to Reproduce:
1. mkdir /tmp/xxx /tmp/yyy
2. mount -o ro,bind /tmp/xxx /tmp/yyy
3. touch /tmp/yyy/this-should-not-work
    

Actual Results:  Each command reports everything OK and the file is created.

Expected Results:  I was rather hoping to get a "read-only filesystem" error.

Additional info:

"mount | grep /tmp" shows

    /tmp/xxx on /tmp/yyy type none (ro,bind)

which rather suggests that /tmp/yyy should be read-only, but "grep /tmp
/proc/mounts" shows

    /dev/sheep/root /tmp/yyy reiserfs rw 0 0

which rather suggests it doesn't.  I have an ext3 bind as well which exhibits
the same characteristics.

This is with kernel-2.4.18-24.8.0 and mount-2.11r-10.

This may well be a combination between a bug and an enhancement request if the
kernel doesn't support a read-only bind.

Comment 1 Elliot Lee 2003-07-30 20:23:45 UTC
Can't change mount options with --bind

*** This bug has been marked as a duplicate of 77962 ***

Comment 2 Red Hat Bugzilla 2006-02-21 18:51:46 UTC
Changed to 'CLOSED' state since 'RESOLVED' has been deprecated.