Bug 807703 - noshell parameter ignored by anaconda
noshell parameter ignored by anaconda
Product: Fedora
Classification: Fedora
Component: anaconda (Show other bugs)
All Linux
unspecified Severity unspecified
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Assigned To: Will Woods
Fedora Extras Quality Assurance
: FutureFeature, Reopened
Depends On:
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Reported: 2012-03-28 10:26 EDT by Daniel Winter
Modified: 2014-02-25 15:15 EST (History)
5 users (show)

See Also:
Fixed In Version: anaconda-21.25-1
Doc Type: Enhancement
Doc Text:
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Clone Of:
Last Closed: 2013-02-13 21:29:56 EST
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Regression: ---
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oVirt Team: ---
RHEL 7.3 requirements from Atomic Host:
Cloudforms Team: ---

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Description Daniel Winter 2012-03-28 10:26:44 EDT
Description of problem:

Adding the "noshell" parameter to the kernel arguments does not have any effect. 
It is not handeled by Anaconda. Hence a root shell can be opend on tty2 during the installation process.

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

How reproducible:


Steps to Reproduce:
1.Boot the installer kernel with the "noshell" parameter. (PXE)
2.During installation press <CTRL><ALT><F2>

Actual results:

I get a root shell

Expected results:

No shell access as root during anaconda install

Additional info:

In the Kickstart %pre section I did:

/bin/systemctl disable anaconda-shell\@.service
/bin/systemctl stop anaconda-shell\@tty2.service

This takes effect too late. 10s+ time to tamper with the system.

Comment 2 Will Woods 2012-05-15 15:33:19 EDT
Trying to keep people out of a machine they have physical access to is a sucker's bet, but anyway..

Adding 'ConditionKernelCommandLine=!noshell' to anaconda-shell@.service yields the expected behavior in my testing.

We can easily get this in for F18. F17 I'm not so sure there's time for.
Comment 3 Fedora End Of Life 2013-01-16 19:49:06 EST
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Comment 4 Fedora End Of Life 2013-02-13 21:29:59 EST
Fedora 16 changed to end-of-life (EOL) status on 2013-02-12. Fedora 16 is 
no longer maintained, which means that it will not receive any further 
security or bug fix updates. As a result we are closing this bug.

If you can reproduce this bug against a currently maintained version of 
Fedora please feel free to reopen this bug against that version.

Thank you for reporting this bug and we are sorry it could not be fixed.
Comment 5 Adam Williamson 2013-05-11 20:14:54 EDT
This seems like a very simple fix that got needlessly EOLed. Will, can you throw it in there? That ConditionKernelCommandLine should work fine. Note that 'noshell' is documented at Anaconda/Options and there's an embarrassing note there that it's been broken since F16, so we should probably fix it...
Comment 6 Will Woods 2014-01-24 13:26:29 EST
This was fixed in commit ad34bcd, which should be in anaconda-21.16 or higher:

Comment 7 Will Woods 2014-02-25 15:15:49 EST
Okay, it was actually *partially* fixed in ad34bcd, but tmux still gave you a shell.

Commit 11af277 disables tmux when booting with 'noshell', which should complete the fix:


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