Bug 182424 - mount program segfaults when specifying mount program version as 2 over nfs
mount program segfaults when specifying mount program version as 2 over nfs
Product: Red Hat Enterprise Linux 4
Classification: Red Hat
Component: util-linux (Show other bugs)
All Linux
medium Severity medium
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Assigned To: Steve Dickson
Ben Levenson
: 197715 (view as bug list)
Depends On:
Blocks: 181409
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Reported: 2006-02-22 09:30 EST by Neil Horman
Modified: 2010-10-22 00:15 EDT (History)
2 users (show)

See Also:
Fixed In Version: RHBA-2006-0406
Doc Type: Bug Fix
Doc Text:
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Clone Of:
Last Closed: 2006-08-10 17:42:16 EDT
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Regression: ---
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RHEL 7.3 requirements from Atomic Host:
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Attachments (Terms of Use)
patch to correct mount behavior in util-linux-2.12a (387 bytes, patch)
2006-02-22 09:38 EST, Neil Horman
no flags Details | Diff

  None (edit)
Description Neil Horman 2006-02-22 09:30:06 EST
Description of problem:
The mount program will segfault if mounting an nfs mount using version 3 of the
nfs rpc program but version 2 of the mount rpc program

mount -t nfs -o nfsvers=3,mountvers=2 rxi600-4:/work /mnt/work
Segmentation fault (core dumped)

Version-Release number of selected component (if applicable):
mount program from util-linux-2.12a

How reproducible:

Steps to Reproduce:
1.mount -t nfs -o nfsvers=3,mountvers=2 <nfs server>:<exported path> <local path>

Actual results:

Expected results:
successful mount

Additional info:
Comment 1 Neil Horman 2006-02-22 09:38:15 EST
Created attachment 125032 [details]
patch to correct mount behavior in util-linux-2.12a

problem turns out to be in nfsmount.  The segfault occurs because we try to
dereference the authentication flavors array, which is returned as NULL.  This
is occuring because we are trying to use the mount rpc program version 3
algorithm to process a mount when we requested the mount to be preformed using
mount rpc program version 2.  This in turn is because when we check the return
data from the rpc call, we select which algorithm we use based on the nfs rpc
program, rather than on the mount rpc version, which we should.  I've written
the attached patch to correct this behavior.  Tested and found working by me.
Comment 2 Karel Zak 2006-02-22 10:01:33 EST
Steve, check the patch, please. Thanks.
Comment 5 Steve Dickson 2006-04-23 06:50:18 EDT
Fixed in util-linux-2.12a-16.EL4.17
Comment 10 Karel Zak 2006-07-05 17:13:27 EDT
*** Bug 197715 has been marked as a duplicate of this bug. ***
Comment 15 Red Hat Bugzilla 2006-08-10 17:42:16 EDT
An advisory has been issued which should help the problem
described in this bug report. This report is therefore being
closed with a resolution of ERRATA. For more information
on the solution and/or where to find the updated files,
please follow the link below. You may reopen this bug report
if the solution does not work for you.


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