APPLIED: [Natty][SRU][PATCH] Kernel Oops : Dentry still in use (1) [unmount of nfs4 0:1d]

Tim Gardner tim.gardner at
Thu Dec 1 02:51:25 UTC 2011

On 11/30/2011 12:12 PM, Chris J Arges wrote:
> BugLink:
> SRU Justification:
> Impact:
> If two processes attempt to cause automounting on the same mountpoint at
> the same time, the vfsmount holding the mountpoint will be left with one
> too few references on it, causing a BUG when the kernel tries to clean up.
> Fix:
> Fix has been cherry picked from 8aef18845266f5c05904c610088f2d1ed58f6be3t.
> It has been accepted in 3.0 and is present in ubuntu-oneiric.
> It applies cleanly to ubuntu-natty.
> Testcase:
> The procedure for replicating this bug is outlined in the patch
> description. Essentially mounting an nfs mount with another mount in it.
> Running a test program, and unmount the submount and original mount.
> Patch is attached.

Tim Gardner tim.gardner at

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