Messages in this thread | | | Date | Fri, 13 Feb 2009 15:21:14 +0100 | From | Ingo Molnar <> | Subject | Re: [PATCH] User namespaces: Only put the userns when we unhash the uid |
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* David Howells <dhowells@redhat.com> wrote:
> From: Serge E. Hallyn <serue@us.ibm.com> > > uids in namespaces other than init don't get a sysfs entry. > > For those in the init namespace, while we're waiting to remove > the sysfs entry for the uid the uid is still hashed, and > alloc_uid() may re-grab that uid without getting a new > reference to the user_ns, which we've already put in free_user > before scheduling remove_user_sysfs_dir(). > > Reported-by: KOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com> > Signed-off-by: Serge E. Hallyn <serue@us.ibm.com> > Acked-by: David Howells <dhowells@redhat.com> > Tested-by: Ingo Molnar <mingo@elte.hu>
beyond the crashes, this should resolve this slab corruption regression too:
Bug-Entry : http://bugzilla.kernel.org/show_bug.cgi?id=12503 Subject : [slab corruption] BUG key_jar: Poison overwritten Submitter : Ingo Molnar <mingo@elte.hu> Date : 2009-01-15 18:16 (25 days old) References : http://marc.info/?l=linux-kernel&m=123204353425825&w=4 Handled-By : David Howells <dhowells@redhat.com>
Ingo
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