Re: [bug] suspicious RCU usage nfs_idmap_get_key

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Jan Stancek <jstancek@xxxxxxxxxx> wrote:

> I'm running into following warning with 4.10 reliably (on ppc64le)
> when I mount NFS volume (exported by RHEL6 system):

Yeah.  I've seen this before.

> Patch below makes it go away for me, but I'm not sure it's the correct way.

The right solution is to split user_key_payload().  It's actually getting used
for two different things.  We really need a user_key_payload_rcu() that just
uses rcu_dereference().

David
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