Messages in this thread | | | Date | Thu, 22 Jun 2017 14:58:37 -0400 | From | Tejun Heo <> | Subject | Re: [next-20170609] WARNING: CPU: 3 PID: 71167 at lib/idr.c:157 idr_replace |
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On Thu, Jun 22, 2017 at 12:31:35AM +0100, Chris Wilson wrote: > Quoting Tejun Heo (2017-06-13 14:58:49) > > Cc'ing David Airlie. > > > > This is from drm driver calling in idr_replace() w/ a negative id. > > Probably a silly bug in error handling path? > > No, this is the validation of an invalid userspace handle. The drm ABI > for handles is supposed to be a full u32 range with 0 reserved for an > invalid handle (constrained by the idr_alloc ofc). The WARN was > introduced by 0a835c4f090a.
Matthew, did idr lost some of its range while being reimplemented using radix tree?
Thanks.
-- tejun
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