tree 145b14be550e359e2a5a9f594f54f870d46fd926
parent 936aeb5c4a9fa799abd7d630a94223acedcaad50
author Sage Weil <sage@newdream.net> 1285607932 -0700
committer Sage Weil <sage@newdream.net> 1286463623 -0700

ceph: avoid null deref in osd request error path

If we interrupt an osd request, we call __cancel_request, but it wasn't
verifying that req->r_osd was non-NULL before dereferencing it.  This could
cause a crash if osds were flapping and we aborted a request on said osd.

Reported-by: Henry C Chang <henry_c_chang@tcloudcomputing.com>
Signed-off-by: Sage Weil <sage@newdream.net>