From 6bc18876ba01fd4a077db6e1ed27201e4bda8864 Mon Sep 17 00:00:00 2001
From: Sage Weil <sage@newdream.net>
Date: Mon, 27 Sep 2010 10:18:52 -0700
Subject: [PATCH] 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>
---
Reading git-format-patch failed