ceph: avoid null deref in osd request error path
authorSage Weil <sage@newdream.net>
Mon, 27 Sep 2010 17:18:52 +0000 (10:18 -0700)
committerSage Weil <sage@newdream.net>
Thu, 7 Oct 2010 15:00:23 +0000 (08:00 -0700)
commit6bc18876ba01fd4a077db6e1ed27201e4bda8864
tree145b14be550e359e2a5a9f594f54f870d46fd926
parent936aeb5c4a9fa799abd7d630a94223acedcaad50
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>
fs/ceph/osd_client.c