From 570615b63abbbccd4beaaf4a09a206006b3e86c1 Mon Sep 17 00:00:00 2001
From: Sage Weil <sage@redhat.com>
Date: Fri, 30 Sep 2016 17:06:47 -0400
Subject: [PATCH] os/bluestore: fix gc when blob extends past eof

This can happen if we aren't referencing the bob.  Don't try to
read what isn't logically referenced.

Signed-off-by: Sage Weil <sage@redhat.com>
---
 src/os/bluestore/BlueStore.cc | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/src/os/bluestore/BlueStore.cc b/src/os/bluestore/BlueStore.cc
index 51c836454fa..92ce9f5d905 100644
--- a/src/os/bluestore/BlueStore.cc
+++ b/src/os/bluestore/BlueStore.cc
@@ -7571,6 +7571,9 @@ bool BlueStore::_do_write_check_depth(
       *gc_end_offset = tp->logical_offset + tp_prev->length;
     }
   }
+  if (*gc_end_offset > o->onode.size) {
+    *gc_end_offset = MAX(end_offset, o->onode.size);
+  }
   dout(20) << __func__ << " depth " << (int)depth
 	   << ", gc 0x" << std::hex << *gc_start_offset << "~"
 	   << (*gc_end_offset - *gc_start_offset)