From 3a5452d65da2acf020836dade6f9e79c7b0e1dfb Mon Sep 17 00:00:00 2001
From: Ben Walker <benjamin.walker@intel.com>
Date: Fri, 20 Apr 2018 14:48:24 -0700
Subject: [PATCH] bdev/lvol: Validate lvs_bdev during dump info json

Change-Id: I16021ccd1fc6638dae977d0089f85895e60ceced
Signed-off-by: Ben Walker <benjamin.walker@intel.com>
Reviewed-on: https://review.gerrithub.io/408530
Reviewed-by: Daniel Verkamp <daniel.verkamp@intel.com>
Tested-by: SPDK Automated Test System <sys_sgsw@intel.com>
Reviewed-by: Changpeng Liu <changpeng.liu@intel.com>
Reviewed-by: Shuhei Matsumoto <shuhei.matsumoto.xt@hitachi.com>
---
 lib/bdev/lvol/vbdev_lvol.c | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/lib/bdev/lvol/vbdev_lvol.c b/lib/bdev/lvol/vbdev_lvol.c
index f1d250d6c..fee4f55ec 100644
--- a/lib/bdev/lvol/vbdev_lvol.c
+++ b/lib/bdev/lvol/vbdev_lvol.c
@@ -600,6 +600,12 @@ vbdev_lvol_dump_info_json(void *ctx, struct spdk_json_write_ctx *w)
 	spdk_json_write_object_begin(w);
 
 	lvs_bdev = vbdev_get_lvs_bdev_by_lvs(lvol->lvol_store);
+	if (!lvs_bdev) {
+		SPDK_ERRLOG("No such lvol store found\n");
+		rc = -ENODEV;
+		goto end;
+	}
+
 	bdev = lvs_bdev->bdev;
 
 	spdk_uuid_fmt_lower(lvol_store_uuid, sizeof(lvol_store_uuid), &lvol->lvol_store->uuid);