From 76f4b9cbdf4fd9c9f3a016607ee905b9dd04f1f0 Mon Sep 17 00:00:00 2001
From: Mike Gerdts <mgerdts@nvidia.com>
Date: Tue, 17 Jan 2023 10:12:48 -0600
Subject: [PATCH] lvol: do not reference blob after closing it

Once an lvol's blob is closed, the lvol should not retain a reference.
Dereferencing lvol->blob could result in a use after free.

Signed-off-by: Mike Gerdts <mgerdts@nvidia.com>
Change-Id: Ia96a5a488fc96d642aa4cde83c6efa5cff88b068
Reviewed-on: https://review.spdk.io/gerrit/c/spdk/spdk/+/16426
Tested-by: SPDK CI Jenkins <sys_sgci@intel.com>
Reviewed-by: Jim Harris <james.r.harris@intel.com>
Community-CI: Mellanox Build Bot
Reviewed-by: Ben Walker <benjamin.walker@intel.com>
---
 lib/lvol/lvol.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/lib/lvol/lvol.c b/lib/lvol/lvol.c
index ce7e887ab..62ade59a1 100644
--- a/lib/lvol/lvol.c
+++ b/lib/lvol/lvol.c
@@ -979,6 +979,7 @@ lvol_close_blob_cb(void *cb_arg, int lvolerrno)
 
 	lvol->ref_count--;
 	lvol->action_in_progress = false;
+	lvol->blob = NULL;
 	SPDK_INFOLOG(lvol, "Lvol %s closed\n", lvol->unique_id);
 
 end: