[PATCH] tcm_vhost: Fix tv_cmd completion -> release SGL memory leak

["Nicholas A. Bellinger" <nab@xxxxxxxxxxxxxxx>]

From: Nicholas Bellinger <nab@xxxxxxxxxxxxxxx>

The SGL memory allocated during vhost_scsi_map_iov_to_sgl() setup was never
getting freed during tv_cmd completion -> release path.  Fix this up by releasing
tv_cmd->tvc_sgl in vhost_scsi_free_cmd() ahead of tv_cmd descriptor free.

Cc: Stefan Hajnoczi <stefanha@xxxxxxxxxxxxxxxxxx>
Cc: Zhi Yong Wu <wuzhy@xxxxxxxxxx>
Cc: Michael S. Tsirkin <mst@xxxxxxxxxx>
Signed-off-by: Nicholas Bellinger <nab@xxxxxxxxxxxxxxx>
---
 drivers/vhost/tcm_vhost.c |    2 ++
 1 files changed, 2 insertions(+), 0 deletions(-)

diff --git a/drivers/vhost/tcm_vhost.c b/drivers/vhost/tcm_vhost.c
index cd86633..9692153 100644
--- a/drivers/vhost/tcm_vhost.c
+++ b/drivers/vhost/tcm_vhost.c
@@ -387,6 +387,8 @@ static void vhost_scsi_free_cmd(struct tcm_vhost_cmd *tv_cmd)
 		u32 i;
 		for (i = 0; i < tv_cmd->tvc_sgl_count; i++)
 			put_page(sg_page(&tv_cmd->tvc_sgl[i]));
+
+		kfree(tv_cmd->tvc_sgl);
 	}
 
 	kfree(tv_cmd);
-- 
1.7.2.5

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