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[1/3] tcm_vhost: Fix tv_cmd leak in vhost_scsi_handle_vq

Message ID 1365564191-20928-2-git-send-email-asias@redhat.com (mailing list archive)
State New, archived
Headers show

Commit Message

Asias He April 10, 2013, 3:23 a.m. UTC 
If we fail to submit the allocated tv_vmd to tcm_vhost_submission_work,
we will leak the tv_vmd. Free tv_vmd on fail path.

Signed-off-by: Asias He <asias@redhat.com>
---
 drivers/vhost/tcm_vhost.c | 9 +++++++--
 1 file changed, 7 insertions(+), 2 deletions(-)
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Patch

diff --git a/drivers/vhost/tcm_vhost.c b/drivers/vhost/tcm_vhost.c
index 10f2d30..e8d1a1f 100644
--- a/drivers/vhost/tcm_vhost.c
+++ b/drivers/vhost/tcm_vhost.c
@@ -715,7 +715,7 @@  static void vhost_scsi_handle_vq(struct vhost_scsi *vs,
 				" exceeds SCSI_MAX_VARLEN_CDB_SIZE: %d\n",
 				scsi_command_size(tv_cmd->tvc_cdb),
 				TCM_VHOST_MAX_CDB_SIZE);
-			break; /* TODO */
+			goto err;
 		}
 		tv_cmd->tvc_lun = ((v_req.lun[2] << 8) | v_req.lun[3]) & 0x3FFF;
 
@@ -728,7 +728,7 @@  static void vhost_scsi_handle_vq(struct vhost_scsi *vs,
 					data_direction == DMA_TO_DEVICE);
 			if (unlikely(ret)) {
 				vq_err(vq, "Failed to map iov to sgl\n");
-				break; /* TODO */
+				goto err;
 			}
 		}
 
@@ -749,6 +749,11 @@  static void vhost_scsi_handle_vq(struct vhost_scsi *vs,
 	}
 
 	mutex_unlock(&vq->mutex);
+	return;
+
+err:
+	vhost_scsi_free_cmd(tv_cmd);
+	mutex_unlock(&vq->mutex);
 }
 
 static void vhost_scsi_ctl_handle_kick(struct vhost_work *work)