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[PULL,1/6] vhost-user-scsi: Fix memleaks in vus_proc_req()

Message ID 20201202101655.122214-2-mst@redhat.com
State New
Headers show
Series [PULL,1/6] vhost-user-scsi: Fix memleaks in vus_proc_req() | expand

Commit Message

Michael S. Tsirkin Dec. 2, 2020, 11:03 a.m. UTC 
From: Alex Chen <alex.chen@huawei.com>

The 'elem' is allocated memory in vu_queue_pop(), and its memory should be
freed in all error branches after vu_queue_pop().
In addition, in order to free the 'elem' memory outside of while(1) loop, move
the definition of 'elem' to the beginning of vus_proc_req().

Reported-by: Euler Robot <euler.robot@huawei.com>
Signed-off-by: Alex Chen <alex.chen@huawei.com>
Reviewed-by: Raphael Norwitz <raphael.norwitz@nutanix.com>
Message-Id: <20201125013055.34147-1-alex.chen@huawei.com>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
---
 contrib/vhost-user-scsi/vhost-user-scsi.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)
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Patch

diff --git a/contrib/vhost-user-scsi/vhost-user-scsi.c b/contrib/vhost-user-scsi/vhost-user-scsi.c
index 0f9ba4b2a2..4639440a70 100644
--- a/contrib/vhost-user-scsi/vhost-user-scsi.c
+++ b/contrib/vhost-user-scsi/vhost-user-scsi.c
@@ -232,6 +232,7 @@  static void vus_proc_req(VuDev *vu_dev, int idx)
     VugDev *gdev;
     VusDev *vdev_scsi;
     VuVirtq *vq;
+    VuVirtqElement *elem = NULL;
 
     assert(vu_dev);
 
@@ -248,7 +249,6 @@  static void vus_proc_req(VuDev *vu_dev, int idx)
     g_debug("Got kicked on vq[%d]@%p", idx, vq);
 
     while (1) {
-        VuVirtqElement *elem;
         VirtIOSCSICmdReq *req;
         VirtIOSCSICmdResp *rsp;
 
@@ -288,6 +288,7 @@  static void vus_proc_req(VuDev *vu_dev, int idx)
 
         free(elem);
     }
+    free(elem);
 }
 
 static void vus_queue_set_started(VuDev *vu_dev, int idx, bool started)