File 0217-pvrdma-Fix-the-ring-init-error-flow.patch of Package qemu.28156

From: Marcel Apfelbaum <marcel.apfelbaum@gmail.com>
Date: Wed, 30 Jun 2021 14:52:46 +0300
Subject: pvrdma: Fix the ring init error flow (CVE-2021-3608)
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Git-commit: 66ae37d8cc313f89272e711174a846a229bcdbd3
References: CVE-2021-3608 bsc#1187538

Do not unmap uninitialized dma addresses.

Fixes: CVE-2021-3608
Reviewed-by: VictorV (Kunlun Lab) <vv474172261@gmail.com>
Tested-by: VictorV (Kunlun Lab) <vv474172261@gmail.com>
Signed-off-by: Marcel Apfelbaum <marcel@redhat.com>
Message-Id: <20210630115246.2178219-1-marcel@redhat.com>
Tested-by: Yuval Shaia <yuval.shaia.ml@gmail.com>
Reviewed-by: Yuval Shaia <yuval.shaia.ml@gmail.com>
Reviewed-by: Philippe Mathieu-Daudé <philmd@redhat.com>
Signed-off-by: Marcel Apfelbaum <marcel.apfelbaum@gmail.com>
Signed-off-by: Jose R Ziviani <jose.ziviani@suse.com>
---
 hw/rdma/vmw/pvrdma_dev_ring.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/hw/rdma/vmw/pvrdma_dev_ring.c b/hw/rdma/vmw/pvrdma_dev_ring.c
index e8e5b502f6e844691539f6e23a61..ad1ae79c89b9f7467485c9fcc552 100644
--- a/hw/rdma/vmw/pvrdma_dev_ring.c
+++ b/hw/rdma/vmw/pvrdma_dev_ring.c
@@ -42,7 +42,7 @@ int pvrdma_ring_init(PvrdmaRing *ring, const char *name, PCIDevice *dev,
     atomic_set(&ring->ring_state->cons_head, 0);
     */
     ring->npages = npages;
-    ring->pages = g_malloc(npages * sizeof(void *));
+    ring->pages = g_malloc0(npages * sizeof(void *));
 
     for (i = 0; i < npages; i++) {
         if (!tbl[i]) {