[Dunfell][PATCH 4/4] qemu: fix CVE-2021-3608

["Armin Kuster" <akuster808@gmail.com>]

From: Sakib Sajal <sakib.sajal@windriver.com>

Source: http://git.yoctoproject.org/cgit/poky.git
MR: 112749
Type: Security Fix
Disposition: Backport from http://git.yoctoproject.org/cgit/cgit.cgi/poky/commit/meta/recipes-devtools/qemu?h=hardknott&id=f5e77d70e2eb35751f5bad5572b6eb8a3ab14422
ChangeID: 4496341da3af9126c9c67170e1a2cce929c29828
Description:

(From OE-Core rev: 5e05ee8ff363eac84edec568039b86bcd716c6ce)

Signed-off-by: Sakib Sajal <sakib.sajal@windriver.com>
Signed-off-by: Anuj Mittal <anuj.mittal@intel.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>
(cherry picked from commit f5e77d70e2eb35751f5bad5572b6eb8a3ab14422)
[Refreshed patch]
Signed-off-by: Armin Kuster <akuster@mvista.com>
---
 meta/recipes-devtools/qemu/qemu.inc           |  1 +
 .../qemu/qemu/CVE-2021-3608.patch             | 40 +++++++++++++++++++
 2 files changed, 41 insertions(+)
 create mode 100644 meta/recipes-devtools/qemu/qemu/CVE-2021-3608.patch

diff --git a/meta/recipes-devtools/qemu/qemu.inc b/meta/recipes-devtools/qemu/qemu.inc
index 6066418a7b..c8c170dda0 100644
--- a/meta/recipes-devtools/qemu/qemu.inc
+++ b/meta/recipes-devtools/qemu/qemu.inc
@@ -83,6 +83,7 @@ SRC_URI = "https://download.qemu.org/${BPN}-${PV}.tar.xz \
            file://CVE-2021-3527-2.patch \
            file://CVE-2021-3582.patch \
            file://CVE-2021-3607.patch \
+           file://CVE-2021-3608.patch \
            "
 UPSTREAM_CHECK_REGEX = "qemu-(?P<pver>\d+(\.\d+)+)\.tar"
 
diff --git a/meta/recipes-devtools/qemu/qemu/CVE-2021-3608.patch b/meta/recipes-devtools/qemu/qemu/CVE-2021-3608.patch
new file mode 100644
index 0000000000..7055ec3d23
--- /dev/null
+++ b/meta/recipes-devtools/qemu/qemu/CVE-2021-3608.patch
@@ -0,0 +1,40 @@
+From 66ae37d8cc313f89272e711174a846a229bcdbd3 Mon Sep 17 00:00:00 2001
+From: Marcel Apfelbaum <marcel.apfelbaum@gmail.com>
+Date: Wed, 30 Jun 2021 14:52:46 +0300
+Subject: [PATCH] pvrdma: Fix the ring init error flow (CVE-2021-3608)
+MIME-Version: 1.0
+Content-Type: text/plain; charset=UTF-8
+Content-Transfer-Encoding: 8bit
+
+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>
+
+CVE: CVE-2021-3608
+Upstream-Status: Backport [66ae37d8cc313f89272e711174a846a229bcdbd3]
+Signed-off-by: Sakib Sajal <sakib.sajal@windriver.com>
+---
+ hw/rdma/vmw/pvrdma_dev_ring.c | 2 +-
+ 1 file changed, 1 insertion(+), 1 deletion(-)
+
+Index: qemu-4.2.0/hw/rdma/vmw/pvrdma_dev_ring.c
+===================================================================
+--- qemu-4.2.0.orig/hw/rdma/vmw/pvrdma_dev_ring.c
++++ qemu-4.2.0/hw/rdma/vmw/pvrdma_dev_ring.c
+@@ -41,7 +41,7 @@ int pvrdma_ring_init(PvrdmaRing *ring, c
+     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]) {
-- 
2.25.1