1 files changed, 54 insertions, 0 deletions

diff --git a/meta/recipes-devtools/qemu/qemu/CVE-2021-20196_1.patch b/meta/recipes-devtools/qemu/qemu/CVE-2021-20196_1.patch
new file mode 100644
index 0000000000..8b1ad0423b
--- /dev/null
+++ b/meta/recipes-devtools/qemu/qemu/CVE-2021-20196_1.patch
@@ -0,0 +1,54 @@
+From e907ff3d4cb7fd20d402f45355059e67d0dc93e7 Mon Sep 17 00:00:00 2001
+From: =?UTF-8?q?Philippe=20Mathieu-Daud=C3=A9?= <philmd@redhat.com>
+Date: Wed, 24 Nov 2021 17:15:34 +0100
+Subject: [PATCH 11/12] hw/block/fdc: Extract blk_create_empty_drive()
+MIME-Version: 1.0
+Content-Type: text/plain; charset=UTF-8
+Content-Transfer-Encoding: 8bit
+
+We are going to re-use this code in the next commit,
+so extract it as a new blk_create_empty_drive() function.
+
+Inspired-by: Hanna Reitz <hreitz@redhat.com>
+Signed-off-by: Philippe Mathieu-Daudé <philmd@redhat.com>
+Message-id: 20211124161536.631563-2-philmd@redhat.com
+Signed-off-by: John Snow <jsnow@redhat.com>
+
+Upstream-Status: Backport [b154791e7b6d4ca5cdcd54443484d97360bd7ad2]
+CVE: CVE-2021-20196
+
+Signed-off-by: Sakib Sajal <sakib.sajal@windriver.com>
+---
+ hw/block/fdc.c | 9 +++++++--
+ 1 file changed, 7 insertions(+), 2 deletions(-)
+
+diff --git a/hw/block/fdc.c b/hw/block/fdc.c
+index 4c2c35e22..854b4f172 100644
+--- a/hw/block/fdc.c
++++ b/hw/block/fdc.c
+@@ -61,6 +61,12 @@
+     } while (0)
+ 
+ 
++/* Anonymous BlockBackend for empty drive */
++static BlockBackend *blk_create_empty_drive(void)
++{
++    return blk_new(qemu_get_aio_context(), 0, BLK_PERM_ALL);
++}
++
+ /********************************************************/
+ /* qdev floppy bus                                      */
+ 
+@@ -543,8 +549,7 @@ static void floppy_drive_realize(DeviceState *qdev, Error **errp)
+     }
+ 
+     if (!dev->conf.blk) {
+-        /* Anonymous BlockBackend for an empty drive */
+-        dev->conf.blk = blk_new(qemu_get_aio_context(), 0, BLK_PERM_ALL);
++        dev->conf.blk = blk_create_empty_drive();
+         ret = blk_attach_dev(dev->conf.blk, qdev);
+         assert(ret == 0);
+ 
+-- 
+2.31.1
+