1 files changed, 46 insertions, 0 deletions

diff --git a/meta/recipes-devtools/qemu/qemu/CVE-2020-25085.patch b/meta/recipes-devtools/qemu/qemu/CVE-2020-25085.patch
new file mode 100644
index 0000000000..be19256cef
--- /dev/null
+++ b/meta/recipes-devtools/qemu/qemu/CVE-2020-25085.patch
@@ -0,0 +1,46 @@
+From dfba99f17feb6d4a129da19d38df1bcd8579d1c3 Mon Sep 17 00:00:00 2001
+From: =?UTF-8?q?Philippe=20Mathieu-Daud=C3=A9?= <f4bug@amsat.org>
+Date: Tue, 1 Sep 2020 15:22:06 +0200
+Subject: [PATCH] hw/sd/sdhci: Fix DMA Transfer Block Size field
+MIME-Version: 1.0
+Content-Type: text/plain; charset=UTF-8
+Content-Transfer-Encoding: 8bit
+
+The 'Transfer Block Size' field is 12-bit wide.
+
+See section '2.2.2. Block Size Register (Offset 004h)' in datasheet.
+
+Two different bug reproducer available:
+- https://bugs.launchpad.net/qemu/+bug/1892960
+- https://ruhr-uni-bochum.sciebo.de/s/NNWP2GfwzYKeKwE?path=%2Fsdhci_oob_write1
+
+Cc: qemu-stable@nongnu.org
+Buglink: https://bugs.launchpad.net/qemu/+bug/1892960
+Fixes: d7dfca0807a ("hw/sdhci: introduce standard SD host controller")
+Reported-by: Alexander Bulekov <alxndr@bu.edu>
+Signed-off-by: Philippe Mathieu-Daudé <f4bug@amsat.org>
+Reviewed-by: Prasad J Pandit <pjp@fedoraproject.org>
+Tested-by: Alexander Bulekov <alxndr@bu.edu>
+Message-Id: <20200901140411.112150-3-f4bug@amsat.org>
+
+Upstream-Status: Backport
+CVE: CVE-2020-25085
+Signed-off-by: Armin Kuster <akuster@mvista.com>
+
+---
+ hw/sd/sdhci.c | 2 +-
+ 1 file changed, 1 insertion(+), 1 deletion(-)
+
+Index: qemu-4.2.0/hw/sd/sdhci.c
+===================================================================
+--- qemu-4.2.0.orig/hw/sd/sdhci.c
++++ qemu-4.2.0/hw/sd/sdhci.c
+@@ -1129,7 +1129,7 @@ sdhci_write(void *opaque, hwaddr offset,
+         break;
+     case SDHC_BLKSIZE:
+         if (!TRANSFERRING_DATA(s->prnsts)) {
+-            MASKED_WRITE(s->blksize, mask, value);
++            MASKED_WRITE(s->blksize, mask, extract32(value, 0, 12));
+             MASKED_WRITE(s->blkcnt, mask >> 16, value >> 16);
+         }
+