diff options
Diffstat (limited to 'poky/meta/recipes-devtools/qemu/qemu/CVE-2020-25085.patch')
| -rw-r--r-- | poky/meta/recipes-devtools/qemu/qemu/CVE-2020-25085.patch | 46 |
1 files changed, 46 insertions, 0 deletions
diff --git a/poky/meta/recipes-devtools/qemu/qemu/CVE-2020-25085.patch b/poky/meta/recipes-devtools/qemu/qemu/CVE-2020-25085.patch new file mode 100644 index 0000000000..be19256cef --- /dev/null +++ b/poky/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); + } + |