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qemu: fix CVE-2020-13361

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(From OE-Core rev: 0e4985236dd7d2e92576fb30b70bc434a7ecd367)

Signed-off-by: Lee Chee Yang <chee.yang.lee@intel.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>
(cherry picked from commit 2dcef5dfb5c4c57fd793d04ac936a9ff73aae844)
Signed-off-by: Steve Sakoman <steve@sakoman.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>
This commit is contained in:
Lee Chee Yang
2020-06-01 21:40:37 +08:00
committed by Richard Purdie
parent f59c4f0b83
commit c9a3c7dd65
2 changed files with 62 additions and 0 deletions
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1
meta/recipes-devtools/qemu/qemu.inc
View File

@@ -38,6 +38,7 @@ SRC_URI = "https://download.qemu.org/${BPN}-${PV}.tar.xz \
file://0001-qemu-Do-not-include-file-if-not-exists.patch \
file://CVE-2020-11102.patch \
file://CVE-2020-11869.patch \
file://CVE-2020-13361.patch \
"
UPSTREAM_CHECK_REGEX = "qemu-(?P<pver>\d+(\.\d+)+)\.tar"

61
meta/recipes-devtools/qemu/qemu/CVE-2020-13361.patch Normal file
View File

@@ -0,0 +1,61 @@
From 369ff955a8497988d079c4e3fa1e93c2570c1c69 Mon Sep 17 00:00:00 2001
From: Prasad J Pandit <pjp@fedoraproject.org>
Date: Fri, 15 May 2020 01:36:08 +0530
Subject: [PATCH] es1370: check total frame count against current frame
A guest user may set channel frame count via es1370_write()
such that, in es1370_transfer_audio(), total frame count
'size' is lesser than the number of frames that are processed
'cnt'.
int cnt = d->frame_cnt >> 16;
int size = d->frame_cnt & 0xffff;
if (size < cnt), it results in incorrect calculations leading
to OOB access issue(s). Add check to avoid it.
Reported-by: Ren Ding <rding@gatech.edu>
Reported-by: Hanqing Zhao <hanqing@gatech.edu>
Signed-off-by: Prasad J Pandit <pjp@fedoraproject.org>
Message-id: 20200514200608.1744203-1-ppandit@redhat.com
Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
Upstream-Status: Backport [https://lists.gnu.org/archive/html/qemu-devel/2020-05/msg03983.html]
CVE: CVE-2020-13361
Signed-off-by: Chee Yang Lee <chee.yang.lee@intel.com>
---
hw/audio/es1370.c | 7 +++++--
1 file changed, 5 insertions(+), 2 deletions(-)
diff --git a/hw/audio/es1370.c b/hw/audio/es1370.c
index 89c4dabcd44..5f8a83ff562 100644
--- a/hw/audio/es1370.c
+++ b/hw/audio/es1370.c
@@ -643,6 +643,9 @@ static void es1370_transfer_audio (ES1370State *s, struct chan *d, int loop_sel,
int csc_bytes = (csc + 1) << d->shift;
int cnt = d->frame_cnt >> 16;
int size = d->frame_cnt & 0xffff;
+ if (size < cnt) {
+ return;
+ }
int left = ((size - cnt + 1) << 2) + d->leftover;
int transferred = 0;
int temp = MIN (max, MIN (left, csc_bytes));
@@ -651,7 +654,7 @@ static void es1370_transfer_audio (ES1370State *s, struct chan *d, int loop_sel,
addr += (cnt << 2) + d->leftover;
if (index == ADC_CHANNEL) {
- while (temp) {
+ while (temp > 0) {
int acquired, to_copy;
to_copy = MIN ((size_t) temp, sizeof (tmpbuf));
@@ -669,7 +672,7 @@ static void es1370_transfer_audio (ES1370State *s, struct chan *d, int loop_sel,
else {
SWVoiceOut *voice = s->dac_voice[index];
- while (temp) {
+ while (temp > 0) {
int copied, to_copy;
to_copy = MIN ((size_t) temp, sizeof (tmpbuf));