61 lines
2.1 KiB
Diff
61 lines
2.1 KiB
Diff
|
From 22bbf1a90ac11fe30e1665c09f9ad904683b6ddc 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 1/9] 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>
|
||
|
|
---
|
||
|
|
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 260c142b70..eff7d03ae1 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 = audio_MIN (max, audio_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 = audio_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 = audio_MIN ((size_t) temp, sizeof (tmpbuf));
|
||
|
|
--
|
||
|
|
2.25.1
|
||
|
|
|