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Accepting request 1035935 from home:AZhou:branches:multimedia:libs

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- Add ffmpeg-CVE-2022-3964.patch: Backport from upstream to fix
  out of bounds read in update_block_in_prev_frame() (bsc#1205388).

OBS-URL: https://build.opensuse.org/request/show/1035935
OBS-URL: https://build.opensuse.org/package/show/multimedia:libs/ffmpeg-4?expand=0&rev=188
This commit is contained in:
Jan Engelhardt 2022-11-16 11:55:32 +00:00 committed by Git OBS Bridge
parent 037338de44
commit fcff620a44
3 changed files with 77 additions and 0 deletions
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6
ffmpeg-4.changes
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@ -1,3 +1,9 @@
-------------------------------------------------------------------
Wed Nov 16 01:31:02 UTC 2022 - Alynx Zhou <alynx.zhou@suse.com>
- Add ffmpeg-CVE-2022-3964.patch: Backport from upstream to fix
out of bounds read in update_block_in_prev_frame() (bsc#1205388).
-------------------------------------------------------------------
Mon Oct 10 11:18:30 UTC 2022 - Bjørn Lie <bjorn.lie@gmail.com>

1
ffmpeg-4.spec
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@ -120,6 +120,7 @@ Patch8: vmaf-trim-usr-local.patch
Patch9: ffmpeg-4.4-CVE-2020-22046.patch
Patch10: ffmpeg-chromium.patch
Patch11: ffmpeg-libglslang-detection.patch
Patch12: ffmpeg-CVE-2022-3964.patch
BuildRequires: ladspa-devel
BuildRequires: libgsm-devel
BuildRequires: libmp3lame-devel

70
ffmpeg-CVE-2022-3964.patch Normal file
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@ -0,0 +1,70 @@
diff --unified --recursive --text --new-file --color ffmpeg-4.4.old/libavcodec/rpzaenc.c ffmpeg-4.4.new/libavcodec/rpzaenc.c
--- ffmpeg-4.4.old/libavcodec/rpzaenc.c 2022-11-15 14:41:42.262978968 +0800
+++ ffmpeg-4.4.new/libavcodec/rpzaenc.c 2022-11-15 14:43:37.183516204 +0800
@@ -204,7 +204,7 @@
// loop thru and compare pixels
for (y = 0; y < bi->block_height; y++) {
- for (x = 0; x < bi->block_width; x++){
+ for (x = 0; x < bi->block_width; x++) {
// TODO: optimize
min_r = FFMIN(R(block_ptr[x]), min_r);
min_g = FFMIN(G(block_ptr[x]), min_g);
@@ -276,7 +276,7 @@
return -1;
for (i = 0; i < bi->block_height; i++) {
- for (j = 0; j < bi->block_width; j++){
+ for (j = 0; j < bi->block_width; j++) {
x = GET_CHAN(block_ptr[j], xchannel);
y = GET_CHAN(block_ptr[j], ychannel);
sumx += x;
@@ -323,7 +323,7 @@
int max_err = 0;
for (i = 0; i < bi->block_height; i++) {
- for (j = 0; j < bi->block_width; j++){
+ for (j = 0; j < bi->block_width; j++) {
int x_inc, lin_y, lin_x;
x = GET_CHAN(block_ptr[j], xchannel);
y = GET_CHAN(block_ptr[j], ychannel);
@@ -418,7 +418,9 @@
uint16_t *dest_pixels,
const BlockInfo *bi, int block_counter)
{
- for (int y = 0; y < 4; y++) {
+ const int y_size = FFMIN(4, bi->image_height - bi->row * 4);
+
+ for (int y = 0; y < y_size; y++) {
memcpy(dest_pixels, src_pixels, 8);
dest_pixels += bi->rowstride;
src_pixels += bi->rowstride;
@@ -728,13 +730,14 @@
if (err > s->sixteen_color_thresh) { // DO SIXTEEN COLOR BLOCK
uint16_t *row_ptr;
- int rgb555;
+ int y_size, rgb555;
block_offset = get_block_info(&bi, block_counter);
row_ptr = &src_pixels[block_offset];
+ y_size = FFMIN(4, bi.image_height - bi.row * 4);
- for (int y = 0; y < 4; y++) {
+ for (int y = 0; y < y_size; y++) {
for (int x = 0; x < 4; x++){
rgb555 = row_ptr[x] & ~0x8000;
@@ -743,6 +746,11 @@
row_ptr += bi.rowstride;
}
+ for (int y = y_size; y < 4; y++) {
+ for (int x = 0; x < 4; x++)
+ put_bits(&s->pb, 16, 0);
+ }
+
block_counter++;
} else { // FOUR COLOR BLOCK
block_counter += encode_four_color_block(min_color, max_color,