Accepting request 1036210 from multimedia:libs

- Add ffmpeg-CVE-2022-3964.patch: Backport from upstream to fix
  out of bounds read in update_block_in_prev_frame() (bsc#1205388). (forwarded request 1035935 from AZhou)

OBS-URL: https://build.opensuse.org/request/show/1036210
OBS-URL: https://build.opensuse.org/package/show/openSUSE:Factory/ffmpeg-4?expand=0&rev=55

ffmpeg-4.changes

@@ -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>
 

ffmpeg-4.spec

@@ -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

ffmpeg-CVE-2022-3964.patch

@@ -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,