98 lines
4.2 KiB
Diff
98 lines
4.2 KiB
Diff
From fba19d6c4975c1628ce47473a72b95e4e17992b4 Mon Sep 17 00:00:00 2001
|
|
From: Wim Taymans <wtaymans@redhat.com>
|
|
Date: Mon, 26 May 2025 15:42:55 +0200
|
|
Subject: [PATCH] h265parser: Fix max_dec_pic_buffering_minus1 bound check
|
|
|
|
Allowed max value is MaxDpbSize - 1
|
|
---
|
|
gst-libs/gst/codecparsers/gsth265parser.c | 32 ++++++++++++++++++++---
|
|
1 file changed, 28 insertions(+), 4 deletions(-)
|
|
|
|
diff --git a/gst-libs/gst/codecparsers/gsth265parser.c b/gst-libs/gst/codecparsers/gsth265parser.c
|
|
index 2e8ef182b..200a06796 100644
|
|
--- a/gst-libs/gst/codecparsers/gsth265parser.c
|
|
+++ b/gst-libs/gst/codecparsers/gsth265parser.c
|
|
@@ -75,6 +75,8 @@
|
|
GST_DEBUG_CATEGORY_STATIC (h265_parser_debug);
|
|
#define GST_CAT_DEFAULT h265_parser_debug
|
|
|
|
+#define MAX_DPB_SIZE 16
|
|
+
|
|
static gboolean initialized = FALSE;
|
|
#define INITIALIZE_DEBUG_CATEGORY \
|
|
if (!initialized) { \
|
|
@@ -1506,7 +1508,7 @@ gst_h265_parse_vps (GstH265NalUnit * nalu, GstH265VPS * vps)
|
|
for (i =
|
|
(vps->sub_layer_ordering_info_present_flag ? 0 :
|
|
vps->max_sub_layers_minus1); i <= vps->max_sub_layers_minus1; i++) {
|
|
- READ_UE_MAX (&nr, vps->max_dec_pic_buffering_minus1[i], G_MAXUINT32 - 1);
|
|
+ READ_UE_MAX (&nr, vps->max_dec_pic_buffering_minus1[i], MAX_DPB_SIZE - 1);
|
|
READ_UE_MAX (&nr, vps->max_num_reorder_pics[i],
|
|
vps->max_dec_pic_buffering_minus1[i]);
|
|
READ_UE_MAX (&nr, vps->max_latency_increase_plus1[i], G_MAXUINT32 - 1);
|
|
@@ -1702,7 +1704,7 @@ gst_h265_parse_sps (GstH265Parser * parser, GstH265NalUnit * nalu,
|
|
for (i =
|
|
(sps->sub_layer_ordering_info_present_flag ? 0 :
|
|
sps->max_sub_layers_minus1); i <= sps->max_sub_layers_minus1; i++) {
|
|
- READ_UE_MAX (&nr, sps->max_dec_pic_buffering_minus1[i], 16);
|
|
+ READ_UE_MAX (&nr, sps->max_dec_pic_buffering_minus1[i], MAX_DPB_SIZE - 1);
|
|
READ_UE_MAX (&nr, sps->max_num_reorder_pics[i],
|
|
sps->max_dec_pic_buffering_minus1[i]);
|
|
READ_UE_MAX (&nr, sps->max_latency_increase_plus1[i], G_MAXUINT32 - 1);
|
|
@@ -2107,6 +2109,8 @@ gst_h265_parser_parse_slice_hdr (GstH265Parser * parser,
|
|
|
|
if ((nalu->type != GST_H265_NAL_SLICE_IDR_W_RADL)
|
|
&& (nalu->type != GST_H265_NAL_SLICE_IDR_N_LP)) {
|
|
+ const GstH265ShortTermRefPicSet *ref_pic_sets = NULL;
|
|
+
|
|
READ_UINT16 (&nr, slice->pic_order_cnt_lsb,
|
|
(sps->log2_max_pic_order_cnt_lsb_minus4 + 4));
|
|
|
|
@@ -2116,21 +2120,41 @@ gst_h265_parser_parse_slice_hdr (GstH265Parser * parser,
|
|
(&slice->short_term_ref_pic_sets, &nr,
|
|
sps->num_short_term_ref_pic_sets, sps))
|
|
goto error;
|
|
+ ref_pic_sets = &slice->short_term_ref_pic_sets;
|
|
} else if (sps->num_short_term_ref_pic_sets > 1) {
|
|
const guint n = ceil_log2 (sps->num_short_term_ref_pic_sets);
|
|
READ_UINT8 (&nr, slice->short_term_ref_pic_set_idx, n);
|
|
CHECK_ALLOWED_MAX (slice->short_term_ref_pic_set_idx,
|
|
sps->num_short_term_ref_pic_sets - 1);
|
|
+ ref_pic_sets =
|
|
+ &sps->short_term_ref_pic_set[slice->short_term_ref_pic_set_idx];
|
|
+ } else {
|
|
+ ref_pic_sets = &sps->short_term_ref_pic_set[0];
|
|
}
|
|
|
|
if (sps->long_term_ref_pics_present_flag) {
|
|
guint32 limit;
|
|
+ gint max_num_long_term_pics = 0;
|
|
|
|
- if (sps->num_long_term_ref_pics_sps > 0)
|
|
+ if (sps->num_long_term_ref_pics_sps > 0) {
|
|
READ_UE_MAX (&nr, slice->num_long_term_sps,
|
|
sps->num_long_term_ref_pics_sps);
|
|
+ }
|
|
+
|
|
+ /* Calculated upper bound num_long_term_pics can have. 7.4.7.1 */
|
|
+ max_num_long_term_pics =
|
|
+ /* sps_max_dec_pic_buffering_minus1[TemporalId], allowed max is
|
|
+ * MaxDpbSize - 1 */
|
|
+ MAX_DPB_SIZE - 1
|
|
+ - (gint) slice->num_long_term_sps
|
|
+ - (gint) ref_pic_sets->NumNegativePics
|
|
+ - (gint) ref_pic_sets->NumPositivePics;
|
|
+ if (max_num_long_term_pics < 0) {
|
|
+ GST_WARNING ("Invalid stream, too many reference pictures");
|
|
+ goto error;
|
|
+ }
|
|
|
|
- READ_UE_MAX (&nr, slice->num_long_term_pics, 16);
|
|
+ READ_UE_MAX (&nr, slice->num_long_term_pics, max_num_long_term_pics);
|
|
limit = slice->num_long_term_sps + slice->num_long_term_pics;
|
|
for (i = 0; i < limit; i++) {
|
|
if (i < slice->num_long_term_sps) {
|
|
--
|
|
2.49.0
|
|
|