1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
|
Fix CVE-2021-3497:
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-3497
https://gstreamer.freedesktop.org/security/sa-2021-0002.html
Patch copied from upstream source repository:
https://gitlab.freedesktop.org/gstreamer/gst-plugins-good/-/commit/9181191511f9c0be6a89c98b311f49d66bd46dc3?merge_request_iid=903
diff --git a/gst/matroska/matroska-demux.c b/gst/matroska/matroska-demux.c
index 467815986c8c3d86fd8906a0d539b34f67d6693e..0e47ee7b5e25ac3331f30439710ae755235f2a22 100644
--- a/gst/matroska/matroska-demux.c
+++ b/gst/matroska/matroska-demux.c
@@ -3851,6 +3851,12 @@ gst_matroska_demux_add_wvpk_header (GstElement * element,
guint32 block_samples, tmp;
gsize size = gst_buffer_get_size (*buf);
+ if (size < 4) {
+ GST_ERROR_OBJECT (element, "Too small wavpack buffer");
+ gst_buffer_unmap (*buf, &map);
+ return GST_FLOW_ERROR;
+ }
+
gst_buffer_extract (*buf, 0, &tmp, sizeof (guint32));
block_samples = GUINT32_FROM_LE (tmp);
/* we need to reconstruct the header of the wavpack block */
@@ -3858,10 +3864,10 @@ gst_matroska_demux_add_wvpk_header (GstElement * element,
/* -20 because ck_size is the size of the wavpack block -8
* and lace_size is the size of the wavpack block + 12
* (the three guint32 of the header that already are in the buffer) */
- wvh.ck_size = size + sizeof (Wavpack4Header) - 20;
+ wvh.ck_size = size + WAVPACK4_HEADER_SIZE - 20;
/* block_samples, flags and crc are already in the buffer */
- newbuf = gst_buffer_new_allocate (NULL, sizeof (Wavpack4Header) - 12, NULL);
+ newbuf = gst_buffer_new_allocate (NULL, WAVPACK4_HEADER_SIZE - 12, NULL);
gst_buffer_map (newbuf, &outmap, GST_MAP_WRITE);
data = outmap.data;
@@ -3886,9 +3892,11 @@ gst_matroska_demux_add_wvpk_header (GstElement * element,
audiocontext->wvpk_block_index += block_samples;
} else {
guint8 *outdata = NULL;
- guint outpos = 0;
- gsize buf_size, size, out_size = 0;
+ gsize buf_size, size;
guint32 block_samples, flags, crc, blocksize;
+ GstAdapter *adapter;
+
+ adapter = gst_adapter_new ();
gst_buffer_map (*buf, &map, GST_MAP_READ);
buf_data = map.data;
@@ -3897,6 +3905,7 @@ gst_matroska_demux_add_wvpk_header (GstElement * element,
if (buf_size < 4) {
GST_ERROR_OBJECT (element, "Too small wavpack buffer");
gst_buffer_unmap (*buf, &map);
+ g_object_unref (adapter);
return GST_FLOW_ERROR;
}
@@ -3918,59 +3927,57 @@ gst_matroska_demux_add_wvpk_header (GstElement * element,
data += 4;
size -= 4;
- if (blocksize == 0 || size < blocksize)
- break;
-
- g_assert ((newbuf == NULL) == (outdata == NULL));
+ if (blocksize == 0 || size < blocksize) {
+ GST_ERROR_OBJECT (element, "Too small wavpack buffer");
+ gst_buffer_unmap (*buf, &map);
+ g_object_unref (adapter);
+ return GST_FLOW_ERROR;
+ }
- if (newbuf == NULL) {
- out_size = sizeof (Wavpack4Header) + blocksize;
- newbuf = gst_buffer_new_allocate (NULL, out_size, NULL);
+ g_assert (newbuf == NULL);
- gst_buffer_copy_into (newbuf, *buf,
- GST_BUFFER_COPY_TIMESTAMPS | GST_BUFFER_COPY_FLAGS, 0, -1);
+ newbuf =
+ gst_buffer_new_allocate (NULL, WAVPACK4_HEADER_SIZE + blocksize,
+ NULL);
+ gst_buffer_map (newbuf, &outmap, GST_MAP_WRITE);
+ outdata = outmap.data;
+
+ outdata[0] = 'w';
+ outdata[1] = 'v';
+ outdata[2] = 'p';
+ outdata[3] = 'k';
+ outdata += 4;
+
+ GST_WRITE_UINT32_LE (outdata, blocksize + WAVPACK4_HEADER_SIZE - 8);
+ GST_WRITE_UINT16_LE (outdata + 4, wvh.version);
+ GST_WRITE_UINT8 (outdata + 6, wvh.track_no);
+ GST_WRITE_UINT8 (outdata + 7, wvh.index_no);
+ GST_WRITE_UINT32_LE (outdata + 8, wvh.total_samples);
+ GST_WRITE_UINT32_LE (outdata + 12, wvh.block_index);
+ GST_WRITE_UINT32_LE (outdata + 16, block_samples);
+ GST_WRITE_UINT32_LE (outdata + 20, flags);
+ GST_WRITE_UINT32_LE (outdata + 24, crc);
+ outdata += 28;
+
+ memcpy (outdata, data, blocksize);
- outpos = 0;
- gst_buffer_map (newbuf, &outmap, GST_MAP_WRITE);
- outdata = outmap.data;
- } else {
- gst_buffer_unmap (newbuf, &outmap);
- out_size += sizeof (Wavpack4Header) + blocksize;
- gst_buffer_set_size (newbuf, out_size);
- gst_buffer_map (newbuf, &outmap, GST_MAP_WRITE);
- outdata = outmap.data;
- }
+ gst_buffer_unmap (newbuf, &outmap);
+ gst_adapter_push (adapter, newbuf);
+ newbuf = NULL;
- outdata[outpos] = 'w';
- outdata[outpos + 1] = 'v';
- outdata[outpos + 2] = 'p';
- outdata[outpos + 3] = 'k';
- outpos += 4;
-
- GST_WRITE_UINT32_LE (outdata + outpos,
- blocksize + sizeof (Wavpack4Header) - 8);
- GST_WRITE_UINT16_LE (outdata + outpos + 4, wvh.version);
- GST_WRITE_UINT8 (outdata + outpos + 6, wvh.track_no);
- GST_WRITE_UINT8 (outdata + outpos + 7, wvh.index_no);
- GST_WRITE_UINT32_LE (outdata + outpos + 8, wvh.total_samples);
- GST_WRITE_UINT32_LE (outdata + outpos + 12, wvh.block_index);
- GST_WRITE_UINT32_LE (outdata + outpos + 16, block_samples);
- GST_WRITE_UINT32_LE (outdata + outpos + 20, flags);
- GST_WRITE_UINT32_LE (outdata + outpos + 24, crc);
- outpos += 28;
-
- memmove (outdata + outpos, data, blocksize);
- outpos += blocksize;
data += blocksize;
size -= blocksize;
}
gst_buffer_unmap (*buf, &map);
- gst_buffer_unref (*buf);
- if (newbuf)
- gst_buffer_unmap (newbuf, &outmap);
+ newbuf = gst_adapter_take_buffer (adapter, gst_adapter_available (adapter));
+ g_object_unref (adapter);
+ gst_buffer_copy_into (newbuf, *buf,
+ GST_BUFFER_COPY_TIMESTAMPS | GST_BUFFER_COPY_FLAGS, 0, -1);
+ gst_buffer_unref (*buf);
*buf = newbuf;
+
audiocontext->wvpk_block_index += block_samples;
}
diff --git a/gst/matroska/matroska-ids.h b/gst/matroska/matroska-ids.h
index 429213f778063ba0063944ab64ad60373bbce5ee..8d4a685a910ec13100a3c3d156b2412d28ec0522 100644
--- a/gst/matroska/matroska-ids.h
+++ b/gst/matroska/matroska-ids.h
@@ -688,6 +688,8 @@ typedef struct _Wavpack4Header {
guint32 crc; /* crc for actual decoded data */
} Wavpack4Header;
+#define WAVPACK4_HEADER_SIZE (32)
+
typedef enum {
GST_MATROSKA_TRACK_ENCODING_SCOPE_FRAME = (1<<0),
GST_MATROSKA_TRACK_ENCODING_SCOPE_CODEC_DATA = (1<<1),
|
