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qtdemux: add qt_atom_parse_has_remaining() to avoid overflows with _get_remaining()

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This commit is contained in:
Tim-Philipp Müller 2009-08-20 01:39:17 +01:00
parent a16feec38e
commit 9da3ed6491
3 changed files with 30 additions and 23 deletions
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7
gst/qtdemux/qtatomparser.h
View file

@ -38,6 +38,13 @@ qt_atom_parser_get_remaining (QtAtomParser * parser)
return parser->size - parser->byte;
}
static inline gboolean
qt_atom_parser_has_remaining (QtAtomParser * parser, guint64 min_remaining)
{
return G_LIKELY (parser->size >= min_remaining) &&
G_LIKELY ((parser->size - min_remaining) >= parser->byte);
}
static inline gboolean
qt_atom_parser_skip (QtAtomParser * parser, guint nbytes)
{

12
gst/qtdemux/qtdemux.c
View file

@ -3573,7 +3573,7 @@ qtdemux_parse_samples (GstQTDemux * qtdemux, QtDemuxStream * stream,
/* set the sample sizes */
if (sample_size == 0) {
/* different sizes for each sample */
if (qt_atom_parser_get_remaining (&stsz) < 4 * (n_samples))
if (!qt_atom_parser_has_remaining (&stsz, 4 * n_samples))
goto corrupt_file;
for (i = 0; i < n_samples; i++) {
@ -3592,7 +3592,7 @@ qtdemux_parse_samples (GstQTDemux * qtdemux, QtDemuxStream * stream,
!qt_atom_parser_get_uint32 (&stsc, &n_samples_per_chunk))
goto corrupt_file;
if (qt_atom_parser_get_remaining (&stsc) < 12 * n_samples_per_chunk)
if (!qt_atom_parser_has_remaining (&stsc, 12 * n_samples_per_chunk))
goto corrupt_file;
index = 0;
@ -3665,7 +3665,7 @@ qtdemux_parse_samples (GstQTDemux * qtdemux, QtDemuxStream * stream,
GST_LOG_OBJECT (qtdemux, "%u timestamp blocks", n_sample_times);
/* make sure there's enough data */
if (qt_atom_parser_get_remaining (&stts) < (n_sample_times * (2 * 4)))
if (!qt_atom_parser_has_remaining (&stts, n_sample_times * (2 * 4)))
goto corrupt_file;
timestamp = 0;
@ -3732,7 +3732,7 @@ qtdemux_parse_samples (GstQTDemux * qtdemux, QtDemuxStream * stream,
stream->all_keyframe = TRUE;
} else {
/* make sure there's enough data */
if (qt_atom_parser_get_remaining (&stss) < (n_sample_syncs * 4))
if (!qt_atom_parser_has_remaining (&stss, n_sample_syncs * 4))
goto corrupt_file;
for (i = 0; i < n_sample_syncs; i++) {
/* note that the first sample is index 1, not 0 */
@ -3755,7 +3755,7 @@ qtdemux_parse_samples (GstQTDemux * qtdemux, QtDemuxStream * stream,
* samples */
} else {
/* make sure there's enough data */
if (qt_atom_parser_get_remaining (&stps) < (n_sample_syncs * 4))
if (!qt_atom_parser_has_remaining (&stps, n_sample_syncs * 4))
goto corrupt_file;
for (i = 0; i < n_sample_syncs; i++) {
/* note that the first sample is index 1, not 0 */
@ -3802,7 +3802,7 @@ qtdemux_parse_samples (GstQTDemux * qtdemux, QtDemuxStream * stream,
sample_index = 0;
timestamp = 0;
if (qt_atom_parser_get_remaining (&stsc) < 12 * n_samples_per_chunk)
if (!qt_atom_parser_has_remaining (&stsc, 12 * n_samples_per_chunk))
goto corrupt_file;
for (i = 0; i < n_samples_per_chunk; i++) {

34
gst/qtdemux/qtdemux_dump.c
View file

@ -36,7 +36,7 @@
gboolean
qtdemux_dump_mvhd (GstQTDemux * qtdemux, QtAtomParser * data, int depth)
{
if (qt_atom_parser_get_remaining (data) < 100)
if (!qt_atom_parser_has_remaining (data, 100))
return FALSE;
GST_LOG ("%*s version/flags: %08x", depth, "", GET_UINT32 (data));
@ -112,7 +112,7 @@ qtdemux_dump_elst (GstQTDemux * qtdemux, QtAtomParser * data, int depth)
GST_LOG ("%*s version/flags: %08x", depth, "", ver_flags);
GST_LOG ("%*s n entries: %d", depth, "", num_entries);
if (qt_atom_parser_get_remaining (data) < (num_entries * (4 + 4 + 4)))
if (!qt_atom_parser_has_remaining (data, num_entries * (4 + 4 + 4)))
return FALSE;
for (i = 0; i < num_entries; i++) {
@ -163,7 +163,7 @@ qtdemux_dump_hdlr (GstQTDemux * qtdemux, QtAtomParser * data, int depth)
guint32 version, type, subtype, manufacturer;
const gchar *name;
if (qt_atom_parser_get_remaining (data) < (4 + 4 + 4 + 4 + 4 + 4 + 1))
if (!qt_atom_parser_has_remaining (data, 4 + 4 + 4 + 4 + 4 + 4 + 1))
return FALSE;
version = GET_UINT32 (data);
@ -189,7 +189,7 @@ qtdemux_dump_hdlr (GstQTDemux * qtdemux, QtAtomParser * data, int depth)
guint len;
len = qt_atom_parser_get_uint8_unchecked (data);
if (qt_atom_parser_get_remaining (data) >= len) {
if (qt_atom_parser_has_remaining (data, len)) {
memcpy (buf, qt_atom_parser_peek_bytes_unchecked (data), len);
buf[len] = '\0';
GST_LOG ("%*s name: %s", depth, "", buf);
@ -201,7 +201,7 @@ qtdemux_dump_hdlr (GstQTDemux * qtdemux, QtAtomParser * data, int depth)
gboolean
qtdemux_dump_vmhd (GstQTDemux * qtdemux, QtAtomParser * data, int depth)
{
if (qt_atom_parser_get_remaining (data) < (4 + 4))
if (!qt_atom_parser_has_remaining (data, 4 + 4))
return FALSE;
GST_LOG ("%*s version/flags: %08x", depth, "", GET_UINT32 (data));
@ -301,7 +301,7 @@ qtdemux_dump_stts (GstQTDemux * qtdemux, QtAtomParser * data, int depth)
GST_LOG ("%*s version/flags: %08x", depth, "", ver_flags);
GST_LOG ("%*s n entries: %d", depth, "", num_entries);
if (qt_atom_parser_get_remaining (data) < (num_entries * (4 + 4)))
if (!qt_atom_parser_has_remaining (data, num_entries * (4 + 4)))
return FALSE;
for (i = 0; i < num_entries; i++) {
@ -323,7 +323,7 @@ qtdemux_dump_stps (GstQTDemux * qtdemux, QtAtomParser * data, int depth)
GST_LOG ("%*s version/flags: %08x", depth, "", ver_flags);
GST_LOG ("%*s n entries: %d", depth, "", num_entries);
if (qt_atom_parser_get_remaining (data) < (num_entries * 4))
if (!qt_atom_parser_has_remaining (data, num_entries * 4))
return FALSE;
for (i = 0; i < num_entries; i++) {
@ -344,7 +344,7 @@ qtdemux_dump_stss (GstQTDemux * qtdemux, QtAtomParser * data, int depth)
GST_LOG ("%*s version/flags: %08x", depth, "", ver_flags);
GST_LOG ("%*s n entries: %d", depth, "", num_entries);
if (qt_atom_parser_get_remaining (data) < (num_entries * 4))
if (!qt_atom_parser_has_remaining (data, num_entries * 4))
return FALSE;
for (i = 0; i < num_entries; i++) {
@ -365,7 +365,7 @@ qtdemux_dump_stsc (GstQTDemux * qtdemux, QtAtomParser * data, int depth)
GST_LOG ("%*s version/flags: %08x", depth, "", ver_flags);
GST_LOG ("%*s n entries: %d", depth, "", num_entries);
if (qt_atom_parser_get_remaining (data) < (num_entries * (4 + 4 + 4)))
if (!qt_atom_parser_has_remaining (data, num_entries * (4 + 4 + 4)))
return FALSE;
for (i = 0; i < num_entries; i++) {
@ -394,8 +394,8 @@ qtdemux_dump_stsz (GstQTDemux * qtdemux, QtAtomParser * data, int depth)
GST_LOG ("%*s n entries: %d", depth, "", num_entries);
#if 0
if (qt_atom_parser_get_remaining (data) < (num_entries * 4)))
goto too_short;
if (!qt_atom_parser_has_remaining (data, num_entries * 4)))
return FALSE;
for (i = 0; i < num_entries; i++) {
GST_LOG ("%*s sample size: %u", depth, "", GET_UINT32 (data));
}
@ -416,7 +416,7 @@ qtdemux_dump_stco (GstQTDemux * qtdemux, QtAtomParser * data, int depth)
GST_LOG ("%*s version/flags: %08x", depth, "", ver_flags);
GST_LOG ("%*s n entries: %d", depth, "", num_entries);
if (qt_atom_parser_get_remaining (data) < (num_entries * 4))
if (!qt_atom_parser_has_remaining (data, num_entries * 4))
return FALSE;
for (i = 0; i < num_entries; i++) {
@ -437,7 +437,7 @@ qtdemux_dump_ctts (GstQTDemux * qtdemux, QtAtomParser * data, int depth)
GST_LOG ("%*s version/flags: %08x", depth, "", ver_flags);
GST_LOG ("%*s n entries: %d", depth, "", num_entries);
if (qt_atom_parser_get_remaining (data) < (num_entries * (4 + 4)))
if (!qt_atom_parser_has_remaining (data, num_entries * (4 + 4)))
return FALSE;
for (i = 0; i < num_entries; i++) {
@ -460,7 +460,7 @@ qtdemux_dump_co64 (GstQTDemux * qtdemux, QtAtomParser * data, int depth)
GST_LOG ("%*s version/flags: %08x", depth, "", ver_flags);
GST_LOG ("%*s n entries: %d", depth, "", num_entries);
if (qt_atom_parser_get_remaining (data) < (num_entries * 8))
if (!qt_atom_parser_has_remaining (data, num_entries * 8))
return FALSE;
for (i = 0; i < num_entries; i++) {
@ -473,7 +473,7 @@ qtdemux_dump_co64 (GstQTDemux * qtdemux, QtAtomParser * data, int depth)
gboolean
qtdemux_dump_dcom (GstQTDemux * qtdemux, QtAtomParser * data, int depth)
{
if (qt_atom_parser_get_remaining (data) < 4)
if (!qt_atom_parser_has_remaining (data, 4))
return FALSE;
GST_LOG ("%*s compression type: %" GST_FOURCC_FORMAT, depth, "",
@ -484,7 +484,7 @@ qtdemux_dump_dcom (GstQTDemux * qtdemux, QtAtomParser * data, int depth)
gboolean
qtdemux_dump_cmvd (GstQTDemux * qtdemux, QtAtomParser * data, int depth)
{
if (qt_atom_parser_get_remaining (data) < 4)
if (!qt_atom_parser_has_remaining (data, 4))
return FALSE;
GST_LOG ("%*s length: %d", depth, "", GET_UINT32 (data));
@ -508,7 +508,7 @@ static gboolean
qtdemux_node_dump_foreach (GNode * node, gpointer qtdemux)
{
QtAtomParser parser;
guint8 *buffer = (guint8 *) node->data;
guint8 *buffer = (guint8 *) node->data; // FIXME: move to byte reader
guint32 node_length;
guint32 fourcc;
const QtNodeType *type;