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Add buffer length checks to every typefinding function

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Original commit message from CVS:
Add buffer length checks to every typefinding function
This commit is contained in:
David Schleef 2003-07-24 08:49:42 +00:00
parent 7bea2b377a
commit 322baf19c8
4 changed files with 17 additions and 2 deletions
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7
ext/dv/gstdvdec.c
View file

@ -161,9 +161,14 @@ GST_PAD_TEMPLATE_FACTORY ( audio_src_temp,
static GstCaps* static GstCaps*
dv_type_find (GstBuffer *buf, gpointer private) dv_type_find (GstBuffer *buf, gpointer private)
{ {
guint32 head = GUINT32_FROM_BE(*((guint32 *)GST_BUFFER_DATA(buf))); guint32 head;
GstCaps *new = NULL; GstCaps *new = NULL;
if (GST_BUFFER_SIZE (buf) < 5)
return NULL;
head = GUINT32_FROM_BE(*((guint32 *)GST_BUFFER_DATA(buf)));
/* check for DIF and DV flag */ /* check for DIF and DV flag */
if ((head & 0xffffff00) == 0x1f070000 && !(GST_BUFFER_DATA(buf)[4] & 0x01)) { if ((head & 0xffffff00) == 0x1f070000 && !(GST_BUFFER_DATA(buf)[4] & 0x01)) {
gchar *format; gchar *format;

6
ext/flac/gstflac.c
View file

@ -71,8 +71,12 @@ static GstTypeDefinition flacdefinition = {
static GstCaps* static GstCaps*
flac_type_find (GstBuffer *buf, gpointer private) flac_type_find (GstBuffer *buf, gpointer private)
{ {
guint32 head = GUINT32_FROM_BE (*((guint32 *)GST_BUFFER_DATA (buf))); guint32 head;
if (GST_BUFFER_SIZE (buf) < 4)
return NULL;
head = GUINT32_FROM_BE (*((guint32 *)GST_BUFFER_DATA (buf)));
if (head != 0x664C6143) if (head != 0x664C6143)
return NULL; return NULL;

3
gst/auparse/gstauparse.c
View file

@ -47,6 +47,9 @@ au_type_find (GstBuffer *buf, gpointer private)
GstCaps *new = NULL; GstCaps *new = NULL;
gulong *head = (gulong *) GST_BUFFER_DATA (buf); gulong *head = (gulong *) GST_BUFFER_DATA (buf);
if (GST_BUFFER_SIZE (buf) < 4)
return NULL;
if (*head == 0x2e736e64 || *head == 0x646e732e) if (*head == 0x2e736e64 || *head == 0x646e732e)
new = gst_caps_new ("au_type_find", "audio/au", NULL); new = gst_caps_new ("au_type_find", "audio/au", NULL);

3
gst/avi/gstavidemux.c
View file

@ -181,6 +181,9 @@ avi_type_find (GstBuffer *buf,
GST_DEBUG ("avi_demux: typefind"); GST_DEBUG ("avi_demux: typefind");
if (GST_BUFFER_SIZE (buf) < 12)
return NULL;
if (GUINT32_FROM_LE (((guint32 *)data)[0]) != GST_RIFF_TAG_RIFF) if (GUINT32_FROM_LE (((guint32 *)data)[0]) != GST_RIFF_TAG_RIFF)
return NULL; return NULL;
if (GUINT32_FROM_LE (((guint32 *)data)[2]) != GST_RIFF_RIFF_AVI) if (GUINT32_FROM_LE (((guint32 *)data)[2]) != GST_RIFF_RIFF_AVI)