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Avoid overflows in the padding checks by doing the check slightly

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differently.
Add a unit test to check for correct behaviour.
This commit is contained in:
Wim Taymans 2009-01-21 13:09:29 +01:00 committed by Wim Taymans
parent 28418d1fec
commit 9ce042e2a7
2 changed files with 24 additions and 2 deletions
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4
gst-libs/gst/rtp/gstrtpbuffer.c
View file

@ -345,8 +345,8 @@ gst_rtp_buffer_validate_data (guint8 * data, guint len)
else
padding = 0;
/* check if padding not bigger than packet and header */
if (G_UNLIKELY (len - header_len < padding))
/* check if padding and header not bigger than packet length */
if (G_UNLIKELY (len < padding + header_len))
goto wrong_padding;
return TRUE;

22
tests/check/libs/rtp.c
View file

@ -132,6 +132,27 @@ GST_START_TEST (test_rtp_buffer)
GST_END_TEST;
GST_START_TEST (test_rtp_buffer_validate_corrupt)
{
GstBuffer *buf;
guint8 corrupt_rtp_packet[58] =
{
0x90, 0x7a, 0xbf, 0x28, 0x3a, 0x8a, 0x0a, 0xf4, 0x69, 0x6b, 0x76, 0xc0,
0x21, 0xe0, 0xe0, 0x60, 0x81, 0x10, 0x84, 0x30, 0x21, 0x52, 0x06, 0xc2,
0xb8, 0x30, 0x10, 0x4c, 0x08, 0x62, 0x67, 0xc2, 0x6e, 0x1a, 0x53, 0x3f,
0xaf, 0xd6, 0x1b, 0x29, 0x40, 0xe0, 0xa5, 0x83, 0x01, 0x4b, 0x04, 0x02,
0xb0, 0x97, 0x63, 0x08, 0x10, 0x4b, 0x43, 0x85, 0x37, 0x2c
};
buf = gst_buffer_new ();
GST_BUFFER_DATA (buf) = corrupt_rtp_packet;
GST_BUFFER_SIZE (buf) = sizeof (corrupt_rtp_packet);
fail_if (gst_rtp_buffer_validate (buf));
gst_buffer_unref (buf);
}
GST_END_TEST;
GST_START_TEST (test_rtp_buffer_set_extension_data)
{
GstBuffer *buf;
@ -368,6 +389,7 @@ rtp_suite (void)
suite_add_tcase (s, tc_chain);
tcase_add_test (tc_chain, test_rtp_buffer);
tcase_add_test (tc_chain, test_rtp_buffer_validate_corrupt);
tcase_add_test (tc_chain, test_rtp_buffer_set_extension_data);
tcase_add_test (tc_chain, test_rtp_seqnum_compare);