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Merge commit 'fix integer promotion bug in partition size check'

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Change-Id: I4081917b46013fa8f4218cade8bd12cb2d013aee
This commit is contained in:
John Koleszar 2010-11-05 16:49:17 -04:00
commit 4d1b0d2a2d
2 changed files with 12 additions and 4 deletions
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6
vp8/decoder/decodframe.c
View File

@ -461,7 +461,8 @@ static void setup_token_decoder(VP8D_COMP *pbi,
partition_size = user_data_end - partition;
}
if (user_data_end - partition < partition_size)
if (partition + partition_size > user_data_end
|| partition + partition_size < partition)
vpx_internal_error(&pc->error, VPX_CODEC_CORRUPT_FRAME,
"Truncated packet or corrupt partition "
"%d length", i + 1);
@ -580,7 +581,8 @@ int vp8_decode_frame(VP8D_COMP *pbi)
(data[0] | (data[1] << 8) | (data[2] << 16)) >> 5;
data += 3;
if (data_end - data < first_partition_length_in_bytes)
if (data + first_partition_length_in_bytes > data_end
|| data + first_partition_length_in_bytes < data)
vpx_internal_error(&pc->error, VPX_CODEC_CORRUPT_FRAME,
"Truncated packet or corrupt partition 0 length");
vp8_setup_version(pc);

10
vp8/vp8_dx_iface.c
View File

@ -253,8 +253,11 @@ static vpx_codec_err_t vp8_peek_si(const uint8_t *data,
unsigned int data_sz,
vpx_codec_stream_info_t *si)
{
vpx_codec_err_t res = VPX_CODEC_OK;
if(data + data_sz <= data)
res = VPX_CODEC_INVALID_PARAM;
else
{
/* Parse uncompresssed part of key frame header.
* 3 bytes:- including version, frame type and an offset
@ -331,7 +334,10 @@ static vpx_codec_err_t vp8_decode(vpx_codec_alg_priv_t *ctx,
ctx->img_avail = 0;
/* Determine the stream parameters */
/* Determine the stream parameters. Note that we rely on peek_si to
* validate that we have a buffer that does not wrap around the top
* of the heap.
*/
if (!ctx->si.h)
res = ctx->base.iface->dec.peek_si(data, data_sz, &ctx->si);