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Fixed signed integer overflow when loading AVI ODML index.

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This commit is contained in:
Laurent Aimar 2010-02-23 22:43:20 +01:00
parent 07f608d11e
commit 8e16fb45f4
2 changed files with 7 additions and 9 deletions
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8
modules/demux/avi/avi.c
View File

@ -2180,12 +2180,11 @@ static void __Parse_indx( demux_t *p_demux,
{
demux_sys_t *p_sys = p_demux->p_sys;
avi_entry_t index;
int32_t i;
msg_Dbg( p_demux, "loading subindex(0x%x) %d entries", p_indx->i_indextype, p_indx->i_entriesinuse );
if( p_indx->i_indexsubtype == 0 )
{
for( i = 0; i < p_indx->i_entriesinuse; i++ )
for( unsigned i = 0; i < p_indx->i_entriesinuse; i++ )
{
index.i_id = p_indx->i_id;
index.i_flags = p_indx->idx.std[i].i_size & 0x80000000 ? 0 : AVIIF_KEYFRAME;
@ -2197,7 +2196,7 @@ static void __Parse_indx( demux_t *p_demux,
}
else if( p_indx->i_indexsubtype == AVI_INDEX_2FIELD )
{
for( i = 0; i < p_indx->i_entriesinuse; i++ )
for( unsigned i = 0; i < p_indx->i_entriesinuse; i++ )
{
index.i_id = p_indx->i_id;
index.i_flags = p_indx->idx.field[i].i_size & 0x80000000 ? 0 : AVIIF_KEYFRAME;
@ -2217,7 +2216,6 @@ static void AVI_IndexLoad_indx( demux_t *p_demux )
{
demux_sys_t *p_sys = p_demux->p_sys;
unsigned int i_stream;
int32_t i;
avi_chunk_list_t *p_riff;
avi_chunk_list_t *p_hdrl;
@ -2248,7 +2246,7 @@ static void AVI_IndexLoad_indx( demux_t *p_demux )
else if( p_indx->i_indextype == AVI_INDEX_OF_INDEXES )
{
avi_chunk_t ck_sub;
for( i = 0; i < p_indx->i_entriesinuse; i++ )
for( unsigned i = 0; i < p_indx->i_entriesinuse; i++ )
{
if( stream_Seek( p_demux->s, p_indx->idx.super[i].i_offset )||
AVI_ChunkRead( p_demux->s, &ck_sub, NULL ) )

8
modules/demux/avi/libavi.h
View File

@ -174,10 +174,10 @@ typedef struct
typedef struct avi_chunk_indx_s
{
AVI_CHUNK_COMMON
int16_t i_longsperentry;
int8_t i_indexsubtype;
int8_t i_indextype;
int32_t i_entriesinuse;
int16_t i_longsperentry;
int8_t i_indexsubtype;
int8_t i_indextype;
uint32_t i_entriesinuse;
vlc_fourcc_t i_id;
int64_t i_baseoffset;