RepoMirrors/ffmpeg
1
0
Fork 0
mirror of https://git.ffmpeg.org/ffmpeg.git synced 2024-12-29 10:52:20 +00:00
Code Issues Projects Releases Wiki Activity

smacker: add sanity check for length in smacker_decode_tree()

Browse Source 
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>

Bug-Id: 1098
Cc: libav-stable@libav.org
Signed-off-by: Sean McGovern <gseanmcg@gmail.com>
This commit is contained in:
Michael Niedermayer 2012-06-21 16:01:52 +02:00 committed by Sean McGovern
parent 17b6c7efb4
commit cd4663dc80
1 changed files with 6 additions and 1 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

7
libavcodec/smacker.c
View File

@ -43,7 +43,7 @@
#define SMKTREE_BITS 9
#define SMK_NODE 0x80000000
#define SMKTREE_DECODE_MAX_RECURSION 32
typedef struct SmackVContext {
AVCodecContext *avctx;
@ -97,6 +97,11 @@ enum SmkBlockTypes {
static int smacker_decode_tree(BitstreamContext *bc, HuffContext *hc,
uint32_t prefix, int length)
{
if (length > SMKTREE_DECODE_MAX_RECURSION) {
av_log(NULL, AV_LOG_ERROR, "Maximum tree recursion level exceeded.\n");
return AVERROR_INVALIDDATA;
}
if (!bitstream_read_bit(bc)) { // Leaf
if(hc->current >= 256){
av_log(NULL, AV_LOG_ERROR, "Tree size exceeded!\n");