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indeo5: dont run the wavelet transform over partially decoded bands.

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This fixes a null pointer dereference.

Found-by: Mateusz "j00ru" Jurczyk and Gynvael Coldwind
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
This commit is contained in:
Michael Niedermayer 2012-04-17 20:02:13 +02:00
parent e90dfa6881
commit a66675268f
1 changed files with 5 additions and 0 deletions
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5
libavcodec/indeo5.c
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@ -78,6 +78,7 @@ typedef struct {
IVIPicConfig pic_conf;
int gop_invalid;
int buf_invalid[3];
} IVI5DecContext;
@ -797,6 +798,7 @@ static int decode_frame(AVCodecContext *avctx, void *data, int *data_size,
//{ START_TIMER;
if (ctx->frame_type != FRAMETYPE_NULL) {
ctx->buf_invalid[ctx->dst_buf] = 1;
for (p = 0; p < 3; p++) {
for (b = 0; b < ctx->planes[p].num_bands; b++) {
result = decode_band(ctx, p, &ctx->planes[p].bands[b], avctx);
@ -807,7 +809,10 @@ static int decode_frame(AVCodecContext *avctx, void *data, int *data_size,
}
}
}
ctx->buf_invalid[ctx->dst_buf] = 0;
}
if (ctx->buf_invalid[ctx->dst_buf])
return -1;
//STOP_TIMER("decode_planes"); }