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Fix heap buffer overflow in libopenapv encoder #212

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Fix heap buffer overflow in libopenapv encoder #212

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1 change: 1 addition & 0 deletions src/oapv.c
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Original file line number Diff line number Diff line change
Expand Up @@ -1171,6 +1171,7 @@ static int enc_frame(oapve_ctx_t *ctx, oapv_bs_t *bs)
/****************************************************/

for(int i = 0; i < ctx->num_tiles; i++) {
oapv_assert_gv(bs_tile_pos + ctx->tile[i].bs_size <= bs->end, ret, OAPV_ERR_OUT_OF_BS_BUF, ERR);
oapv_mcpy(bs_tile_pos, ctx->tile[i].bs_buf, ctx->tile[i].bs_size);
bs_tile_pos = bs_tile_pos + ctx->tile[i].bs_size;
ctx->fh.tile_size[i] = ctx->tile[i].bs_size - OAPV_TILE_SIZE_LEN;
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32 changes: 20 additions & 12 deletions src/oapv_vlc.c
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Original file line number Diff line number Diff line change
Expand Up @@ -37,23 +37,31 @@
#if ENABLE_ENCODER
///////////////////////////////////////////////////////////////////////////////
#define BSW_FLUSH_4BYTE(bs) { \
*(bs)->cur++ = ((bs)->code >> 24) & 0xFF; \
*(bs)->cur++ = ((bs)->code >> 16) & 0xFF; \
*(bs)->cur++ = ((bs)->code >> 8) & 0xFF; \
*(bs)->cur++ = ((bs)->code) & 0xFF; \
if ((bs)->cur + 4 <= (bs)->end) { \
*(bs)->cur++ = ((bs)->code >> 24) & 0xFF; \
*(bs)->cur++ = ((bs)->code >> 16) & 0xFF; \
*(bs)->cur++ = ((bs)->code >> 8) & 0xFF; \
*(bs)->cur++ = ((bs)->code) & 0xFF; \
} else { \
(bs)->cur += 4; \
} \
(bs)->code = 0; \
(bs)->leftbits = 32; \
}

#define BSW_FLUSH_8BYTE(bs) { \
*(bs)->cur++ = ((bs)->code >> 56) & 0xFF; \
*(bs)->cur++ = ((bs)->code >> 48) & 0xFF; \
*(bs)->cur++ = ((bs)->code >> 40) & 0xFF; \
*(bs)->cur++ = ((bs)->code >> 32) & 0xFF; \
*(bs)->cur++ = ((bs)->code >> 24) & 0xFF; \
*(bs)->cur++ = ((bs)->code >> 16) & 0xFF; \
*(bs)->cur++ = ((bs)->code >> 8) & 0xFF; \
*(bs)->cur++ = ((bs)->code) & 0xFF; \
if ((bs)->cur + 8 <= (bs)->end) { \
*(bs)->cur++ = ((bs)->code >> 56) & 0xFF; \
*(bs)->cur++ = ((bs)->code >> 48) & 0xFF; \
*(bs)->cur++ = ((bs)->code >> 40) & 0xFF; \
*(bs)->cur++ = ((bs)->code >> 32) & 0xFF; \
*(bs)->cur++ = ((bs)->code >> 24) & 0xFF; \
*(bs)->cur++ = ((bs)->code >> 16) & 0xFF; \
*(bs)->cur++ = ((bs)->code >> 8) & 0xFF; \
*(bs)->cur++ = ((bs)->code) & 0xFF; \
} else { \
(bs)->cur += 8; \
} \
(bs)->code = 0; \
(bs)->leftbits = 64; \
}
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