From b1b45ac9d445752e7cb0e10b2b9ee9aa4023e3a0 Mon Sep 17 00:00:00 2001 From: James Almer Date: Wed, 21 Jun 2023 17:10:47 -0300 Subject: [PATCH] avcodec/evc_frame_merge: ensure the assembled buffer fits in an AVPacket Signed-off-by: James Almer --- libavcodec/evc_frame_merge_bsf.c | 12 ++++++++++-- 1 file changed, 10 insertions(+), 2 deletions(-) diff --git a/libavcodec/evc_frame_merge_bsf.c b/libavcodec/evc_frame_merge_bsf.c index 121f93c0b0..3e1258c6c9 100644 --- a/libavcodec/evc_frame_merge_bsf.c +++ b/libavcodec/evc_frame_merge_bsf.c @@ -199,8 +199,16 @@ static int evc_frame_merge_filter(AVBSFContext *bsf, AVPacket *out) au_end_found = err; nalu_size += EVC_NALU_LENGTH_PREFIX_SIZE; + + data_size = ctx->au_buffer.data_size + nalu_size; + if (data_size > INT_MAX - AV_INPUT_BUFFER_PADDING_SIZE) { + av_log(bsf, AV_LOG_ERROR, "Assembled packet is too big\n"); + err = AVERROR(ERANGE); + goto end; + } + buffer = av_fast_realloc(ctx->au_buffer.data, &ctx->au_buffer.capacity, - ctx->au_buffer.data_size + nalu_size); + data_size); if (!buffer) { av_freep(&ctx->au_buffer.data); err = AVERROR_INVALIDDATA; @@ -210,7 +218,7 @@ static int evc_frame_merge_filter(AVBSFContext *bsf, AVPacket *out) ctx->au_buffer.data = buffer; memcpy(ctx->au_buffer.data + ctx->au_buffer.data_size, in->data, nalu_size); - ctx->au_buffer.data_size += nalu_size; + ctx->au_buffer.data_size = data_size; in->data += nalu_size; in->size -= nalu_size;