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| author | Michael Niedermayer <michael@niedermayer.cc> | 2017-06-10 19:43:25 +0200 |
|---|---|---|
| committer | Michael Niedermayer <michael@niedermayer.cc> | 2017-06-16 01:05:30 +0200 |
| commit | ef157cec81308476deaf129f799884dea7aac339 (patch) | |
| tree | 367169ab4f110a5c0f9b51288542d511a4f3b54b | |
| parent | 1f1b73cb1666172eba2ab955f56dfd023f6894ba (diff) | |
| download | ffmpeg-ef157cec81308476deaf129f799884dea7aac339.tar.gz | |
avcodec/flicvideo: Fix runtime error: signed integer overflow: 4864 * 459296 cannot be represented in type 'int'
Fixes: 2174/clusterfuzz-testcase-minimized-5739234533048320
Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/projects/ffmpeg
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
(cherry picked from commit 90e8317b3b33dcb54ae01e419d85cbbfbd874963)
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
| -rw-r--r-- | libavcodec/flicvideo.c | 10 |
1 files changed, 10 insertions, 0 deletions
diff --git a/libavcodec/flicvideo.c b/libavcodec/flicvideo.c index 192d4fe8a7..157f0c31a7 100644 --- a/libavcodec/flicvideo.c +++ b/libavcodec/flicvideo.c @@ -275,10 +275,14 @@ static int flic_decode_frame_8BPP(AVCodecContext *avctx, while (compressed_lines > 0) { if (bytestream2_tell(&g2) + 2 > stream_ptr_after_chunk) break; + if (y_ptr > pixel_limit) + return AVERROR_INVALIDDATA; line_packets = bytestream2_get_le16(&g2); if ((line_packets & 0xC000) == 0xC000) { // line skip opcode line_packets = -line_packets; + if (line_packets > s->avctx->height) + return AVERROR_INVALIDDATA; y_ptr += line_packets * s->frame->linesize[0]; } else if ((line_packets & 0xC000) == 0x4000) { av_log(avctx, AV_LOG_ERROR, "Undefined opcode (%x) in DELTA_FLI\n", line_packets); @@ -327,6 +331,8 @@ static int flic_decode_frame_8BPP(AVCodecContext *avctx, case FLI_LC: /* line compressed */ starting_line = bytestream2_get_le16(&g2); + if (starting_line >= s->avctx->height) + return AVERROR_INVALIDDATA; y_ptr = 0; y_ptr += starting_line * s->frame->linesize[0]; @@ -563,9 +569,13 @@ static int flic_decode_frame_15_16BPP(AVCodecContext *avctx, while (compressed_lines > 0) { if (bytestream2_tell(&g2) + 2 > stream_ptr_after_chunk) break; + if (y_ptr > pixel_limit) + return AVERROR_INVALIDDATA; line_packets = bytestream2_get_le16(&g2); if (line_packets < 0) { line_packets = -line_packets; + if (line_packets > s->avctx->height) + return AVERROR_INVALIDDATA; y_ptr += line_packets * s->frame->linesize[0]; } else { compressed_lines--; |