diff mbox

[FFmpeg-devel,2/2] avcodec/truemotion2: Propagate out of bounds error from GET_TOK()

Message ID 20180410212540.13543-2-michael@niedermayer.cc
State Accepted
Commit f6304af2341d0cee51c2116766622e3ac567b7a0
Headers show

Commit Message

Michael Niedermayer April 10, 2018, 9:25 p.m. UTC 
Fixes: Timeout
Fixes: 6389/clusterfuzz-testcase-minimized-ffmpeg_AV_CODEC_ID_TRUEMOTION2_fuzzer-5695918121680896

Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/projects/ffmpeg
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
---
 libavcodec/truemotion2.c | 6 ++++++
 1 file changed, 6 insertions(+)

Comments

Michael Niedermayer April 13, 2018, 8:11 p.m. UTC | #1 
On Tue, Apr 10, 2018 at 11:25:40PM +0200, Michael Niedermayer wrote:
> Fixes: Timeout
> Fixes: 6389/clusterfuzz-testcase-minimized-ffmpeg_AV_CODEC_ID_TRUEMOTION2_fuzzer-5695918121680896
> 
> Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/projects/ffmpeg
> Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
> ---
>  libavcodec/truemotion2.c | 6 ++++++
>  1 file changed, 6 insertions(+)

will apply

[...]
diff mbox

Patch

diff --git a/libavcodec/truemotion2.c b/libavcodec/truemotion2.c
index 97c38f7f08..f7dbe047c7 100644
--- a/libavcodec/truemotion2.c
+++ b/libavcodec/truemotion2.c
@@ -63,6 +63,7 @@  typedef struct TM2Context {
     AVFrame *pic;
 
     GetBitContext gb;
+    int error;
     BswapDSPContext bdsp;
 
     uint8_t *buffer;
@@ -398,6 +399,7 @@  static inline int GET_TOK(TM2Context *ctx,int type)
 {
     if (ctx->tok_ptrs[type] >= ctx->tok_lens[type]) {
         av_log(ctx->avctx, AV_LOG_ERROR, "Read token from stream %i out of bounds (%i>=%i)\n", type, ctx->tok_ptrs[type], ctx->tok_lens[type]);
+        ctx->error = 1;
         return 0;
     }
     if (type <= TM2_MOT) {
@@ -809,6 +811,8 @@  static int tm2_decode_blocks(TM2Context *ctx, AVFrame *p)
             default:
                 av_log(ctx->avctx, AV_LOG_ERROR, "Skipping unknown block type %i\n", type);
             }
+            if (ctx->error)
+                return AVERROR_INVALIDDATA;
         }
     }
 
@@ -889,6 +893,8 @@  static int decode_frame(AVCodecContext *avctx,
     int offset           = TM2_HEADER_SIZE;
     int i, t, ret;
 
+    l->error = 0;
+
     av_fast_padded_malloc(&l->buffer, &l->buffer_size, buf_size);
     if (!l->buffer) {
         av_log(avctx, AV_LOG_ERROR, "Cannot allocate temporary buffer\n");