Message ID | 20190917234354.1766-1-michael@niedermayer.cc |
---|---|
State | Accepted |
Commit | 87ddf9f1ef17726fd4235f2e7aed8334d0ff231b |
Headers | show |
diff --git a/libavcodec/4xm.c b/libavcodec/4xm.c index 1f4e2aee24..336c651d31 100644 --- a/libavcodec/4xm.c +++ b/libavcodec/4xm.c @@ -525,6 +525,10 @@ static int decode_i_block(FourXContext *f, int16_t *block) break; if (code == 0xf0) { i += 16; + if (i >= 64) { + av_log(f->avctx, AV_LOG_ERROR, "run %d overflow\n", i); + return 0; + } } else { if (code & 0xf) { level = get_xbits(&f->gb, code & 0xf);
Fixes: Infinite loop Fixes: signed integer overflow: 2147483644 + 16 cannot be represented in type 'int' Fixes: 16169/clusterfuzz-testcase-minimized-ffmpeg_AV_CODEC_ID_FOURXM_fuzzer-5662570416963584 Fixes: 16782/clusterfuzz-testcase-minimized-ffmpeg_AV_CODEC_ID_FOURXM_fuzzer-5743163859271680 Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/projects/ffmpeg Signed-off-by: Michael Niedermayer <michael@niedermayer.cc> --- libavcodec/4xm.c | 4 ++++ 1 file changed, 4 insertions(+)