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[FFmpeg-devel,2/3] avcodec/wmavoice: Check sample_rate

Message ID 20191023225427.2572-2-michael@niedermayer.cc
State Accepted
Commit 55c97a763783540ee48a326a3e82fbdea42f8280
Headers show

Commit Message

Michael Niedermayer Oct. 23, 2019, 10:54 p.m. UTC 
Fixes: left shift of 538976288 by 8 places cannot be represented in type 'int'
Fixes: 18376/clusterfuzz-testcase-minimized-ffmpeg_AV_CODEC_ID_WMAVOICE_fuzzer-5741645391200256

Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/projects/ffmpeg
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
---
 libavcodec/wmavoice.c | 3 +++
 1 file changed, 3 insertions(+)
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Patch

diff --git a/libavcodec/wmavoice.c b/libavcodec/wmavoice.c
index 68bb65986e..4c147fe04f 100644
--- a/libavcodec/wmavoice.c
+++ b/libavcodec/wmavoice.c
@@ -433,6 +433,9 @@  static av_cold int wmavoice_decode_init(AVCodecContext *ctx)
         return AVERROR_INVALIDDATA;
     }
 
+    if (ctx->sample_rate >= INT_MAX / (256 * 37))
+        return AVERROR_INVALIDDATA;
+
     s->min_pitch_val    = ((ctx->sample_rate << 8)      /  400 + 50) >> 8;
     s->max_pitch_val    = ((ctx->sample_rate << 8) * 37 / 2000 + 50) >> 8;
     pitch_range         = s->max_pitch_val - s->min_pitch_val;