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[FFmpeg-devel,3/8] avcodec/utils: Use more bits for intermediate for AV_CODEC_ID_ADPCM_MS

Message ID 20210201223116.11378-3-michael@niedermayer.cc
State Accepted
Commit 0f441b9063281d8ef5d4c30b10379d08aad8924f
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Series [FFmpeg-devel,1/8] avcodec/cbs_sei_syntax_template: Check for non negativity before setting size_t bits_left
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Commit Message

Michael Niedermayer Feb. 1, 2021, 10:31 p.m. UTC
Fixes: signed integer overflow: 1172577312 * 2 cannot be represented in type 'int'
Fixes: 29924/clusterfuzz-testcase-minimized-ffmpeg_dem_BOA_fuzzer-4882912874594304

Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/projects/ffmpeg
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
---
 libavcodec/utils.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

Comments

Michael Niedermayer March 15, 2021, 8:54 p.m. UTC | #1
On Mon, Feb 01, 2021 at 11:31:11PM +0100, Michael Niedermayer wrote:
> Fixes: signed integer overflow: 1172577312 * 2 cannot be represented in type 'int'
> Fixes: 29924/clusterfuzz-testcase-minimized-ffmpeg_dem_BOA_fuzzer-4882912874594304
> 
> Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/projects/ffmpeg
> Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
> ---
>  libavcodec/utils.c | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)

will apply

[...]
diff mbox series

Patch

diff --git a/libavcodec/utils.c b/libavcodec/utils.c
index a1ae9cab18..8be4c4949c 100644
--- a/libavcodec/utils.c
+++ b/libavcodec/utils.c
@@ -1786,7 +1786,7 @@  static int get_audio_frame_duration(enum AVCodecID id, int sr, int ch, int ba,
                 case AV_CODEC_ID_ADPCM_IMA_RAD:
                     return blocks * ((ba - 4 * ch) * 2 / ch);
                 case AV_CODEC_ID_ADPCM_MS:
-                    return blocks * (2 + (ba - 7 * ch) * 2 / ch);
+                    return blocks * (2 + (ba - 7 * ch) * 2LL / ch);
                 case AV_CODEC_ID_ADPCM_MTAF:
                     return blocks * (ba - 16) * 2 / ch;
                 }