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| author | Michael Niedermayer <michael@niedermayer.cc> | 2020-05-31 14:59:02 +0200 |
|---|---|---|
| committer | Michael Niedermayer <michael@niedermayer.cc> | 2020-06-07 22:01:12 +0200 |
| commit | 6d96bae9c480e020e9f51fabd5642d7ae6020943 (patch) | |
| tree | 0ef53378719da8eceae0753cce8200a96dbc715c /libavcodec/adpcm.c | |
| parent | bd6336b9702fc36683acda9ef1d70a6b038d179c (diff) | |
| download | ffmpeg-6d96bae9c480e020e9f51fabd5642d7ae6020943.tar.gz | |
avcodec/adpcm: XA: Check shift similar to filter
Fixes: negative shift
Fixes: 22499/clusterfuzz-testcase-minimized-ffmpeg_AV_CODEC_ID_ADPCM_XA_fuzzer-5765452130418688
Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/projects/ffmpeg
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
Diffstat (limited to 'libavcodec/adpcm.c')
| -rw-r--r-- | libavcodec/adpcm.c | 10 |
1 files changed, 9 insertions, 1 deletions
diff --git a/libavcodec/adpcm.c b/libavcodec/adpcm.c index dc4a9222af..79c5d625d1 100644 --- a/libavcodec/adpcm.c +++ b/libavcodec/adpcm.c @@ -559,6 +559,10 @@ static int xa_decode(AVCodecContext *avctx, int16_t *out0, int16_t *out1, avpriv_request_sample(avctx, "unknown XA-ADPCM filter %d", filter); filter=0; } + if (shift < 0) { + avpriv_request_sample(avctx, "unknown XA-ADPCM shift %d", shift); + shift = 0; + } f0 = xa_adpcm_table[filter][0]; f1 = xa_adpcm_table[filter][1]; @@ -584,10 +588,14 @@ static int xa_decode(AVCodecContext *avctx, int16_t *out0, int16_t *out1, shift = 12 - (in[5+i*2] & 15); filter = in[5+i*2] >> 4; - if (filter >= FF_ARRAY_ELEMS(xa_adpcm_table)) { + if (filter >= FF_ARRAY_ELEMS(xa_adpcm_table) || shift < 0) { avpriv_request_sample(avctx, "unknown XA-ADPCM filter %d", filter); filter=0; } + if (shift < 0) { + avpriv_request_sample(avctx, "unknown XA-ADPCM shift %d", shift); + shift = 0; + } f0 = xa_adpcm_table[filter][0]; f1 = xa_adpcm_table[filter][1]; |