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| author | Michael Niedermayer <michael@niedermayer.cc> | 2017-05-08 02:58:54 +0200 |
|---|---|---|
| committer | Michael Niedermayer <michael@niedermayer.cc> | 2017-05-08 03:25:17 +0200 |
| commit | 5f928c5201c077b9765610bc5304235c3f1d9bd6 (patch) | |
| tree | f8ad2efb4faa42464c371a3df09eac21ff535c35 /libavcodec/rangecoder.c | |
| parent | 3a4d387195a5eb3c1700071af8d8150e4f7f6600 (diff) | |
avcodec/rangecoder: Test for invalid corner case
Fixes runtime error: left shift of 1912602815 by 8 places cannot be represented in type 'int'
Fixes: 1403/clusterfuzz-testcase-minimized-4724820484816896
Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/targets/ffmpeg
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
Diffstat (limited to 'libavcodec/rangecoder.c')
| -rw-r--r-- | libavcodec/rangecoder.c | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/libavcodec/rangecoder.c b/libavcodec/rangecoder.c index 9c6ef75b69..d7a2774d27 100644 --- a/libavcodec/rangecoder.c +++ b/libavcodec/rangecoder.c @@ -58,6 +58,10 @@ av_cold void ff_init_range_decoder(RangeCoder *c, const uint8_t *buf, c->low = AV_RB16(c->bytestream); c->bytestream += 2; + if (c->low >= 0xFF00) { + c->low = 0xFF00; + c->bytestream_end = c->bytestream + 2; + } } void ff_build_rac_states(RangeCoder *c, int factor, int max_p) |