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| author | Michael Niedermayer <michael@niedermayer.cc> | 2020-09-08 23:03:19 +0200 |
|---|---|---|
| committer | Michael Niedermayer <michael@niedermayer.cc> | 2020-12-19 23:19:29 +0100 |
| commit | 2749e20d044c5b014b1cb2749d97078df3a88ba1 (patch) | |
| tree | a9e8b9cbc254c92596c8b8a6c50f0f1ccc4f3427 /libavcodec/fastaudio.c | |
| parent | 3336ca46440fe2237fc014a1ba8c3c0a9e5477ef (diff) | |
avcodec/fastaudio: Fix invalid shift exponent
Fixes: shift exponent 32 is too large for 32-bit type 'unsigned int'
Fixes: 25434/clusterfuzz-testcase-minimized-ffmpeg_AV_CODEC_ID_FASTAUDIO_fuzzer-6252363168612352
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/fastaudio.c')
| -rw-r--r-- | libavcodec/fastaudio.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/libavcodec/fastaudio.c b/libavcodec/fastaudio.c index 1dda310612..e50678cd3d 100644 --- a/libavcodec/fastaudio.c +++ b/libavcodec/fastaudio.c @@ -89,7 +89,7 @@ static int read_bits(int bits, int *ppos, unsigned *src) pos = *ppos; pos += bits; - r = src[(pos - 1) / 32] >> (32 - pos % 32); + r = src[(pos - 1) / 32] >> ((-pos) & 31); *ppos = pos; return r & ((1 << bits) - 1); |