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| author | Michael Niedermayer <michael@niedermayer.cc> | 2020-05-10 21:09:45 +0200 |
|---|---|---|
| committer | Michael Niedermayer <michael@niedermayer.cc> | 2020-06-14 19:17:07 +0200 |
| commit | 61d9bf514de0acf256aa554e0c431e7c91e42a5c (patch) | |
| tree | a9ec8d398de56a4b1efc3456744e18917b56c7b7 /libavcodec/sonic.c | |
| parent | 75d520e33704447f1b29ac47fd9e40994a6bc659 (diff) | |
| download | ffmpeg-61d9bf514de0acf256aa554e0c431e7c91e42a5c.tar.gz | |
avcodec/sonic: Fix several integer state overflows
Fixes: signed integer overflow: -234 * -14797801 cannot be represented in type 'int'
Fixes: 20492/clusterfuzz-testcase-minimized-ffmpeg_AV_CODEC_ID_SONIC_fuzzer-5695924975435776
Fixes: 22275/clusterfuzz-testcase-minimized-ffmpeg_AV_CODEC_ID_SONIC_fuzzer-5695924975435776
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/sonic.c')
| -rw-r--r-- | libavcodec/sonic.c | 6 |
1 files changed, 3 insertions, 3 deletions
diff --git a/libavcodec/sonic.c b/libavcodec/sonic.c index b82c44344c..ea6ef10c9e 100644 --- a/libavcodec/sonic.c +++ b/libavcodec/sonic.c @@ -458,8 +458,8 @@ static void predictor_init_state(int *k, int *state, int order) for (j = 0, p = i+1; p < order; j++,p++) { - int tmp = x + shift_down(k[j] * state[p], LATTICE_SHIFT); - state[p] += shift_down(k[j]*x, LATTICE_SHIFT); + int tmp = x + shift_down(k[j] * (unsigned)state[p], LATTICE_SHIFT); + state[p] += shift_down(k[j]* (unsigned)x, LATTICE_SHIFT); x = tmp; } } @@ -467,7 +467,7 @@ static void predictor_init_state(int *k, int *state, int order) static int predictor_calc_error(int *k, int *state, int order, int error) { - int i, x = error - shift_down(k[order-1] * state[order-1], LATTICE_SHIFT); + int i, x = error - shift_down(k[order-1] * (unsigned)state[order-1], LATTICE_SHIFT); #if 1 int *k_ptr = &(k[order-2]), |