| Message ID | 20210211211715.6234-3-michael@niedermayer.cc |
|---|---|
| State | Accepted |
| Commit | 075d793ba87635b77f8302d8a454fa681f90d267 |
| Headers | show |
| Series | [FFmpeg-devel,1/4] avcodec/pnm_parser: Check av_image_get_buffer_size() for failure | expand |
| Context | Check | Description |
|---|---|---|
| andriy/x86_make | success | Make finished |
| andriy/x86_make_fate | success | Make fate finished |
| andriy/PPC64_make | success | Make finished |
| andriy/PPC64_make_fate | success | Make fate finished |
On Thu, Feb 11, 2021 at 10:17:14PM +0100, Michael Niedermayer wrote: > Fixes: signed integer overflow: -2147471366 - 18638 cannot be represented in type 'int' > Fixes: 30157/clusterfuzz-testcase-minimized-ffmpeg_AV_CODEC_ID_SONIC_fuzzer-5171199746506752 > > Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/projects/ffmpeg > Signed-off-by: Michael Niedermayer <michael@niedermayer.cc> > --- > libavcodec/sonic.c | 4 ++-- > 1 file changed, 2 insertions(+), 2 deletions(-) will apply [...]
diff --git a/libavcodec/sonic.c b/libavcodec/sonic.c index 32e94d24f6..c049f6aedc 100644 --- a/libavcodec/sonic.c +++ b/libavcodec/sonic.c @@ -475,13 +475,13 @@ static int predictor_calc_error(int *k, int *state, int order, int error) for (i = order-2; i >= 0; i--, k_ptr--, state_ptr--) { int k_value = *k_ptr, state_value = *state_ptr; - x -= shift_down(k_value * (unsigned)state_value, LATTICE_SHIFT); + x -= (unsigned)shift_down(k_value * (unsigned)state_value, LATTICE_SHIFT); state_ptr[1] = state_value + shift_down(k_value * (unsigned)x, LATTICE_SHIFT); } #else for (i = order-2; i >= 0; i--) { - x -= shift_down(k[i] * state[i], LATTICE_SHIFT); + x -= (unsigned)shift_down(k[i] * state[i], LATTICE_SHIFT); state[i+1] = state[i] + shift_down(k[i] * x, LATTICE_SHIFT); } #endif
Fixes: signed integer overflow: -2147471366 - 18638 cannot be represented in type 'int' Fixes: 30157/clusterfuzz-testcase-minimized-ffmpeg_AV_CODEC_ID_SONIC_fuzzer-5171199746506752 Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/projects/ffmpeg Signed-off-by: Michael Niedermayer <michael@niedermayer.cc> --- libavcodec/sonic.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-)