| Message ID | 20220321201946.16919-4-michael@niedermayer.cc |
|---|---|
| State | Accepted |
| Commit | 7f1279684e8e1e33c78577b7f0265c062e4e6232 |
| Headers | show |
| Series | [FFmpeg-devel,1/5] avcodec/vp9_superframe_bsf: Check in size | expand |
| Context | Check | Description |
|---|---|---|
| yinshiyou/make_loongarch64 | success | Make finished |
| yinshiyou/make_fate_loongarch64 | success | Make fate finished |
On Mon, Mar 21, 2022 at 09:19:45PM +0100, Michael Niedermayer wrote: > Fixes: signed integer overflow: -128275513086 * -76056576 cannot be represented in type 'long' > Fixes: 45818/clusterfuzz-testcase-minimized-ffmpeg_AV_CODEC_ID_DIRAC_fuzzer-5129799149944832 > > Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/projects/ffmpeg > Signed-off-by: Michael Niedermayer <michael@niedermayer.cc> > --- > libavcodec/diracdec.c | 4 ++-- > 1 file changed, 2 insertions(+), 2 deletions(-) will apply [...]
diff --git a/libavcodec/diracdec.c b/libavcodec/diracdec.c index d5c095c689..12f97feb6b 100644 --- a/libavcodec/diracdec.c +++ b/libavcodec/diracdec.c @@ -1433,8 +1433,8 @@ static void global_mv(DiracContext *s, DiracBlock *block, int x, int y, int ref) int *c = s->globalmc[ref].perspective; int64_t m = (1<<ep) - (c[0]*(int64_t)x + c[1]*(int64_t)y); - int64_t mx = m * (int64_t)((A[0][0] * (int64_t)x + A[0][1]*(int64_t)y) + (1LL<<ez) * b[0]); - int64_t my = m * (int64_t)((A[1][0] * (int64_t)x + A[1][1]*(int64_t)y) + (1LL<<ez) * b[1]); + int64_t mx = m * (uint64_t)((A[0][0] * (int64_t)x + A[0][1]*(int64_t)y) + (1LL<<ez) * b[0]); + int64_t my = m * (uint64_t)((A[1][0] * (int64_t)x + A[1][1]*(int64_t)y) + (1LL<<ez) * b[1]); block->u.mv[ref][0] = (mx + (1<<(ez+ep))) >> (ez+ep); block->u.mv[ref][1] = (my + (1<<(ez+ep))) >> (ez+ep);
Fixes: signed integer overflow: -128275513086 * -76056576 cannot be represented in type 'long' Fixes: 45818/clusterfuzz-testcase-minimized-ffmpeg_AV_CODEC_ID_DIRAC_fuzzer-5129799149944832 Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/projects/ffmpeg Signed-off-by: Michael Niedermayer <michael@niedermayer.cc> --- libavcodec/diracdec.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-)