diff options
| author | Michael Niedermayer <michael@niedermayer.cc> | 2023-11-30 02:36:41 +0100 |
|---|---|---|
| committer | Michael Niedermayer <michael@niedermayer.cc> | 2023-12-05 12:38:16 +0100 |
| commit | 22daf2148fc072f8f347af939f88b3af7896ab60 (patch) | |
| tree | 0790fec07258a646ec10bceb4ebdcd7317cb33c9 /libavcodec/av1dec.c | |
| parent | 4cdf2c7f768015c74078544d153f243b6d9b9ac5 (diff) | |
| download | ffmpeg-22daf2148fc072f8f347af939f88b3af7896ab60.tar.gz | |
avcodec/av1dec: Fix resolving zero divisor
Fixes: Out of array read
Fixes: global-buffer-overflow-AV1
Found-by: "Leonelli, Matteo" <matteo.leonelli@cispa.de>
Tested-by: "Wang, Fei W" <fei.w.wang@intel.com>
Reviewed-by: "Wang, Fei W" <fei.w.wang@intel.com>
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
Diffstat (limited to 'libavcodec/av1dec.c')
| -rw-r--r-- | libavcodec/av1dec.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/libavcodec/av1dec.c b/libavcodec/av1dec.c index 6114cb78e6..4dcde234c6 100644 --- a/libavcodec/av1dec.c +++ b/libavcodec/av1dec.c @@ -177,7 +177,7 @@ static uint8_t get_shear_params_valid(AV1DecContext *s, int idx) int16_t alpha, beta, gamma, delta, divf, divs; int64_t v, w; int32_t *param = &s->cur_frame.gm_params[idx][0]; - if (param[2] < 0) + if (param[2] <= 0) return 0; alpha = av_clip_int16(param[2] - (1 << AV1_WARPEDMODEL_PREC_BITS)); |