[FFmpeg-devel] [PATCH 1/5] avcodec/tiff: Check camera_calibration for 0
Michael Niedermayer
michael at niedermayer.cc
Sun Dec 18 19:08:19 EET 2022
Fixes: division by 0
Fixes: 53926/clusterfuzz-testcase-minimized-ffmpeg_AV_CODEC_ID_TIFF_fuzzer-5680347889401856
Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/projects/ffmpeg
Signed-off-by: Michael Niedermayer <michael at niedermayer.cc>
---
libavcodec/tiff.c | 6 ++++--
1 file changed, 4 insertions(+), 2 deletions(-)
diff --git a/libavcodec/tiff.c b/libavcodec/tiff.c
index 41b5a6b7e4..820457fedc 100644
--- a/libavcodec/tiff.c
+++ b/libavcodec/tiff.c
@@ -2050,8 +2050,10 @@ again:
}
if (!s->use_color_matrix) {
- for (i = 0; i < 3; i++)
- s->premultiply[i] /= s->camera_calibration[i][i];
+ for (i = 0; i < 3; i++) {
+ if (s->camera_calibration[i][i])
+ s->premultiply[i] /= s->camera_calibration[i][i];
+ }
} else {
for (int c = 0; c < 3; c++) {
for (i = 0; i < 3; i++) {
--
2.17.1
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