Fixes ticket #8327.
Signed-off-by: James Almer <[email protected]>
---
libavcodec/tiff.c | 4 ++++
1 file changed, 4 insertions(+)
diff --git a/libavcodec/tiff.c b/libavcodec/tiff.c
index f537e99b5a..c34e97cd6d 100644
--- a/libavcodec/tiff.c
+++ b/libavcodec/tiff.c
@@ -1413,6 +1413,10 @@ static int tiff_decode_tag(TiffContext *s, AVFrame
*frame)
if (type == TIFF_RATIONAL) {
value = ff_tget(&s->gb, TIFF_LONG, s->le);
value2 = ff_tget(&s->gb, TIFF_LONG, s->le);
+ if (!value2) {
+ av_log(s->avctx, AV_LOG_ERROR, "Invalid black level
denominator\n");
+ return AVERROR_INVALIDDATA;
+ }
s->black_level = value / value2;
} else
--
2.23.0
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