From: Michael Niedermayer <michael@niedermayer.cc>
To: FFmpeg development discussions and patches <ffmpeg-devel@ffmpeg.org>
Subject: [FFmpeg-devel] [PATCH 1/2] avcodec/tiff: Check tile_length and tile_width
Date: Fri, 22 Jul 2022 08:55:49 +0200
Message-ID: <20220722065550.5431-1-michael@niedermayer.cc> (raw)
Fixes: Division by 0
Fixes: 49235/clusterfuzz-testcase-minimized-ffmpeg_AV_CODEC_ID_TIFF_fuzzer-5495613847896064
Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/projects/ffmpeg
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
---
libavcodec/tiff.c | 3 +++
1 file changed, 3 insertions(+)
diff --git a/libavcodec/tiff.c b/libavcodec/tiff.c
index 349df14035..329eafe494 100644
--- a/libavcodec/tiff.c
+++ b/libavcodec/tiff.c
@@ -965,6 +965,9 @@ static int dng_decode_tiles(AVCodecContext *avctx, AVFrame *frame,
int pos_x = 0, pos_y = 0;
int ret;
+ if (s->tile_width <= 0 || s->tile_length <= 0)
+ return AVERROR_INVALIDDATA;
+
has_width_leftover = (s->width % s->tile_width != 0);
has_height_leftover = (s->height % s->tile_length != 0);
--
2.17.1
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next reply other threads:[~2022-07-22 6:56 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-07-22 6:55 Michael Niedermayer [this message]
2022-07-22 6:55 ` [FFmpeg-devel] [PATCH 2/2] avcodec/hevc_filter: copy_CTB() only within width&height Michael Niedermayer
2022-07-22 15:24 ` [FFmpeg-devel] [PATCH 1/2] avcodec/tiff: Check tile_length and tile_width Michael Niedermayer
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