[FFmpeg-devel] [PATCH 5/5] avcodec/fitsdec: Fail on 0 naxisn
Michael Niedermayer
michael at niedermayer.cc
Mon Sep 30 19:30:27 EEST 2019
Fixes: Timeout (100+ sec -> 23ms)
Fixes: 17769/clusterfuzz-testcase-minimized-ffmpeg_AV_CODEC_ID_FITS_fuzzer-5678314672357376
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/fitsdec.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/libavcodec/fitsdec.c b/libavcodec/fitsdec.c
index 2bb215943c..32a79cdd0d 100644
--- a/libavcodec/fitsdec.c
+++ b/libavcodec/fitsdec.c
@@ -143,7 +143,7 @@ static int fits_read_header(AVCodecContext *avctx, const uint8_t **ptr, FITSHead
size = abs(header->bitpix) >> 3;
for (i = 0; i < header->naxis; i++) {
- if (size && header->naxisn[i] > SIZE_MAX / size) {
+ if (size == 0 || header->naxisn[i] > SIZE_MAX / size) {
av_log(avctx, AV_LOG_ERROR, "unsupported size of FITS image");
return AVERROR_INVALIDDATA;
}
--
2.23.0
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