From 4a3303d52096337dc109fbd523ecb4b46cddace1 Mon Sep 17 00:00:00 2001 From: Michael Niedermayer Date: Mon, 30 Sep 2019 08:50:41 +0200 Subject: avcodec/fitsdec: Fail on 0 naxisn 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 Reviewed-by: Paul B Mahol Signed-off-by: Michael Niedermayer --- libavcodec/fitsdec.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) (limited to 'libavcodec') diff --git a/libavcodec/fitsdec.c b/libavcodec/fitsdec.c index a20b8fa..1f06754 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; } -- cgit v1.1