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| author | Michael Niedermayer <michael@niedermayer.cc> | 2022-09-12 19:55:09 +0200 |
|---|---|---|
| committer | Michael Niedermayer <michael@niedermayer.cc> | 2022-09-16 21:30:57 +0200 |
| commit | 43a4854510a3d596e114d899177a5b3b323ca9fb (patch) | |
| tree | ffb4f0eb077cda6f1a1c31d56c2a62321c586d90 /libavcodec/tiff.c | |
| parent | fb233771ce3205d25551df1c031eb520ca9d7a99 (diff) | |
| download | ffmpeg-43a4854510a3d596e114d899177a5b3b323ca9fb.tar.gz | |
avcodec/tiff: Fix loop detection
Fixes regression with tickets/4364/L1004220.DNG
Reviewed-by: Paul B Mahol <onemda@gmail.com>
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
Diffstat (limited to 'libavcodec/tiff.c')
| -rw-r--r-- | libavcodec/tiff.c | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/libavcodec/tiff.c b/libavcodec/tiff.c index beb427e007..226050744f 100644 --- a/libavcodec/tiff.c +++ b/libavcodec/tiff.c @@ -1747,7 +1747,7 @@ static int decode_frame(AVCodecContext *avctx, AVFrame *p, int *got_frame, AVPacket *avpkt) { TiffContext *const s = avctx->priv_data; - unsigned off, last_off; + unsigned off, last_off = 0; int le, ret, plane, planes; int i, j, entries, stride; unsigned soff, ssize; @@ -1812,7 +1812,6 @@ again: /** whether we should process this multi-page IFD's next page */ retry_for_page = s->get_page && s->cur_page + 1 < s->get_page; // get_page is 1-indexed - last_off = off; if (retry_for_page) { // set offset to the next IFD off = ff_tget_long(&s->gb, le); @@ -1830,6 +1829,7 @@ again: avpriv_request_sample(s->avctx, "non increasing IFD offset"); return AVERROR_INVALIDDATA; } + last_off = off; if (off >= UINT_MAX - 14 || avpkt->size < off + 14) { av_log(avctx, AV_LOG_ERROR, "IFD offset is greater than image size\n"); return AVERROR_INVALIDDATA; |