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| author | Michael Niedermayer <michael@niedermayer.cc> | 2021-06-09 21:20:04 +0200 |
|---|---|---|
| committer | Michael Niedermayer <michael@niedermayer.cc> | 2021-09-11 21:23:49 +0200 |
| commit | 40053dc0bc992f430c22dd80d37b7602cc878934 (patch) | |
| tree | fb952de6ca176b7c7f2c6394d21654de1467bb51 | |
| parent | 6bbacb011a4c784edbfd4b7c6026fb222e57d003 (diff) | |
| download | ffmpeg-40053dc0bc992f430c22dd80d37b7602cc878934.tar.gz | |
avcodec/faxcompr: Check if bits are available before reading in cmode == 9 || cmode == 10
Fixes: Timeout
Fixes: 34950/clusterfuzz-testcase-minimized-ffmpeg_AV_CODEC_ID_TIFF_fuzzer-5686764151898112
Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/projects/ffmpeg
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
(cherry picked from commit 7d8421e3d5bc1300687a65384baccbcb3874b7ac)
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
| -rw-r--r-- | libavcodec/faxcompr.c | 5 |
1 files changed, 4 insertions, 1 deletions
diff --git a/libavcodec/faxcompr.c b/libavcodec/faxcompr.c index 469999e046..7febcaa763 100644 --- a/libavcodec/faxcompr.c +++ b/libavcodec/faxcompr.c @@ -301,7 +301,10 @@ static int decode_group3_2d_line(AVCodecContext *avctx, GetBitContext *gb, mode = !mode; } } else if (cmode == 9 || cmode == 10) { - int xxx = get_bits(gb, 3); + int xxx; + if (get_bits_left(gb) < 3) + return AVERROR_INVALIDDATA; + xxx = get_bits(gb, 3); if (cmode == 9 && xxx == 7) { int ret; int pix_left = width - offs; |