[FFmpeg-cvslog] avcodec/faxcompr: Check remaining bits on error in decode_group3_1d_line()
Michael Niedermayer
git at videolan.org
Thu Apr 22 16:54:49 EEST 2021
ffmpeg | branch: master | Michael Niedermayer <michael at niedermayer.cc> | Thu Apr 15 20:08:22 2021 +0200| [7b3881f0da6da00cb6b5b123328e2fbfca936c47] | committer: Michael Niedermayer
avcodec/faxcompr: Check remaining bits on error in decode_group3_1d_line()
Fixes: Timeout
Fixes: 32886/clusterfuzz-testcase-minimized-ffmpeg_AV_CODEC_ID_TIFF_fuzzer-4779761466474496
Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/projects/ffmpeg
Signed-off-by: Michael Niedermayer <michael at niedermayer.cc>
> http://git.videolan.org/gitweb.cgi/ffmpeg.git/?a=commit;h=7b3881f0da6da00cb6b5b123328e2fbfca936c47
---
libavcodec/faxcompr.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/libavcodec/faxcompr.c b/libavcodec/faxcompr.c
index 3dd64cf730..7bf11d80ca 100644
--- a/libavcodec/faxcompr.c
+++ b/libavcodec/faxcompr.c
@@ -227,7 +227,7 @@ static int decode_group3_1d_line(AVCodecContext *avctx, GetBitContext *gb,
run = 0;
mode = !mode;
} else if ((int)t == -1) {
- if (show_bits(gb, 12) == 15) {
+ if (get_bits_left(gb) > 12 && show_bits(gb, 12) == 15) {
int ret;
skip_bits(gb, 12);
ret = decode_uncompressed(avctx, gb, &pix_left, &runs, runend, &mode);
More information about the ffmpeg-cvslog
mailing list