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| author | Michael Niedermayer <michael@niedermayer.cc> | 2022-07-12 20:43:20 +0200 |
|---|---|---|
| committer | Michael Niedermayer <michael@niedermayer.cc> | 2022-09-01 00:41:28 +0200 |
| commit | f22b7e65c5fb45ab598505200733d3b3fce799fc (patch) | |
| tree | c2cd5e721b308fa179fe1895176cfa945b138cca | |
| parent | fe026fd0cba152cad783fe5b370b2dd5101fb2c9 (diff) | |
| download | ffmpeg-f22b7e65c5fb45ab598505200733d3b3fce799fc.tar.gz | |
avcodec/lagarith: Check dst/src in zero run code
Fixes: out of array access
Fixes: 48799/clusterfuzz-testcase-minimized-ffmpeg_AV_CODEC_ID_LAGARITH_fuzzer-4764457825337344
Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/projects/ffmpeg
Reviewed-by: Paul B Mahol <onemda@gmail.com>
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
(cherry picked from commit 9450f759748d02d1d284d2e4afd741cb0fe0c04a)
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
| -rw-r--r-- | libavcodec/lagarith.c | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/libavcodec/lagarith.c b/libavcodec/lagarith.c index 7220648bc4..ca4ab5cc53 100644 --- a/libavcodec/lagarith.c +++ b/libavcodec/lagarith.c @@ -409,6 +409,9 @@ output_zeros: if (zero_run) { zero_run = 0; i += esc_count; + if (i > end - dst || + i >= src_end - src) + return AVERROR_INVALIDDATA; memcpy(dst, src, i); dst += i; l->zeros_rem = lag_calc_zero_run(src[i]); |