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| author | Michael Niedermayer <michael@niedermayer.cc> | 2022-07-12 21:43:20 +0300 |
|---|---|---|
| committer | Michael Niedermayer <michael@niedermayer.cc> | 2022-07-16 17:24:11 +0300 |
| commit | 26be0c6c7aa98f2c5dc909891b5ea42f58924cc0 (patch) | |
| tree | 2c91314c85e31564424d9b2528fa77b293c03beb | |
| parent | b66fa64a9fdf7981c91613f2e220991677e66568 (diff) | |
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 ff3eded761..6e5d754dfb 100644 --- a/libavcodec/lagarith.c +++ b/libavcodec/lagarith.c @@ -404,6 +404,9 @@ 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]); |