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authorMichael Niedermayer <michael@niedermayer.cc>2022-07-12 20:43:20 +0200
committerMichael Niedermayer <michael@niedermayer.cc>2022-10-09 22:15:41 +0200
commit85d59a6a987b47717651e488dcf8a0de861c3b1e (patch)
treec404b40254a179c6134f0cd810962cc4228450f5 /libavcodec/lagarith.c
parent99f1f07b78c7a73f1e1eea5678b88c2b9d5bac3a (diff)
downloadffmpeg-85d59a6a987b47717651e488dcf8a0de861c3b1e.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>
Diffstat (limited to 'libavcodec/lagarith.c')
-rw-r--r--libavcodec/lagarith.c3
1 files changed, 3 insertions, 0 deletions
diff --git a/libavcodec/lagarith.c b/libavcodec/lagarith.c
index 1342c98961..54153c6a69 100644
--- a/libavcodec/lagarith.c
+++ b/libavcodec/lagarith.c
@@ -408,6 +408,9 @@ 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]);