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avformat/mov: Check sample_count and auxiliary_info_default_size to be 0

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This combination causes 0 size arrays to be allocated and to leak later

Fixes: memleak
Fixes: 64342/clusterfuzz-testcase-minimized-ffmpeg_dem_MOV_fuzzer-4520993686945792

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 3c43299e9e)
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
This commit is contained in:
Michael Niedermayer
2024-04-03 02:03:49 +02:00
parent 8464563b80
commit b171edca3c
1 changed files with 3 additions and 0 deletions
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libavformat/mov.c
+3
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@@ -6754,6 +6754,9 @@ static int mov_read_saiz(MOVContext *c, AVIOContext *pb, MOVAtom atom)
sample_count = avio_rb32(pb);
if (encryption_index->auxiliary_info_default_size == 0) {
if (sample_count == 0)
return AVERROR_INVALIDDATA;
encryption_index->auxiliary_info_sizes = av_malloc(sample_count);
if (!encryption_index->auxiliary_info_sizes)
return AVERROR(ENOMEM);