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| author | Michael Niedermayer <michael@niedermayer.cc> | 2021-01-16 22:44:33 +0100 |
|---|---|---|
| committer | Michael Niedermayer <michael@niedermayer.cc> | 2021-10-09 22:02:20 +0200 |
| commit | 56004939a18721a20b3c6a3d2a2b8e9e35e1e365 (patch) | |
| tree | c31f1752112259b344bbb2cbbfb4f8a7a025aa40 | |
| parent | f8a147dfde092f97dbc5d1f6fc5b0052dd602f7d (diff) | |
| download | ffmpeg-56004939a18721a20b3c6a3d2a2b8e9e35e1e365.tar.gz | |
avformat/nutdec: Fix integer overflow in count computation
Note, the value is checked a few lines later already
Fixes: signed integer overflow: -440402016 - 1879048064 cannot be represented in type 'int'
Fixes: 26910/clusterfuzz-testcase-minimized-ffmpeg_dem_NUT_fuzzer-6603876618469376
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 0014249fd92132515b3ff0ce034dd65e745cb400)
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
| -rw-r--r-- | libavformat/nutdec.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/libavformat/nutdec.c b/libavformat/nutdec.c index 2e309bcad7..67ccf1fe20 100644 --- a/libavformat/nutdec.c +++ b/libavformat/nutdec.c @@ -296,7 +296,7 @@ static int decode_main_header(NUTContext *nut) if (tmp_fields > 5) count = ffio_read_varlen(bc); else - count = tmp_mul - tmp_size; + count = tmp_mul - (unsigned)tmp_size; if (tmp_fields > 6) get_s(bc); if (tmp_fields > 7) |