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| author | Michael Niedermayer <michael@niedermayer.cc> | 2021-01-16 22:44:33 +0100 |
|---|---|---|
| committer | Michael Niedermayer <michael@niedermayer.cc> | 2021-10-17 21:34:53 +0200 |
| commit | 2d03bbcd780d2762c7e4f2f686d7bac78190a2cb (patch) | |
| tree | ce7ac32cd89c1a75f089e8dd00039c19611ba16f | |
| parent | 6fa82a09b92c1c7ac69009c859f26bb6ebe9db97 (diff) | |
| download | ffmpeg-2d03bbcd780d2762c7e4f2f686d7bac78190a2cb.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 bfa2bade27..e5ff0d757d 100644 --- a/libavformat/nutdec.c +++ b/libavformat/nutdec.c @@ -294,7 +294,7 @@ 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) |