diff options
| author | Michael Niedermayer <[email protected]> | 2021-01-16 22:44:33 +0100 |
|---|---|---|
| committer | Michael Niedermayer <[email protected]> | 2021-02-02 14:18:21 +0100 |
| commit | 87c071a7c86005ab68fa639401093eee1891cb03 (patch) | |
| tree | 321e9b381d07e07ee695105b356362761b990cb3 | |
| parent | 55ba3505ed774a4e97ec2dfec90ba89d1fa5d4aa (diff) | |
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 <[email protected]>
(cherry picked from commit 0014249fd92132515b3ff0ce034dd65e745cb400)
Signed-off-by: Michael Niedermayer <[email protected]>
| -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 3779dce2a8..b7020c5210 100644 --- a/libavformat/nutdec.c +++ b/libavformat/nutdec.c @@ -260,7 +260,7 @@ 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) |