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| author | Michael Niedermayer <michael@niedermayer.cc> | 2021-01-16 22:44:33 +0100 |
|---|---|---|
| committer | Michael Niedermayer <michael@niedermayer.cc> | 2021-09-11 21:23:48 +0200 |
| commit | 38f634ac7f6e9802c6a53680ba85341b714b9edd (patch) | |
| tree | 7f367af3e7e75be3aea93c54b7c2d8f50ee6da8b /libavformat | |
| parent | a34dd1d5018578f3cca2573bb672178ac034c39a (diff) | |
| download | ffmpeg-38f634ac7f6e9802c6a53680ba85341b714b9edd.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>
Diffstat (limited to 'libavformat')
| -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 27440c88d4..0f6e4b21bb 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) |