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| author | Michael Niedermayer <michael@niedermayer.cc> | 2022-03-21 21:03:13 +0100 |
|---|---|---|
| committer | Michael Niedermayer <michael@niedermayer.cc> | 2022-04-03 23:22:54 +0200 |
| commit | 1291568c9834c02413ab5d87762308f15b4ae9c6 (patch) | |
| tree | 7f8aa50e1f665ba067e87d58b5f6c5e0cf18ef45 /libavcodec/exr.c | |
| parent | 7f1279684e8e1e33c78577b7f0265c062e4e6232 (diff) | |
| download | ffmpeg-1291568c9834c02413ab5d87762308f15b4ae9c6.tar.gz | |
avcodec/exr: Avoid signed overflow in displayWindow
The inputs are unused except for this computation so wraparound
does not give an attacker any extra values as they are already fully
controlled
Fixes: signed integer overflow: 0 - -2147483648 cannot be represented in type 'int'
Fixes: 45820/clusterfuzz-testcase-minimized-ffmpeg_AV_CODEC_ID_EXR_fuzzer-5766159019933696
Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/projects/ffmpeg
Reviewed-by: Paul B Mahol <onemda@gmail.com>
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
Diffstat (limited to 'libavcodec/exr.c')
| -rw-r--r-- | libavcodec/exr.c | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/libavcodec/exr.c b/libavcodec/exr.c index dd5924245f..f338ff0085 100644 --- a/libavcodec/exr.c +++ b/libavcodec/exr.c @@ -1833,8 +1833,8 @@ static int decode_header(EXRContext *s, AVFrame *frame) dx = bytestream2_get_le32(gb); dy = bytestream2_get_le32(gb); - s->w = dx - sx + 1; - s->h = dy - sy + 1; + s->w = (unsigned)dx - sx + 1; + s->h = (unsigned)dy - sy + 1; continue; } else if ((var_size = check_header_variable(s, "lineOrder", |