diff options
| author | Michael Niedermayer <michael@niedermayer.cc> | 2022-03-21 21:03:13 +0100 |
|---|---|---|
| committer | Michael Niedermayer <michael@niedermayer.cc> | 2022-04-04 00:05:36 +0200 |
| commit | 70522b7262c6dcce9deefb311a2a8127ce447203 (patch) | |
| tree | fe2966bdb50e07647c1380d02c14151aeac4811f | |
| parent | 1ed490b9dc5770df691dd741e57a9072afcc39c9 (diff) | |
| download | ffmpeg-70522b7262c6dcce9deefb311a2a8127ce447203.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>
(cherry picked from commit 1291568c9834c02413ab5d87762308f15b4ae9c6)
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
| -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 0d5b3467d1..ded9d85000 100644 --- a/libavcodec/exr.c +++ b/libavcodec/exr.c @@ -1832,8 +1832,8 @@ 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", |