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| author | Vitaly Buka <vitalybuka-at-google.com@ffmpeg.org> | 2017-08-20 11:56:47 -0700 |
|---|---|---|
| committer | Michael Niedermayer <michael@niedermayer.cc> | 2017-09-17 12:21:32 +0200 |
| commit | 50cb32480b7691933756bc8a04265a1e488b5e06 (patch) | |
| tree | 94a01687a111ccf4b39033329fdf980c3c8fb71b | |
| parent | 74410f2abab091b2fdf995fdb669873e8f7e1d0e (diff) | |
| download | ffmpeg-50cb32480b7691933756bc8a04265a1e488b5e06.tar.gz | |
avformat/aviobuf: Fix signed integer overflow in avio_seek()
Signed integer overflow is undefined behavior.
Detected with clang and -fsanitize=signed-integer-overflow
Signed-off-by: Vitaly Buka <vitalybuka@google.com>
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
(cherry picked from commit eca2a49716ae1f42804dd3545da2f740edf03250)
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
| -rw-r--r-- | libavformat/aviobuf.c | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/libavformat/aviobuf.c b/libavformat/aviobuf.c index 134d627a6e..02f6d38966 100644 --- a/libavformat/aviobuf.c +++ b/libavformat/aviobuf.c @@ -249,6 +249,8 @@ int64_t avio_seek(AVIOContext *s, int64_t offset, int whence) offset1 = pos + (s->buf_ptr - s->buffer); if (offset == 0) return offset1; + if (offset > INT64_MAX - offset1) + return AVERROR(EINVAL); offset += offset1; } if (offset < 0) |