Commit 6622be01 authored by Vitaly Buka's avatar Vitaly Buka Committed by Michael Niedermayer

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: 's avatarVitaly Buka <vitalybuka@google.com>
Signed-off-by: 's avatarMichael Niedermayer <michael@niedermayer.cc>
(cherry picked from commit eca2a497)
Signed-off-by: 's avatarMichael Niedermayer <michael@niedermayer.cc>
parent 7b6dba89
......@@ -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)
......
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