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1702: Fix UnixAddr::size on Linux and Android r=rtzoeller a=asomers SockaddrLike::size() is meant to return the amount of space that can be used to store the sockaddr. But on Linux-based OSes, UnixAddr contains an extra field to store the address's length. This field is not part of the address, and should not contribute to the value of size(). This bug can't cause an out-of-bounds write, and every OS that we test on can tolerate the greater-than-expected length, but it might confuse applications that implement functions similar to getsockname in userland. Co-authored-by: Alan Somers <asomers@gmail.com>
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