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Oh, what is this. Fix a remotely-triggerable integer overflow: the way we
define TCPOLEN_SACK makes it unsigned, and the comparison in the while()
is unsigned too. That's not the expected behavior, the original code
wanted a signed comparison.
It's pretty easy to make 'hlen' go negative and trigger a buffer overflow.
This bug was reported 8 years ago by Lucio Albornoz in PR/44059.
define TCPOLEN_SACK makes it unsigned, and the comparison in the while()
is unsigned too. That's not the expected behavior, the original code
wanted a signed comparison.
It's pretty easy to make 'hlen' go negative and trigger a buffer overflow.
This bug was reported 8 years ago by Lucio Albornoz in PR/44059.