[jdk18] RFR: 8273108: RunThese24H crashes with SEGV in markWord::displaced_mark_helper() after JDK-8268276

Sun Dec 12 16:09:24 UTC 2021

On Fri, 10 Dec 2021 00:17:36 GMT, Scott Gibbons <duke at openjdk.java.net> wrote:

> The base64 decoder overwrites memory past the end of its output buffer in certain cases. It will not overwrite if the encoded string length is < 64 bytes. It also will not overwrite if the encoded string length mod 64 is >= 16. So the case where it will overwrite is when the input string length (the encoded byte length) mod 64 is less than 16.
> 
> I also added a test case to detect this overrun.

All testing passed.

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Marked as reviewed by kvn (Reviewer).

PR: https://git.openjdk.java.net/jdk18/pull/4