[8u] RFR(XS): 8202600: [Zero] Undefined behaviour in src/os_cpu/linux_zero/vm/os_linux_zero.cpp

[Severin Gehwolf]

Hi,

Please review this trivial change which fixes a potential crasher bug
in JDK 8 Zero. JDK 10+ don't have this problem since they got fixed
with  JDK-8143245. I figured a smaller fix like this would be more
likely to get accepted as a backport. If you'd rather have JDK-8143245
backported to JDK 8, that would be fine with me too.

Bug: https://bugs.openjdk.java.net/browse/JDK-8202600
webrev: http://cr.openjdk.java.net/~sgehwolf/webrevs/JDK-8202600/webrev.jdk8.01/

Testing: We've been using this patch downstream for months now without
issues.

Thanks,
Severin