[jdk17u-dev] RFR: 8329995: Restricted access to `/proc` can cause JFR initialization to crash

[Christoph Langer]

On Fri, 31 May 2024 21:07:41 GMT, Neethu Prasad <duke at openjdk.org> wrote:

> Backport of JDK-8329995
> 
> The call to os::opendir("/proc") may return nulltptr if the /proc is not accessible due to restrictions placed by the SELinux. In that case the ProcessIterator will SIGSEG because it assumes the _dir, which is the variable storing the result of the os::opendir("/proc") call to be non-null.
> 
> The patch is missing regression test because it is very hard to simulate /proc not being accessible to the test process.
> 
> **Testing**
> All jdk_jfr and hotspot_gc tests passed.

@neethu-prasad please only request approval after the change has been reviewed. Will remove the fix-request flag (approval request) for now. Please re-request when you have a review.

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PR Comment: https://git.openjdk.org/jdk17u-dev/pull/2516#issuecomment-2148884544