On Sun, 29 Sep 2024 06:23:34 GMT, Sebastian Lövdahl <[email protected]> wrote:
>> 8327114: Attach in Linux may have wrong behaviour when pid == ns_pid
>> (Kubernetes debug container)
>
> Sebastian Lövdahl has updated the pull request with a new target base due to
> a merge or a rebase. The incremental webrev excludes the unrelated changes
> brought in by the merge/rebase. The pull request contains eight additional
> commits since the last revision:
>
> - Merge remote-tracking branch 'upstream/master' into
> 8327114-attach-from-container-to-container
> - Clarify PID 1 check with comment
> - Adapt code style
> - Add test for the elevated privileges case
> - Remove unused `SELF_PID_NS`
> - Rewrite in line with suggestion from Larry Cable
> - Reworked attach logic
> - 8327114: Attach in Linux may have wrong behaviour when pid == ns_pid
> (Kubernetes debug container)
We are seeing a number of test failures after this was integrated. Failing
tests:
- containers/docker/TestJcmdWithSideCar.java
- com/sun/tools/attach/PermissionTest.java
-
I will file bugs, but the permission test fails because the new code throws a
SecurityException when the SecurityManager is enabled:
Caused by: java.security.AccessControlException: access denied
("java.io.FilePermission" "/proc/self/ns/mnt" "readlink")
at
java.base/java.security.AccessControlContext.checkPermission(AccessControlContext.java:488)
at
java.base/java.security.AccessController.checkPermission(AccessController.java:1085)
at
java.base/java.lang.SecurityManager.checkPermission(SecurityManager.java:411)
at
java.base/sun.nio.fs.UnixFileSystemProvider.readSymbolicLink(UnixFileSystemProvider.java:554)
at java.base/java.nio.file.Files.readSymbolicLink(Files.java:1474)
at
jdk.attach/sun.tools.attach.VirtualMachineImpl.<clinit>(VirtualMachineImpl.java:66)
-------------
PR Comment: https://git.openjdk.org/jdk/pull/19055#issuecomment-2385009640
