[release/10.0] Fix cgroup v2 memory max extraction#130404
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In the edge case when the current process is assigned to the root cgroup, the hierarchical memory limit extraction goes past the root cgroup hierarchy mount path and the process ends up crashing. This was discovered in google colab environment when attempting to run NativeAOT application in a jupyter notebook Close #130092
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mangod9
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Jul 9, 2026
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Backport of #130377 to release/10.0
/cc @janvorli
Customer Impact
This issue prevents running .NET apps (both coreclr and NativeAOT) on Linux environments where the current process is assigned to cgroup that is the root of the cgroup hierarchy for the current cgroup mount and cgroup v2 is being used on the target device. It results in a crash (access violation) during app startup.
This was discovered in Google Colab environment when attempting to run NativeAOT application in a jupyter notebook.
Regression
Testing
Verified by running a simple .NET app compiled as NativeAOT in the Google Colab environment. It crashes without this fix and works fine with it. During testing, I've added extra printf logging to the cgroup info extraction code to make sure it is doing the right thing.
Risk
Low. The fix just ensures that we exit the cgroup hierarchy scan loop when we reach the mount root and that we process the memory.max file at this folder if it exists.