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NGC images such as nvcr.io/nvidia/pytorch keep HPC-X and other libraries under /opt, which the default policy does not grant. `import torch` then fails with "libmpi.so.40: cannot open shared object file", and the denial is hard to diagnose: Landlock does not govern stat(), so ls and ldconfig still show the library, and glibc reports EACCES as "No such file or directory". Add an example policy that grants /opt and /sys read-only and /dev/shm read-write on top of the default policy, with a one-command CUDA check and an explanation of each addition. Signed-off-by: Dmitry Monakhov <dmonakhov@gmail.com>
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NGC images such as nvcr.io/nvidia/pytorch keep HPC-X and other libraries under /opt, which the default policy does not grant.
import torchthen fails with "libmpi.so.40: cannot open shared object file", and the denial is hard to diagnose: Landlock does not govern stat(), so ls and ldconfig still show the library, and glibc reports EACCES as "No such file or directory".Add an example policy that grants /opt and /sys read-only and /dev/shm read-write on top of the default policy, with a one-command CUDA check and an explanation of each addition.