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A remotely selected CPU can be re-advertised as idle by an idle-to-idle re-pick before the BPF program validates the selection. Checking that the selected CPU remains absent from the idle mask is therefore inherently racy. Validate a stable local invariant instead: a CPU executing ops.select_cpu() or ops.enqueue() in a non-idle scheduling context must not be advertised as idle. Read the idle mask without modifying it and also validate selected CPUs against the requested domain and task affinity. Suggested-by: Kuba Piecuch <jpiecuch@google.com> Signed-off-by: Andrea Righi <arighi@nvidia.com> Reviewed-by: Kuba Piecuch <jpiecuch@google.com> Signed-off-by: Tejun Heo <tj@kernel.org> |
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| crypto/chacha20-s390 | ||
| cxl | ||
| fault-injection | ||
| ktest | ||
| kunit | ||
| memblock | ||
| nvdimm | ||
| radix-tree | ||
| rbtree | ||
| scatterlist | ||
| selftests | ||
| shared | ||
| vma | ||
| vsock | ||