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bpf2bpf calls should support local stack variables in the callee #720

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dthaler opened this issue Oct 7, 2024 · 0 comments · May be fixed by #721
Open

bpf2bpf calls should support local stack variables in the callee #720

dthaler opened this issue Oct 7, 2024 · 0 comments · May be fixed by #721

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@dthaler
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dthaler commented Oct 7, 2024

Issue #451 covered adding basic bpf2bpf call support and PR #608 added support and tests when the callee just uses registers.

However, local stack variables are not correctly supported, as r10 is not changed. Thus, variables in the callee overwrite stack space in the caller.
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Fix stack access with bpf2bpf calls dthaler/ebpf-verifier
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@dthaler