SIMD-0431: revise to use minimum extension size approach#3
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deanmlittle merged 2 commits intoblueshift-gg:permissioned-extend-programfrom Mar 18, 2026
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- Near max account size (10 MiB): allow sub-10 KiB extends when less than 10 KiB of headroom remains - Frozen programs: already rejected by the loader with Immutable
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deanmlittle
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* Add review status * Updated (#3) * Updated * Fix lint * Update audit details * Update keys
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Revises 0431 to drop the permissioned signer and instead enforce a 10 KiB
minimum on
ExtendProgram. Instruction remains permissionless, accounts listdoes not change, and CPI restrictions are unchanged.
The 10 KiB floor makes greifing cost ~0.072 SOL per extend, which plugs the DoS
vector economically without breaking multisigs or self-upgrading programs.
Creds to jstarry for the idea.