4ab3d11366
linux_exec() marks code sections RO+X for W^X and reverts them to RW+NX in a loop just before returning, because EDK2 requires freed buffers to be writable and non-executable or FreePages() crashes. Not every error path is currently covered. Switch to a _cleanup_ helper so that every return path is covered. Follow-up for56d19b633d(cherry picked from commitba0c1c617e) (cherry picked from commitb2644bfe8f)
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