src/interpreter.rs: Use wrapping_offset() for load/store operations #117
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Rust 1.83 introduces some additional out-of-bound checks [0], making it illegal to attempt to load at an out-of-bound access when trying to load/store values from/to register in rbpf's interpreter, and causing the program to panick even before we reach the safety checks from check_mem(). I understand we need to use wrapping_offset() rather than offset() in that case, which causes the operation itself (but not the resulting poitner) to be safe, and the checked to be deferred. See also the related GitHub issue [1]. [0] rust-lang/rust#130251 [1] #115 Reported-by: Ben Kimock <[email protected]> Signed-off-by: Quentin Monnet <[email protected]>
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Rust 1.83 introduces some additional out-of-bound checks, making it illegal to attempt to load at an out-of-bound access when trying to load/store values from/to register in rbpf's interpreter, and causing the program to panick even before we reach the safety checks from
check_mem().I understand we need to use
wrapping_offset()rather thanoffset()in that case, which causes the operation itself (but not the resulting poitner) to be safe, and the checked to be deferred. See also the related GitHub issue.Fixes: #115