Stream: git-wasmtime

Topic: wasmtime / issue #1093 cranelift-jit: should functions th...

view this post on Zulip Wasmtime GitHub notifications bot (May 04 2022 at 20:49):

cfallin edited issue #1093:

The function cranelift_simplejit::SimpleJITBuilder::symbol (as it's close related friend symbols, and maybe other funcions) take a *const u8 as parameter.
From what I can see, there is no check whatsoever on the value provided before it gets used here.
This function should probably either be marked as unsafe, or take something less permissive than a *const u8 (maybe a NewType whose builder is marked unsafe?). As of now it is possible to pass it a null pointer or a dangling pointer (dropped Vec, pointer to data from an old stack-frame...), and writing to any of those is definitely Undefined Behavior

Last updated: Nov 22 2024 at 17:03 UTC