• xmo748@programming.dev
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      3 days ago

      So could have Java, Go, C# or any language with GC. With garbage collection, the options object stays alive as long as any CPU holds a pointer to it, so use-after-free can’t happen.

      Besides, this exploit is so hard to pull off the only realistic outcome is a kernel panic, and that hasn’t even been publicly demoed.

      • thingsiplay@lemmy.ml
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        3 days ago

        So could have Java, Go, C# or any language with GC.

        No. Those aren’t allowed in Linux Kernel.

        With garbage collection

        Garbage Collection is not usable in an operating system Kernel.

        • xmo748@programming.dev
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          3 days ago

          Clearly, but it’s worth pointing out that this kind of problem isn’t uniquely fixed by “just use Rust”.

          • thingsiplay@lemmy.ml
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            3 days ago

            I never said that only Rust prevents this. I just said using Rust in the Kernel would have prevented this issue.

            • xmo748@programming.dev
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              3 days ago

              Fair enough. Don’t you think it simplifies the issue a little bit? How long would it take to rewrite the entire TCP stack in rust?

              • thingsiplay@lemmy.ml
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                3 days ago

                I don’t think a rewrite in Rust is necessary for everything that has a bug. Instead fixing the bug is probably more secure, before such alternative Rust code is mature enough to replace it.

            • diaphragmwp@discuss.tchncs.de
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              3 days ago

              It doesn’t. It’s just a separate fact that Rust allows LLM generated code in. The common argument is that Rust doesn’t make everything it touches secure.

              • thingsiplay@lemmy.ml
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                3 days ago

                The common argument is that Rust doesn’t make everything it touches secure.

                No one said Rust makes everything it touches secure. You should stop thinking in black and white. I said this specific issue would not have happened with Rust, because Rust catches this type of issue at compilation time.

                • diaphragmwp@discuss.tchncs.de
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                  3 days ago

                  catches this type of issue at compilation time

                  This type of issue is called use-after-free.

                  I sent a link to a use-after-free bug in RedoxOS, the OS advertised as being written in Rust for security. The issue is tracked as CVE with severity 7.8.