Re: Is this the ultimate stack-smash fix?

From: Manfred Spraul (manfred@colorfullife.com)
Date: Thu Feb 15 2001 - 10:29:49 EST

"Eric W. Biederman" wrote:
>
> But the gcc bounds checking work is the ultimate buffer overflow fix.
> You can recompile all of your trusted applications, and libraries with
> it and be safe from one source of bugs.
>

void main(int argc, char **argv[])
{
        char local[128];
        if(argc > 2)
                strcpy(local,argv[1]);
}

Unless you modify the ABI and pass the array bounds around you won't
catch such problems, and I won't even mention unions and

struct dyn_data {
        int len;
        char data[];
} 

--
	Manfred
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This archive was generated by hypermail 2b29 : Thu Feb 15 2001 - 21:00:26 EST