Re: [RFC/PATCH v2 01/10] Add kernel address sanitizer infrastructure.

[Sasha Levin]

On 09/10/2014 10:31 AM, Andrey Ryabinin wrote:
> +ifdef CONFIG_KASAN
> +  ifeq ($(call cc-option, $(CFLAGS_KASAN)),)
> +    $(warning Cannot use CONFIG_KASAN: \
> +	      -fsanitize=kernel-address not supported by compiler)
> +  endif
> +endif

This seems to always indicate that my gcc doesn't support
-fsanitize=kernel-address:

Makefile:769: Cannot use CONFIG_KASAN: -fsanitize=kernel-address not supported by compiler

Even though:

$ gcc --version
gcc (GCC) 5.0.0 20140904 (experimental)
Copyright (C) 2014 Free Software Foundation, Inc.
This is free software; see the source for copying conditions.  There is NO
warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.

$ cat test.c
#include <stdio.h>
#include <sys/mman.h>

void __asan_init_v3(void) { }

int main(int argc, char *argv[])
{
        return 0;
}
$ gcc -fsanitize=kernel-address test.c
$ ./a.out
$


Thanks,
Sasha
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