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Re: [PATCH v2 1/2] Add libfuzzer target to fuzz/x86_instruction_emulator


  • To: Tamas K Lengyel <tamas@xxxxxxxxxxxxx>
  • From: Jan Beulich <jbeulich@xxxxxxxx>
  • Date: Thu, 18 Jul 2024 13:02:59 +0200
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  • Cc: Andrew Cooper <andrew.cooper3@xxxxxxxxxx>, Roger Pau Monné <roger.pau@xxxxxxxxxx>, Anthony PERARD <anthony@xxxxxxxxxxxxxx>, xen-devel@xxxxxxxxxxxxxxxxxxxx
  • Delivery-date: Thu, 18 Jul 2024 11:03:16 +0000
  • List-id: Xen developer discussion <xen-devel.lists.xenproject.org>

On 26.06.2024 00:47, Tamas K Lengyel wrote:
> This target enables integration into oss-fuzz. Changing invalid input return
> to -1 as values other then 0/-1 are reserved by libfuzzer.

And existing behavior (for afl) is unaffected because there we (wrongly)
ignore the return value altogether.

> @@ -67,7 +70,8 @@ distclean: clean
>  
>  .PHONY: clean
>  clean:
> -     rm -f *.a *.o $(DEPS_RM) afl-harness afl-harness-cov *.gcda *.gcno 
> *.gcov
> +     rm -f *.a *.o $(DEPS_RM) *.gcda *.gcno *.gcov \
> +        afl-harness afl-harness-cov libfuzzer-harness
>       rm -rf x86_emulate x86-emulate.c x86-emulate.h wrappers.c cpuid.c

This is what I said for v1:

"I'm inclined to suggest it's time to split this line (e.g. keeping all the
 wildcard patterns together and moving the rest to a new rm invocation)."

Could this really be misunderstood to mean anything other than

clean:
        rm -f *.a *.o $(DEPS_RM) *.gcda *.gcno *.gcov
        rm -f afl-harness afl-harness-cov libfuzzer-harness
        rm -rf x86_emulate x86-emulate.c x86-emulate.h wrappers.c cpuid.c

? With that
Acked-by: Jan Beulich <jbeulich@xxxxxxxx>
and I'm kind of okay making that adjustment myself while committing.

Jan



 


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