On Wed, Feb 12, 2020 at 12:50 PM Hauke Mehrtens <hauke.mehrt...@intel.com> wrote: > > The adds an option to activate KCOV (Code coverage for fuzzing). >
Reviewed-by: Alexandru Ardelean <ardeleana...@gmail.com> > Signed-off-by: Hauke Mehrtens <hauke.mehrt...@intel.com> > --- > config/Config-kernel.in | 33 +++++++++++++++++++++++++++++++++ > 1 file changed, 33 insertions(+) > > diff --git a/config/Config-kernel.in b/config/Config-kernel.in > index 3059a45f48..8e9e3518bf 100644 > --- a/config/Config-kernel.in > +++ b/config/Config-kernel.in > @@ -172,6 +172,39 @@ config KERNEL_KASAN_INLINE > > endchoice > > +config KERNEL_KCOV > + bool "Compile the kernel with code coverage for fuzzing" > + select KERNEL_DEBUG_FS > + help > + KCOV exposes kernel code coverage information in a form suitable > + for coverage-guided fuzzing (randomized testing). > + > + If RANDOMIZE_BASE is enabled, PC values will not be stable across > + different machines and across reboots. If you need stable PC values, > + disable RANDOMIZE_BASE. > + > + For more details, see Documentation/kcov.txt. > + > +config KERNEL_KCOV_ENABLE_COMPARISONS > + bool "Enable comparison operands collection by KCOV" > + depends on KERNEL_KCOV > + help > + KCOV also exposes operands of every comparison in the instrumented > + code along with operand sizes and PCs of the comparison > instructions. > + These operands can be used by fuzzing engines to improve the quality > + of fuzzing coverage. > + > +config KERNEL_KCOV_INSTRUMENT_ALL > + bool "Instrument all code by default" > + depends on KERNEL_KCOV > + default y if KERNEL_KCOV > + help > + If you are doing generic system call fuzzing (like e.g. syzkaller), > + then you will want to instrument the whole kernel and you should > + say y here. If you are doing more targeted fuzzing (like e.g. > + filesystem fuzzing with AFL) then you will want to enable coverage > + for more specific subsets of files, and should say n here. > + > config KERNEL_TASKSTATS > bool "Compile the kernel with task resource/io statistics and > accounting" > default n > -- > 2.17.1 > > > _______________________________________________ > openwrt-devel mailing list > openwrt-devel@lists.openwrt.org > https://lists.openwrt.org/mailman/listinfo/openwrt-devel _______________________________________________ openwrt-devel mailing list openwrt-devel@lists.openwrt.org https://lists.openwrt.org/mailman/listinfo/openwrt-devel
