On Mon, Dec 12, 2016 at 10:32 AM, Maninder Singh <maninder1.s@xxxxxxxxxxx> wrote: > This provide option to control sanity of read and write operations > Both read and write instrumentation increase size of uImage, So using > this option read or write instrumentation can be avoided if not required. > Useful in case of module sanity, using this uImage sanity can be avoided. > > Also user space ASAN provides this support for read/write instrumentation > control. Hi, Do you actually hit an issue with image size? In what context? Do you use inline/outline instrumentation? Does switching to the other option help? Does it make sense to ever disable writes? I assume that you are disabling reads, right? Disabling both certainly does not make sense. > Signed-off-by: Vaneet narang <v.narang@xxxxxxxxxxx> > Signed-off-by: Maninder Singh <maninder1.s@xxxxxxxxxxx> > Reviewed-by: Ajeet Yadav <ajeet.y@xxxxxxxxxxx> > --- > lib/Kconfig.kasan | 16 ++++++++++++++++ > scripts/Makefile.kasan | 4 ++++ > 2 files changed, 20 insertions(+) > > diff --git a/lib/Kconfig.kasan b/lib/Kconfig.kasan > index bd38aab..6f0f774 100644 > --- a/lib/Kconfig.kasan > +++ b/lib/Kconfig.kasan > @@ -45,6 +45,22 @@ config KASAN_INLINE > > endchoice > > +config KASAN_READS > + prompt "Read instrumentation" > + bool > + default y > + depends on KASAN > + help > + This configuration controls the sanity of memory read. /\/\/\ double space in "of memory" > + > +config KASAN_WRITES > + prompt "Write instrumentation" > + bool > + default y > + depends on KASAN > + help > + This configuration controls the sanity of memory write. > + > config TEST_KASAN > tristate "Module for testing kasan for bug detection" > depends on m && KASAN > diff --git a/scripts/Makefile.kasan b/scripts/Makefile.kasan > index 37323b0..a61b18e 100644 > --- a/scripts/Makefile.kasan > +++ b/scripts/Makefile.kasan > @@ -29,3 +29,7 @@ else > endif > endif > endif > + > +CFLAGS_KASAN += $(call cc-option, \ > + $(if $(CONFIG_KASAN_READS),, --param asan-instrument-reads=0) \ > + $(if $(CONFIG_KASAN_WRITES),, --param asan-instrument-writes=0)) > -- > 1.9.1 > -- To unsubscribe from this list: send the line "unsubscribe linux-kbuild" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
