On Wed, Mar 25, 2020 at 5:13 PM <glider@xxxxxxxxxx> wrote: > > KMSAN doesn't currently support UNWINDER_ORC, causing the kernel to > freeze at boot time. > See http://github.com/google/kmsan/issues/48. > > Signed-off-by: Alexander Potapenko <glider@xxxxxxxxxx> > Cc: Qian Cai <cai@xxxxxx> > Cc: Christoph Hellwig <hch@xxxxxx> > Cc: Herbert Xu <herbert@xxxxxxxxxxxxxxxxxxx> > Cc: Harry Wentland <harry.wentland@xxxxxxx> > Cc: Vegard Nossum <vegard.nossum@xxxxxxxxxx> > Cc: Dmitry Vyukov <dvyukov@xxxxxxxxxx> > Cc: Marco Elver <elver@xxxxxxxxxx> > Cc: Andrey Konovalov <andreyknvl@xxxxxxxxxx> > Cc: linux-mm@xxxxxxxxx > > --- > This patch is part of "kmsan: Kconfig changes to disable options > incompatible with KMSAN", which was split into smaller pieces. > > Change-Id: I9cb6ebbaeb9a38e9e1d015c68ab77d40420a7ad0 > --- > arch/x86/Kconfig.debug | 3 +++ > 1 file changed, 3 insertions(+) > > diff --git a/arch/x86/Kconfig.debug b/arch/x86/Kconfig.debug > index 2e74690b028a5..ad71eb2a416ec 100644 > --- a/arch/x86/Kconfig.debug > +++ b/arch/x86/Kconfig.debug > @@ -276,6 +276,9 @@ choice > config UNWINDER_ORC > bool "ORC unwinder" > depends on X86_64 > + # KMSAN doesn't support UNWINDER_ORC yet, > + # see https://github.com/google/kmsan/issues/48. > + depends on !KMSAN Should we rather make KMSAN depend on !UNWINDER_ORC? It seems more logical to add this into KMSAN related code, as it's an issue with KMSAN. > select STACK_VALIDATION > ---help--- > This option enables the ORC (Oops Rewind Capability) unwinder for > -- > 2.25.1.696.g5e7596f4ac-goog >
